October 13, 2025 – Regular Meeting Agenda – 7:00 p.m.
Printed on Recycled Paper See Reverse
47+---
October 13, 2025 – City Council Regular Meeting – 7:00 p.m.
City Council Chamber
390 Towne Centre Drive
Lathrop, California
(209) 941-7200
www.ci.lathrop.ca.us
City Council
Paul Akinjo, Mayor
Jennifer Torres-O’Callaghan, Vice Mayor
Minnie Diallo, Councilmember
Stephen Dresser, Councilmember
Diane Lazard, Councilmember
City Staff
Stephen Salvatore, City Manager
Salvador Navarrete, City Attorney
Michael King, Assistant City Manager
Thomas Hedegard, Deputy City Manager
Stephen Sealy, Chief of Police
Teresa Vargas, Government Services
Director / City Clerk
Brad Taylor, City Engineer
Tony Fernandes, Information Systems Director
Cari James, Finance Director
Juliana Burns, Human Resources Director
Rick Caguiat, Community Development
Director
Todd Sebastian, Parks and Recreation
Director
General Order of Business
1. Preliminary
• Call to Order
• Closed Session
• Roll Call
• Invocation
• Pledge of Allegiance
• Announcements by Mayor/City Mgr.
• Informational Items
• Declaration of Conflict of Interest
2. Presentations
3. Citizen’s Forum
4. Consent Calendar
5. Scheduled Items
• Public Hearings
• Appeals
• Referrals and Reports from
Commissions and Committees
• All Other Staff Reports and/or Action
Items
• Study Sessions
6. Council Communications
7. Adjournment
Order of Discussion
Generally, the order of discussion after introduction
of an item by the Mayor will include comments and
information by staff followed by City Council
questions and inquiries. The applicant, or their
authorized representative, or interested residents,
may then speak on the item; each speaker may only
speak once to each item. At the close of public
discussion, the item will be considered by the City
Council and action taken.
Consent Calendar
Items on the Consent Calendar are considered
routine by the City Council and will be enacted by one
motion and one vote. There will be no separate
discussion of these items unless a Councilmember or
interested resident so requests, in which case the
item will be removed from the Consent Calendar and
considered separately.
1 October 13, 2025 Lathrop City Council Regular Meeting Agenda Page 1
IMPORTANT NOTICE REGARDING THIS MEETING
This public meeting will be conducted in person; all members of the City Council will attend in person. Members of the public are welcome in person. This meeting will also be available for public participation by teleconference via ZoomGov at the following link:
https://www.zoomgov.com/j/1614132882?pwd=ehE4ZuF8RbWzQS 4GDNFoqyRJvO2yj6.1
During the meeting, those joining ZoomGov, will be allowed to speak prior to the close of public comment on an item. If you are using this method, please “raise the hand” feature to inform the City Clerk (meeting host) you wish to speak on the matter. Please ensure your computer speaker and microphone are fully functional.
For audio / calling in only, dial: +1 (669) 254-5252 or +1 (669) 216-1590 o To request to speak (same as the “raise hand” feature) press *9 / When the City Clerk calls your name, press *6 to unmute.
Meeting Webinar ID: 161 413 2882 / Passcode: 157339
If you are not able to attend the meeting in person or virtually - Public comment / questions will be accepted by email to City Clerk Teresa Vargas at [email protected]. Please refer to the Agenda Item or Public Comment Matter, and the date of the City Council Meeting, in your written communication.
Questions or comments submitted by email must be submitted by 4:00 p.m., on the day of the meeting.
To address the City Council in person, please submit a purple card to the City Clerk indicating name and number of the item upon which a person wishes to speak.
Council Meetings are live-streamed (with Closed Captioning) on Comcast Cable Channel 97, and on the City Council Webpage: https://www.ci.lathrop.ca.us/citycouncil/page/live-stream Addressing the Council
Any person may speak once on any item under discussion by the City Council after receiving recognition by the Mayor. Purple speaker cards will be available prior to and during the meeting. To address the City Council, a card must be submitted to the City Clerk indicating the name, address and number of the item upon which a person wishes to speak. When addressing the City Council, please walk to the lectern located in front of the City Council.
State your name and address. To ensure all persons, have the opportunity to speak, a time limit will be set by the Mayor for each speaker (see instructions on speaker form). In the interest of time, each speaker may only speak once on each individual agenda item; please limit your comments to new material; do not repeat what a prior speaker has said. If you challenge the nature of a proposed action in court, you may be limited to raising only those issues you or someone else raised at the public hearing described in this notice, or in written correspondence delivered to the City Council at, or prior to, the public hearing. 2 October 13, 2025 Lathrop City Council Regular Meeting Agenda Page 2 Citizen’s Forum
Any person desiring to speak on a matter, which is not scheduled on this agenda, may do so under the Citizen’s Forum section. Please submit your purple speaker card to the City Clerk prior to the commencement of Citizen’s Forum or submit your request to speak via the “raise hand” feature in ZoomGov. Only those who have submitted speaker cards, or have expressed an interest in speaking, prior to the conclusion of Citizen’s Forum will be called upon to speak.
Please be aware the California Government Code prohibits the City Council from taking any immediate action on an item, which does not appear on the agenda, unless the item meets stringent statutory requirements. The Mayor will limit the length of your presentation (see instructions on speaker form) and each speaker may only speak once on this agenda item.
Please note, the Council Chamber has limited occupancy due to social distancing.
To leave a voice message for all Councilmembers simultaneously, dial (209) 941-7230. To send an e-mail for Councilmembers simultaneously email: [email protected]. This City Council Agenda and meeting materials can be accessed by computer or any smart device at: https://www.ci.lathrop.ca.us/meetings
General Information
For reports citing supplemental documents relating to specific agenda items, these are available for review in the City Clerk’s Office. This agenda was posted at the following locations: City Hall, Community Center, Generations Center, Senior Center, and the LathropManteca Fire District “J" Street and Somerston Parkway Offices. The meetings of the Lathrop City Council are broadcast on Lathrop Comcast Cable Television Channel 97 and live streamed on the City’s website.
Assistance will be provided to those requiring accommodations for disabilities in compliance with the Americans with Disabilities Act of 1990. Notification 48 hours prior to the meeting will enable the City to make reasonable arrangements to ensure accessibility and/or accommodations to this meeting. [28 CFR 35.102-35.104 ADA Title II] Interested persons must request the accommodation at least 2 working days in advance of the meeting by contacting the City Clerk at (209) 941-7230. Information about the City or items scheduled on the agenda may be referred to:
Teresa Vargas, MMC
Government Services Director / City Clerk
390 Towne Centre Drive
Lathrop, CA 95330
Telephone: (209) 941-7230
3 October 13, 2025 Lathrop City Council Regular Meeting Agenda Page 3
CITY OF LATHROP
CITY COUNCIL REGULAR MEETING
MONDAY, OCTOBER 13, 2025, 7:00 P.M.
CLOSED SESSION, 6:15 P.M.
COUNCIL CHAMBER, CITY HALL
390 Towne Centre Drive
Lathrop, CA 95330
AGENDA
PLEASE NOTE: There will be a Closed Session commencing at 6:15 p.m. The Regular Meeting will reconvene at 7:00 p.m., or immediately following the Closed Session, whichever is later.
1. PRELIMINARY
1.1 CALL TO ORDER
1.2 CLOSED SESSION
1.2.1 CONFERENCE WITH LEGAL COUNSEL: Anticipated Litigation - Significant Exposure to Litigation Pursuant to Government Code Section 54956.9(a)
• 1 Potential Case
1.2.2 LIABILITY CLAIM: Pursuant to CA Government Code Section 54956.95:
• Claimant: Ayden Horn
Agency Claimed Against: City of Lathrop
RECONVENE
1.2.3 REPORT FROM CLOSED SESSION
1.3 ROLL CALL
1.4 INVOCATION
1.5 PLEDGE OF ALLEGIANCE
1.6 ANNOUNCEMENT(S) BY MAYOR / CITY MANAGER
1.7 INFORMATIONAL ITEM(S) - None
1.8 DECLARATION OF CONFLICT(S) OF INTEREST
4 October 13, 2025 Lathrop City Council Regular Meeting Agenda Page 4
2. PRESENTATIONS
2.1 PROCLAMATION DECLARING OCTOBER 2025 AS HINDU HERITAGE MONTH
2.2 RECOGNITION OF UTILITY PLANT SUPERVISOR CHRIS HART FOR 26
YEARS OF SERVICE WITH THE CITY OF LATHROP
2.3 INTRODUCTION OF NEW EMPLOYEE(S)
Information Services Department
• Jose Abundis, Information Systems Engineer
• Melissa Manske, Information Systems Engineer
3. CITIZEN’S FORUM
Any person desiring to speak on a matter which is not scheduled on this agenda may do so under Citizen’s Forum. Please submit a purple speaker card to the City Clerk prior to the commencement of Citizen’s Forum. Only those who have submitted speaker cards, or have expressed an interest in speaking, prior to the conclusion of Citizen’s Forum will be called upon to speak. Please be aware the California Government Code prohibits the City Council from taking any immediate action on an item, which does not appear on the agenda, unless the item meets stringent statutory requirements. The City Council can, however, allow its members or staff to briefly (no more than five (5) minutes) respond to statements made, to ask questions for clarification, make a brief announcement or report on his or her own activities. (See California Government Code Section 54954.2(a)). Unless directed otherwise by City Council majority, all questions asked and not answered at the meeting will be responded to in writing within 10 business days. ALL PUBLIC COMMENTS MUST BE
MADE IN COMPLIANCE WITH THE LATHROP CITY COUNCIL HANDBOOK OF RULES AND PROCEDURES!
4. CONSENT CALENDAR
Items on the Consent Calendar are considered routine by the City Council and will be enacted by one motion and one vote. There will be no separate discussion of these items unless the Mayor, Councilmember, or citizen so requests, in which event the item will be removed from the Consent Calendar and considered separately.
4.1 WAIVING OF READING OF ORDINANCES AND RESOLUTIONS
Waive the Reading in Full of Ordinances and Resolutions on Agenda and Adopt by Reading of Title Only, Unless Otherwise Requested by the Mayor or a Councilmember
4.2 APPROVAL OF MINUTES
Approve Minutes for the Regular City Council Meeting of August 11, 2025
4.3 SECOND READING AND ADOPTION OF ORDINANCE 25-472 OF THE CITY COUNCIL OF THE CITY OF LATHROP TO AMEND TITLE 15 “BUILDINGS AND CONSTRUCTION” TO INCORPORATE THE 2025 CALIFORNIA
BUILDING STANDARDS INTO THE LATHROP MUNICIPAL CODE
5 October 13, 2025 Lathrop City Council Regular Meeting Agenda Page 5 Waive Full Reading and Adopt Ordinance 25-472 to Amend Title 15 “Buildings and Construction” to Incorporate the 2025 California Building Standards into the Lathrop Municipal Code
4.4 SECOND READING AND ADOPTION OF ORDINANCE 25-473 OF THE CITY COUNCIL OF THE CITY OF LATHROP TO ADD CHAPTER 15.32 TO TITLE 15 “BUILDINGS AND CONSTRUCTION” TO THE LATHROP MUNICIPAL
CODE TO ESTABLISH AN EXPEDITED, STREAMLINE PERMITTING
PROCESS FOR ELECTRIC VEHICLE CHARGING STATIONS
Waive Full Reading and Adopt Ordinance 25-473 to Add Chapter 15.32 to Title 15 “Buildings and Construction” to the Lathrop Municipal Code to Establish an Expedited, Streamline Permitting Process for Electric Vehicle Charging Stations
4.5 ANNUAL REVIEW AND ADOPTION OF THE CITY’S INVESTMENT POLICY Adopt Resolution Approving the Annual Investment Policy for Fiscal Year 2025-26
4.6 APPROVE TABLE SPONSORSHIP AT THE MANTECA POLICE CHIEF'S
BLACK-TIE BALL, A NIGHT AMONG HEROES
Adopt Resolution Approving City Participation and Table Sponsorship at the Police Chief's Black-Tie Ball, A Night Among Heroes, by Manteca Police Chief's Foundation on November 1, 2025, in Manteca, California
4.7 RATIFY EMERGENCY SERVICE CONTRACTS WITH CLEAN HARBORS ENVIRONMENTAL SERVICES, INC., MP ENVIRONMENTAL SERVICES, INC., AND UTILITY SERVICE COMPANY, INC., FOR THE BACKWASH
TANK AT THE LOUISE AVENUE WATER TREATMENT FACILITY
Adopt Resolution to Ratify Emergency Service Contracts with Clean Harbors Environmental Services, Inc., MP Environmental Services, Inc., and Utility Service Company, Inc., for the Backwash Tank at the Louise Avenue Water Treatment Facility
4.8 ADOPT IWRMP AMENDMENTS TO THE WATER, WASTEWATER, AND RECYCLED WATER MASTER PLANS (PW 22-19 AND WW 22-24) AND
CEQA DETERMINATION
Adopt Resolution to Approve the Integrated Water Resources Master Plan Amendments to the Water, Wastewater, and Recycled Water Master Plans (PW 22-19 and WW 22-24), and to Approve an Addendum to the City of Lathrop Integrated Water Resources Master Plan Environmental Impact Report in Accordance with CEQA Guidelines Sections 15162 and 15164
4.9 APPROVE PURCHASE OF NINE (9) FLEET VEHICLES FROM MANTECA FORD-MERCURY, INC.
Adopt Resolution to Approve the Purchase of Nine (9) Fleet Vehicles from Manteca Ford-Mercury, Inc.
6 October 13, 2025 Lathrop City Council Regular Meeting Agenda Page 6
4.10 APPROVE TITLE VI OF THE CIVIL RIGHTS ACT OF 1964
IMPLEMENTATION PLAN FOR THE CITY OF LATHROP
Adopt Resolution to Approve a Title VI Non-Discrimination Policy Implementation Plan in Compliance with the Civil Rights Act of 1964 for the City of Lathrop
4.11 APPROVE CONTRACT CHANGE ORDER NO. 1 WITH GSE CONSTRUCTION COMPANY, INC., FOR CTF PHASE 4 EXPANSION, CIP WW 25-26 AND
APPROVE INTERFUND LOAN AGREEMENT AND CORRESPONDING
BUDGET AMENDMENT
1. Adopt Resolution to Find that an Emergency Exists,
Approve CCO No. 1 with GSE Construction Company, Inc.
for CTF Phase 4 Expansion, CIP WW 25-26 and Approve
Budget Amendment
2. Adopt Resolution to Approve an Interfund Loan from the Water Fund (5620) to the Wastewater (Funds 6010, 6080,
and 6030) to Fund Capital Improvement Projects (6090),
and Authorize Immediate Funding for the Procurement and Installation of the Phase 4 Headworks Assembly
4.12 APPROVE AGREEMENT WITH ALISTO ENGINEERING GROUP, INC., TO
PROVIDE PROFESSIONAL ENGINEERING CONSULTING SERVICES FOR
THE MOSSDALE WASTEWATER PUMP STATION ACCESS
MODIFICATIONS AND UPGRADES PROJECT, CIP WW 26-09
Adopt Resolution to Approve an Agreement with Alisto Engineering Group, Inc., to Provide Professional Engineering Consulting Services for the Mossdale Wastewater Pump Station Access Modifications and Upgrades Project, CIP WW 26-09
4.13 ACCEPT PUBLIC IMPROVEMENTS CONSTRUCTED BY ARROW DRILLERS INC., FOR CONSTRUCTION OF GOLDEN VALLEY PARKWAY AND SADLER OAK DRIVE FIBER OPTIC EXTENSION, CIP GG 22-03
Adopt Resolution to Accept Public Improvements Constructed by Arrow Drillers, Inc., for Golden Valley Parkway and Sadler Oak Drive Fiber Optic Extension, CIP GG 22-03 and Authorize the Filing of a Notice of Completion, Release of Contract Retention, and Release of Performance and Payment Bonds
4.14 ACCEPT PUBLIC IMPROVEMENTS CONSTRUCTED BY DSS COMPANY DBA
KNIFE RIVER CONSTRUCTION FOR LOUISE AVENUE AND MCKINLEY AVENUE INTERSECTION IMPROVEMENTS, CIP PS 15-02 AND APPROVE
PROJECT BUDGET AMENDMENT
Adopt Resolution to Accept Public Improvements Constructed by DSS Company dba Knife River Construction for Louise Avenue and McKinley Avenue, CIP PS 15-02, Authorize the Filing of a Notice of Completion, Release of Contract Retention Release of Performance and Payment Bonds, and Approve Project Budget Amendment
7 October 13, 2025 Lathrop City Council Regular Meeting Agenda Page 7
4.15 ACCEPT PUBLIC IMPROVEMENTS CONSTRUCTED BY DSS COMPANY DBA
KNIFE RIVER CONSTRUCTION FOR CONSTRUCTION OF BULBOUTS ON 5TH STREET, CIP PS 25-16
Adopt Resolution to Accept Public Improvements Constructed by DSS Company dba Knife River Construction for Bulbouts on 5th Street, CIP PS 25-16, and Authorize the Filing of a Notice of Completion, Release of Contract Retention, and Release of Performance and Payment Bonds
4.16 CREATE MISSIONARY MINNIE LEE COTTON PARK RESTROOM PROJECT, CIP PK 26-21 AND APPROVE BUDGET AMENDMENT
Adopt Resolution Creating Missionary Minnie Lee Cotton Park Restroom Project, CIP PK 26-21 and Approve Budget Amendment
RIVER ISLANDS DEVELOPMENT CONSENT ITEMS
4.17 APPROVE A PUBLIC INFRASTRUCTURE CREDIT AND REIMBURSEMENT AGREEMENT WITH RIVER ISLANDS DEVELOPMENT, LLC., AND CALIFIA, LLC., RELATING TO THE RIVER ISLANDS PROJECT
Adopt Resolution to Approve a Public Infrastructure Credit and Reimbursement Agreement with River Islands Development, LLC., and Califia, LLC., relating to the River Islands Project
4.18 APPROVE FINDING FOR 200-YEAR URBAN LEVEL OF FLOOD
PROTECTION FOR THE RIVER ISLANDS PROJECT
Adopt Resolution to Approve Finding for 200-Year Urban Level of Flood Protection for the River Islands Project within Island Reclamation District No. 2062
4.19 APPROVE FINAL MAP, CFD ANNEXATION, IRREVOCABLE OFFER OF DEDICATION, AND SUBDIVISION IMPROVEMENT AGREEMENT FOR 38 LOTS IN TRACT 4207 VILLAGE 44 UNIT 1 WITHIN LAKE HARBOR WEST
DISTRICT OF RIVER ISLANDS
Adopt Resolution to Approve Final Map for Tract 4207 Village 44 Unit 1 within the Lake Harbor West District, Totaling 38 Lots, Annexation into CFD 2023-1, an Irrevocable Offer of Dedication, and a Subdivision Improvement Agreement with River Islands Development Area 1, LLC
4.20 APPROVE FINAL MAP AND SUBDIVISION IMPROVEMENT AGREEMENT FOR 73 LOTS IN TRACT 4224 VILLAGE 6 UNIT 2 WITHIN WOODLANDS
EAST DISTRICT OF RIVER ISLANDS
Adopt Resolution to Approve Final Map for Tract 4224 Village 6 Unit 2 within the Woodlands East District, Totaling 73 Lots and a Subdivision Improvement Agreement with River Islands Development Area 3, LLC
4.21 APPROVE FINAL MAP AND SUBDIVISION IMPROVEMENT AGREEMENT FOR 32 LOTS IN TRACT 4232 VILLAGE 26 UNIT 2 WITHIN WEST
VILLAGE DISTRICT OF RIVER ISLANDS
8 October 13, 2025 Lathrop City Council Regular Meeting Agenda Page 8 Adopt Resolution to Approve Final Map for Tract 4232 Village 26 Unit 2 within the West Village District, Totaling 32 Lots and a Subdivision Improvement Agreement with River Islands Development Area 1, LLC
4.22 APPROVE FINAL MAP AND SUBDIVISION IMPROVEMENT AGREEMENT FOR 60 LOTS IN TRACT 4245 VILLAGE 28 UNIT 2 WITHIN WEST
VILLAGE DISTRICT OF RIVER ISLANDS
Adopt Resolution to Approve Final Map for Tract 4245 Village 28 Unit 2 within the West Village District, Totaling 60 Lots and a Subdivision Improvement Agreement with River Islands Development Area 1, LLC
5. SCHEDULED ITEMS
5.1 PUBLIC HEARING (PUBLISHED NOTICE) TO CONSIDER AMENDMENTS TO SECTION 12.04.010 AND SECTION 12.20.010 OF THE LATHROP
MUNICIPAL CODE (LMC)
City Council to Consider the Following:
1. Hold a Public Hearing; and
2. First Reading and Introduction of an Ordinance to Amend the Lathrop Municipal Code (LMC) Section 12.04.010 “Definitions” to Add Special Use Permit Definition and Section 12.20.010 “Conduct in City Parks - Prohibited Actions” to Clarify When a Special Use Permit is Required
5.2 REVIEW AND CONSIDER TRAFFIC CONTROL OPTIONS FOR RIVER
ISLANDS PARKWAY AT THE INTERSECTIONS OF BOSCH AVENUE AND
IMPERIAL DRIVE
Council to Consider Traffic Control Options for River Islands Parkway at the Intersections of Bosch Avenue and Imperial Drive
5.3 REVIEW AND CONSIDER OPTIONS FOR TRAFFIC SAFETY ON SPARTAN
WAY, CREATE SPARTAN WAY TRAFFIC SAFETY ENHANCEMENTS, CIP PS 26-20, AND APPROVE BUDGET AMENDMENT
Adopt Resolution to Create Spartan Way Traffic Safety Enhancements, CIP PS 26-20, and Approve Budget Amendment
6. COUNCIL COMMUNICATIONS
6.1 COUNCILMEMBER DIALLO REFERRAL - Discuss and Request Creating a 2x2 Committee between the City of Lathrop and San Joaquin County Sheriff’s Office for Matters Related to a Proposed Memorandum of Understanding Regarding Jurisdictional Waterways in Lathrop
6.2 COUNCILMEMBER DRESSER REFERRAL – Discuss and Request Project for Street Pavement Repairs on 7th Street in Front of the Post Office
6.3 COUNCILMEMBER DRESSER REFERRAL – Discuss and Request Red Light Violation Cameras at Multiple Intersections
9 October 13, 2025 Lathrop City Council Regular Meeting Agenda Page 9
6.4 MAYOR & COUNCILMEMBER COMMITTEE REPORT(S)
• Central Valley Executive Committee/LOCC (Akinjo/Diallo) • SJ Co. Council of Governments (Akinjo/Diallo)
• SJ Co. Council of Governments Executive Committee (Akinjo) • Integrated Waste Management Task Force (Dresser/Torres-O’Callaghan) • Reclamation District 17 Joint Powers Authority (Salvatore) • San Joaquin Partnership Board of Directors (Salvatore) • San Joaquin County Commission on Aging (Vacancy)
• San Joaquin Valley Air Pollution Control District (Dresser/Akinjo) • SJ Co. Water Advisory Board (Torres-O’Callaghan/Lazard) • Tri Valley-San Joaquin Valley Regional Rail Authority (Akinjo) • San Joaquin Area Flood Control Agency (Dresser/Lazard/Torres-O’Callaghan) • Ava Community Energy (Diallo/Dresser)
• Local Agency Formation Commission (LAFCo) (Diallo)
6.5 MAYOR & COUNCILMEMBER COMMENT(S)
7. ADJOURNMENT
/Teresa Vargas/
Teresa Vargas, MMC
Government Services Director
City Clerk
10 ITEM 4. 2
CITY OF LATHROP
CITY COUNCIL REGULAR MEETING
MONDAY, AUGUST 11, 2025, 7: 00 P. M.
CLOSED SESSION, 6: 15 P. M.
COUNCIL CHAMBER, CITY HALL
390 Towne Centre Drive
Lathrop, CA 95330
MINUTES
PLEASE NOTE: There was a Closed Session, which commenced at 6: 15 a. m. The Regular Meeting was reconvened at 7: 05 a. m.
1. PRELIMINARY
1. CALL TO ORDER - Mayor Akinjo called the meeting to order at 6: 15 p. m. and adjourned to closed session.
1. 2 CLOSED SESSION
1.2. LIABILITY CLAIM: Pursuant to CA Government Code Section 54956. 95:
Claimant: Ayden Horn
Agency Claimed Against: City of Lathrop
1. 2. PUBLIC EMPLOYEE PERFORMANCE EVALUATION: Pursuant to Government Code Section 54957
City Attorney
City Manager
RECONVENE — Mayor Akinjo reconvened the meeting at 7: 05 p. m.
1. 2.3 REPORT FROM CLOSED SESSION
City Attorney Salvador Navarrete reported that there was no action taken on Item 1.2.. Mayor Akinjo reported that there was no action taken on Item 1. 2.
1. 3 ROLL CALL
Present: Mayor Akinjo; Vice Mayor Torres - O' Callaghan; and Councilmembers: Dresser and Lazard.
Absent: Councilmember Diallo.
1. 4 INVOCATION - Pastor Luis Jara, Home Church, provided the invocation.
1. 5 PLEDGE OF ALLEGIANCE - Pastor Jara led the pledge of allegiance.
August 11, 2025 Lathrop City Council Regular Meeting Minutes Page 1 11 1. 6 ANNOUNCEMENT( S) BY MAYOR / CITY MANAGER
City Engineer Brad Taylor provided information regarding the upcoming Roth Road closure at Union Pacific Railroad crossing west of Airport Road, scheduled for Friday, August 22, 2025, at 7 a. m. through Monday, August 25, 2025, at 5 p. m.
1. 7 INFORMATIONAL ITEM( S) - None
1. 8 DECLARATION OF CONFLICT( S) OF INTEREST
Councilmember Lazard declared a conflict of interest with Item 4. 21, due to her employment with Dell' Osso Farms.
2. PRESENTATIONS - None
3. CITIZEN' SFORUM
There were no speakers for Citizens Forum.
4. CONSENT CALENDAR
On a motion by Vice Mayor Torres -O' Callaghan, seconded by Councilmember Dresser, the City Council approved the Consent Calendar, Items 4. 1 through
4. 20, by the following roll call vote, unless otherwise indicated:
Ayes: Dresser, Lazard, Torres -O' Callaghan and Akinjo
Noes: None
Absent: Diallo
Abstain: None
4. 1 WAIVING OF READING OF ORDINANCES AND RESOLUTIONS
Waived the reading in full of ordinances and resolutions on agenda and adopted by reading of title only, unless otherwise requested by the Mayor or a Councilmember.
4. 2 APPROVAL OF MINUTES
Approved Minutes for the Regular City Council Meeting of June 9, 2025, and the Special City Council Meeting of June 23, 2025 ( at 1: 30 p. m.).
4. 3 FIXED ROUTE FARE FREE PILOT PROGRAM FOR LATHROP TRANSIT Pulled by Councilmember Dresser. A question and answer period ensued. Deputy City Manager Thomas Hedegard and City Manager Stephen Salvatore provided additional information.
August 11, 2025 Lathrop City Council Regular Meeting Minutes Page 2 12 Adopted Resolution 25- 5850 approving Fixed Route Fare Free Pilot Program for Lathrop Transit through December 31, 2025.
4. APPLY FOR DIRECT RECIPIENT STATUS WITH THE FEDERAL TRANSIT
ADMINISTRATION ( FTA) FOR FTA FUNDING
Adopted Resolution 25- 5851 authorizing the City Manager, or his designee, to apply for direct recipient status with the Federal Transit Administration ( FTA) and to execute any necessary grant applications, agreements and certifications and assurances necessary to obtain direct recipient status, subject to legal review and approval.
4. 5 APPROVE WRITE- OFF OF UNCOLLECTIBLE UTILITY AND
MISCELLANEOUS CUSTOMER ACCOUNTS FOR FISCAL YEAR 2024-5
Adopted Resolution 25- 5852 approving write- off of uncollectible utility and miscellaneous accounts for Fiscal Year ( FY) 2024-5.
4. 6 APPROVE AN UPDATE TO CENTRAL SAN JOAQUIN VALLEY RISK
MANAGEMENT AUTHORITY JOINT POWERS AGREEMENT, AS AMENDED JULY 1, 2025
Adopted Resolution 25- 5853 approving Amendment to the Joint Power Agreement of the Central San Joaquin Valley Risk Management Authority as Amended July 1, 2025.
4. 7 APPROVE PURCHASE OF TWO ( 2) POOL VEHICLES FROM ELK GROVE
TOYOTA FOR THE CITY MANAGER AND CITY ATTORNEY DEPARTMENTS Adopted Resolution 25- 5854 approving the purchase of two ( 2) pool vehicles from Elk Grove Toyota for the City Manager and City Attorney Departments.
4. 8 APPROVE AGREEMENT TO PROVIDE LAW ENFORCEMENT SERVICES FOR THE AMERICAN HEART ASSOCIATION' S209 HEART & STROKE WALK EVENT
Adopted Resolution 25- 5855 approving Agreement to provide law enforcement services to the American Heart Association for the 209 Heart & Stroke Walk Event on September 13, 2025.
4. 9 APPROVE JUDITH BLUMHORST AS A PUBLIC MEMBER TO THE
MOSSDALE TRACT ENHANCED INFRASTRUCTURE FINANCING
DISTRICT' SPUBLIC FINANCING AUTHORITY
Adopted Resolution 25- 5856 approving Judith Blumhorst as a Public Member to the Mossdale Tract Enhanced Infrastructure Financing District' sPublic Financing Authority.
August 11, 2025 Lathrop City Council Regular Meeting Minutes Page 3 13 4. 10 RATIFY CITY MANAGER' SAPPROVAL OF OUT OF STATE TRAVEL TO GOODYEAR, ARIZONA ON JULY 30, 2025, FOR THE SENIOR
CONSTRUCTION MANAGER TO EVALUATE WASTEWATER TREATMENT
FACILITY
Adopted Resolution 25- 5857 ratifying City Manager' sapproval of out of state travel to Goodyear, Arizona on July 30, 2025, for the Senior Construction Manager to evaluate their Wastewater Treatment Facility.
4. 11 APPROVE OUT OF STATE TRAVEL TO ATTEND THE 2025 SAN JOAQUIN
AREA FLOOD CONTROL AGENCY ( SJAFCA) ADVOCACY TRIP IN
WASHINGTON, D. C.
Adopted Resolution 25- 5858 authorizing out of state travel for the City Manager to represent the City of Lathrop on the SJAFCA Board of Directors at the 2025 Advocacy Trip to Washington, D. C., September 15-7, 2025.
4. 12 APPROVE AMENDMENTS TO THREE ( 3) MASTER PROFESSIONAL CONSULTING SERVICE AGREEMENTS TO 4LEAF, INC., BPR
CONSULTING GROUP LLC., AND TRB AND ASSOCIATES, INC., AND APPROVE THREE ( 3) TASK ORDERS FOR EACH, TO PROVIDE PLAN
REVIEW SERVICES, BUILDING INSPECTION SERVICES, AND
PERMITTING SERVICES TO THE BUILDING DEPARTMENT
Adopted Resolution 25- 5859 approving Amendments to three ( 3) Master Professional Consulting Service Agreements to 4LEAF, Inc., BPR Consulting Group LLC., and TRB and Associates, Inc., and approving three ( 3) Task Orders for each, to provide plan review services, building inspection services, and permitting services to the Building Department.
4. 13 APPROVE CONSTRUCTION CONTRACT WITH NORGO ENGINEERING, INC., FOR THE CONSTRUCTION OF CHRISTOPHER WAY PIPELINE
MAINTENANCE AND APPROVE BUDGET AMENDMENT
Adopted Resolution 25- 5860 approving Construction Contract with Norgo Engineering, Inc., for Christopher Way Pipeline Maintenance, and approving related budget amendment.
4. 14 APPROVE CONSTRUCTION CONTRACT WITH CONSOLIDATED
ENGINEERING, INC., FOR THE CONSTRUCTION OF TESLA DRIVE AND CHRISTOPHER WAY PAVEMENT REHABILITATION, CIP PS 24- 05
Adopted Resolution 25- 5861 approving Construction Contract with Consolidated Engineering, Inc., for the construction of Tesla Drive and Christopher Way pavement rehabilitation, CIP PS 24- 05.
4. 15 APPROVE TASK ORDER NO. 1 WITH ENGEO, INC. FOR CONSTRUCTION ENGINEERING SERVICES FOR CTF PHASE 4 EXPANSION, CIP WW25- 26 August 11, 2025 Lathrop City Council Regular Meeting Minutes Page 4 14 Adopted Resolution 25- 5862 approving Task Order No. 1 with ENGEO Inc. for construction engineering services for CTF Phase 4 Expansion Project, CIP WW 25-6.
4. 16 AUTHORIZE THE CITY MANAGER TO EXECUTE MASTER AGREEMENTS
AND PROGRAM SUPPLEMENT AGREEMENTS WITH THE CALIFORNIA
DEPARTMENT OF TRANSPORTATION ( CALTRANS) FOR
REIMBURSEMENT OF STATE AND FEDERAL FUNDING PROJECTS AND
AUTHORIZE THE CITY ENGINEER TO EXECUTE RIGHT- OF- WAY
CERTIFICATIONS
Adopted Resolution 25- 5863 authorizing the City Manager to execute Master Agreements and Program Supplement Agreements with the California Department of Transportation ( Caltrans) for State and Federal funding projects and authorizing the City Engineer to execute Right -of - Way Certifications.
4. 17 RATIFY THE PURCHASE OF CORE TECHNOLOGY LICENSING WITH INSIGHT PUBLIC SECTOR INC.
Adopted Resolution 25- 5864 ratifying the purchase of Core Technology Licensing with Insight Public Sector Inc.
4. 18 ACCEPT PUBLIC IMPROVEMENTS CONSTRUCTED BY MG & JC CONCRETE, INC., FOR TOWNE CENTRE DRIVE RAISED CROSSWALK, CIP PS 24- 07
Adopted Resolution 25- 5865 accepting public improvements constructed by MG & JC Concrete, Inc., for the Towne Centre Drive Raised Crosswalk Project, CIP PS 24- 07, authorizing the filing of a Notice of Completion, approving releasing of contract retention, and releasing of Performance and Payment Bonds.
4. 19 ACCEPT PUBLIC IMPROVEMENTS CONSTRUCTED BY SIERRA TRAFFIC MARKINGS, INC., FOR STRIPING IMPROVEMENTS, CIP PS 25- 18 Adopted Resolution 25- 5866 accepting public improvements constructed by Sierra Traffic Markings, Inc., for the Striping Improvements Project, CIP PS 25- 18, authorizing the filing of a Notice of Completion, approving releasing of contract retention, and releasing of Performance and Payment Bonds.
4. 20 RATIFY CITY MANAGER' SEXECUTION OF AMENDMENT NO. 1 TO THE
AGREEMENT BETWEEN THE CITY OF LATHROP AND BLACK WATER
CONSULTING ENGINEERS TO PROVIDE ENGINEERING DESIGN
SERVICES FOR MCKINLEY AVE FORCE MAIN INTERTIE, CIP WW 25-3 August 11, 2025 Lathrop City Council Regular Meeting Minutes Page 5 15 Adopted Resolution 25- 5867 ratifying City Manager' s execution of
Amendment No. 1 to the Agreement between the City of Lathrop and Black Water Consulting Engineers to provide engineering design services for the Mckinley Avenue Force Main Intertie, CIP WW 25-3.
RIVER ISLANDS DEVELOPMENT CONSENT ITEMS
Councilmember Lazard recused herself at 7: 24 p. m., following the vote of the consent calendar, prior to the vote of Item 4. 21, due to declared conflict of interest as noted on Item 1. 8.
On a motion by Vice Mayor Torres -O' Callaghan, seconded by Councilmember Dresser, the City Council approved the River Islands Consent Item 4. 21, by the following roll call vote, unless otherwise indicated:
Ayes: Dresser, Torres -O' Callaghan and Akinjo
Noes: None
Absent: Diallo
Abstain: Lazard
4. 21 ACCEPTANCE OF ROLL TIDE WAY AND WINTON AVENUE IN TRACT 4149
FROM RIVER ISLANDS
Adopted Resolution 25- 5868 accepting Roll Tide Way and Winton Avenue in Tract 4149 from the River Islands Development and approving the release of Performance and Labor & Materials Bonds.
5. SCHEDULED ITEMS
Councilmember Lazard returned to the dais at 7: 26 p. m.
5. 1 PUBLIC HEARING ( PUBLISHED NOTICE) TO CONSIDER GENERAL PLAN AMENDMENT NO. GPA- 22-3, REZONE NO. 22-4, SPECIFIC PLAN NO.
SPA -22-5, VESTING TENTATIVE SUBDIVISION MAP NO. VTM- 22-7, AND WILLIAMSON ACT CANCELLATION NO. AGC- 22-8 FOR THE
MOSSDALE LANDING WEST PROJECT
Community Development Director Rick Caguiat and Planning Consultant David Niskanen with JB Anderson Planning provided the presentation. A question and answer period ensued throughout the presentation. City Engineer Brad Taylor provided additional project information.
Mayor Akinjo opened the public hearing. Trevor Smith ( in -person speaker), spoke on behalf of the applicant, and provided additional project details. John Harris ( in - person speaker) expressed concerns with the project. Armando Valerio ( in -person speaker) expressed concerns with the project. Ya Yang ( in -person speaker) expressed the need of additional schools to support the development area. There were no other speakers. Mayor Akinjo closed the public hearing.
August 11, 2025 Lathrop City Council Regular Meeting Minutes Page 6 16 On a motion by Vice Mayor Torres -O' Callaghan, seconded by Councilmember Lazard, the City Council considered the following:
1. Held a Public Hearing;
2. Adopted Resolution 25- 5869 certifying the Final
Environmental Impact Report ( FEIR) (SCH # 2024030835), CEQA Findings of Fact, Statement of Overriding
Considerations, and Mitigation Measures/ Monitoring Plan for the Mossdale Landing West Project;
3. Adopted Resolution 25- 5870 approving a General Plan Amendment of the subject properties to LD, Low Density
Residential, P, Park, and OS, Open Space;
4. Introduced and conducted first reading of an ordinance for the Mossdale Landing West Specific Plan;
5. Introduced and conducted first reading of an ordinance for Zoning Map Amendment to RL- MV, Low Density
Residential, P - MV, Park, and OS - MV, Open Space and
Zoning Text Amendments related to the Mossdale Landing
West Project;
6. Adopted Resolution 25- 5871 approving a Vesting
Tentative Subdivision Map No. 4146 to subdivide the
subject properties into 829 single- family residential lots, a Neighborhood Park, Linear Park, open space areas, and
major roadway improvements for the Mossdale Landing
West Project; and
7. Adopted Resolution 25- 5872 approving findings related to tentative approval of cancellation of California Land Conservation Contract Number 73- C1- 73 on specified
property, by the following roll call vote, unless otherwise indicated:
Ayes: Dresser, Lazard, Torres -O' Callaghan and Akinjo
Noes: None
Absent: Diallo
Abstain: None
5. 2 PUBLIC HEARING ( PUBLISHED NOTICE) TO CONSIDER ADOPTION OF A
RESOLUTION OF NECESSITY TO ACQUIRE REAL PROPERTY LOCATED AT 134 ROTH ROAD OWNED BY INDERPAL SINGH ( APN 196- 020-4) BY
EMINENT DOMAIN
City Engineer Brad Taylor provided the presentation. A question and answer period followed the presentation. City Attorney Salvador Navarrete provided additional project information.
Mayor Akinjo opened the public hearing. Unidentified speaker ( named as " iphone user") via zoom was not able to connect; several attempts were made to allow them to connect; there was no sound/ voice.
August 11, 2025 Lathrop City Council Regular Meeting Minutes Page 7 17 Armando Valerio ( in - person speaker) expressed concern with potential traffic congestion within the area. There were no other speakers. Mayor Akinjo closed the public hearing.
On a motion by Mayor Akinjo, seconded by Councilmember Dresser, the City Council considered the following:
1. Held a Public Hearing; and
2. Adopted Resolution 25- 5873 approving a Resolution of Necessity of the City of Lathrop to Acquire Real Property in Connection with the Harlan Road Realignment, CIP PS 14- 04; Make Findings and Determinations; and Authorize
Eminent Proceedings ( 134 Roth Road owned by Inderpal
Singh, APN 196- 020-4) by the following roll call vote, unless otherwise indicated:
Ayes: Dresser, Lazard and Akinjo
Noes: Torres -O' Callaghan
Absent: Diallo
Abstain: None
5. 3 PUBLIC HEARING ( PUBLISHED NOTICE) TO CONSIDER AN ORDINANCE TO AMEND THE SPEED LIMITS IN THE CITY OF LATHROP, TITLE 10 VEHICLES AND TRAFFIC, CHAPTER 10. 08 SPEED LIMITS, SECTION
10. 08.30 SPEED LIMITS OF THE LATHROP MUNICIPAL CODE
City Engineer Brad Taylor provided the presentation. A question and answer period ensued throughout the presentation. Mayor Akinjo opened the public hearing. Armando Valerio ( in -person speaker) commented on electric bikes. Troy Mouton expressed concerns with speeding within his residential community on Oberlin Avenue. There were no other speakers. Mayor Akinjo closed the public hearing.
On a motion by Vice Mayor Torres -O' Callaghan, seconded by Councilmember Lazard, the City Council consider the following:
1. Held a Public Hearing; and
2. Introduced and held first reading of an ordinance of the City Council of the City of Lathrop amending Section
10. 08.30 "Speed Limits" of the Lathrop Municipal Code.
Ayes: Dresser, Lazard, Torres - O' Callaghan and Akinjo Noes: None
Absent: Diallo
Abstain: None
5. 4 APPOINTMENT OF VOTING DELEGATE/ ALTERNATE FOR THE 2025
LEAGUE OF CALIFORNIA CITIES ANNUAL CONFERENCE
August 11, 2025
Government Services Director / City Clerk Teresa Vargas provided the presentation. A question and answer period followed.
Lathrop City Council Regular Meeting Minutes Page 8
18 Council consensus directed the City Clerk to register Mayor Akinjo as the appointed Voting Delegate, and Vice Mayor Torres -O' Callaghan and Councilmember Diallo as Voting Alternates, during the 2025 League of California Cities Annual Conference, October 8- 10, 2025, at the Long Beach Convention Center.
6. COUNCIL COMMUNICATIONS
6. 1 MAYOR & COUNCILMEMBER COMMITTEE REPORT( S) - None.
Mayor Akinjo reported his attendance at the National Black Caucus of Local Elected Officials ( NBC - LEO) 2025 Summer Conference.
6. 2 MAYOR & COUNCILMEMBER COMMENT( S)
Councilmember Dresser made several comments related to the decorative arches on 5th Street; traffic calming on new and old Harlan Road intersections; and encouraging attendance at National Night Out events. Councilmember Lazard expressed appreciation to staff for recent city events. Vice Mayor Torres -O' Callaghan requested information regarding the Louise and I-5 diverging diamond; expressed concern with increase of mosquitoes in public park areas. Mayor Akinjo commented on public safety and expressed appreciation to staff. City Manager Stephen Salvatore reminded the public to attend the 2025 Animal Center Olympics Event, scheduled for August 16, 2025, at 9 a. m. at Dog Park located on Inland Passage.
7. ADJOURNMENT — There being no further business, Mayor Akinjo adjourned the meeting at 8: 41 p. m.
1/
resa Vargas, MMC
overnment Services Director
City Clerk
August 11, 2025 Lathrop City Council Regular Meeting Minutes Page 9 19 PAGE LEFT
INTENTIONALLY
BLANK
20 ITEM 4. 3
CITY MANAGER' SREPORT
OCTOBER 13, 2025 CITY COUNCIL REGULAR MEETING
ITEM: SECOND READING AND ADOPTION OF ORDINANCE
25- 472 OF THE CITY COUNCIL OF THE CITY OF
LATHROP TO AMEND TITLE 15 " BUILDINGS AND
CONSTRUCTION" TO INCORPORATE THE 2025
CALIFORNIA BUILDING STANDARDS INTO THE
LATHROP MUNICIPAL CODE
RECOMMENDATION: Waive Full Reading and Adopt Ordinance 25- 472 to Amend Title 15 " Buildings and Construction" to
Incorporate the 2025 California Building Standards
into the Lathrop Municipal Code
RECOMMENDED ACTION:
The City Council to conduct a second reading and adopt Ordinance 25- 472 entitled:
AN ORDINANCE OF THE CITY COUNCIL OF THE CITY OF LATHROP TO AMEND TITLE 15 " BUILDINGS AND CONSTRUCTION" TO INCORPORATE THE 2025 CALIFORNIA
BUILDING STANDARDS INTO THE LATHROP MUNICIPAL CODE
SUMMARY:
On September 8, 2025, the City Council approved the introduction and first reading of the subject Ordinance by the following vote:
AYES: Diallo, Dresser, Lazard, Torres -O' Callaghan, and Akinjo NOES: None
ABSTAIN: None
ABSENT: None
The Ordinance will take effect 30 days after adoption.
SUBMITTED BY:
resa Vargas, City Cle Date
21 ORDINANCE NO. 25- 472
AN ORDINANCE OF THE CITY COUNCIL OF THE CITY OF LATHROP TO AMEND TITLE 15 " BUILDINGS AND CONSTRUCTION" TO INCORPORATE THE 2025
CALIFORNIA BUILDING STANDARDS INTO THE LATHROP MUNICIPAL CODE EFFECTIVE JANUARY 1, 2026
WHEREAS, Chapter 4 of Part 2. 5 of Division 13 of the California Health and Safety Code, commencing with Section 18935, establishes a process for the California Building Standards Commission to develop, adopt and implement a statewide California Building Standards Code; and
WHEREAS, Section 17922 of the California Health and Safety Code provides that such standards shall be adopted by reference except for any additions made by the State Department of Housing and Community Development and shall impose substantially the same requirements as uniform codes identified in subdivision ( a) of Section 17922; and
WHEREAS, subdivision ( c) of Section 17922 of the California Health and Safety Code provides that local use zone requirements, local fire zones, building setback, side and rear yard setback requirements and property line requirements are left entirely to local jurisdictions; and
WHEREAS, Section 17958. 5of the California Health and Safety Code provides that except for certain noise standards set forth in Section 17922. 6, a city may change the requirements of the California Building Standards Code including, but not limited to, green building standards as it determines are reasonably necessary based on local climatic, geological or topological conditions but only pursuant to Section 17958. 7; and
WHEREAS, pursuant to Section 17958. 7of the California Health and Safety Code, a city may make such local changes but only if it makes the express findings regarding local climatic, geological or topographical conditions and files same with the California Building Standards Commission; and
WHEREAS, administrative amendments and amendments to provisions not regulating buildings used for human habitation do not require findings; and WHEREAS, this Ordinance contains no such findings regarding climatic, geological and/ ortopographical conditions; and
WHEREAS, the City Clerk will file this Ordinance and findings with the California Building Standard Commission after adoption; and WHEREAS, this Ordinance is exempt to CEQA review because pursuant to subdivision ( b) (3) of Section 15061 of the CEQA Guidelines ( 14 CCR 15061), CEQA applies only to projects which have the potential for causing a significant effect on the environment; and
Ordinance No. 25- 472
22 WHEREAS, because the adoption of this Ordinance does not have a significant effect on the environment, this Ordinance is within exemption of CEQA.
NOW, THEREFORE, BE IT ORDAINED that the City Council of the City of Lathrop does hereby approve amendments to Title 15 (" Building and Construction") of the Lathrop Municipal Code, as follows:
Section 1. On January 1, 2026, Chapters 15. 00, 15. 02, 15. 04, 15. 06, 15. 08,
15.0, 15.2, 15.4, 15. 18, 15. 20, 15. 22, 15. 24, of the City of Lathrop Municipal Code are hereby amended as shown in Exhibits A -L.
Section 2. Duty of Care. This Ordinance is not intended to and shall not be construed or given effect in a manner that imposes upon the City or any officer or employee thereof a mandatory duty of care toward persons and property within or without the City so as to provide a basis of civil liability for damages, except as otherwise imposed by law.
Section 3. Severability. If any section, subsection, phrase, or clause of this ordinance is for any reason held to be unconstitutional, such decision shall not affect the validity of the remaining portions of this ordinance. The City Council hereby declares that it would have passed this ordinance and each section, subsection, phrase or clauses thereof irrespective of the fact that any one or more sections, subsections, phrases, or clauses be declared unconstitutional or invalidity of any sections, subsection, subdivision, paragraph, sentence, clause or phrase.
Section 4. Effective Date. This Ordinance shall take effect on the 1st day of January 2026 after passage thereof.
Section 5. Publication. This Ordinance shall be published in accordance with the provisions of Government Code Section 36933 of the Government Code.
Ordinance No. 25- 472
23 THIS ORDINANCE was introduced at a regular meeting of the City Council of the City of Lathrop on the 8th day of September 2025, and was PASSED AND ADOPTED at a regular meeting of the City Council of the City of Lathrop on the day of , 2025 by the following vote, to wit:
AYES:
NOES:
ABSENT:
ABSTAIN:
Paul Akinjo, Mayor
ATTEST: APPROVED AS TO FORM:
Teresa Vargas, City Clerk Salvador Navarrete, City Attorney Ordinance No. 25- 472
24 Language Removed will be shown in RED STRIKETHROUGH
Revised Language will be shown in BLUE UNDERLINE
Added Language will be shown in GREEN UNDERLINE
EXHIBIT A
Title 15. Buildings and Construction
Chapter 15. 00. SCOPE AND ADMINISTRATION ADOPTED
15. 00.10. Adoption by ( Reference.
In the " 2022 2025 California Building Code ( CBC)" (Part 2 of the Title 24 of the California Code of Regulations), Chapter 1, Division II —Scope and Administration is adopted by reference and shall apply to all the 2022 2025 California Building Standards Code and made part of the municipal code of the sCity of Lathrop as if fully set forth herein.
Ord. 25- § _)
15. 00.20. Application to cCity.
The name " 6City of Lathrop" is inserted in any and all blank spaces provided in the California Building Code and appendices for the name of the city adopting such code, and wherever the word " city" as "}jurisdiction" appears in the eCode or is otherwise used, it shall mean and refer to the GCity of Lathrop.
Ord. 25- § _)
15. 00.30. Omissions, aAmendments, and aAdditions to the 2022 2025 CBC.
Section 113 of the 2022 2025 California Building Standards Code ( Means of Appeals) as is adopted by the eCity of Lathrop be amended to read as follows:
Section 113 BOARD OF APPEALS
113. General. In order to hear and decide appeals of orders, decisions or determinations made by the Building Official relative to the application or interpretations of city of Lathrop Municipal Code, Title 15, there shall be and is hereby created a Building Life Safety Appeals Board, hereafter known also as the Local Appeals Board, consisting of members qualified by experience and/ ortraining as set forth in 15. 00. 130( C) 15. 00.30to pass upon matters pertaining to building construction, building service equipment, property maintenance, housing standards and fire regulations and who are not employees of the City. The Building Official shall be an ex officio member and shall act as secretary to the Local Appeals Board relative to appeals for the City of Lathrop Municipal Code, Title 15, except as to the Fire Code and the Fire Chief shall be an ex officio member and shall act as secretary to the bBoard relative to appeals for the Fire Code.
The Local Appeals Board shall be appointed by the City Manager. The Board may adopt rules of procedure for conducting its business and shall render all decisions in writing to the appellant with a duplicate copy to the Building Official or the Fire Chief as is appropriate. Appeals to the Local Appeals Board shall be processed in accordance with the provisions and procedures contained in Title 15 of this Code.
113. 2 Limitations on authority. An application for appeal shall be based on a claim that the true intent of this code or the rules legally adopted thereunder have been incorrectly 25 interpreted, the provisions of this code do not fully apply or an equally good equivalent or better form of construction is proposed. The board shall have no authority to waive requirements of this code.
113. 3 Qualifications. The Local Appeals Board shall consist of five individuals, one from each of the following:
1) A retired or currently active registered design professional with architectural or structural engineering experience or a builder or superintendent of building construction with at least ten years' experience, five of which shall have been in responsible charge of work. 2) A person with experience in dealing with the disabled community or who has been a community advocate for the disabled community or is a disabled person with a minimum of 5 years' experience in the area of disabled access requirements.
A retired or currently active registered design professional with mechanical and plumbing engineering experience or a mechanical contractor or a plumbing contractor with at least ten years' experience, five of which shall have been in responsible charge of work. 4) A retired or currently active registered design professional with electrical engineering experience or an electrical contractor with at least ten years' experience, five of which shall have been in responsible charge of work.
A retired or currently active registered design professional with fire protection engineering experience or a fire protection contractor with at least ten years' experience, five of which shall have been in responsible charge of work.
113. 4 Alternate members. The governing body shall appoint two alternate members who shall be called by the board chairperson to hear appeals during the absence or disqualification of a member. Alternate members shall possess the qualifications required for board membership. 113. 5 Chairperson. The board shall annually select one of its members to serve as chairperson. 113. 6 Disqualification of member. A member shall not hear an appeal in which that member has a personal, professional or financial interest.
113. 7 Appeals. Any person, firm or corporation may register an appeal with the Local Appeals Board for review of any decision of the Building Official about Title 15, provided that the Appeal is made in writing within 30 days of receipt of notice and is accompanied with the administrative fee specified in the City' sfee schedule for an appeal. All appeals where notices declaring structures or equipment " Dangerous" must be submitted within 10 days of receipt of notice. 113. 8 Conditions. Any person shall be permitted to appeal a decision of the Building Official or Fire Chief to the Local Appeals Board when it is claimed that any one more of the following conditions exists.
3)
5)
1) The true intent of Title 15, as described in those codes has been incorrectly interpreted.
2) A provision in Title 15 does not apply.
3) A decision is arbitrary as it applies to alternatives, new materials or interpretations of this Title 15.
Request for appeals action ratification. For the purposes of this chapter, " Request for Ratification" shall mean actions required under California Building Code Division I Section 1. 9.5. A written request by the Building Official that the Board approve a proposed solution based upon a finding of "unreasonable hardship" as that term is used in Title 24 of the California Code of Regulations. 4)
26 5) The Board must have approved a Request for Ratification, prior to the approval of plans or issuance of a permit, which requires a finding of unreasonable hardship from an appeal to the Building Official.
6) The Building Official shall place any appeal consisting of a request for ratification to determine an unreasonable hardship on the Board' sAgenda in compliance with provisions contained in 15. 00.10 15. 00.30. 113. 9Decisions. The Board shall not render any decision allowing a proposed design solution unless, after the hearing, it finds on the basis of substantial evidence that:
1) The proposed design is satisfactory and complies with the intent of this chapter; and 2) The proposed design meets the requirements of Title 24. 3) Board decisions overruling the Building Official' s decisions shall require four votes.
Board decisions ratifying the Building Official' srequests for ratification shall require three votes.
4) Should the Board render a decision contrary to that of the Building Official, then the decision of Board shall be deemed the decision of the Building Official or Fire Chief. 113.0 Decisions Findings and Order.
1) The decision of the Board shall be final and conclusive. 2) The findings and order of the Board shall include the following notice: Notice to Parties:
The time within which judicial review must be sought to review this decision is governed by the provisions of California Code of Civil Procedure Section 1094. 6.
Ord. 25- § _)
27 Language Removed will be shown in RED STRIKETHROUGH
Revised Language will be shown in BLUE UNDERLINE
Added Language will be shown in GREEN UNDERLINE EXHIBIT B Title 15. Buildings and Construction
Chapter 15. 02. CALIFORNIA ADMINISTRATIVE CODE
ADOPTED
15. 02.10. Title.
This title shall be known and may be cited as the " Lathrop Building Standards Code" or " LBSC." The Lathrop Building Standards Code consists of the California Building Standards Code, as codified in Title 24 of the California Code of Regulations.
Ord. 25- § _)
15. 02.20. Adoption by ( Reference
The " 2022 2025 California Administrative Code" (Part 1 of the Title 24 of the California Code of Regulations) is adopted by reference and made part of the municipal code of the GCity of Lathrop as if fully set forth herein.
Ord. 25- § _)
15. 02.30. Application to cCity.
The name " sCity of Lathrop" is inserted in any and all blank spaces provided in the California Building Code and appendices for the name of the city adopting such code, and wherever the word " city" as jurisdiction" appears in the GCode or is otherwise used, it shall mean and refer to the cCity of Lathrop.
Ord. 25- § _)
28 Language Removed will be shown in RED STRIKETHROUGH
Revised Language will be shown in BLUE UNDERLINE
Added Language will be shown in GREEN UNDERLINE
EXHIBIT C
Title 15. Buildings and Construction
Chapter 15. 04. CALIFORNIA BUILDING CODE ADOPTED
15. 04.10. Adoption by rReference.
A. The " 2022 2025 California Building Code (CBC)" (Part 2 of the Title 24 of the California Code of Regulations) is adopted by reference and made part of the municipal code of the GCity of Lathrop as if fully set forth herein.
B. Adoption of Certain 2022 2025 CBC Appendix Chapters. The following chapters and appendices of the 2022 2025 California Building Code are adopted by the city of Lathrop, as amended by Section 15. 04.30 of this chapter:
1. Appendix J ( Grading);
2. Appendix H ( Signs).
The remaining appendices are not adopted.
Ord. 25- § _)
15. 04.20. Application to GCity.
The name "- cCity of Lathrop" is inserted in any and all blank spaces provided in the California Building Code and appendices for the name of the city adopting such code, and wherever the word " city" as jurisdiction" appears in the sCode or is otherwise used, it shall mean and refer to the cCity of Lathrop.
Ord. 25- § _)
15. 04.30. Omissions, aAmendments, and aAdditions to the 2022 2025 CBC Appendix J.
Section J101 ( General) shall be amended as follows:
J101. 1 Scope. The provisions of this chapter apply to grading, excavation and earthwork construction, including sills and embankments in the City of Lathrop except in Reclamation District 2062. Where conflicts occur between the technical requirements of this chapter and the geotechnical report the geotechnical report shall govern.
Ord. 25- § _)
29 Language Removed will be shown in RED STRIKETHROUGH
Revised Language will be shown in BLUE UNDERLINE
Added Language will be shown in GREEN UNDERLINE
EXHIBIT D
Title 15. Buildings and Construction
Chapter 15. 06. CALIFORNIA RESIDENTIAL CODE
ADOPTED
15. 06.10. Adoption by rReference.
A. The "2022 2025 California Residential Code ( CRC)" (Part 2. 5 of the Title 24 of the California Code of Regulations) is adopted by reference and made part of the municipal code of the ° City of Lathrop as if fully set forth herein.
B. Adoption of Certain 2022 2025 CRC Appendix Chapters. The following chapters and appendices of the 2022 2025 California Residential Code are adopted by the ° City of Lathrop, as amended by Section 15. 06.30 of tiis chapter: in their entirety:
1. Appendix AH BF ( Patio Covers);
2. Appendix Ad BO ( Existing Buildings and Structures);
3. Appendix AK BG ( Sound Transmission).
The remaining appendices are not adopted.
Ord. 25- § _)
15. 06.20. Application to cCity.
The name "- cCity of Lathrop" is inserted in any and all blank spaces provided in the California Building Code and appendices for the name of the city adopting such code, and wherever the word " city" as jurisdiction" appears in the ° Code or is otherwise used, it shall mean and refer to the ° City of Lathrop.
Ord. 25- § _)
30 Language Removed will be shown in RED STRIKETHROUGH
Revised Language will be shown in BLUE UNDERLINE
Added Language will be shown in GREEN UNDERLINE
EXHIBIT E
Title 15. Buildings and Construction
Chapter 15. 08. CALIFORNIA ELECTRICAL CODE
ADOPTED
15. 08.10. Adoption by ( Reference.
The " 2022 2025 California Electrical Code ( CEC)" (Part 3 of the Title 24 of the California Code of Regulations) is adopted by reference and made part of the municipal code of the GCity of Lathrop as if fully set forth herein.
Ord. 25- § _)
15. 08.20. Application to GCity.
The name " GCity of Lathrop" is inserted in any and all blank spaces provided in the California Electrical Code for the name of the city adopting such code, and wherever the word " city" as " jurisdiction" appears in the ° Code or is otherwise used, it shall mean and refer to the eCity of Lathrop.
Ord. 25- § _)
31 Language Removed will be shown in RED STRIKETHROUGH
Revised Language will be shown in BLUE UNDERLINE
Added Language will be shown in GREEN UNDERLINE
EXHIBIT F
Title 15. Buildings and Construction
Chapter 15.0. CALIFORNIA MECHANICAL CODE
ADOPTED
15.0. 010. Adoption by ( Reference.
The " 2022 2025 California Mechanical Code ( CMC)" (Part 4 of the Title 24 of the California Code of Regulations) is adopted by reference and made part of the municipal code of the GCity of Lathrop as if fully set forth herein.
Ord. 25- § _)
15.0. 020. Application to GCity.
The name " eCity of Lathrop" is inserted in any and all blank spaces provided in the California Mechanical Code for the name of the city adopting such code, and wherever the word " city" as jurisdiction" appears in the eCode or is otherwise used, it shall mean and refer to the ° City of Lathrop.
Ord. 25- § _)
32 Language Removed will be shown in RED STRIKETHROUGH
Revised Language will be shown in BLUE UNDERLINE
Added Language will be shown in GREEN UNDERLINE
EXHIBIT G
Title 15. Buildings and Construction
Chapter 15.2. CALIFORNIA PLUMBING CODE ADOPTED
15.2. 010. Adoption by iReference.
The " 2022 2025 California Plumbing Code ( CPC)" (Part 5 of the Title 24 of the California Code of Regulations) is adopted by reference and made part of the municipal code of the sCity of Lathrop as if fully set forth herein.
No appendices are adopted.
Ord. 25- § _)
15.2. 020. Application to GCity.
The name "- GCity of Lathrop" is inserted in any and all blank spaces provided in the California Plumbing Code and appendices for the name of the city adopting such code, and wherever the word " city" as jurisdiction" appears in the eCode or is otherwise used, it shall mean and refer to the GCity of Lathrop.
Ord. 25- § _)
33 Language Removed will be shown in RED STRIKETHROUGH
Revised Language will be shown in BLUE UNDERLINE
Added Language will be shown in GREEN UNDERLINE
EXHIBIT H
Title 15. Buildings and Construction
Chapter 15.4. CALIFORNIA ENERGY CODE ADOPTED
15.4. 010. Adoption by ( Reference.
The " 2022 2025 California Energy Code ( CEC)" (Part 6 of the Title 24 of the California Code of Regulations) is adopted by reference and made part of the municipal code of the GCity of Lathrop as if fully set forth herein.
Ord. 25- § _)
15.4. 020. Application to cCity.
The name "- GCity of Lathrop" is inserted in any and all blank spaces provided in the California Energy Code for the name of the city adopting such code, and wherever the word "city" as " jurisdiction" appears in the eCode or is otherwise used, it shall mean and refer to the GCity of Lathrop.
Ord. 25- § _)
34 Language Removed will be shown in RED STRIKETHROUGH
Revised Language will be shown in BLUE UNDERLINE
Added Language will be shown in GREEN UNDERLINE
EXHIBIT I
Title 15. Buildings and Construction
Chapter 15.8. CALIFORNIA FIRE CODE ADOPTED
15.8. 010. Adoption by ( Reference.
A. The " 2022 2025 California Fire Code ( CFC)" (Part 9 of the Title 24 of the California Code of Regulations) is adopted by reference and made part of the municipal code of the eCity of Lathrop as if fully set forth herein.
B. Adoption of Certain 2022 2025 CFC Appendix Chapters. The following appendices of the 2022 2025 California Fire Code are adopted by the city of Lathrop, as amended by Section 15.2. 010 of this ciapter: in their entirety:
1. Appendix B ( Fire -Flow Requirements For Buildings);
2. Appendix C ( Fire Hydrant Locations and Distribution);
3. Appendix D ( Fire Apparatus Access Roads).
The remaining appendices are not adopted.
Ord. 25- § _)
15.8. 020. Application to GCity.
The name " City of Lathrop" is inserted in any and all blank spaces provided in the California Fire Code and appendices for the name of the city adopting such code, and wherever the word " city" as jurisdiction" appears in the eCode or is otherwise used, it shall mean and refer to the eCity of Lathrop.
Ord. 25- § i
35 Language Removed will be shown in RED STRIKETHROUGH
Revised Language will be shown in BLUE UNDERLINE
Added Language will be shown in GREEN UNDERLINE
EXHIBIT J
Title 15. Buildings and Construction
Chapter 15. 20. CALIFORNIA EXISTING BUILDING CODE
ADOPTED
15. 20. 010. Adoption by ( Reference.
The " 2022 2025 California Existing Building Code ( CEBC)" which includes " California Historical Code" and " California Reference Standards" ( Part 8, 10 and 12 of the Title 24 of the California Code of Regulations) is adopted by reference and made part of the municipal code of the eCity of Lathrop as if fully set forth herein.
Ord. 25- § _)
15. 20. 020. Application to GCity.
The name "- eCity of Lathrop" is inserted in any and all blank spaces provided in the California Existing Building Code for the name of the city adopting such code, and wherever the word " city" as " jurisdiction" appears in the eCode or is otherwise used, it shall mean and refer to the eCity of Lathrop.
Ord. 25- § _)
36 Language Removed will be shown in RED STRIKETHROUGH
Revised Language will be shown in BLUE UNDERLINE
Added Language will be shown in GREEN UNDERLINE
EXHIBIT K
Title 15. Buildings and Construction
Chapter 15. 22. CALIFORNIA GREEN BUILDING CODE
ADOPTED
15. 22. 010. Adoption by ( Reference.
The " 2022 2025 California Green Building Code ( CGBC)" (Part 11 of the Title 24 of the California Code of Regulations) is adopted by reference and made part of the municipal code of the cCity of Lathrop as if fully set forth herein.
Ord. 25- § _)
15. 22. 00. Application to cCiity.
The name "- GCity of Lathrop" is inserted in any and all blank spaces provided in the California Green Building Code for the name of the city adopting such code, and wherever the word " city" as "jurisdiction" appears in the GCode or is otherwise used, it shall mean and refer to the eCity of Lathrop.
Ord. 25- § _)
37 Language Removed will be shown in RED STRIKETHROUGH
Revised Language will be shown in BLUE UNDERLINE
Added Language will be shown in GREEN UNDERLINE
EXHIBIT L
Title 15. Buildings and Construction
Chapter 15. 24. CALIFORNIA HOUSING CODE ADOPTED
15. 24. 010. Adoption by rReference.
The " 2021 2024 International Property Maintenance Code ( IPMC)" is adopted by reference and made part of the municipal code of the eCity of Lathrop as if fully set forth herein.
Ord. 25- § _)
15. 24. 020. Application to GCity.
The name "- City of Lathrop" is inserted in any and all blank spaces provided in the California Housing Code and appendices for the name of the city adopting such code, and wherever the word city" as "jurisdiction" appears in the cCode or is otherwise used, it shall mean and refer to the cCity of Lathrop. (Ord. 25- § _)
15. 24. 030. Omissions, aAmendments, and aAdditions to the 2021 2024 IPMC.
Chapter 1 Scope and Administration.
Add: Section [ A] 1" ' 0 109.0 (Substandard Building). As defined in Health and Safety Code Section 17922.
Chapter 2 Definitions.
Add: Section 202 Substandard Building. As defined in Health and Safety Code Section 17902. 3.
Ord. 25- § _)
38 ITEM 4.
CITY MANAGER' SREPORT
OCTOBER 13, 2025 CITY COUNCIL REGULAR MEETING
ITEM: SECOND READING AND ADOPTION OF ORDINANCE
25- 473 OF THE CITY COUNCIL OF THE CITY OF
LATHROP TO ADD CHAPTER 15. 32 TO TITLE 15
BUILDINGS AND CONSTRUCTION" TO THE
LATHROP MUNICIPAL CODE TO ESTABLISH AN
EXPEDITED, STREAMLINE PERMITTING PROCESS
FOR ELECTRIC VEHICLE CHARGING STATIONS
RECOMMENDATION: Waive FuII Reading and Adopt Ordinance 25- 473 to Add Chapter 15. 32 to Title 15 " Buildings and
Construction" to the Lathrop Municipal Code to
Establish an Expedited, Streamline Permitting
Process for Electric Vehicle Charging Stations
RECOMMENDED ACTION:
The City Council to conduct a second reading and adopt Ordinance 25- 473 entitled:
AN ORDINANCE OF THE CITY COUNCIL OF THE CITY OF LATHROP TO ADD CHAPTER
15. 32 TO TITLE 15 " BUILDINGS AND CONSTRUCTION" TO THE LATHROP MUNICIPAL
CODE TO ESTABLISH AN EXPEDITED, STREAMLINE PERMITTING PROCESS FOR
ELECTRIC VEHICLE CHARGING STATIONS
SUMMARY:
On September 8, 2025, the City Council approved the introduction and first reading of the subject Ordinance by the following vote:
AYES: Diallo, Dresser, Lazard, Torres - O' Callaghan, and Akinjo NOES: None
ABSTAIN: None
ABSENT: None
The Ordinance will take effect 30 days after adoption.
SUBMITTED BY:
resa Vargas, City Cler Date
39 ORDINANCE NO. 25- 473
AN ORDINANCE OF THE CITY COUNCIL OF THE CITY OF LATHROP TO ADD CHAPTER 15. 32 TO TITLE 15 (" BUILDINGS AND CONSTRUCTION") TO THE
LATHROP MUNICIPAL CODE TO ESTABLISH AN EXPEDITED, STREAMLINE
PERMITTING PROCESS FOR ELECTRIC VEHICLE CHARGING STATIONS WHEREAS, the State of California has identified the widespread deployment of electric vehicle charging infrastructure as essential to the State' sgoals for reducing greenhouse gas emissions and promoting cleaner transportation alternatives; and WHEREAS, the State of California adopted Assembly Bill 1236, which requires local agencies to adopt an ordinance that creates an expedited and streamline permitting process for electric vehicle charging stations ( EVCS); and WHEREAS, the State of California adopted Assembly Bill 970, which requires cities to review EVCS permit applications under strict time limits and to deem applications approved if action is not taken within those timelines; and WHEREAS, the City of Lathrop desires to encourage and facilitate the development of electric vehicle charging infrastructure by reducing administrative barriers and complying with all enforced and applicable state laws; and WHEREAS, the City acknowledges the transition to zero -emission vehicles and supporting EV adoption through responsive and efficient permitting practices; and WHEREAS, Sections 65850. 7 and 65850. 71 of the Government Code mandates that jurisdictions shall administratively approve EVCS applications through a ministerial process, unless the installation would have a specific, adverse impact upon public health or safety that cannot be mitigated; and WHEREAS, this Ordinance is intended to fully implement and comply with the requirements of Assembly Bill 1236 and Assembly Bill 970 and any guidance provided by the Governor' sOffice of Business and Economic Development; and WHEREAS, this Ordinance establishes procedures for electronic submittal, a publicly available submittal checklist for expedited permitting, strict permit review timelines, limited conditions for denial, and other requirements to streamline the approval process for EVCS projects; and
WHEREAS, this Ordinance contains no such findings regarding climatic, geological and/ ortopographical conditions; and
WHEREAS, the City Clerk will file this Ordinance and findings with the California Building Standard Commission after adoption; and Ordinance No. 25- 473
40 THIS ORDINANCE was introduced at a regular meeting of the City Council of the City of Lathrop on the 8th day of September 2025, and was PASSED AND ADOPTED at a regular meeting of the City Council of the City of Lathrop on the day of , 2025 by the following vote, to wit:
AYES:
NOES:
ABSENT:
ABSTAIN:
Paul Akinjo, Mayor
ATTEST: APPROVED AS TO FORM:
Teresa Vargas, City Clerk Salvador Navarrete, City Attorney Ordinance No. 25- 473
41 EXHIBIT A
PROPOSED CHAPTER
Title 15. Buildings and Construction
Chapter 15. 32. ELECTRIC VEHICLE CHARGING SYSTEMS
EVCS)
15. 32. 010. Authority —Purpose —Applicability.
A. Authority. This chapter is adopted under the authority of Government Code Section 65850. 7.
B. Purpose. The purpose of this chapter is to adopt an expedited, streamlined permitting process for electric vehicle charging stations ( EVCS).
C. Applicability. This chapter applies to the permitting of electric vehicle charging stations installed in commercial and residential applications.
Ord. 25- § _)
15. 32. 020. Definitions.
The following words and phrases as used in this chapter are defined as follows:
Electronic Submittal" means the utilization of one or more of the following:
1. The City' s online portal;
2. The Internet;
3. Facsimile.
Electric Vehicle " means the following:
1. An automotive - type vehicle for on -road use, such as passenger automobiles, buses, trucks, vans, neighborhood electric vehicles, electric motorcycles, and the like, primarily powered by an electric motor that draws current from a rechargeable storage battery, fuel cell, photovoltaic array, or other source of electric current.
2. Plug- in hybrid electric vehicles ( PHEV) are considered electric vehicles For the purposes of this chapter, off -road, self- propelled electric vehicles, such as industrial trucks, hoists, lifts, transports, golf carts, airline ground support equipment, tractors, boats, and the like, are not included.
Electric Vehicle Charging Station ( EVCS)" means the following:
1. Any level of electric vehicle supply equipment station that is designed and built in compliance with Article 625 of the California Electrical Code, as it reads on the effective date of this Chapter, and delivers electricity from a source outside an electric vehicle into a plug- in electric vehicle.
Specific, Adverse Impact" means the following:
42 PROPOSED CHAPTER
1. A significant, quantifiable, direct, and unavoidable impact, based on objective, identified, and written public health or safety standards, policies, or conditions as they existed on the date the application was deemed complete.
Ord. 25- §_)
15. 32. 030. Expedited Permitting Process
A. Consistent with Section 65850. 7of the Government Code, the Building Official shall develop and implement an expedited, streamline permitting process for electric vehicle charging stations, and shall adopt a checklist of all requirements with which electric vehicle charging stations shall comply in order to be eligible for expedited review.
B. The expedited, streamline permitting process and checklist may refer to the recommendations contained in the current version of the "Plug -In Electric Vehicle Infrastructure Permitting Checklist" of the " Zero -Emission Vehicles in California: Community Readiness Guidebook" as published by the Governor' sOffice of Planning and Research.
C. The City' s adopted checklist shall be published on the City' s website.
Ord. 25- § _)
15. 32. 040. Requirements for Expedited Review and Inspections A. Application. An applicant for an electric vehicle charging system shall submit an electronic submittal containing a building permit application on the form provided by the City, accompanied by plans that reflect compliance with each item of information listed in the electric vehicle charging system checklist. Both the application and checklist are available online.
A permit application that satisfies the information requirements in the City' s adopted checklist, as determined by the Building Official, and shows no specific, adverse impacts upon public health or safety, shall be deemed complete and be promptly processed for approval. Permit issuance will commence once all permit processing and inspection fees are paid by the applicant.
Upon receipt of an incomplete application, the Building Official shall issue a written correction notice detailing all deficiencies in the application and any additional information required to be eligible for expedited permit issuance.
Where it is found that the installation of an electric vehicle charging station will have a specific, adverse impact on public health or safety, the Building Official may require conditions for the installation of the electric vehicle charging station to mitigate a specific, adverse impact on public health or safety, consistent with Government Code Section 65850. 7.
B. Inspection. When a building permit is issued for a electric vehicle charging system, inspections will be performed in an efficient and timely manner and should include consolidated inspections where possible; inspection measures taken should be consistent with all applicable laws, codes and standards to ensure the electric vehicle charging system is properly and safely installed.
Ord. 25- )
43 PROPOSED CHAPTER
15. 32. 050. Electric Vehicle Charging Station Installation Requirements
A. All electric vehicle charging stations shall meet all applicable health and safety standards and the requirements imposed by the State and the City, local Fire Department, and servicing electric utility companies regarding safety and reliability.
B. Electric vehicle charging stations shall meet all applicable safety and performance standards established by the California Electrical Code, the Society of Automotive Engineers, the National Electrical Manufacturers Association, and accredited testing laboratories such as Underwriters Laboratories and, where applicable, rules of the Public Utilities Commission regarding safety and reliability.
C. Installation of electric vehicle charging stations and associated wiring, bonding, disconnecting means and overcurrent protective devices shall meet the requirements of Article 625 and all applicable provisions of the California Electrical Code.
D. Installation of electric vehicle charging stations shall be incorporated into the load calculations of all new or existing electrical services and shall meet the requirements of the California Electrical Code and the California Green Building Code. Electric vehicle charging equipment shall be considered a continuous load.
E. Anchorage of either floor -mounted or wall - mounted electric vehicle charging stations shall meet the requirements of the California Building Code or California Residential Code, as applicable per occupancy, and the provisions of the manufacturer' sinstallation instructions. Mounting of charging stations shall not adversely affect building elements.
F. An automatic load management system ( ALMS) may be used to reduce the maximum required electrical capacity to each EVSE space served by the ALMS in accordance with requirements of the California Green Building Code.
G. The electric vehicle charging requirements set forth herein are intended to reflect the electric vehicle charging requirements set forth in the most current California Building Standards Code, Title 23 of the California Code of Regulations. State Law shall govern in the event of any inconsistency relating to electric vehicle charging requirements between the most current California Building Standards Code and this Chapter.
Ord. 25- §_)
44 ITEM 4. 5
CITY MANAGER' SREPORT
OCTOBER 13, 2025 CITY COUNCIL REGULAR MEETING
ITEM: ANNUAL REVIEW AND ADOPTION OF THE CITY' S
INVESTMENT POLICY
RECOMMENDATION: Adopt a Resolution to Approve the Annual Investment Policy for Fiscal Year 2025/6
SUMMARY:
PFM Asset Management, LLC ( PFM), the City' s investment portfolio manager, has conducted its annual review of the City' sInvestment Policy to ensure compliance with investment regulatory agencies and the California Government Code. PFM has found that the City' s Investment Policy for Fiscal Year 2025/6 is comprehensive and consistent with the City' s objectives and risk tolerances and is in compliance with the California Government Code and has recommended several minor edits to the policy.
The proposed FY 2025/6 Investment Policy is attached ( Attachment B).
Staff recommends the approval of the Investment Policy as presented by PFM to be in compliance with current investment regulations adopted by the California Government Code.
BACKGROUND:
PFM manages over $ 118 billion for public entities nationwide and has a strong history of providing professionals dedicated to actively managing and supporting the administration of fixed - income operating funds, capital funds and reserves, and bond proceeds.
PFM has actively managed the City' s investment portfolio since the initial Council approved contract in 2015. PFM is nationally recognized as one of the leading investment advisory organizations, specializing in providing services to the public sector. Some of the services PFM provides are:
Review of the City' s Investment Policy
Cash flow analysis to determine current and future liquidity needs Develop and implement investment strategy
The investment policy serves as the foundation of the City' s investment goals and priorities. An annual review assures that it continues to meet the City' s goals and priorities for its portfolio. It contributes to the protection of the assets of the City.
The approved investment policy demonstrates that the City Council is fiducially responsible, thereby; promoting trust and confidence from the public that it serves.
PFM has performed its annual review of the City' s Investment Policy along with current state laws governing investment activities of local governments. PFM has found that the City' s Investment Policy for Fiscal Year 2025/6is comprehensive, is consistent with the City' s objectives and risk tolerances, and is in compliance with 45 CITY MANAGER' SREPORT Page 2
OCTOBER 13, 2025 CITY COUNCIL REGULAR MEETING
ANNUAL REVIEW AND ADOPTION OF THE INVESTMENT POLICY FOR FY 2025/6
the California Government Code and has recommended several minor edits to the policy. The proposed FY 2025/6Investment Policy is attached ( Attachment B).
REASON FOR RECOMMENDATION:
The City' s investment policy provides the Finance Department with direction as to the investment objectives of the governing body ( in order of priority):
1. Safety - Preservation of the principal of invested funds
2. Liquidity - Ability to liquidate one or more of the City' s investments if unexpected expenditures arise
3. Return - Attainment of a market rate of return
It also establishes standards approved by Council; concerning the prudent care of City invested funds, the ethics of the investment officer, and internal controls/ reporting procedures.
In addition, the Government Finance Officers Association' s (GFOA) Committee on Cash Management advocates the adoption of a municipal resolution that consists of; a legal list of allowable securities, a prudent investor clause and the mandatory enactment of written investment policies. An adopted investment policy, prudently followed by the investment officer, is favorably viewed by municipal credit rating agencies. The submitted resolution meets GFOA standards.
FISCAL IMPACT:
Review of the City' sInvestment Policy is a service provided within the scope of PFM' s annual contract.
ATTACHMENTS:
A. Resolution to Approve the Annual Investment Policy for Fiscal Year 2025/6 B. Investment Policy for Fiscal Year 2025/6
C. Memorandum Confirming Review of the Investment Policy from PFM Asset Management, LLC.
46 CITY MANAGER' S REPORT Page 3
OCTOBER 13, 2025 CITY COUNCIL REGULAR MEETING
ANNUAL REVIEW AND ADOPTION OF THE INVESTMENT POLICY FOR FY 2025/6
APPROVALS:
Cari Jam
Director . V Finance
9/ 36/ RA. zsDate
Thomas Hedegard Date
9/ 3o/ 70zs—
Deputy City Manager
Salvador Navarrete Date
City Attorney
a - 2.- LS
Stephen J. Salvatore Date
City Manager
47 RESOLUTION NO. 25-
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF LATHROP TO
APPROVE THE ANNUAL INVESTMENT POLICY FOR FISCAL YEAR
2025/6
WHEREAS, Government Code § 53646( a) (1) of the State of California was amended to offer the suggestion, rather than the requirement, that local agencies file an annual investment policy; and WHEREAS, the California Debt and Investment Advisory Commission highly recommends local agencies' legislative bodies adopt an annual investment policy to increase the policy' s authority and legitimacy; and WHEREAS, Staff recommends and the City Council desires to adopt the Fiscal Year 2025/6Investment Policy; and
WHEREAS, the City' s Investment Policy provides the Finance Department with direction as to the investment objectives of the governing body ( in order of priority):
1. Safety - Preservation of the principal of invested funds
2. Liquidity - Ability to liquidate one or more of the City' s investments if unexpected expenditures arise
3. Return - Attainment of a market rate of return; and
WHEREAS, the Investment Policy for the City of Lathrop for Fiscal Year 2025/6is attached to the City Manager' sReport as " Attachment B".
NOW, THEREFORE, BE IT RESOLVED that the City Council of the City of Lathrop, does hereby approve the Investment Policy for the City of Lathrop for Fiscal Year 2025/6.
Resolution No. 25- Page 1 of 2
48 The foregoing resolution was passed and adopted this 13th day of October, 2025, by the following vote of the City Council, to wit:
AYES:
NOES:
ABSTAIN:
ABSENT:
Paul Akinjo, Mayor
ATTEST: APPROVED AS TO FORM:
Teresa Vargas, City Clerk Salvador Navarrete, City Attorney Resolution No. 25- Page 2 of 2
49 City of Lathrop
Investment Policy
Fiscal Year 2024 252025- 26
Attachment " B"
50 City of Lathrop
Investment Policy
Table of Contents
1. 0 Policy
2. 0 Scope
3. 0 Prudence
4. 0 Objectives
5. 0 Delegation ofAuthority
6. 0 Ethics and Conflict of Interest
7. 0 Authorized Broker/ Dealers
8. 0 Authorized and Suitable Investments
9. 0 Competitive Transactions
10. 0 Selection of Depositories
11. 0 Safekeeping and Custody
12. 0 Diversification
13. 0 Maximum Maturities
14. 0 Performance Standards
15. 0 Reporting
16. 0 Investment Policy Adoption
Glossaries
1 1
1 2
2 2
3 3
6 6
7 7
7 7
8 8
9 Attachment " B"
51 1. 0 POLICY
The City Council of the City of Lathrop, California ( the City) has adopted this Investment Policy in order to establish the investment scope, objectives, delegation of authority, standards of prudence, reporting requirements, internal controls, eligible investments and transactions, diversification requirements, risk tolerance, and safekeeping and custodial procedures for the investment of the funds of the City. All City funds will be invested in accordance with this Investment Policy and with applicable sections of the California Government Code.
This Investment Policy was endorsed and adopted by the City Council of the City of Lathrop on November 10, 2025 3, 2023. It replaces any previous investment policy or investment procedures of the City.
2. 0 SCOPE
This Investment Policy shall apply to all investment activities and financial assets of the City, as accounted for in the City' sCompre iensive Annual Comprehensive Financial Report, and which include the following:
General Fund
Special Revenue Funds
Debt Service Funds
Capital Project Funds
Enterprise Funds
Trust and Agency Funds
The provisions of this Investment Policy do not apply to those cash assets governed by bond indentures, bond resolutions, employee' sretirement and deferred compensation funds, as those are administered separately.
3. 0 PRUDENCE
The standard of prudence to be used for managing the City' s investments shall be California Government Code Section 53600. 3, the prudent investor standard, which states that " when investing, reinvesting, purchasing, acquiring, exchanging, selling, or managing public funds, a trustee shall act with care, skill, prudence, and diligence under the circumstances then prevailing, including, but not limited to, the general economic conditions and the anticipated needs of the agency, that a prudent person acting in a like capacity and familiarity with those matters would use in the conduct of funds of a like character and with like aims, to safeguard the principal and maintain the liquidity needs of the agency."
The City' s overall investment program shall be designed and managed with a degree of professionalism that is worthy of the public trust. The City recognizes that no investment is totally without risk and that the investment activities of the City are a matter of public record.
Accordingly, the City recognizes that occasional measured losses may occur in a diversified portfolio and shall be considered within the context of the overall portfolio' sreturn, provided that adequate diversification has been implemented and that the sale of a security is in the best longterm interest of the City.
Individuals having investment responsibilities who act in accordance with written procedures and this Investment Policy and who exercise due diligence in performing their duties shall be relieved 1 -
52 of personal responsibility for an individual security' scredit risk or market price changes, provided that deviations from expectations are reported in a
timely fashion and appropriate action is taken to
control adverse developments.
4. 0 OBJECTIVES
The City' sfunds shall be invested in accordance with all applicable City municipal codes and applicable resolutions, California statutes, and Federal regulations, and in a manner designed to accomplish the following objectives, which are listed in priority order:
1. Preservation of capital and protection of investment principal.
2. Maintenance of sufficient liquidity to meet anticipated cash flows.
3. Attainment of a market value rate of return.
4. Diversification to avoid incurring unreasonable market risks.
5. 0 DELEGATION OF AUTHORITY
Authority to manage the City' sinvestment program is derived from the City of Lathrop Municipal Code, Title 2, Chapter 2. 08, Section 2. 08.10. F.2. and from California Government Code Section 53607. In exercise ofthat authority, the City Council has delegated responsibility for the investment program to the Treasurer. The City Manager, who serves as Treasurer, shall be responsible for all transactions undertaken and shall establish a
system of controls to regulate the activities of subordinate officials. The City Manager may delegate investment decision making and execution authority to the City' s
Director of Finance and to other specifically authorized officers and employees. The Director of Finance shall maintain a list of persons authorized to transact securities business for the City.
No person may engage in an investment transaction except as expressly provided under the terms of this Investment Policy.
The Director of Finance shall develop written administrative procedures and internal controls, consistent with this Investment Policy, for the operation of the City' sinvestment program. Such procedures shall be designed to prevent losses of public funds arising from fraud, employee error, misrepresentation by third parties, or imprudent actions by employees of the City.
The Director of Finance shall establish a process for annual independent review of the City' s investment program by an external auditor. This review will provide internal control by assuring compliance with policies and procedures.
The City may engage the support services of outside investment advisors in regard to its investment program, so long as it can be clearly demonstrated that these services produce a net financial advantage or necessary financial protection of the City' sfinancial resources.
6. 0 ETHICS AND CONFLICTS OF INTEREST
Officers and employees involved in the investment process shall refrain from personal business activity that could conflict with the proper execution and management of the City' s investment program, or
that could impair their ability to make impartial decisions. Investment officials shall disclose any material interest in financial institutions that conduct business with the City. They shall further disclose any personal financial/ investment positions that could be related to the performance of the City' s investment portfolio. Employees and officers handling investment transactions shall refrain from undertaking personal investment transactions with the same individual with whom business is conducted on behalf of the City.
2 -
53 7. 0 AUTHORIZED BROKER/ DEALERS
The Director of Finance shall maintain a list of authorized broker/ dealers approved for investment purposes, and it shall be the policy of the City to purchase securities only from those brokers and the firms they represent. Each approved broker/ dealer must possess an authorizing certificate from the California Commissioner of Corporations as required by Section 25210 of the California Corporations Code.
The firms they represent must:
L be recognized as a Primary Dealer by the Federal Reserve Bank of New York or have a primary dealer within their holding company structure, or
2. report voluntarily to the Federal Reserve Bank of New York, or
3. qualify under Securities and Exchange Commission ( SEC) Rule 15c3- (Uniform Net Capital Rule).
Broker/ dealers will be selected by the Director of Finance on the basis of their expertise in public cash management and their ability to provide services for the City' s account.
Annually, each authorized broker/ dealer shall submit a City approved Broker/ Dealer Information Request form and the firm' s most recent financial statements. The Director of Finance shall maintain a list of approved broker/ dealers, along with each firm' s most recent Broker/ Dealer Information Request form.
The City may purchase commercial paper from direct issuers even though they are not on the approved broker/ dealer list as long as they meet the criteria outlined in Item 8. 6 of the Authorized and Suitable Investments section of this Investment Policy.
Broker/ dealers or municipal securities dealers, that have made political contributions to any member ofthe City Council or to any candidate for that office, in amounts exceeding the limits set forth in Rule G- 37 of the Municipal Securities Rulemaking Board, are prohibited from serving as a City approved broker/ dealer for a period of two years following such contributions.
If the City engages the support services of an outside investment advisor, the adviser is authorized to transact with its broker/ dealer relationships on behalf of the City.
8. 0 AUTHORIZED AND SUITABLE INVESTMENTS
All investments and deposits of the City shall be made in accordance with California Government Code Sections 16429., 53600-3609 and 53630-3686, except that reserve funds from the proceeds of debt issues may be invested in permitted investments specified in the indenture of the debt issue.
For purposes of compliance with this section, an investment' sterm or remaining maturity shall be measured from the settlement date to final maturity. A security purchased in accordance with this section shall not have a forward settlement date exceeding 45 days from the time of investment.
The City has further restricted authorized investments to the following:
8. 1 Government Obligations
3 -
54 As authorized in Government Code Sections 53601( ab) through and (ef), this category includes a wide variety of government securities. There are no portfolio limitations on the amount; however, the maturity term ofthese investment vehicles may not exceed five years from the date oftrade settlement unless approved by the City Council. These securities include the following:
8. 1.a. United States Treasury bills, notes, bonds, or certificates of indebtedness, or those for which the faith and credit of the United States are pledged for the payment of principal and interest with a final maturity not exceeding five years from the date oftrade settlement.
8. 1.b. Federal Agency mortgage backed securities and debentures with a final maturity not exceeding five years from the date of trade settlement.
8. 1. c. Federal agency or United States government - sponsored enterprise obligations, participations, or other instruments, including those issued by or fully guaranteed as to principal and interest by federal agencies or United States government - sponsored enterprises with a final maturity not exceeding five years from the date of trade settlement.
8. 2 State and Local Agency Obligations
8. 2. a. Obligations of the State of California and any local agency within California, including bonds payable solely out of the revenues from a revenue -producing property owned, controlled, or operated by the local agency, or by a department, board, agency, or authority ofthe local agency or of the state with a final maturity not exceeding five years from the date of trade settlement, and rated in a rating
category of " A" or the equivalent or better by a Nationally Recognized Statistical Rating Organization ( NRSRO) at the time of purchase. The aggregate investment in state and local agency obligations shall not exceed 30% of the City' stotal portfolio.
8. 2.b. Registered treasury notes or bonds of any of the other 49 states in addition to California, including bonds payable solely out of the revenues from a revenue -producing property owned, controlled, or operated by a state or by a department, board, agency, or authority of any ofthe other 49 states, in addition to California with a final maturity not exceeding five years from the date of trade settlement, and rated in a
rating category of "A" or the equivalent or better by a Nationally Recognized Statistical Rating Organization ( NRSRO) at the time of purchase. The aggregate investment in state and local agency obligations shall not exceed 30% ofthe City' stotal portfolio.
8. 3 Medium - Term Notes
Medium - Term Notes issued by corporations organized and operating within the United States or by depository institutions licensed by the United States or any state and operating within the United States, with a final maturity not exceeding five years from the date of trade settlement, and rated in a rating
category of "A" or the equivalent or better by a NRSRO at the time of purchase. No more than 10% of the City' stotal portfolio shall be invested in medium - term notes and the commercial paper of any one issuer, and the aggregate investment in medium -term notes shall not exceed 30% of the City' s total portfolio. In addition, AAA rated FDIC - guaranteed corporate bonds are herein authorized, within the aforementioned diversification and maturity requirements.
8. 4 Negotiable Certificates ofDeposit
Negotiable Certificates of Deposit with a maturity not exceeding five years from the date of trade settlement, issued by a nationally or state - chartered bank, a savings association or a federal association ( as defined by Section 5102 of the Financial Code), a state or federal credit union, or 4-
55 by a federally licensed or state -licensed branch of a foreign bank. Certificates of Deposits may be
purchased only from financial institutions that meet the criteria set forth in the section of this Investment Policy, " Selection of Depositories." Investment in negotiable Certificates of Deposit shall not exceed 30% of the City' stotal portfolio.
8. 5 Non- negotiable Certificates of Deposit
Non- negotiable Certificates of Deposit with a maturity not exceeding five years from the date of trade settlement, in FDIC insured state or nationally chartered banks or savings banks, subject to the limitations of California Government Code Section 53638. Amounts in excess of FDIC insurance coverage shall be secured in accordance with California Government Code Section 53652. Certificates of Deposits may be purchased only from financial institutions that meet the criteria set forth in the section of this Investment Policy, "Selection of Depositories." Investment in non- negotiable Certificates of Deposit shall not exceed 30% of the City' stotal portfolio.
8. 6 Commercial Paper
Prime Commercial Paper with a maturity not exceeding 270 days from the date of trade settlement with the highest ranking or of the highest letter and number rating as provided for by a NRSRO.
The entity that issues the commercial paper shall meet all of the following conditions in either subparagraph A. or sub -paragraph B. below:
A. The entity shall ( 1) be organized and operating in the United States as a general corporation, (2) have total assets in excess of $500, 00,0and (3) have debt other than commercial paper, if any, that is rated in a
rating category of "A" or the
equivalent or higher by a NRSRO.
B. The entity shall ( 1) be organized within the United States as a special purpose corporation, trust, or limited liability company, ( 2) have program - wide credit enhancements, including, but not limited to, over collateralization, letters of credit or surety bond and ( 3) have commercial paper that is rated " A- 1" or higher, or the equivalent, by a NRSRO.
No more than 10% of the City' s total portfolio shall be invested in the commercial paper and corporate notes of any one issuer, and the aggregate investment in commercial paper shall not exceed 25% of the City' stotal portfolio.
8. 7 Banker' sAcceptances
Eligible Banker' s Acceptances with a maturity not exceeding 180 days from the date of trade settlement, drawn on or accepted by a FDIC insured commercial bank with combined capital and surplus of at least $ 250 million, whose senior long- term debt is rated in a rating category of "A" or
the equivalent or better by a NRSRO at the time of trade settlement. No more than 30% of the City' stotal portfolio shall be invested in banker' s
acceptances of any one issuer, and the aggregate
investment in banker' s
acceptances shall not exceed 40% ofthe City' stotal portfolio.
8. Repurchase Agreements
Repurchase Agreements with a final termination date not exceeding 30 days collateralized by U. S.
Treasury obligations, Federal Agency securities, or Federal Instrumentality securities listed in Section 8. 1 above with the maturity of the collateral not exceeding five years. For the purpose of 5 -
56 this section, the term collateral shall mean purchased securities under the terms of the City' s approved Master Repurchase Agreement. The purchased securities shall have a minimum market value including accrued interest of 102% of the dollar value ofthe funds borrowed. Collateral shall be held in the City' scustodian bank, as safekeeping agent, and the market value of the collateral securities shall be marked -to -the -market daily.
Repurchase Agreements shall be entered into only with broker/ dealers who are recognized as Primary Dealers with the Federal Reserve Bank of New York, or with firms that have a Primary Dealer within their holding company structure. Primary Dealers approved as Repurchase Agreement counterparties shall have a short- tem credit rating of at least A- 1 or the equivalent and a
long- term credit rating in a
rating category of "A" or the equivalent or better. Repurchase agreement counterparties shall execute a City approved Master Repurchase Agreement with the City. The Director of Finance shall maintain a
copy of the City' s approved Master Repurchase
Agreement along with a list of the broker/ dealers who have executed same. There are non portfolio limits for repurchase agreements.
8. 9 Money Market Funds
Money Market Funds registered under the Investment Company Act of 1940 that ( 1) are " no- load" meaning no commission or fee shall be charged on purchases or sales of shares); (2) have a constant net asset value per share of $1. 00; (3) invest only in the securities and obligations authorized in the applicable California statutes and ( 4) have a
rating of AAAm or the equivalent by not less than two
NRSROs. The combined investment in money market funds and mutual funds shall not exceed 20% of the City' stotal portfolio.
8. 10 Mutual Funds
Mutual Funds registered under the Investment Company Act of 1940 which ( 1) are " no- load" meaning no commission or fee shall be charged on purchases or sales of shares); (2) invest in the securities and obligations authorized in the applicable California statutes and ( 3) have a rating of
AAAm or the equivalent by not less than two NRSROs. No more than 10% of the City' stotal portfolio may be invested in mutual funds of any one issuer, and the combined investment in mutual funds and money market funds shall not exceed 20% of the City' stotal portfolio.
8. 11 Local Agency Investment Fund
State of California' s Local Agency Investment Fund ( LAIF), pursuant to California Government Code Section 16429..
8. 12 Shares of beneficial interest issued by a
joint powers authority
Shares of beneficial interest issued by a
joint powers authority organized pursuant to Section 6509. 7 that invests in the securities and obligations authorized in California Government Code Section 53601 subdivisions (a) to ( r), inclusive. Each share shall represent an equal proportional interest in the underlying pool of securities owned by the joint powers authority. To be eligible under this section, the joint powers authority issuing the shares shall have retained an investment adviser that meets all of the following criteria:
1) The adviser is registered or exempt from registration with the Securities and Exchange Commission.
6-
57 2) The adviser has not less than five years of experience investing in the securities and obligations authorized in subdivisions ( a) to ( q), inclusive. 3) The adviser has assets under management in excess of five hundred million dollars 500, 00,00).
8. 13 Supranational Debt
United States dollar denominated senior unsecured unsubordinated obligations issued or unconditionally guaranteed by the International Bank for Reconstruction and Development, International Finance Corporation, or Inter -American Development Bank, with a maximum remaining maturity of five years or less, and eligible for purchase and sale within the United States.
Investments under this subdivision shall be rated in a
rating category of "AA" or the equivalent or
better by an NRSRO and shall not exceed 30% of the City' stotal portfolio.
8. 14 Allowable Investment Vehicles
It is the intent ofthe City that the foregoing list of authorized securities and transactions is strictly interpreted. Any deviation from this list must be approved in advance by the City Council.
The City may, from time to time issue bonds, the proceeds of which must be invested to meet specific cash flow requirements. In such circumstances the reinvestment of debt issuance or related reserve funds will be governed by the bond documents and may deviate from the provisions ofthis Investment Policy.
9. 0 COMPETITIVE TRANSACTIONS
Each investment transaction shall be competitively transacted with authorized broker/ dealers. At least three broker/ dealers shall be contacted for each transaction and their bid and offering prices shall be recorded.
If the City is offered a security for which there is no other readily available competitive offering, then the Director of Finance will document quotations for comparable or alternative securities.
10. 0 SELECTION OF DEPOSITORIES
To be eligible for designation to provide depository and other banking services or for an institution' s certificates of deposit to be eligible for purchase, a bank or savings bank must be a member of the Federal Deposit Insurance Corporation and shall qualify as a depository of public funds in the State of California as defined in California Government Code Section 53630. 7 -
58 11. 0 SAFEKEEPING AND CUSTODY
The Director of Finance shall select one or more banks to provide third party safekeeping and custodial services for the City, in accordance with the provisions of Section 53608 of the California Government Code. A Safekeeping Agreement approved by the City shall be executed with each custodian bank prior to utilizing that bank' ssafekeeping services. Custodian banks will be selected on the basis of their ability to provide services for the City' s account and the competitive pricing of their safekeeping related services.
The purchase and sale of securities and repurchase agreement transactions shall be settled on a delivery versus payment basis. Title to all securities shall be perfected in the name of the City.
Sufficient evidence to title shall be consistent with modern investment, banking and commercial practices.
All investment securities, except Non- negotiable Certificates of Deposit, Money Market Funds, Mutual Funds, shares of beneficial interest issued by a joint powers authority, and LAIF, purchased
by the City will be delivered by either book entry or physical delivery and will be held in third - party safekeeping by a City approved custodian bank, its correspondent bank or its Depository Trust Company (DTC) participant account.
All Fed wireable book entry securities owned by the City shall be held in the Federal Reserve System in a customer account for the custodian bank which will name the City as " customer." All DTC eligible securities shall be held in the custodian bank' sDTC participant account and the custodian bank shall provide evidence that the securities are held for the City as " customer." All non -book entry ( physical delivery) securities shall be held by the custodian bank or its correspondent bank and the custodian bank shall provide evidence that the securities are held by the bank for the City as " customer."
12. 0 DIVERSIFICATION
The City will diversify its investments by security type and institution. With the exception of Government Obligations set forth in Section 8.1, Repurchase Agreements and LAIF, and notwithstanding the individual limitations set forth herein, no more than 50% of the City' stotal investment portfolio will be invested in a single security type or with a single financial institution.
13. 0 MAXIMUM MATURITIES
To the extent possible, investments shall be matched with anticipated cash flow requirements and known future liabilities. With the exception of reserve funds, the City will not invest in securities maturing more than five years from the date of trade settlement, unless the City Council has by resolution granted authority to make such an investment at least three months prior to the date of investment.
Reserve funds may be invested in securities exceeding five years ifthe maturity of such investments is made to coincide as nearly as practicable with the expected use of the funds. 8-
59 14. 0 PERFORMANCE STANDARDS
The investment portfolio shall be designed to attain a market rate of return throughout budgetary and economic cycles, taking into account prevailing market conditions, risk constraints for eligible securities, and cash flow requirements. An appropriate performance benchmark shall be established against which portfolio performance shall be compared on a regular basis. The performance of tie
City' sinvestments shall be compared to the average yield on the U. S. Treasury security that most c osely corresponds to the portfolio' sweigred average ef-c- ive maturity. When comparing the performance of the City' s portfolio, its rate of return will be computed net of all fees and expenses.
15. 0 REPORTING
The Director of Finance shall provide the City Council quarterly Investment Reports. The reports shall include the following on all invested monies:
1. Issuer name
2. Type of investment instrument
3. Purchase date
4. Maturity date
5. Weighted average maturity
6. Ending balances
7. Yield on cost
8. Weighted average yield
9. Benchmark suitable for weighted average maturity
10. Purchase Price
11. Market value
12. Percent of portfolio of each investment
13. Investments under the management of contracted parties
14. Statement of compliance with the investment policy
15. Statement of ability to meet obligations of next six months
16. 0 INVESTMENT POLICY ADOPTION
This Investment Policy shall be adopted by resolution of the City Council. The policy will be reviewed by the City Council annually, and any modifications made thereto must be approved by the City Council.
9 -
60 GLOSSARY OF SELECTED TERMS
Benchmark
A passive index used to compare the performance, relative to risk and return, of an investor' s portfolio.
Cash Flow
A comparison of cash receipts ( revenues) to required payments ( debt service, operating expenses, etc.).
Credit Risk
The chance that an issuer will be unable to make scheduled payments of interest and principal on an outstanding obligation. Another concern for investors is that the market' s perception of a corporation' scredit will cause the market value of a security to fall, even ifdefault is not expected.
Credit Rating
Various alphabetical and numerical designations used by institutional investors, Wall Street underwriters, and commercial rating companies to give relative indications of bond and note creditworthiness. Standard & Poor' s and Fitch Ratings use the same system, starting with their highest rating, of AAA, AA, A, BBB, BB, B, CCC, CC, C, and D for default. Moody' sInvestors Service uses Aaa, Aa, A, Baa, Ba, B, Caa, Ca, C, and D. Each of the services use pluses (+), minuses or numerical modifiers to indicate steps within each category. The top four letter categories are considered investment grade ratings.
Duration
A measure of the timing of cash flows to be received from a security that provides the foundation for a measure of the interest rate sensitivity of a bond. Duration is an elasticity measure and represents the percentage change in price divided by the percentage change in interest rates. A high duration measure indicates that for a given level of movement in interest rates, prices of securities will vary considerably.
Fiduciary
An individual who holds something in trust for another and bears liability for its safekeeping.
Investment Oversight Committee
A committee ofthree to eleven members formed under Government Code Section 27131 to monitor and review a county' s
investment policy by causing an annual audit and discussing its finding at an open meeting. Although cities and other local agencies are not required to compose an investment oversight committee, the State Legislature has declared that all local agencies " should participate in reviewing the policies that guide the investment ofthose funds." Liquidity
The ease with which an investment may be converted to cash, either by selling it in the secondary market or by demanding its repurchase pursuant to a put or other prearranged agreement with the issuer or another party.
10 -
61 Liquidity Risk
The chance that a security, sold prior to maturity, will be sold at a loss of value. For a local agency, the liquidity risk of an individual investment may not be as critical as how the overall liquidity of the portfolio allows the agency to meet its cash needs.
Market Risk
The chance that the value of a security will decline as interest rates rise. In general, as interest rates fall, prices of fixed income securities rise. Similarly, as interest rates rise, prices fall. Market risk also is referred to as systematic risk or risk that affects all securities within an asset class similarly.
Maturity
The stated date on which all or a stated portion of the principal amount of a security becomes due and payable.
Net Present Value
An amount that equates future cash flows with their value in present terms.
Par Amount or Par Value
The principal amount of a note or bond which must be paid at maturity. Par, also referred to as the face amount" of a security, is the principal value stated on the face of the security. A par bond is one sold at a price of 100 percent of its principal amount.
Pooled Investment
A market institution authorized under various sections of state law that represents the combined deposits of more than one local agency and pays returns based upon each local agency' sshare of investment in the pool.
Portfolio
The combined holdings of all investment assets held by an investor.
Principal Amount
The face amount or par amount of a bond or issue of bonds payable on stated dates of maturity.
Put
The ability of a holder of an investment security to sell at a specified time and for a specified price the security back to the issuer or prior holder.
Return
The principal plus interest on an investment or portfolio of investments. In certain unfavorable market environments or due to risk factors, income derived from principal and interest may be less than the original amount invested.
Risk
The uncertainty of maintaining the principal or interest associated with an investment due to a variety of factors.
Yield
For the purposes of this publication, return and yield are synonymous. 11 -
62 GLOSSARY OF INVESTMENT INSTRUMENTS
Asset -Backed Securities
Securities that are supported by pools of assets, such as installment loans or leases, or by pools of revolving lines of credits. Asset -backed securities are structured as trusts in order to perfect a security interest in the underlying assets.
Bank Note
A senior, unsecured, direct obligation of a bank or U. S. branch of a foreign bank.
Banker' sAcceptance
Normally, a short- tem bill of exchange that is accepted as payment by banks engaged in financing trade of physical assets or merchandise.
Bond
A debt obligation of a firm or public entity. A bond represents the agreement to repay the debt in principal and, typically, in interest on the principal.
Callable Security
An investment security that contains an option allowing the issuer to retire the security prior to its final maturity date.
Certificate of Deposit
A short- tem, secured deposit in a financial institution that usually returns principal and interest to the lender at the end of the loan period. Certificates of Deposit ( CDs) differ in terms of collateralization and marketability. Those appropriate to public agency investing include:
Negotiable Certificates of Deposit — Generally, short term debt instruments that usually pay interest and are issued by a bank, savings or federal association, state or federal credit union, or state - licensed branch of a
foreign bank. The majority of negotiable CDs mature
within six months while the average maturity is two weeks. Negotiable CDs are traded in a secondary market and are payable upon order to the bearer or initial depositor (investor).
Non -Negotiable Certificates of Deposit — CDs that carry a penalty if redeemed prior to maturity. A secondary market does exist for these non- negotiable CDs, but include a transaction cost that reduces returns to the investor. Non- negotiable CDs issued by banks and savings and loans are insured by the Federal Deposit Insurance Corporation up to the amount of $ 250, 00, including principal and interest. Amounts deposited above this amount may be secured with other forms of collateral through an agreement between the investor and the issuer. Collateral may include other securities including Treasuries or agency securities such as those issued by the Federal National Mortgage Association.
Commercial Paper
A short- term, unsecured promissory note issued by a
large corporation.
Corporate Notes and Bonds
Debt instruments, typically unsecured, issued by corporations, with original maturities in most cases greater than one year and less than ten years.
Federal Agency and Instrumentality Obligations
12 -
63 Obligations issued by a government -sponsored entity or a federally regulated institution.
Mortgage Pass -Through Obligations
Securities that are created when residential mortgages ( or other mortgages) are pooled together and undivided interests or participations in the stream of revenues associated with the mortgages are sold.
Municipal Notes, Bonds, and Other Obligations
Obligations issued by state and local governments to finance capital and operating expenses.
Notes
Debt obligations of a firm or public entity, usually maturing in less than ten years.
Repurchase Agreements
From the perspective of a local agency, the short term, often overnight, purchase of securities with an agreement to resell the securities at an agreed upon price.
Reverse Repurchase Agreements
Differs from a
repurchase agreement in the sense that a reverse repurchase agreement is an agreement to sell securities in return for cash with an agreement to repurchase the securities at an agreed upon price.
State and Local Investment Pools
The combined deposits of state and local agencies organized and operated by a state treasurer or a local official. These pools operate much like a mutual fund, with local agencies investing money together in order to increase efficiency and reduce costs.
State Noted, Bonds, and Warrants
Obligations ofthe State of California or another state government with different maturity lengths.
Zero -Interest Bond
A bond on which interest is not payable until maturity ( or earlier redemption), but compounds periodically to accumulate to a stated maturity amount. Zero -interest bonds are typically issued at a discount and repaid at par upon maturity.
Excerpted from Understanding Public Investment Reporting - A Handbook For Local Elected Officials, California Debt and Investment Advisory Commission, 2003. 13 -
64 pfml asset
management
Memorandum
To: Cari James, Director of Finance
Thomas Hedegard, Deputy City Manager
City of Lathrop
September 30, 2025
From: Allison Kaune, Relationship Manager
PFM Asset Management, a division of U. S. Bancorp Asset Management, Inc RE: 2025 Investment Policy Review
We have reviewed the City of Lathrop' sFiscal Year 2024-5 Investment Policy (the Policy"), as part of your annual review process. The Policy is comprehensive and follows the applicable California Government Code (" Code") sections regulating the investment of public funds. Since the Policy' sreview last year, there have been no relevant Code changes that would prompt a Policy change. However, this year, we are recommending several minor edits for your consideration.
The edits we are suggesting, which can be seen on pages 4 and 9 of the attached redlined Policy, do not materially change the Policy, but will bring the Policy more in line with California Government Code references and the City' scurrent practices.
Please let me know if you have any questions or if you would like to set up a time to discuss the review.
PFM Asset Management is a division of U. S. Bancorp Asset Management, Inc.
NOT FDIC INSURED : NO BANK GUARANTEE : MAY LOSE VALUE
ATTACHMENT'
65 C. •
PAGE LEFT
INTENTIONALLY
BLANK
66 ITEM 4. 6
CITY MANAGER' S REPORT
OCTOBER 13, 2025 CITY COUNCIL REGULAR MEETING
ITEM: TABLE SPONSORSHIP AT THE POLICE CHIEF' S
BLACK -TIE BALL, A NIGHT AMONG HEROES
RECOMMENDATION: Adopt Resolution Approving City Participation and Table Sponsorship at the Police Chief' s Black -Tie
Ball, A Night Among Heroes, by Manteca Police
Chief' s Foundation on November 1, 2025, in
Manteca, California
BACKGROUND:
The Manteca Police Chief' s Foundation ( Foundation) hosts an annual black -tie ball to help raise funding for their at -risk youth programs. The Foundation is staffed by Manteca police officers, police department staff, and community members who volunteer their time so that 100 percent of all funds raised go directly to programs that benefit the at -risk youth of the community. Through mentorship, intervention, education, vocational training, artistic expression, and athletic pursuits, the Foundation' s mission is to guide the youth of the community in making positive choices, setting aspirational goals, and providing support to help them achieve those goals.
The Lathrop Police Department believes in the mission of the Foundation because helping the at -risk youth in our neighboring City benefits the Lathrop community by reducing crime and gang related activities. When the youth are engaged in positive activities, the ripple effect leads to safer streets across all communities. Additionally, these types of collaborations strengthen the regional public safety networks and reinforces shared values of mutual support and cooperation among law enforcement agencies.
Staff reserved a table sponsorship that includes eight ( 8) dinner tickets. These tickets will first be provided to Councilmembers and Chief of Police. Any remaining tickets will be provided to Lathrop Police Department staff as chosen by the Chief of Police.
The cost for a table sponsorship is $ 1, 000. There are sufficient funds in the Lathrop Police Department' s adopted FY 2025/6 budget to cover the cost of table sponsorship.
Staff requests City Council approval for a table sponsorship at the Police Chief' sBlack - Tie BaII, A Night Among Heroes, by Manteca Police Chief' s Foundation on November 1, 2025, in Manteca, California.
REASON FOR RECOMMENDATION:
Helping the at -risk youth in our neighboring City benefits the Lathrop community by reducing crime and gang related activities, and the ripple effect leads to safer streets 67 CITY MANAGER' SREPORT PAGE 2
OCTOBER 13, 2025 CITY COUNCIL REGULAR MEETING
TABLE SPONSORSHIP AT THE POLICE CHIEF' SBLACK -TIE BALL, A NIGHT
AMONG HEROES
across all communities. Additionally, these types of collaborations strengthen the regional public safety networks and reinforces shared values of mutual support and cooperation among law enforcement agencies.
FISCAL IMPACT:
The cost of sponsoring a table at the Police Chief' s Black -Tie Ball, A Night Among adopted
Heroes event
FY 2025/6
is $ 1, 000.
budget
There
to
are
cover
sufficient
the cost
funds
of table
in the
sponsorship.
Lathrop Police Department' s
ATTACHMENTS:
A. Resolution Approving City Participation and Table Sponsorship at the Police Chief' s Black -Tie Ball, A Night Among Heroes, by Manteca Police Chief' s Foundation on November 1, 2025, in Manteca, California
B. Event Flyer - Police Chief' s Black Tie Ball, A Night Among Heroes 68 CITY MANAGER' S REPORT PAGE 3
OCTOBER 13, 2025 CITY COUNCIL REGULAR MEETING
TABLE SPONSORSHIP AT THE POLICE CHIEF' SBLACK -TIE BALL, A NIGHT
AMONG HEROES
APPROVALS:
c_- Sfephen Sealy
Chief of Police
Date
9/ 9/ 20,S
q/ z4/ ZsThomas Hedegard Date
Deputy City Manager
Cari Ja
Finance D rector
9 / 2 /..
Date
Salvador Navarrete Date
City Attorney
10 • 2•-z'
Stephen. Salvatore Date
City Manager
69 RESOLUTION NO. 25 -
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF LATHROP
APPROVING CITY PARTICIPATION AND TABLE SPONSORSHIP AT THE
POLICE CHIEF' SBLACK -TIE BALL, A NIGHT AMONG HEROES, BY MANTECA POLICE CHIEF' S FOUNDATION ON NOVEMBER 1, 2025, IN MANTECA,
CALIFORNIA
WHEREAS, the Manteca Police Chief' s Foundation ( Foundation) hosts an annual black -tie ball to help raise funding for their at -risk youth programs; and WHEREAS, the Foundation is staffed by Manteca police officers, police department staff, and community members who volunteer their time so that 100 percent of all funds raised go directly to programs that benefit the at -risk youth of the community; and
WHEREAS, through mentorship, intervention, education, vocational training, artistic expression, and athletic pursuits, the Foundation' smission is to guide the youth of the community in making positive choices, setting aspirational goals, and providing support to help them achieve those goals; and WHEREAS, the Lathrop Police Department believes in the mission of the Foundation because helping the at -risk youth in our neighboring City benefits the Lathrop community by reducing crime and gang related activities; and WHEREAS, when the youth are engaged in positive activities, the ripple effect leads to safer streets across all communities; and
WHEREAS, these types of collaborations strengthen the regional public safety networks and reinforces shared values of mutual support and cooperation among law enforcement agencies; and
WHEREAS, staff reserved a table sponsorship that includes eight ( 8) dinner tickets. The cost for the table sponsorship is $ 1, 000; and
WHEREAS,
adopted FY 2025/6
there
budget
are
to
sufficient
cover the
funds
cost of
in
the
the
table
Lathrop
sponsorship.
Police Department' s
NOW THEREFORE, BE IT RESOLVED, that the City Council of the City of Lathrop does hereby approve the City participation and table sponsorship at the Police Chief' sBlack -Tie Ball, A Night Among Heroes, by Manteca Police Chief' s Foundation on November 1, 2025, in Manteca, California.
70 The foregoing resolution was passed and adopted this 13th day of October 2025, by the following vote of the City Council, to wit:
AYES:
NOES:
ABSENT:
ABSTAIN:
Paul Akinjo, Mayor
ATTEST: APPROVED AS TO FORM:
Teresa Vargas, City Clerk Salvador Navarrete, City Attorney 71 MANTECA POLICE CHIEFS FOUNDATION
SATURDAY, NOVEMBER 1, 2025
DOORS OPEN AT 5: 30
100. 00 PER TICKET
I000.( K) RESERVED TABLE & EIGHT TICKETS
1500. 0 RESERVED TABLE, EIGHT TICKETS, RECOGNITION AT EVENT
AND TWO BOTTLES OF WINE
7 HE VERANDA GARDEN
2111 MOFFAT BLVD
MANTECA, CA
FOR TICKETS EMAIL SSCHLUER@MANTECA. GOV
OR CALL (209) 456- 8210
72 ITEM 4. 7
CITY MANAGER' SREPORT
OCTOBER 13, 2025 CITY COUNCIL REGULAR MEETING
ITEM: RATIFY EMERGENCY SERVICE CONTRACTS WITH
CLEAN HARBORS ENVIRONMENTAL SERVICES, INC.,
MP ENVIRONMENTAL SERVICES, INC., AND UTILITY
SERVICE COMPANY, INC. FOR THE BACKWASH TANK
AT THE LOUISE AVENUE WATER TREATMENT
FACILITY
RECOMMENDATION: Adopt Resolution to Ratify Emergency Service Contracts with Clean Harbors Environmental
Services, Inc., MP Environmental Services, Inc., and
Utility Service Company, Inc. for the Backwash Tank
at the Louise Avenue Water Treatment Facility
SUMMARY:
The Louise Avenue Water Treatment Facility removes arsenic and treats groundwater pumped from the City' s
water supply wells to drinking water standards. Staff have identified a damaged decanter arm and a compromised swing joint in the backwash tank at the LAWTF, rendering the facility inoperable and creating an emergency condition. Additionally, the removal and proper disposal of hazardous waste currently present in the tank is required to complete the repair and restore the facility to full operational status.
The tank repair qualifies as an emergency under Lathrop Municipal Code ( LMC) Section 2. 36. 080 (A)( 2) (A)( 3), which allows standard purchasing procedures to be bypassed in order to efficiently and promptly maintain essential public services and protect life, property, public health, safety, or welfare during unforeseen events.
Ratification of emergency service contracts with Clean Harbors Environmental Services, Inc. (Clean Harbors), MP Environmental Services, Inc. (MP Environmental) and Utility Services Company, Inc. (Utility Services) is requested for the removal and disposal of hazardous waste and emergency repairs to the backwash tank at the Louise Avenue Water Treatment Facility ( LAWTF). Due to the urgent nature of the repairs and the impact on essential water treatment operations, no additional quotes were obtained.
BACKGROUND:
An emergency service contract was executed with Clean Harbors on March 13, 2025, in the amount of $224, 755 for the removal and disposal of the hazardous waste from the backwash tank at the LAWTF. This work was necessary to allow Utility Services access to the tank to assess a damaged decanter arm.
73 CITY MANAGER' S REPORT PAGE 2
OCTOBER 13, 2025 CITY COUNCIL REGULAR MEETING
RATIFY EMERGENCY SERVICE CONTRACTS WITH CLEAN HARBORS
ENVIRONMENTAL SERVICES, MP ENVIRONMENTAL SERVICES AND UTILITY
SERVICE COMPANY FOR THE BACKWASH TANK AT THE LOUISE AVENUE
WATER TREATMENT FACILITY
Clean Harbors completed the initial portion of the hazardous waste removal but later requested an additional $ 583, 306 to complete the work. Due to the high cost, City staff sought a second quote from MP Environmental, which came in significantly lower at $ 115, 996. 00. As a result, an emergency service contract was executed with MP Environmental on July 8, 2025, to complete the remaining hazardous waste removal and disposal.
During a site visit on July 21, 2025, ahead of mobilization, MP Environmental identified eighteen Clean Harbor bins of hazardous waste were still on -site, previously removed from the City' s
backwash tank by Clean Harbors. Clean Harbors refused to remove the bins unless the City agreed to their additional contract request or empty and rinse the bins prior to pick up.
To address this, MP Environmental was asked, beyond their original scope, to transfer the hazardous waste from the Clean Harbor bins into their own dewatering bins, which will remain on -site for up to 90 days to allow the waste to dry before proper disposal.
As a result, staff are requesting ratification of two emergency service contracts with MP Environmental. First, $115, 996 for the removal and disposal of the hazardous waste remaining in the tank. Second, $91, 283 for the additional removal and disposal of the hazardous waste left in Clean Harbors bins.
Additionally, staff request ratification of an emergency service contract with Utility Service in the amount of $85, 302 for the replacement of the broken floating decanter and swing joint in the backwash tank. The decanter had split in half and the swing joint has seized, rendering the tank inoperable. The backwash tank is a critical component of the water treatment process. It pumps water backward through the filter media to remove accumulated particles and debris. The resulting dirty water is collected in the tank, which acts as a settling basin to separate clean water from hazardous sludge. The tank cannot be returned to service until these components are repaired.
Due to the urgent nature of the repairs and the impact on essential water treatment operations, no additional quotes were obtained. The work qualifies as an emergency under Lathrop Municipal Code ( LMC) Section 2. 36. 080 (A)( 2) (A) 3), which allows purchasing procedures to be bypassed when necessary to efficiently maintain essential public services or address unforeseeable events affecting life, property, public health, safety, or welfare.
RECOMMENDATION:
Staff recommend ratification of emergency service contracts with Clean Harbors, MP Environmental, and Utility Services for the removal and disposal of hazardous waste 74 CITY MANAGER' SREPORT PAGE 3
OCTOBER 13, 2025 CITY COUNCIL REGULAR MEETING
RATIFY EMERGENCY SERVICE CONTRACTS WITH CLEAN HARBORS
ENVIRONMENTAL SERVICES, MP ENVIRONMENTAL SERVICES AND UTILITY
SERVICE COMPANY FOR THE BACKWASH TANK AT THE LOUISE AVENUE
WATER TREATMENT FACILITY
and emergency repairs to the backwash tank at the LAWTF to restore it to operational status.
The backwash tank is essential to the operation of the water treatment plant and cannot be used until repairs are completed. Due to the urgent nature of the work, no additional quotes were obtained, as this contract qualifies as an emergency under Lathrop Municipal Code ( LMC) Section 2. 36. 080 (A)( 2) (A) 3). This section allows standard purchasing procedures to be bypassed to efficiently and promptly maintain essential public services, protect City property, and respond to unforeseen events impacting life, property, public health, safety or welfare.
FISCAL IMPACT:
The total cost of the emergency service contracts is $ 517, 336, allocated as follows:
Company Name Emergency Services Provided Cost
Clean Harbors Hazardous Waste Removal and Disposal 224, 755 MP Environmental Hazardous Waste Removal and Disposal 115, 996 MP Environmental Additional Hazardous Waste Removal and 91, 283 Disposal
Utility Services Company Backwash Tank Repairs 85, 302
TOTAL COST 517, 336
The total cost for these emergency contracts was carried forward from Fiscal Year 2024-025 to Fiscal Year 2025-026.
ATTACHMENTS:
A. Resolution to Ratify Emergency Service Contracts with Clean Harbors Environmental Services, MP Environmental Services for the Removal and Disposal of Hazardous Waste to Facilitate Emergency Maintenance and Repairs by the Utility Service Company for the Backwash Tank at the Louise Avenue Water Treatment Facility
B. Emergency Service Contract with Clean Harbors Environmental Services Inc., to Provide Emergency Removal and Disposal of Hazardous Waste from the Backwash Tank at the Lathrop Water Treatment Facility
C. Emergency Service Contract with MP Environmental Services, Inc., for the Emergency Removal and Disposal of Hazardous Waste from the Backwash Tank at the Lathrop Water Treatment Facility
75 CITY MANAGER' S REPORT PAGE 4
OCTOBER 13, 2025 CITY COUNCIL REGULAR MEETING
RATIFY EMERGENCY SERVICE CONTRACTS WITH CLEAN HARBORS
ENVIRONMENTAL SERVICES, MP ENVIRONMENTAL SERVICES AND UTILITY
SERVICE COMPANY FOR THE BACKWASH TANK AT THE LOUISE AVENUE
WATER TREATMENT FACILITY
D. Emergency Service Contract with MP Environmental Services, Inc., to Provide Emergency Removal and Disposal of Additional Hazardous Waste from the Backwash Tank at the Lathrop Water Treatment Facility
E. Emergency Service Contract with Utility Service Company to Replace the Floating Decanter and Swing Joint inside of the Backwash Tank at the Louise Avenue Water Treatment Facility
76 CITY MANAGER' SREPORT PAGE 5
OCTOBER 13, 2025 CITY COUNCIL REGULAR MEETING
RATIFY EMERGENCY SERVICE CONTRACTS WITH CLEAN HARBORS
ENVIRONMENTAL SERVICES, MP ENVIRONMENTAL SERVICES AND UTILITY
SERVICE COMPANY FOR THE BACKWASH TANK AT THE LOUISE AVENUE
WATER TREATMENT FACILITY
APPROVALS:
Greg ibson Date
Senior Civil Engineer
Brad aylor
City Engine
Date
9/. S/ mss
1// 7/ 20,5-
Cari Jar s Date
Finance Director
Michael King Date
Assistant City Manager
1 • i°l ZoZS
P- i S'- - --e-, z 5
Salvador Navarrete Date
City Attorney
Stephen 3. Salvatore
City Manager
to •Z -2:S"
Date
77 RESOLUTION NO. 25 -
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF LATHROP TO RATIFY
EMERGENCY SERVICE CONTRACTS WITH CLEAN HARBORS ENVIRONMENTAL SERVICES, INC., MP ENVIRONMENTAL SERVICES, INC., AND UTILITY SERVICE COMPANY, INC. FOR THE BACKWASH TANK AT THE LOUISE AVENUE
WATER TREATMENT FACILITY
WHEREAS, the Louise Avenue Water Treatment Facility removes arsenic and treats groundwater pumped from the City' s
water supply wells to drinking water
standards. Staff have identified a damaged decanter arm and a compromised swing joint in the backwash tank at the LAWTF, rendering the facility inoperable and creating an emergency condition. Additionally, the removal and proper disposal of hazardous waste currently present in the tank is required to complete the repair and restore the facility to full operational status; and
WHEREAS, ratification of emergency service contracts with Clean Harbors Environmental Services, Inc. (Clean Harbors), MP Environmental Services, Inc. (MP Environmental) and Utility Services Company, Inc. (Utility Services) is requested for the removal and disposal of hazardous waste needed to complete emergency maintenance and repairs for the backwash tank at the Louise Avenue Water Treatment Facility ( LAWTF); and
WHEREAS, the backwash tank cannot be used to support the water treatment plant until repairs are completed, therefore, no other quotes were obtained because this contract is declared an emergency pursuant to LMC 2. 36. 080 (A)( 2) (A)( 3) which states that purchasing procedures may be eliminated to efficiently and timely maintain essential public services and property and other unforeseeable events affecting the preservation of life, property, public health, safety or welfare; and WHEREAS, the total cost of the emergency service contracts is $ 517, 336 as follows:
Company Name Emergency Services Provided
Hazardous Waste Removal and Disposal
Cost
Clean Harbors 224, 755
MP Environmental Hazardous Waste Removal and Disposal 115, 996 MP Environmental Additional Hazardous Waste Removal and Disposal
91, 283
Utility Services Backwash Tank Repairs 85, 302
TOTAL COST 517, 336
and
WHEREAS, the cost of the emergency service contracts may be paid using funds budgeted for professional services under Water Fund 5620 for Fiscal Year 2025- 2026 which was carried forward from Fiscal Year 2024-025. 78 NOW THEREFORE, BE IT RESOLVED, the City Council of the City of Lathrop does hereby ratify four emergency service contracts as follows: with Clean Harbors Environmental Services in the amount of $ 244, 755 and with MP Environmental Services in the amount of $ 115, 996 for the removal and disposal of hazardous waste and $ 91, 281 for removal and disposal of additional hazardous waste; and with Utility Services Company in the amount of $ 85, 302 to complete emergency maintenance and repairs for the backwash tank at the Louise Avenue Water Treatment Facility LAWTF) for a total cost of $ 517, 336to be paid from Water Fund 5620. 79 The foregoing resolution was passed and adopted this 13th day of October 2025, by the following vote of the City Council, to wit:
AYES:
NOES:
ABSENT:
ABSTAIN:
Paul Akinjo, Mayor
ATTEST: APPROVED AS TO FORM:
Teresa Vargas, City Clerk Salvador Navarrete, City Attorney 80 ATTACHMENT B
City of
Office gibe ty anager 390 Towne mire Dih, e, Lilt op,
Phone ( 209) 941- 7220— Fax (209) 941- 7229
www. ci. lathrop. ca. us
NOTICE TO PROCEED
March I 2025
Clean Harbors Environmental Services, Inc.
1010 Commercial Street
San Jose, CA 95112
Re: Emergency Service Contract for Emergency Removal and Disposal of Hazardous Waste from the Backwash Tank at the Lathrop Water Treatment Facility ( LAWTF) Dear Mr. Fay:
Enclosed please find your original executed Emergency Service Contract to perform the Emergency Removal and Disposal of Hazardous Waste from the Backwash Tank at the Lathrop Water Treatment Facility (LAWTF). This is your Notice to Proceed to the attached Emergency Service Contract.
Should you have any questions regarding this project, please contact Frank Vallejo, the staff member directly involved with this project, at (209) 941- 7424.
Thank you,
Stephen J. Salvatore
City Manager
Copy: Teresa Vargas, City Clerk
Project File
81 Docusign Envelope ID: D160F589- 0125- 4A29- A934- 2B564CD2EAE9
EMERGENCY SERVICE CONTRACT BETWEEN
THE CITY OF LATHROP AND CLEAN HARBORS ENVIRONMENTAL SERVICES, INC.
TO PROVIDE EMERGENCY REMOVAL AND DISPOSAL OF HAZARDOUS WASTE FROM
THE BACKWASH TANK AT THE LATHROP WATER TREATMENT FACILITY( LAWTF) THIS SERVICE CONTRACT ( hereinafter " Contract") is made on March I'S , 2025, by and between the City of Lathrop, a municipal corporation of the State of California ( hereinafter City") and Clean Harbors Environmental Services, Inc. (hereinafter " Contractor"), whose Taxpayer Identification Number is 04- 2698999.
For and in consideration of the following covenants, terms and conditions, City and Contractor (the parties) agree:
SCOPE OF WORK
Contractor agrees to perform the Emergency Removal and Disposal of Hazardous Waste from the Backwash Tank at the LAWTF in accordance with the scope of work and fee proposal provided by the Contractor, attached hereto as Exhibit "A", and incorporated herein by reference.
Contractor agrees to diligently perform these services in accordance with the upmost standards of its profession and to City' ssatisfaction.
It is understood by both parties that the amount of hazardous waste to be disposed of as listed in the proposal is an estimate and the actual amount to be removed is unknown until the work has begun. Any additional work required beyond the scope of work and fee proposal provided by the contractor, attached hereto as Exhibit " A", shall be considered a change order and will require a written contract amendment signed by both parties.
The work is being performed as an emergency work as defined in Lathrop Municipal Code
2. 32.0. Due to eminent risk to health and safety, the City did not have adequate time to follow the public bid process. Pursuant to LMC 2. 36. 080, purchasing procedures may be eliminated in emergency situations to efficiently and timely maintain essential public services and to preserve property. Contractor agrees to complete the work to the satisfaction of City and subject to inspection, or its representatives.
CONTRACT PRICE
The City agrees to pay and the Contractor agrees to accept, in full payment for the work above agreed to be done based on time and materials basis not to exceed $ 224. 755. 00set forth in Exhibit "A", for the Emergency Removal and Disposal of Hazardous Waste from the Backwash Tank at the Lathrop Water Treatment Facility ( LAWTF).
TIME FOR PERFORMANCE
The effective date of this contract is March 14' , 2025, and the work shall be completed within 60 total working days of the issuance of the Notice to Proceed.
PERMITS; COMPLIANCE WITH LAW
The Contractor shall, at its expense, obtain all necessary permits, licenses, easements, etc., for the construction of the project, give necessary notices, pay all fees required by law, and comply with all laws, ordinances, rules and regulations relating to and applicable to the work and to the preservation of the public health and safety.
82 Docusign Envelope ID: D160F589- 0125- 4A29- A934- 2B564CD2EAE9 CITY OF LATHROP - CLEAN HARBORS ENVIRONMENTAL SERVICES, INC.
EMERGENCY REMOVAL AND DISPOSAL OF HAZARDOUS WASTE FROM THE BACKWASH TANK
AT THE LATHROP WATER TREATMENT FACILITY ( LAWTF)
INSPECTION BY CITY
The Contractor shall at all times maintain proper facilities and provide reasonable and safe access for inspection by the City to all parts of the work, and to the shops wherein the work is in preparation. Where the Specifications require work to be specially tested or approved, it shall not be tested or covered up without timely, written approval by the City.
Should any such work be covered up without such notice, approval, or consent, it must, if required by City, be uncovered for examination at the Contractor' sexpense.
NOTICE
Any notice from one party to the other under the Contract shall be in writing and shall be dated and signed by the party giving such notice or by a duly authorized representative of such party. Any such notice shall not be effective for any purpose whatsoever unless served in the following manner.
a) If the notice is given to the City, by personal delivery thereof to the City' s Director
of Public Works, or by depositing the same in the United States mail, enclosed in a sealed envelope, addressed to the City' s Director of Public Works, postage prepaid and certified;
b) If the notice is given to the Contractor, by personal delivery thereof to said Contractor or to its duly authorized representative at the site of the project, or by depositing the same in the United States mail, enclosed in a sealed envelope, addressed to the Contractor at the address set forth in the Contractor' sBid postage prepaid and certified; or
c) If the notice is given to the surety or any other person, by personal delivery to such surety or other person, or by depositing the same in the United States mail, enclosed in a sealed envelope, addressed to such surety or other person, as the case may be, at the address of such surety or person last communicated by it to the party giving the notice, postage prepaid and certified.
ACCIDENT PREVENTION
Precaution shall be exercised at all times for the protection of persons ( including employees) and property.
The safety provisions of applicable laws, building and construction codes shall be observed. Machinery, equipment, and other hazards shall be guarded or eliminated in accordance with the safety provisions of the Construction Safety Orders issued by the Occupational Safety and Health Standards Board of the State of California.
CONTRACTOR' SWARRANTY
The City shall not, in any way or manner, be answerable or suffer loss, damage, expense or liability for any loss or damage that may happen to said building, work, or equipment or any part thereof, or in, on, or about the same during its construction and before acceptance, except where such loss or damage is caused by City. Contractor warrants all work and materials to be free of defects whether performed
83 Docusign Envelope ID: D160F589- 0125- 4A29- A934- 2B564CD2EAE9 CITY OF LATHROP - CLEAN HARBORS ENVIRONMENTAL SERVICES, INC.
EMERGENCY REMOVAL AND DISPOSAL OF HAZARDOUS WASTE FROM THE BACKWASH TANK
AT THE LATHROP WATER TREATMENT FACILITY ( LAWTF)
or installed by it or by any subcontractor or supplier in the project which is the subject of this Contract.
APPRENTICES
d) The Contractor' s attention is directed to the provisions of Sections 1777. 5, 1777. 6, and 1777. 7of the California Labor Code conceming employment of apprentices by the Contractor or any subcontractor under him. In addition, Contractor shall obtain a certificate of apprenticeship before employing any apprentice pursuant to Sections 1777. 5, 1777. 6 and 1777. 7 of the California Labor Code. e) Information relative to apprenticeship standards, wage schedules, and other requirements may be obtained from the Director of Industrial Relations, ex officio the Administrator of Apprenticeship, San Francisco, Califomia, or from the Division of Apprenticeship Standards and its branch offices.
f) Knowing violations of Section 1777. 5 will result in forfeiture not to exceed one hundred dollars ($ 100) for each calendar day of non- compliance pursuant to Section 1777. 7.
HOURS OF WORK
Eight ( 8) hours of work in any calendar day shall constitute a legal days work. The Contractor and each subcontractor shall forfeit, as penalty to the City, twenty- fivedollars ($ 25) for each worker employed in the execution of work on the Project by the Contractor or any subcontractor under him for each calendar day during which such worker is required or permitted to work more than eight ( 8) hours in any one calendar day and forty ( 40) hours in any calendar week in violation of the provisions of the Labor Code, and in particular, Section 1810 to Section 1815, thereof, inclusive, except that work performed by employees of the Contractor and his subcontractors in excess of eight hours per day at not less than one and one half times the basic rate of pay, as provided in Labor Code section 1815.
PAYROLL RECORDS
Pursuant to Labor Code section 1776, as amended from time to time, the Contractor and each subcontractor shall keep records showing the name, address, social security number, work classification, straight time and overtime hours paid each day and week, and the actual per diem wages paid to each journeyman, apprentice, worker or other employee employed by him or her in connection with the work.
The certified payroll records shall be on forms provided by the Division of Labor Standards Enforcement or shall contain the same information as the forms provided by the Division.
The payroll records shall be certified and shall be available for inspection at all reasonable hours at the principal office of the Contractor on the following basis:
g) A certified copy of the employee' s payroll records shall be made available for inspection or furnished to such employee or his or her authorized representative on request.
84 Docusign Envelope ID: D160F589- 0125- 4A29- A934- 2B564CD2EAE9 CITY OF LATHROP - CLEAN HARBORS ENVIRONMENTAL SERVICES, INC.
EMERGENCY REMOVAL AND DISPOSAL OF HAZARDOUS WASTE FROM THE BACKWASH TANK
AT THE LATHROP WATER TREATMENT FACILITY ( LAWTF)
h) A certified copy of all payroll records shall be made available for inspection or furnished upon request, or as required by Labor Code section 1771. 7to the City, the Division of Labor Standards Enforcement and the Division of Apprenticeship Standards of the Department of Industrial Relations.
i) A certified copy of all payroll records shall be made available upon request to the public for inspection or copies thereof made; provided, however, that if request by the public shall be made through either the City, the Division of Apprenticeship Standards, or the Division of Labor Standards Enforcement, if as requested, payroll records have been provided pursuant to paragraph ( b), the requesting party shall, prior to being provided the records, reimburse the cost of preparation by the Contractor, subcontractors and the entity through which the request was made.
The public shall not be given access to such records at the principal office of the Contractor.
The Contractor shall file a certified copy of the payroll records with the entity that requested such records within ten ( 10) calendar days after receipt of a written request.
Any copy of records made available for inspection as copies and furnished upon request to the public or the City, the Division of Apprenticeship Standards, or the Division of Labor Standards Enforcement, shall be marked or obliterated in such a manner as to prevent disclosure of an individual' sname, address, and social security number. The name and address of the Contractor or any subcontractor performing work on the Project shall not be marked or obliterated.
The Contractor shall inform the City of the location of the payroll records, including the street address, city and county, and shall, within five ( 5) calendar days, provide a notice of a change of location and address.
In the event of noncompliance with the requirements of this section, the Contractor shall have ten ( 10) calendar days in which to comply subsequent to receipt of written notice specifying in what respects the Contractor must comply with this section. Should noncompliance still be evident after such ten ( 10) calendar day period, the Contractor shall, as a penalty to the City, forfeit twenty- five dollars ($ 25) for each calendar day, or portion thereof, for each worker until strict compliance is effectuated.
Upon the request of the Division of Labor Standards Enforcement, such penalties shall be withheld from payments due Contractor.
PREVAILING WAGES
i) The Contractor is aware of the requirements of California Labor Code Sections 1720 et seq. and 1770 et seq., as well as California Code of Regulations, Title 8, section 16000 et seq. ("Prevailing Wage Laws") which require the payment of prevailing wage rates and the performance of other requirements on certain " public works" and " maintenance" projects. Since this Contract involves an applicable public works" or " maintenance" project, as defined by the Prevailing Wage Laws, and since the total compensation is $ 1, 000 or more, Contractor agrees to fully comply with such Prevailing Wage Laws. The Contractor shall obtain a copy of the prevailing rates of per diem wages applicable to the work to be performed by subcontractors from the website of the Division of Labor Statistics and Research
85 Docusign Envelope ID: D160F589- 0125- 4A29- A934- 2B564CD2EAE9 CITY OF LATHROP - CLEAN HARBORS ENVIRONMENTAL SERVICES, INC.
EMERGENCY REMOVAL AND DISPOSAL OF HAZARDOUS WASTE FROM THE BACKWASH TANK
AT THE LATHROP WATER TREATMENT FACILITY (LAWTF)
of the Department of Industrial Relations located at
http:// www. dir. ca. 00v/ dlsr/ PWD/ index. htm. In the altemative, the City shall provide Contractor with a copy of the prevailing rates of per diem wages applicable to the work to be performed by subcontractors.
Contractor shall make copies of the prevailing rates of per diem wages for each craft, classification or type of worker needed to perform work on the Project available to interested parties upon request and shall post copies at the Contractor' sprincipal place of business and at the Project site.
Contractor shall defend, indemnify and hold the City, its elected officials, officers, employees and agents free and harmless from any claims, liabilities, costs, penalties or interest to the extent caused by Contractor' sfailure to comply with the Prevailing Wage Laws.
k) The Contractor and each subcontractor shall forfeit as a penalty to the City not more than fifty dollars ($ 50) for each calendar day, or portion thereof, for each worker paid less than the stipulated prevailing rate for any work done by him, or by any subcontract under him, in violation of the provisions of the California Labor Code. The difference between such stipulated prevailing wage rate and the amount paid to each worker for each calendar day or portion thereof for which each worker was paid less than the stipulated prevailing wage rate shall be paid to each worker by the Contractor.
INSURANCE
On or before beginning any of the services or work called for by any term of this Agreement, CONTRACTOR, at its own cost and expense, shall carry, maintain for the duration of the Agreement, and provide proof thereof that is acceptable to the CITY the insurance specified in subsections (a) through ( c) below with insurers and under forms of insurance satisfactory in all respects to the CITY. CONTRACTOR shall not allow any subcontractor to commence work on any subcontract until all insurance required of the CONTRACTOR has also been obtained for the subcontractor. Verification of this insurance shall be submitted and made part of this Agreement prior to execution.
a) Workers' Compensation. CONTRACTOR shall, at CONTRACTOR' Ssole cost and expense, maintain Statutory Workers' Compensation Insurance and Employer' s Liability Insurance for any and all persons employed directly or indirectly by CONTRACTOR. Said Statutory Workers' Compensation Insurance and Employer' s Liability Insurance shall be provided with limits of one million dollars ($ 1, 000,0). In the alternative, CONTRACTOR may rely on a self- insurance program to meet these requirements provided that the program of self- insurance complies fully with the provisions of the Califomia Labor Code. The insurer, if insurance is provided, or the CONTRACTOR, if a program of self- insurance is provided, shall waive all rights of subrogation against the CITY for loss arising from work performed under this Agreement.
b) Commercial General and Automobile Liability Insurance. CONTRACTOR, at CONTRACTOR' Sown cost and expense, shall maintain commercial
86 Docusign Envelope ID: 0160F589- 0125- 4A29- A934- 2B564CD2EAE9 CITY OF LATHROP - CLEAN HARBORS ENVIRONMENTAL SERVICES, INC.
EMERGENCY REMOVAL AND DISPOSAL OF HAZARDOUS WASTE FROM THE BACKWASH TANK
AT THE LATHROP WATER TREATMENT FACILITY ( LAWTF)
general and automobile liability insurance for the period covered by this Agreement in an amount of one million dollars per occurrence 1, 000,0), combined single limit coverage for risks associated with the work contemplated by this Agreement.
If Commercial General Liability Insurance or an Automobile Liability form or other form with a general aggregate limit is used, either the general aggregate limit shall apply separately to the work to be performed under this Agreement or the general aggregate limit shall be twice the required occurrence limit. Such coverage shall include but shall not be limited to, protection against claims arising from bodily and personal injury, including death resulting therefrom, and damage to property resulting from activities contemplated under this Agreement, including the use of owned and non - owned automobiles.
Coverage shall be as broad as Insurance Services Office Commercial General Liability occurrence form CG 0001 ( ed. 11/ 88) and Insurance Services Office Automobile Liability form CA 0001 ( ed. 12/ 90) Code 1 ( any auto).
Each of the following shall be included in the insurance coverage or added as an endorsement to the policy:
i) CITY, its officers, employees are to be covered as insured with respect to each of the following: liability arising out of activities performed by or on behalf of CONTRACTOR, products and
completed operations of CONTRACTOR; premises owned,
occupied or used by CONTRACTOR. The coverage shall contain no special limitations on the scope of protection afforded to CITY, its officers, employees, agents.
ii) The insurance shall cover on an occurrence or an accident basis, and not on a claim made basis.
iii) An endorsement must state that coverage is primary insurance and that no other insurance affected by the CITY will be called upon to contribute to a loss under the coverage.
iv) Any failure of CONTRACTOR to comply with reporting provisions of the policy shall not affect coverage provided to CITY and its officers, employees, agents, and volunteers.
v) Insurance is to be placed with California -admitted insurers with a Best' srating of no less than A: VII.
vi) Notice of cancellation or non - renewal must be received by CITY at least thirty days prior to such change.
c) Deductibles and Self -Insured Retentions. CONTRACTOR shall disclose the self -insured retentions and deductibles before beginning any of the services or work called for by any term of this Agreement.
87 Docusign Envelope ID: D160F589- 0125- 4A29- A934- 2B564CD2EAE9 CITY OF LATHROP - CLEAN HARBORS ENVIRONMENTAL SERVICES, INC.
EMERGENCY REMOVAL AND DISPOSAL OF HAZARDOUS WASTE FROM THE BACKWASH TANK
AT THE LATHROP WATER TREATMENT FACILITY ( LAWTF)
d) Notice of Reduction in Coverage. In the event that any coverage required under subsections ( a), (b), or (c) of this section of the Agreement is reduced, limited, or materially affected in any other manner, CONTRACTOR shall provide
written notice to CITY at CONTRACTOR' Searliest possible opportunity and in no case later than five days after
CONTRACTOR is notified of the change in coverage.
e) In addition to any other remedies CITY may have if
CONTRACTOR fails to provide or maintain any insurance
policies or policy endorsements to the extent and within the time herein required, CITY may, at its sole option:
i) Order CONTRACTOR to stop work under this
Agreement or withhold any payment which becomes
due to CONTRACTOR hereunder, or both stop work
and withhold any payment, until CONTRACTOR
demonstrates compliance with the requirements
hereof;
ii) Terminate this Agreement.
Exercise of any of the above remedies, however, is an alternative to other remedies CITY may have and is not the exclusive remedy for CONTRACTOR' Sbreach.
INDEMNIFICATION
Contractor agrees to protect, defend, indemnify and hold City, its City Council members, officers, employees, engineer, and consultants harmless from and against any and all claims, demands, liabilities, losses, damages, costs, expenses, liens, penalties, suits, orjudgments, arising in whole or in part, directly or indirectly, at any time from any injury to or death of persons or damage to property to the extent caused by the willful or negligent act or omission of Contractor, or which results from Contractor' s
noncompliance with any Law respecting the condition, use, occupation or safety of the Project site, or any part thereof, or which is caused by Contractor' s material failure to do anything required under this Contract or for doing anything which Contractor is required not to do under this Contract, except as may arise from the willful or negligent act or omission of City or any of its City Council members, officers, employees.
This indemnification shall extend to any and all claims, demands, or liens made or filed by reason of any construction, renovation, or remodeling work performed by Contractor under this Contract at any time during the term of this Contract, or arising thereafter.
LIMITATION OF LIABILITY.
NOTWITHSTANDING ANY TERM OR CONDITION OF THIS AGREEMENT TO THE
88 Docusign Envelope ID: D160F589- 0125- 4A29- A934- 2B564CD2EAE9 CITY OF LATHROP - CLEAN HARBORS ENVIRONMENTAL SERVICES, INC.
EMERGENCY REMOVAL AND DISPOSAL OF HAZARDOUS WASTE FROM THE BACKWASH TANK
AT THE LATHROP WATER TREATMENT FACILITY ( LAWTF)
CONTRARY AND, TO THE GREATEST EXTENT ALLOWED BY LAW, CITY AGREES THAT
CONTRACTOR' SAGGREGATE LIABILITY TO CITY, TO ANYONE CLAIMING BY, THROUGH,
OR UNDER CITY, AND TO ANY THIRD PARTY FOR ANY AND ALL INJURIES, CLAIMS,
DEMANDS, LOSSES, EXPENSES, OR DAMAGES, OF WHATEVER KIND OR CHARACTER
INCLUDING BUT NOT LIMITED TO AN ACTION OR CLAIM BASED ON CONTRACT,
WARRANTY, EQUITY, TORT, STRICT LIABILITY, OR ANY OTHER THEORY OF LIABILITY
WHATSOEVER, ARISING OUT OF OR IN ANY WAY RELATED TO THIS AGREEMENT, THE
WORK/ SERVICES, OR THE PROJECT SITE, SHALL BE LIMITED TO THE SPECIFIC INSURANCE LIMITS REQUIRED TO BE CARRIED HEREUNDER.. Notwithstanding anything to the contrary, neither party shall be liable to the other for any indirect, incidental, consequential, special, punitive, or exemplary damages, including but not limited to lost profits, lost data, lost revenues, loss of use, loss of business opportunity, or diminution in value, whether arising under contract, warranty, equity, tort, strict liability, or any other theory of liability whatsoever, and whether or not the possibility of such damages has been disclosed or could have been reasonably foreseen.
NON -CONFORMING WASTE.
If the work involves the transportation and disposal of waste, the City shall provide Contractor with a description of said waste (" Waste Profile"). Upon approval by Contractor, the Waste Profile shall be incorporated into and become a part of this Agreement. Waste materials discovered by Contractor to be non -conforming, if in Contractor' s
possession, shall be prepared for lawful
transportation by Contractor and returned to the City within a reasonable time after rejection by Contractor, unless the parties agree to an alternative and lawful manner to dispose of the waste materials. The City shall pay Contractor at agreed rates for the handling, loading, preparing, transporting, storing and caring for and, if applicable, disposing of such non -conforming waste materials. Title, risk of loss and all other incidents of ownership to non -conforming wastes shall remain at all times with the City. Waste materials shall be considered non -conforming if the waste materials are not properly packaged or labeled; or if the waste materials contain constituents or have characteristics or properties not disclosed on the Waste Profile. Notwithstanding anything to the contrary, City shall be solely responsible for any and all losses, liabilities, claims, penalties, forfeitures, suits, and the cost and expenses incident thereto ( including cost of defense, settlement and reasonable attorneys' fees) which Contractor may hereafter incur, or pay out as a result of death or bodily injuries to any person, destruction or damage to any property, contamination of or adverse effects on the environment or any violation of applicable federal, state and local laws, regulations, by- laws or ordinances arising out of or related to non -conforming waste materials.
TERMINATION.
Either party may terminate this Agreement at any time, without cause and for convenience, upon thirty (30) days written notice to the other party.
PAYMENT.
The City shall make all payments to Contractor within thirty ( 30) days of receipt of invoice from Contractor.
89 Docusign Envelope ID: D160F589- 0125- 4A29- A934- 2B564CD2EAE9 CITY OF LATHROP - CLEAN HARBORS ENVIRONMENTAL SERVICES, INC.
EMERGENCY REMOVAL AND DISPOSAL OF HAZARDOUS WASTE FROM THE BACKWASH TANK
AT THE LATHROP WATER TREATMENT FACILITY ( LAWTF)
SEVERABILITY
Nothing contained in the Contract shall be construed so as to require the commission of any act contrary to law. Should a conflict arise between any provision contained herein and any present or future statute, law, ordinance or regulation contrary to which the parties have no legal right to contract or act, the latter shall prevail and the provision of this Contract which is affected shall be curtailed and limited but only to the extent necessary to bring it within the requirements of the law. If such curtailment or limitation is not possible, the affected provision shall be of no force and effect. Except as aforesaid, such illegality shall not affect the validity of this Contract.
COMPLETE AGREEMENT
This Contract supersedes any and all agreements, either oral or in writing, between the Parties with respect to the subject matter herein.
Each party to this Contract acknowledges that no representation by any party which is not embodied herein or any other agreement, statement, or promise not contained in this Contract shall be valid and binding.
INTERPRETATION
I) The parties hereto acknowledge and agree that each has been given the opportunity to independently review this Contract with legal counsel, and/ or has the requisite experience and sophistication to understand, interpret and agree to the particular language of the provisions of the Contract.
In the event of a controversy or dispute between the parties concerning the provisions herein, this document shall be interpreted according to the provisions herein and no presumption shall arise concerning the draftsmanship of such provision.
APPLICABLE LAW
m)
n) The parties hereto understand and agree that the terms of this Contract, and its Exhibits, have been negotiated and executed within the State of California and shall be governed by and construed under the laws of the State of California. o) In the event of a dispute concerning the terms of this Contract, the parties hereto expressly agree that the venue for any legal action shall be with the appropriate court in the County of San Joaquin, State of California.
SIGNATURES
The individuals executing this Agreement represent and warrant that they have the right, power, legal capacity, and authority to enter into and to execute this Agreement on behalf of the respective legal entities of the CONSULTANT and the CITY. This agreement shall inure to the benefit of and be binding upon the parties hereto and their respective successors and assigns.
90 Docusign Envelope ID: D160F589- 0125- 4A29- A934- 2B564CD2EAE9 CITY OF LATHROP - CLEAN HARBORS ENVIRONMENTAL SERVICES, INC.
EMERGENCY REMOVAL AND DISPOSAL OF HAZARDOUS WASTE FROM THE BACKWASH TANK
AT THE LATHROP WATER TREATMENT FACILITY ( LAWTF)
Approved as to Form:
Recommended for Approval:
Approved by:
Contractor:
City of Lathrop
City Attorney
lo , %- ot s
Salvador Navarrete Date
City of Lathrop
Assistant City Manager
Michael King
City of Lathrop
390 Towne Centre Drive
Lathrop, CA 95330
3 . O • Lois'
Date
Ste e en J. Salvatore
City Manager
3 ' 116
Date
Clean Harbors Environmental Services, Inc.
1010 Commercial Street
San Jose, CA 95112
209) 292- 3328
Fed ID # 04- 2698999
Lathrop Business License # ODOTIV2025
Signed by:
3/ 7/ 2025
Date
Marc McReynolds Senior vice President
Print Name and Title
Doeusigned by:
xaS F. racy III) VP Vis{ vtit Ikb4zertizotatifortAia.
Signature `u` ag.._
Date
Thomas F. Fay, III, VP District brothern California
Print Name and Title
91 Docusign Envelope ID: D160F589- 0125- 4A29- A934- 2B564CD2EAE9 letanHarba
Clean Harbors Industrial Services, Inc.
1010 Commercial Street
San Jose, CA 95112
www. cleanharbors. com
January 9, 2025
Attn: Mr. Chris Hart
Lathrop City of
390 Town Centre Drive
Lathrop, CA 95330
Quote # 4716076, Lathrop City of, Lathrop, CA
Dear Mr. Hart:
EXHIBIT A
Thank you for considering Clean Harbors Industrial Services, Inc. for your industrial service needs.
We provide a broad range of services including hazardous and non -hazardous waste transportation and disposal, laboratory chemical packing, emergency response, field services and industrial maintenance. We are pleased to provide this proposal based on the scope of work outlined below.
Scope:
CHES will provide a crew to clean out tank.
CHES will use an air mover to remove slurry from tank.
CHES will collect waste in vacuum bins.
CHES will use a rocket to move the bins around and hall to GM Facility.
Upon being emptied at GM, vac bins will be rinsed and returned to customer site for final CSE cleaning of each vac bin.
CHES will provide CSE crew to make entry and clean out tank.
We offer our clients a broad spectrum of industrial services and the ability to dispose of hazardous material at or through a Clean Harbors' owned and operated facility. In addition to managing your waste streams, a Clean Harbors' professional can assist you with:
Waste Transportation & Disposal
Laboratory Chemical Packing
Field Services
24 -Hour Environmental Emergency Response
Industrial Services
InSite Services
I look forward to servicing your industrial needs. If you have any questions or need further assistance, you may reach me at the number below.
Sincerely,
Dwight Welch Jr.
Field Service Account Manager
Phone: 209.2. 3328
welch. dwight@cleanharbors. com
People and Technology Creating a Safer, Cleaner Environment" 92 Docusign Envelope ID: D160F589- 0125- 4A29- A934- 2B564CD2EAE9 eanM
January 9, 2025
Clean Harbors Quote #4716076
QUOTE CONDITIONS
The proposal is based on the following assumptions and site conditions. Any work which falls outside of the assumptions will constitute work beyond the intended scope and be completed upon mutually satisfactory terms.
Assumptions:
Prevailing wage rates are included on this estimate.
CHES to provide shipping documents to assist with transportation.
This proposal will remain valid for (30) days from this date.
City ofLathrop must provide access to facility during normal business hours.
City ofLathrop will provide water source.
CHES & City of Lathrop agrees that the number of loads per day depends on receiving facilities capacity.
Disposal cost will be pending profile approval
All parties agree, once vac bins are empty, they will be returned to customer site for CSE cleaning of Vac bin before bin is completely removed from site.
The quantity of waste material quoted is an estimate; quantity exceeding the estimated amount will be charged based on quoted rates.
Waste materials not conforming to parameters of established waste profiles may be rejected by the designated disposal facility and applicable charges will apply. c3 " People and Technology Creating a Safer, Cleaner Environment" 93 Docusign Envelope ID: D160F589- 0125- 4A29- A934- 2B564CD2EAE9 IeanHa .
January 9, 2025
Clean Harbors Quote #4716076
QUOTE SUMMARY
Description kuiount
TASK 1: TANK DECONTAMINATION & PUMP OUT COST
TASK 2: VACUUM BIN CSE CLEAN OUT LABOR COST
TASK 3: BULK CBPS TO GM DISPOSAL & TRANSPORTATION ( EST. 7 COST) TASK 4: DRUM DISPOSAL & TRANSPORTATION COST
Subtotal
Estimated Recovery Fee
Estimated Waste Fee
Estimated CARRAA Fee
QUOTE TOTAL
80, 933. 00
22, 817. 00
82,98. 90
3, 013.5
189, 661. 95
30,45. 91
5.2 4, 741. 55
224, 754. 92
People and Technology Creating a Safer, Cleaner Environment" 94 Docusign Envelope ID: D160F589- 0125- 4A29- A934- 2B564CD2EAE9 leUL. MarliEs' s
January 9, 2025
Clean Harbors Quote #4716076
TASK 1: TANK DECONTAMINATION & PUMP OUT COST
Amount
1 Description
Confined Space Rescue
Supervisor
Qty/ UOM
8 hour
Days
5 Unit Price Extended Total
84. 00 $ 3,60. 0
1 Confined Space Rescue
Supervisor, Overtime
2 hour 5 128. 00 1, 280. 0
2 Equipment Operator 8 hour 5 90. 00 7, 200. 0
2 Equipment Operator, Overtime 2 hour 5 132. 50 2, 650. 0 5 Field Technician 8 hour 5 84. 00 16, 800. 0
5 Field Technician Overtime 2 hour 5 107. 50 5, 375. 00 2 3000psi Hot Water Pressure
Washer
5 day n/ a 300. 00 3, 000.
1 4 Gas/ 5 Gas Meter 5 day n/ a 140. 00 700. 00
1 Breathing Air System 5 day n/ a 580. 00 2, 900. 0
1 Confined Space Entry Gear
Retrieval & Rescue Equip)
5 day n/ a 205. 00 1, 025.0
1 Electric Blower 5 day n/ a 80. 00 400. 0
1 High Powered Vacuum
Truck/ Cusco
10 hour 5 198. 00 9,00. 0
2 Level B w/ CPF3 or Saranex
Suit/ Changeout
1 each n/ a 271. 00 542. 00
3 Level D Modified W/ Poly- Coated
Tyvek/ Disp Nomex
5 day n/ a 57. 00 855. 00
1 PickupNan/ Car/rew Cab 5 day n/ a 288. 00 1, 440. 0
1 Tractor w/ Rolloff Trailer 10 hour 5 98. 00 4, 900. 0 1 Vehicle Truck Gear F250 diesl 5 day n/ a 215. 00 1, 075.0 7 Containment Berm - 12' x 25' 30 day n/ a 28. 00 5, 880. 0 l Hose - Flex ADS, 6 in X 100 ft
Ro11
1 roll n/ a 575. 00 575. 00
1 Misc. Handtools 5 day n/ a 150. 00 750. 00
1 Tank Wash 1 each n/ a 876. 00 876. 00
7 Vacuum Box, 20 Yd 30 day n/ a 45. 00 9, 450. 0
Total 80, 933. 00
TASK 1: TOTAL ESTIMATE
Estimated Recovery Fee
Estimated CARRAA Fee
Estimated total, including Fees
80, 933. 00
12, 949. 28
2, 023. 3
95,05. 61
People and Technology Creating a Safer, Cleaner Environment" 95 Docusign Envelope ID: D160F589- 0125- 4A29- A934- 2B564CD2EAE9 e ilar Oi
January 9, 2025
Clean Harbors Quote #4716076
TASK 2: VACUUM BIN CSE CLEAN OUT LABOR COST
Amount
1 Description
Confined Space Rescue
Supervisor
Qty/ UOM
8 hour
Days
3 Unit Price Extended Total
84. 00 $ 2, 016.0
1 Confined Space Rescue
Supervisor, Overtime
2 hour 3 128. 00 768. 00
1 Equipment Operator 8 hour 3 90. 00 2, 160. 0
1 Equipment Operator, Overtime 2 hour 3 132. 50 795. 00 3 Field Technician 8 hour 3 84. 00 6, 048.0
3 Field Technician Overtime 2 hour 3 107. 50 1, 935. 00 2 3000psi Hot Water Pressure
Washer
3 day n/ a 300. 00 1, 800. 0
1 4 Gas/ 5 Gas Meter 3 day n/ a 140. 00 420. 00
1 Confined Space Entry Gear
Retrieval & Rescue Equip)
3 day n/ a 205. 00 615. 00
j 1 Electric Blower 3 day n/ a 80. 00 240. 00
4 Level D Modified W/ Po1y- Coated
Tyvek/ Disp Nomex
3 day n/ a 57. 00 684. 00
1 PickupNan/ Car/rew Cab 3 day n/ a 288. 00 864. 00
1 Pump - Electric Drum 3 day n/ a 108. 00 324. 00
1 Tractor w/ Rolloff Trailer 10 hour 3 98. 00 2, 940. 0 1 Vehicle Truck Gear F250 diesl 3 day n/ a 215. 00 645. 00 55 G / 205 L Steel Drum,
Reconditioned 1A2/ Y1. 2/ 100
17- H)
1 each n/ a 113. 00 113. 00
1 Misc. Handtools 3 day n/ a 150. 00 450. 00
Total 22, 817. 00
TASK 2: TOTAL ESTIMATE
Estimated Recovery Fee
Estimated CARRAA Fee
Estimated total, including Fees
22, 817. 00
3, 650. 72
570. 43
27, 038. 15
TASK 3: BULK CBPS TO GM DISPOSAL & TRANSPORTATION ( EST. 7 COST)
DISPOSAL
People and Technology Creating a Safer, Cleaner Environment" 96 Docusign Envelope ID: D160F589- 0125- 4A29- A934- 2B564CD2EAE9 leUtlarlat
January 9, 2025
Clean Harbors Quote # 4716076
Profile / \\ aste Code NN aste Description Price/ NMI
CBPS SEMI - SOLIDS TO HAZARDOUS LANDFILL $ 305. 00 / ton' The following minimum price( s) will apply:
ProMe/ Waste Code UOM
CBPS container
TRANSPORTATION
Transpurtatiun Hub
Grassy Mountain, UT Facility
CARRAA Fee ( Total for this Task):
Minimum Price
4, 575. 00
chicle pc
Rollo ff Trailer Double
Container
Unit Kale
0 1,75. 60
1) A demurrage charge of $115. 00 per hour will apply for each hour m excess of 1 hour( s).
ACCESSORIALS
Per Diem / Subsistence
Washout of Rolloff, hitermodal or Dump Trailer
175. 00 per Day
375. 00 Each
WASTE CLASSIFICATIONS SPECIFICATIONS
t nil of N1casurc
Load
Waste Code Description
CBPS Semi -Solids To Hazardous Landfill
Source of PCB < 50 ppm
Must not be prohibited from landfill
Must not require stabilization or encapsulation
PRIMARY DISPOSAL METHOD: SOLIDIFICATION/ SECURE
CHEMICAL LANDFILL
TASK 4: DRUM DISPOSAL & TRANSPORTATION COST
DISPOSAL
Profile/ Waste Code Waste Description UO\ I Price Total CNO
CNOS
NON HAZARDOUS SOLID 4 55 gallon drum
NON HAZARDOUS SEMI - SOLIDS 4 55 gallon drum
142. 00 $ 568. 00
171. 00 $ 684. 00
Total $ 1, 252. 00
People and Technology Creating a Safer, Cleaner Environment" 97 Docusign Envelope ID: D160F589- 0125- 4A29- A934- 2B564CD2EAE9 leaniarbole
January 9, 2025
Clean Harbors Quote #4716076
Amount Description Qty/ UOM Days Unit Price Extended Total 1 Drum Head Vacuum System, 1 day n/ a $ 58. 00 $ 58. 00 Electric
8 55 G / 205 L Steel Drum,
Reconditioned 1A2/ Y1. 2/ 100
17- H)
1 each n/ a $ 113. 00 $ 904. 00
TRANSPORTATION
Total $ 962. 00
Dispatch Location Qty Price UO' 11 1 oral
West Sacramento, CA Hub 8
Minimum charge $ 799. 05 per trip.
A demurrage charge of $154. 573 per hour will apply as follows:
Number of Allowable
Containers Loading Time
1to10
llto15
16 to 25
26 to 35
36to40
41to45
46to50
51 to 80
0. 5 hour( s)
0. 75 hour( s)
1 hour( s)
1. 25 hour( s)
1. 5 hour( s)
1. 5 hour( s)
1. 75 hour( s)
2 hour( s)
TASK 4: TOTAL ESTIMATE
Estimated Recovery Fee
Estimated Waste Fee
Estimated CARRAA Fee
Estimated total, including Fees
WASTE CLASSIFICATIONS SPECIFICATIONS
79.8 container 799. 05
3, 013.5
482. 09
5.2 75. 33
3, 575. 97
Waste Code Description
CNO Non Hazardous Solid
Non -pourable at 70° F
No free liquid
Must be able to pass ( paint filter/ penetration) tests Must be able to be landfilled
Biodegrade -able absorbents will be stabilized prior to land No herbicide, pesticides, or cyanides
People and Technology Creating a Safer, Cleaner Environment" 98 Docusign Envelope ID: D160F589- 0125- 4A29- A934- 2B564CD2EAE9 ear, llarb
January 9, 2025
Clean Harbors Quote #4716076
WASTE CLASSIFICATIONS SPECIFICATIONS
Waste Code Description
CNO Non Hazardous Solid
Source of PCB < 50 ppm
PRIMARY DISPOSAL METHOD: NON HAZARDOUS LANDFILL
No Free Liquid
Non -hazardous
Biodegrade - able absorbents will be stabilized prior to land No PCB
pH - 2. 1 to 12. 4
PRIMARY DISPOSAL METHOD: NON HAZARDOUS LANDFARM
CNOS Non Hazardous Semi - Solids
Must be able to be landfilled
No herbicides, pesticides, or cyanides
Source of PCB < 50 ppm
Flash point over 140° F
PRIMARY DISPOSAL METHOD: NON HAZARDOUS LANDFILL
Non - hazardous
Must be biodegradable
No PCB
pH - 2. 1 to 12. 4
PRIMARY DISPOSAL METHOD: NON HAZARDOUS LANDFARM
GENERAL CONDITIONS
Except where superseded by an existing services agreement the following terms and conditions apply to this quoted business.
The customer hereby acknowledges that the estimated cost is based upon a preliminary appraisal by a Clean Harbors Representative, and that the amount invoiced by Clean Harbors will be based upon labor and materials actually expended in performing the scope of work. Any changes in the scope will be billed on a time and materials basis.
Clean Harbors guarantees to hold these prices firm for 30 days.
Terms: Net 15 Days
For work to begin we ask that you acknowledge the quotation with a signature and provide the appropriate purchase order number. Where modifications to the scope of services become necessary, Clean Harbors will notify the customer promptly and obtain customer authorization for such modifications and a revised contract price will be established in order to finish the project.
People and Technology Creating a Safer, Cleaner Environment" 99 Docusign Envelope ID: D160F589- 0125- 4A29- A934- 285f34CD2EAE9 Clealt. sarbire
January 9, 2025
Clean Harbors Quote # 4716076
GENERAL CONDITIONS
This proposal is contingent on the customer providing full and complete access to the site.
Customer represents and warrants to Clean Harbors that the customer has the legal right, title and interest necessary to provide access to the site. In addition, customer warrants that it has supplied Clean Harbors complete and accurate information regarding the site, subsurface conditions, utility locations, site ownership, hazardous materials or wastes and other substances or hazards likely to be present and any other reports, documentation or information concerning the scope ofwork.
Interest will be charged at 1.5% per month or the maximum allowed by law for all past due amounts.
Disposal will be managed within the Clean Harbors Network ofApproved Facilities.
Local, state and federal fees/ taxes applying to the generating location/ receiving facilities are not included in disposal pricing and will be added to each invoice as applicable.
Materials subject to additional charges ifthey do not conform to the listed specifications.
A Profile Approval Fee of $125 and Profile Recertification fee of $35 for recertification will be charged upon profile approval or recertification.
Clean Harbors supports many invoice delivery options (E- mail, Electronic Invoicing, EDI, Etc.).
Pricing is based on Clean Harbors' standard invoice delivery method ofE- mail. If another delivery method is required there could be an additional service fee per invoice. Any alternate delivery methods must be reviewed and approved by Clean Harbors prior to acceptance and implementation.
A variable Recovery Fee ( that fluctuates with the DOE national average diesel price), currently at
16. 0%, will be applied to the total invoice. For more information regarding our recovery fee calculation please go to: www. cleanharbors. com/ontact- us/ customer- resources.
Pickups that require same day or next day service may be subject to additional charges.
Pickups cancelled within 72 hours of scheduling will be subject to cancellation charges.
Transportation charges to the final disposal facility will be charged in addition to local transportation to our truck to truck hub/ local facility and will vary with logistics and routing.
Time over eight ( 8) hours in the normal workday and all day Saturday is considered overtime and will be billed at 1. 5 times the applicable straight time rate for all billable personnel unless otherwise quoted. Sunday and Holidays are considered premium time and will be billed at 2. 0 times the applicable straight time rate for all billable personnel unless otherwise quoted.
This proposal is submitted contingent upon the right to negotiate mutually acceptable contract terms and conditions, which are reflective of the work contemplated, and an equitable distribution of the risks involved therein. In the event that such agreement cannot be reached, Clean Harbors reserves the right to decline to enter into such an agreement without prejudice or penalty.
In the event that legal or other action is required to collect unpaid invoice balances, Customer agrees to pay all costs of collection, including reasonable attorneys' fees, and agrees to the jurisdiction of the Commonwealth of Massachusetts.
E -Manifests: EPA Requires electronic filing and reporting of manifest. To cover the cost of the E - Manifest and administrative cost of entering manifest into the system and managing the data, Clean Harbors will charge $ 27 per manifest on every invoice.
People and Technology Creating a Safer, Cleaner Environment" 100
Docusign Envelope ID: D160F589- 0125- 4A29- A934- 2B564CD2EAE9 lemilLsla,,,, rbe.
January 9, 2025
Clean Harbors Quote #4716076
GENERAL CONDITIONS
CARRAA: The additional excise and sales tax added to the price of diesel fuel at the pump under the California Road Repair and Accountability Act ( CARRAA) of 2017 has increased the cost of providing waste management services in the State of California. To off -set this extra cost, Clean Harbors is implementing a 2. 50% CARRAA Fee on every invoice for a California generator.
Unless specifically noted, these rates are not valid where Prevailing Wages and / or certified payroll apply. Any Prevailing Wage rates will be quoted on a case -by -case basis.
Customer will be responsible for providing water on site. If not provided, additional charges will apply.
ACKNOWLEDGEMENT
Your signature below indicates your acceptance of the pricing and terms detailed m the quote above.
Thank you for the opportunity to be of service.
Signature
Print Name
Quote # 4716076
PO# Date
People and Technology Creating a Safer, Cleaner Environment" 101
ATTACHMENT C
City of
Office ofthe City Manager
July , 2025
390 Towne Centre Drive, Lathrop, CA 95330
Phone ( 209) 941- 7220 — Fax (209) 941- 7229
www. ci. lathrop. ca. us
NOTICE TO PROCEED
MP Environmental Services, Inc.
Gina Blankenship, Facility Manager
3400 Manor Street
Bakersfield, CA 93308
Re: Emergency Service Contract for Emergency Removal and Disposal of Hazardous Waste from the Backwash Tank at the Lathrop Water Treatment Facility ( LAWTF) Dear Gina Blankenship:
Enclosed please find your original executed Emergency Service Contract to perform the Emergency Removal and Disposal of Hazardous Waste from the Backwash Tank at the Lathrop Water Treatment Facility ( LAWTF). This is your Notice to Proceed to the attached Emergency Service Contract.
Should you have any questions regarding this project, please contact Michael King, the staff member directly involved with this project, at (209) 941- 7454.
Thank you,
Stephen J. Salvatore
City Manager
Copy: Teresa Vargas, City Clerk
Project File
102
Docusign Envelope ID: 92527418- 8E38- 4B4C- BC8D- CE3B792C3148
EMERGENCY SERVICE CONTRACT BETWEEN
THE CITY OF LATHROP AND MP ENVIRONMENTAL SERVICES, INC.
TO PROVIDE EMERGENCY REMOVAL OF HAZARDOUS WASTE FROM THE BACKWASH
TANK AT THE LATHROP WATER TREATMENT FACILITY (LAWTF)
THIS SERVICE CONTRACT ( hereinafter " Contract") is made on July Vs , 2025, by and between the City of Lathrop, a municipal corporation of the State of California ( hereinafter City") and MP Environmental Services, Inc. ( hereinafter " Contractor"), whose Taxpayer Identification Number is 77- 0262888.
For and in consideration of the following covenants, terms and conditions, City and Contractor (the parties) agree:
SCOPE OF WORK
Contractor agrees to perform the Emergency Removal and Disposal of Hazardous Waste from the Backwash Tank at the LAWTF in accordance with the scope of work and fee proposal provided by the Contractor, attached hereto as Exhibits "A" and " B", and incorporated herein by reference. Contractor agrees to diligently perform these services in accordance with the upmost standards of its profession and to City' ssatisfaction.
The work is being performed as emergency work as defined in Lathrop Municipal Code LMC) 2. 32. 020. The City did not have adequate time to follow the public bid process. Pursuant to LMC 2. 36. 080, purchasing procedures may be eliminated in emergency situations to efficiently and timely maintain essential public services and to preserve property. Contractor agrees to complete the work to the satisfaction of City and subject to inspection, or its representatives.
CONTRACT PRICE
The City agrees to pay and the Contractor agrees to accept, in full payment for the work above agreed to be done based on a time and materials basis not to exceed $ 115, 996. 00 55, 296. 00for the removal of the hazardous waste, attached hereto as Exhibit " A", and a not to exceed amount of $ 60, 700. 0, for the disposal cost of up to 20 bins per ton of hazardous waste at $ 3, 035.0 per bin, attached hereto as Exhibit " B"). In no event shall CONTRACTOR be entitled to compensation for work not included in Exhibits " A" and " B", unless a written change order or authorization describing the extra work and payment terms has been executed by CITY' s City Manager prior to the commencement of the work.
TIME FOR PERFORMANCE
The effective date of this contract is July JL, 2025, and the work shall be started within 10 working days of the issuance of the Notice to Proceed. The work shall be completed within 95 total calendar days of work commencement.
PERMITS; COMPLIANCE WITH LAW
The Contractor shall, at its expense, obtain all necessary permits, licenses, easements, etc., for the construction of the project, give necessary notices, pay all fees required by law, and comply with all laws, ordinances, rules and regulations relating to the work and to the preservation of the public health and safety.
103
Docusign Envelope ID: 92527418- 8E38- 4B4C- BC8D- CE3B792C3148 CITY OF LATHROP - MP ENVIRONMENTAL SERVICES, INC.
EMERGENCY REMOVAL AND DISPOSAL OF HAZARDOUS WASTE FROM THE BACKWASH TANK
AT THE LATHROP WATER TREATMENT FACILITY ( LAWTF)
INSPECTION BY CITY
The Contractor shall at all times maintain proper facilities and provide safe access for inspection by the City to all parts of the work, and to the shops wherein the work is in preparation.
Where the Specifications require work to be specially tested or approved, it shall not be tested or covered up without timely, written approval by the City.
Should any such work be covered up without such notice, approval, or consent, it must, if required by City, be uncovered for examination at the Contractor' s expense.
NOTICE
Any notice from one party to the other under the Contract shall be in writing and shall be dated and signed by the party giving such notice or by a duly authorized representative of such party. Any such notice shall not be effective for any purpose whatsoever unless served in the following manner.
a) If the notice is given to the City, by personal delivery thereof to the City' s Director
of Public Works, or by depositing the same in the United States mail, enclosed in a sealed envelope, addressed to the City' s Director of Public Works, postage prepaid and certified;
b) If the notice is given to the Contractor, by personal delivery thereof to said Contractor or to its duly authorized representative at the site of the project, or by depositing the same in the United States mail, enclosed in a sealed envelope, addressed to the Contractor at the address set forth in the Contractor' sBid postage prepaid and certified; or
c) If the notice is given to the surety or any other person, by personal delivery to such surety or other person, or by depositing the same in the United States mail, enclosed in a sealed envelope, addressed to such surety or other person, as the case may be, at the address of such surety or person last communicated by it to the party giving the notice, postage prepaid and certified.
ACCIDENT PREVENTION
Precaution shall be exercised at all times for the protection of persons ( including employees) and property.
The safety provisions of applicable laws, building and construction codes shall be observed. Machinery, equipment, and other hazards shall be guarded or eliminated in accordance with the safety provisions of the Construction Safety Orders issued by the Occupational Safety and Health Standards Board of the State of California.
CONTRACTOR' SWARRANTY
The City shall not, in any way or manner, be answerable or suffer loss, damage, expense or liability for any loss or damage that may happen to said building, work, or equipment or any part thereof, or in, on, or about the same during its construction and before acceptance.
Contractor unqualifiedly warrants all work and materials to be free of defects whether performed
104
Docusign Envelope ID: 92527416- 8E38- 464C- BC8D- CE3B792C3148 CITY OF LATHROP - MP ENVIRONMENTAL SERVICES, INC.
EMERGENCY REMOVAL AND DISPOSAL OF HAZARDOUS WASTE FROM THE BACKWASH TANK
AT THE LATHROP WATER TREATMENT FACILITY ( LAWTF)
or installed by it or by any subcontractor or supplier in the project which is the subject of this Contract.
APPRENTICES
d) The Contractor' s attention is directed to the provisions of Sections 1777. 5, 1777. 6, and 1777. 7of the California Labor Code concerning employment of apprentices by the Contractor or any subcontractor under him. In addition, Contractor shall obtain a certificate of apprenticeship before employing any apprentice pursuant to Sections 1777. 5, 1777. 6 and 1777. 7of the California Labor Code. e) information relative to apprenticeship standards, wage schedules, and other requirements may be obtained from the Director of Industrial Relations, ex officio the Administrator of Apprenticeship, San Francisco, California, or from the Division of Apprenticeship Standards and its branch offices.
f) Knowing violations of Section 1777. 5 will result in forfeiture not to exceed one hundred dollars ($ 100) for each calendar day of non- compliance pursuant to Section 1777. 7.
HOURS OF WORK
Eight ( 8) hours of work in any calendar day shall constitute a legal day' s
work. The
Contractor and each subcontractor shall forfeit, as penalty to the City, twenty- fivedollars ($25) for each worker employed in the execution of work on the Project by the Contractor or any subcontractor under him for each calendar day during which such worker is required or permitted to work more than eight ( 8) hours in any one calendar day and forty ( 40) hours in any calendar week in violation of the provisions of the Labor Code, and in particular, Section 1810 to Section 1815, thereof, inclusive, except that work performed by employees of the Contractor and his subcontractors in excess of eight hours per day at not less than one and one half times the basic rate of pay, as provided in Labor Code section 1815.
PAYROLL RECORDS
Pursuant to Labor Code section 1776, as amended from time to time, the Contractor and each subcontractor shall keep records showing the name, address, social security number, work classification, straight time and overtime hours paid each day and week, and the actual per diem wages paid to each journeyman, apprentice, worker or other employee employed by him or her in connection with the work.
The certified payroll records shall be on forms provided by the Division of Labor Standards Enforcement or shall contain the same information as the forms provided by the Division.
The payroll records shall be certified and shall be available for inspection at all reasonable hours at the principal office of the Contractor on the following basis:
g) A certified copy of the employee' spayroll records shall be made available for inspection or furnished to such employee or his or her authorized representative on request.
105
Docusign Envelope ID: 92527418- 8E38- 4B4C- BC8D- CE3B792C3148 CITY OF LATHROP - MP ENVIRONMENTAL SERVICES, INC.
EMERGENCY REMOVAL AND DISPOSAL OF HAZARDOUS WASTE FROM THE BACKWASH TANK
AT THE LATHROP WATER TREATMENT FACILITY ( LAWTF)
h) A certified copy of all payroll records shall be made available for inspection or furnished upon request, or as required by Labor Code section 1771. 7to the City, the Division of Labor Standards Enforcement and the Division of Apprenticeship Standards of the Department of Industrial Relations.
i) A certified copy of all payroll records shall be made available upon request to the public for inspection or copies thereof made; provided, however, that if request by the public shall be made through either the City, the Division of Apprenticeship Standards, or the Division of Labor Standards Enforcement, if as requested, payroll records have been provided pursuant to paragraph ( b), the requesting party shall, prior to being provided the records, reimburse the cost of preparation by the Contractor, subcontractors and the entity through which the request was made.
The public shall not be given access to such records at the principal office of the Contractor.
The Contractor shall file a certified copy of the payroll records with the entity that requested such records within ten ( 10) calendar days after receipt of a written request.
Any copy of records made available for inspection as copies and furnished upon request to the public or the City, the Division of Apprenticeship Standards, or the Division of Labor Standards Enforcement, shall be marked or obliterated in such a manner as to prevent disclosure of an individual' s name, address, and social security number. The name and address of the Contractor or any subcontractor performing work on the Project shall not be marked or obliterated.
The Contractor shall inform the City of the location of the payroll records, including the street address, city and county, and shall, within five ( 5) calendar days, provide a notice of a change of location and address.
In the event of noncompliance with the requirements of this section, the Contractor shall have ten ( 10) calendar days in which to comply subsequent to receipt of written notice specifying in what respects the Contractor must comply with this section. Should noncompliance still be evident after such ten ( 10) calendar day period, the Contractor shall, as a penalty to the City, forfeit twenty- five dollars ($ 25) for each calendar day, or portion thereof, for each worker until strict compliance is effectuated.
Upon the request of the Division of Labor Standards Enforcement, such penalties shall be withheld from payments due Contractor.
PREVAILING WAGES
j) The Contractor is aware of the requirements of California Labor Code Sections 1720 et seq. and 1770 et seq., as well as California Code of Regulations, Title 8, section 16000 et seq. ("Prevailing Wage Laws") which require the payment of prevailing wage rates and the performance of other requirements on certain " public works" and " maintenance" projects. Since this Contract involves an applicable public works" or " maintenance" project, as defined by the Prevailing Wage Laws, and since the total compensation is $ 1, 000 or more, Contractor agrees to fully comply with such Prevailing Wage Laws. The Contractor shall obtain a copy of
the prevailing rates of per diem wages applicable to the work to be performed by subcontractors from the website of the Division of Labor Statistics and Research
106
Docusign Envelope ID: 92527418- 8E38- 4B4C- BC8D- CE3B792C3148 CITY OF LATHROP - MP ENVIRONMENTAL SERVICES, INC.
EMERGENCY REMOVAL AND DISPOSAL OF HAZARDOUS WASTE FROM THE BACKWASH TANK
AT THE LATHROP WATER TREATMENT FACILITY (LAWTF)
of the Department of Industrial Relations located at
http:// www. dir. ca. gov/ dlsr/ PWD/ index. htm. In the alternative, the City shall provide Contractor with a copy of the prevailing rates of per diem wages applicable to the work to be performed by subcontractors.
Contractor shall make copies of the prevailing rates of per diem wages for each craft, classification or type of worker needed to perform work on the Project available to interested parties upon request, and shall post copies at the Contractor' sprincipal place of business and at the Project site.
Contractor shall defend, indemnify and hold the City, its elected officials, officers, employees and agents free and harmless from any claims, liabilities, costs, penalties or interest arising out of any failure or allege failure to comply with the Prevailing Wage Laws.
k) The Contractor and each subcontractor shall forfeit as a penalty to the City not more than fifty dollars ($ 50) for each calendar day, or portion thereof, for each worker paid less than the stipulated prevailing rate for any work done by him, or by any subcontract under him, in violation of the provisions of the California Labor Code. The difference between such stipulated prevailing wage rate and the amount paid to each worker for each calendar day or portion thereof for which each worker was paid less than the stipulated prevailing wage rate shall be paid to each worker by the Contractor.
INSURANCE
On or before beginning any of the services or work called for by any term of this Agreement, CONTRACTOR, at its own cost and expense, shall carry, maintain for the duration of the Agreement, and provide proof thereof that is acceptable to the CITY the insurance specified in subsections (a) through (c) below with insurers and under forms of insurance satisfactory in all respects to the CITY. CONTRACTOR shall not allow any subcontractor to commence work on any subcontract until all insurance required of the CONTRACTOR has also been obtained for the subcontractor. Verification of this insurance shall be submitted and made part of this Agreement prior to execution.
a) Workers' Compensation. CONTRACTOR shall, at CONTRACTOR' Ssole cost and expense, maintain Statutory Workers' Compensation Insurance and Employer' s Liability Insurance for any and all persons employed directly or indirectly by CONTRACTOR. Said Statutory Workers' Compensation Insurance and Employer' s Liability Insurance shall be provided with limits of not less than one million dollars ($ 1, 000,0). In the alternative, CONTRACTOR may rely on a self- insurance program to meet these requirements provided that the program of self- insurance complies fully with the provisions of the California Labor Code. The insurer, if insurance is provided, or the CONTRACTOR, if a program of self- insurance is provided, shall waive all rights of subrogation against the CITY for loss arising from work performed under this Agreement.
b) Commercial General and Automobile Liability Insurance. CONTRACTOR, at CONTRACTOR' Sown cost and expense, shall maintain commercial
107
Docusign Envelope ID: 9252741B- 8E38- 4B4C- BC8D- CE3B792C3148 CITY OF LATHROP - MP ENVIRONMENTAL SERVICES, INC.
EMERGENCY REMOVAL AND DISPOSAL OF HAZARDOUS WASTE FROM THE BACKWASH TANK
AT THE LATHROP WATER TREATMENT FACILITY ( LAWTF)
general and automobile liability insurance for the period covered by this Agreement in an amount not less than one million dollars per occurrence 1, 000,0), combined single limit coverage for risks associated with the work contemplated by this Agreement.
If Commercial General Liability Insurance or an Automobile Liability form or other form with a general aggregate limit is used, either the general aggregate limit shall apply separately to the work to be performed under this Agreement or the general aggregate limit shall be at least twice the required occurrence limit. Such coverage shall include but shall not be limited to, protection against claims arising from bodily and personal injury, including death resulting therefrom, and damage to property resulting from activities contemplated under this Agreement, including the use of owned and non -owned automobiles.
Coverage shall be at least as broad as Insurance Services Office Commercial General Liability occurrence form CG 0001 ( ed. 11/ 88) and Insurance Services Office Automobile Liability form CA 0001 ( ed. 12/ 90) Code 1 ( any auto).
Each of the following shall be included in the insurance coverage or added as an endorsement to the policy:
i) CITY, its officers, employees, and volunteers are to be covered as insured with respect to each of the following: liability arising out of activities performed by or on behalf of CONTRACTOR, products and completed operations of CONTRACTOR; premises owned, occupied or used by CONTRACTOR. The coverage shall contain no special limitations on the scope of protection afforded to CITY, its officers, employees, agents, or volunteers.
ii) The insurance shall cover on an occurrence or an accident basis, and not on a claim made basis.
iii) An endorsement must state that coverage is primary insurance and that no other insurance affected by the CITY will be called upon to contribute to a loss under the coverage.
iv) Any failure of CONTRACTOR to comply with reporting provisions of the policy shall not affect coverage provided to CITY and its officers, employees, agents, and volunteers.
v) Insurance is to be placed with California - admitted insurers with a Best' srating of no less than A: VII.
vi) Notice of cancellation or non - renewal must be received by CITY at least thirty days prior to such change.
c) Deductibles and Self -Insured Retentions. CONTRACTOR shall disclose the self -insured retentions and deductibles before beginning any of the
108
Docusign Envelope ID: 9252741B- 8E38- 4B4C- BC8D- CE3B792C3148 CITY OF LATHROP - MP ENVIRONMENTAL SERVICES, INC.
EMERGENCY REMOVAL AND DISPOSAL OF HAZARDOUS WASTE FROM THE BACKWASH TANK
AT THE LATHROP WATER TREATMENT FACILITY ( LAWTF)
services or work called for by any term of this Agreement. During the period covered by this Agreement, upon express written authorization of CITY Manager, CONTRACTOR may increase such deductibles or self -insured retentions with respect to CITY, its officers, employees, agents, and volunteers.
The CITY Manager may condition approval of an increase in deductible or self -insured retention levels upon a
requirement that CONTRACTOR
procure a bond guaranteeing payment of losses and related investigations, claim administration, and defense expenses that is satisfactory in all respects to each of them.
d) Notice of Reduction in Coverage. In the event that any coverage required under subsections ( a), (b), or ( c) of this section of the Agreement is reduced, limited, or materially affected in any other manner, earliest
CONTRACTOR
possible
shall
opportunity
provide
and
written
in
notice
no case
to CITY
later than
at CONTRACTOR' S
five days after
CONTRACTOR is notified of the change in coverage.
e) In addition to any other remedies CITY may have if CONTRACTOR fails to provide or maintain any insurance policies or policy endorsements to the extent and within the time herein required, CITY may, at its sole option:
i) Obtain such insurance and deduct and retain the amount of the premiums for such insurance from any sums due under the Agreement;
ii) Order CONTRACTOR to stop work under this Agreement or withhold any payment which becomes due to CONTRACTOR
hereunder, or both stop work and withhold any payment, until CONTRACTOR demonstrates compliance with the requirements hereof;
iii) Terminate this Agreement.
Exercise of any of the above remedies, however, is an alternative to other remedies CITY may have and is not the exclusive remedy for CONTRACTOR' Sbreach.
INDEMNIFICATION
Contractor agrees to protect, defend, indemnify and hold City, its City Council members, officers, employees, engineer, and consultants harmless from and against any and all claims, demands, liabilities, losses, damages, costs, expenses, liens, penalties, suits, or judgments, arising in whole or in part, directly or indirectly, at any time from any injury to or death of persons or damage to property as a result of the willful or negligent act or omission of Contractor, or which results from Contractor' snoncompliance with any Law respecting the condition, use, occupation or safety of the Project site, or any part thereof, or which arises from Contractor' sfailure to do anything required under this Contract or for doing anything which Contractor is required not to do under this Contract, or which arises from conduct for which any Law imposes strict liability on Contractor in the performance of or failure to perform the terms and conditions of this Contract,
109
Docusign Envelope ID: 9252741B- 8E38- 4B4C- BC8D- CE3B792C3148 CITY OF LATHROP - MP ENVIRONMENTAL SERVICES, INC.
EMERGENCY REMOVAL AND DISPOSAL OF HAZARDOUS WASTE FROM THE BACKWASH TANK
AT THE LATHROP WATER TREATMENT FACILITY ( LAWTF)
except as may arise from the sole willful or negligent act or omission of City or any of its City Council members, officers, employees.
This indemnification shall extend to any and all claims, demands, or liens made or filed by reason of any construction, renovation, or remodeling work performed by Contractor under this Contract at any time during the term of this Contract, or arising thereafter.
SEVERABILITY
Nothing contained in the Contract shall be construed so as to require the commission of any act contrary to law. Should a conflict arise between any provision contained herein and any present or future statute, law, ordinance or regulation contrary to which the parties have no legal right to contract or act, the latter shall prevail and the provision of this Contract which is affected shall be curtailed and limited but only to the extent necessary to bring it within the requirements of the law. If such curtailment or limitation is not possible, the affected provision shall be of no force and effect. Except as aforesaid, such illegality shall not affect the validity of this Contract.
COMPLETE AGREEMENT
This Contract supersedes any and all agreements, either oral or in writing, between the Parties with respect to the subject matter herein.
Each party to this Contract acknowledges that no representation by any party which is not embodied herein or any other agreement, statement, or promise not contained in this Contract shall be valid and binding.
INTERPRETATION
I)
m)
The parties hereto acknowledge and agree that each has been given the opportunity to independently review this Contract with legal counsel, and/ or has the requisite experience and sophistication to understand, interpret and agree to the particular language of the provisions of the Contract.
In the event of a controversy or dispute between the parties concerning the provisions herein, this document shall be interpreted according to the provisions herein and no presumption shall arise concerning the draftsmanship of such provision.
APPLICABLE LAW
n) The parties hereto understand and agree that the terms of this Contract, and its Exhibits, have been negotiated and executed within the State of California and shall be governed by and construed under the laws of the State of California. o) In the event of a dispute concerning the terms of this Contract, the parties hereto expressly agree that the venue for any legal action shall be with the appropriate court in the County of San Joaquin, State of California.
110
Docusign Envelope ID: 9252741 B- 8E38- 4B4C- BC8D- CE3B792C3148 CITY OF LATHROP - MP ENVIRONMENTAL SERVICES, INC.
EMERGENCY REMOVAL AND DISPOSAL OF HAZARDOUS WASTE FROM THE BACKWASH TANK
AT THE LATHROP WATER TREATMENT FACILITY ( LAWTF)
SIGNATURES
The individuals executing this Agreement represent and warrant that they have the right, power, legal capacity, and authority to enter into and to execute this Agreement on behalf of the respective legal entities of the CONSULTANT and the CITY. This agreement shall inure to the benefit of and be binding upon the parties hereto and their respective successors and assigns.
111
Docusign Envelope ID: 92527416- 8E38- 4B4C- BC8D- CE3B792C3148 CITY OF LATHROP - MP ENVIRONMENTAL SERVICES, INC.
EMERGENCY REMOVAL AND DISPOSAL OF HAZARDOUS WASTE FROM THE BACKWASH TANK
AT THE LATHROP WATER TREATMENT FACILITY ( LAWTF)
Approved as to Form:
Recommended for Approval:
Approved by:
Contractor:
City of Lathrop
City Attorney
Z-- 2EJZ`
Salvador Navarrete Date
City of Lathrop
Assistant City Manager
7.2• zozs
Michael King Date
City of Lathrop
390 Towne Centre Drive
Lathrop, CA 95330
Stephen J. Salvatore Date
City Manager
MP Environmental Services, Inc.
Gina Blankenship, Facility Manager
3400 Manor Street
Bakersfield, CA 93308
661) 393- 0205
Fed ID # 77- 0262888
Lathrop Business License # NLB- 001721- 205
Docu8lgned by:
Raktt, esAourD4ur. or...
Signature Date
Gina Blankenship
7/ 1/ 2025
Facility Manager
Print Name and Title
DocuSlgned by:
ZittlArt. 1ILn4J. r 7/ 1/ 2025
Signature
Richard Turner Controller
Date
Print Name and Title
112
81111101111WILIIIIK" 114
Docusign Envelope ID: 92527418- 8E38- 4B4C- BC8D- CE3B792C3148 MP Environmental Services, Inc.
Since 1944
Customer City of Lathrop
Project Tank Cleaning
EXHIBIT A
EC 250505
Cost Estimate
Proposal Date 06/ 26/025
Prepared By Bret Bennett
PERSONNEL
Item
Project Manager - ST
Technician - ST
Project Manager OT
Technician - OT
Operator - ST
Operator - OT
PPE - Level C
Per -Diem
QTY UOM QTY Rate
1 HR 8 $ 90. 00
3 HR 8 $ 98. 00
1 HR 2 $ 120. 00
3 HR 2 $ 125. 50
1 HR 8 $ 129. 75
1 HR 2 $ 170. 50
3 EA / DAY 1 $ 140. 00
5 EA / DAY 1 $ 250. 00
Total
720. 00
2, 352. 00
240. 00
753. 00
1, 038.0
341. 00
420. 00
1, 250. 0
Personnel Daily Subtotal 7, 114. 00
EQUIPMENT
Item
Support Pickup ( Unoperated)
One Ton Truck ( Unoperated)
GAP -VAX HV 44 Series or Equivalent
Full Confined Space Safety Package
Project Trailer
Supervac Ramps
QTY UOM QTY Rate
1 DAY 1 $ 165. 00
1 DAY 1 $ 225. 00
1 HR 10 $ 205. 00
1 DAY 1 $ 500. 00
1 DAY 1 $ 275. 00
1 DAY 1 $ 150. 00
Total
165. 00
225. 00
2, 050.
500. 00
275. 00
150. 00
Equipment Daily Subtotal 3,65. 00
Personnel & Equipment Daily Cost 10, 479. 00
Estimated Number of Days 4
Personnel & Equipment Total 41, 916. 00
JOB SUPPLIES / OTHER
Item
6 Inch Flex Hose
Bin Liner - Filter Cloth - 130 micron
UOM
FT
EA
QTY Rate
200 $ 6. 75 $
8 $ 135. 00 $
Total
1, 350. 0
1, 080.
Job Supplies / Other Subtotal 2, 430. 0
MOBILIZATION / DEMOBILIZATION
Item
Mobilization / Demobilization
UOM
DAY
QTY Rate
2 $ 5, 475. 00 $
Total
10, 950. 0
Mob / Demob Subtotal 10, 950. 0
113
Docusign Envelope ID: 92527418- 8E38- 4B4C- BC8D- CE3B792C3148 sesvuesamesserop, tea
TOTAL ESTIMATED PROJECT COST 55, 296. 00
MP Environmental Services, Inc,
Since 1944
Proposal Assumptions & Conditions
This is a budgetary estimate only.
Estimate is valid for sixty (60) days from date above.
Work performed Monday through Friday. Additional costs for weekends/ holidays.
Four hour minimum applicable to all service calls.
All rates are portal to portal from facility which dispatches equipment unless otherwise specified.
Any disposal and/ or laboratory analysis will be billed at cost plus 20% All work completed out of original work scope will be billed to customer at time and material rate.
Change order rates will be provided upon customer request.
All Equipment must be decontaminated after project. If performed on -site, decontamination will be charged on a time and material basis. If decontamination is conducted at an off -site facility, decontamination will be billed at cost plus 15%.
Only MP Environmental Personnel are authorized to deliver, pickup, operate, or transfer MP Equipment.
Estimates are based on our best information and actual time may vary.
Mobilization price includes 8 dewatering bins for 30 days, if additional days are required additional cost will be incurred. ($ 45. 00 per bin per Estimate does not include transportation or disposale of waste, this will be determined upon waste profile and acceptance.
Print
Signature
By Signing below, you are giving MP Environmental Services, Inc. authorization to proceed with the listed project.
Title
Date
MP Environmental would like to thank you for the opportunity to assist your company with our services and looks forward to providing you with the highest quality of service and safety! MP Environmental Services, Inc.
114
Docusign Envelope ID: 9252741B- 8E38- 4B4C- BC8D- CE3B792C3148 3400 Manor St. Bakersfield, CA 93308
Office (661) 393- 1151
115
mrewoompercusumamiNc
Docusign Envelope ID: 9252741B- 8E38- 4B4C- BC8D- CE3B792C3148 MP Environmental Services, Inc.
Since 1944
Customer: CITY OF LAHROP
Billing Address:
EXHIBIT B
Cost Estimate
Office (661) 393- 1151
www. mpenviro. com
Quoted By: Bret Bennett
Direct: ( 661) 302. 8168
Email:
Date:
bbennett@mpenviro. com
MONDAY 6- 16- 25
QTY DESCRIPTION UOM QTY RATE ITEM TOTAL
0:
O
b
Q
i
LABOR SUB TOTAL
QTY DESCRIPTION UOM QTY RATE ITEM TOTAL
ti
W
Q.
W
U
u)
tL
1 Roll -off Truck ( Operated)
1 Fuel Surcharge June - 2025
i
HOUR 8 $ 125. 00
DAY 1 32%
FSC EQUIPMENT SUB TOTAL
1, 000.
320. 00
1, 320. 0
QTY DESCRIPTION UOM QTY RATE ITEM TOTAL
I2
W
0 CY
W
U
U2
O
1 Dewatering Bin EA / DAY 1 $ 45. 00
NON FSC EQUIPMENT SUB TOTAL
45. 00
45. 00
DESCRIPTION UOM QTY RATE ITEM TOTAL
1 Or
O
HAZ/ NON HAZ MANIFEST
Bin Liner - Filter Cloth - 130 micron
DISPOSAL
ONE TIME PROFILING FEE
I
EACH 1 $ 25. 00
EACH 1 $ 145. 00
TON 10 $ 115. 00
EACH 1 $ 350. 00
OTHER SUB TOTAL
25. 00
145. 00
1,50. 0
350. 00
1, 670. 0
DESCRIPTION OF SERVICES ESTIMATED NUMBER OF DAYS 1
DISPOSAL PRICE PER BIN PER TON TO KETTLEMAN CITY AND BACK TO
CITY OF LATHROP
LABOR & EQUIPMENT TOTAL $ 1, 365. 00
OTHER TOTAL $ 1, 670. 0
ESTIMATED PROJECT TOTAL $ 3, 035.0
116
ATTACHMENT D
Docusign Envelope ID: 7A2B03A8- B466- 4B3E- 9135- FDFDOFCECF7D
EMERGENCY SERVICE CONTRACT BETWEEN
THE CITY OF LATHROP AND MP ENVIRONMENTAL SERVICES, INC.
TO PROVIDE EMERGENCY REMOVAL AND DISPOSAL OF ADDITIONAL HAZARDOUS
WASTE FROM THE BACKWASH TANK AT THE LATHROP WATER TREATMENT
FACILITY ( LAWTF)
THIS SERVICE CONTRACT ( hereinafter "Contract") is made on August V9 , 2025, by and between the City of Lathrop, a municipal corporation of the State of California ( hereinafter City") and MP Environmental Services, Inc. (hereinafter " Contractor"), whose Taxpayer Identification Number is 77- 0262888.
For and in consideration of the following covenants, terms and conditions, City and Contractor (the parties) agree:
SCOPE OF WORK
Contractor agrees to perform the Emergency Removal and Disposal of Additional Hazardous Waste from the Backwash Tank at the LAWTF in accordance with the scope of work and fee proposal provided by the Contractor, attached hereto as Exhibit " A", and incorporated herein by reference. Contractor agrees to diligently perform these services in accordance with the upmost standards of its profession and to City' ssatisfaction.
The work is being performed as emergency work as defined in Lathrop Municipal Code LMC) 2. 32. 020. The City did not have adequate time to follow the public bid process. Pursuant to LMC 2. 36. 080, purchasing procedures may be eliminated in emergency situations to efficiently and timely maintain essential public services and to preserve property. Contractor agrees to complete the work to the satisfaction of City and subject to inspection, or its representatives.
CONTRACT PRICE
The City agrees to pay and the Contractor agrees to accept, in full payment for the work above agreed to be done based on a time and materials basis not to exceed $ 91, 283. 00 16,83. 00for the delivery of eighteen roll -off bins, $2,00. 0for sample collection and analysis, and a not to exceed amount of $ 72, 900. 0 for the rental of eighteen dewatering bins for up to 90 days at $ 45. 00 per day, attached hereto as Exhibit " A"). In no event shall CONTRACTOR be entitled to compensation for work not included in Exhibit " A", unless a written change order or authorization describing the extra work and payment terms has been executed by CITY' s City Manager prior to the commencement of the work.
TIME FOR PERFORMANCE
The work began on July 21, 2025. The work shall be completed within 95 total calendar days of work commencement.
PERMITS; COMPLIANCE WITH LAW
The Contractor shall, at its expense, obtain all necessary permits, licenses, easements, etc., for the construction of the project, give necessary notices, pay all fees required by law, and comply with all laws, ordinances, rules and regulations relating to the work and to the preservation of the public health and safety.
117
Docusign Envelope ID: 7A2B03A8- B466- 4B3E- 9135- FDFDOFCECF7D CITY OF LATHROP - MP ENVIRONMENTAL SERVICES, INC.
EMERGENCY REMOVAL AND DISPOSAL OF ADDITIONAL HAZARDOUS WASTE FROM THE
BACKWASH TANK AT THE LATHROP WATER TREATMENT FACILITY ( LAWTF)
INSPECTION BY CITY
The Contractor shall at all times maintain proper facilities and provide safe access for inspection by the City to all parts of the work, and to the shops wherein the work is in preparation.
Where the Specifications require work to be specially tested or approved, it shall not be tested or covered up without timely, written approval by the City.
Should any such work be covered up without such notice, approval, or consent, it must, if required by City, be uncovered for examination at the Contractor' sexpense.
NOTICE
Any notice from one party to the other under the Contract shall be in writing and shall be dated and signed by the party giving such notice or by a duly authorized representative of such party. Any such notice shall not be effective for any purpose whatsoever unless served in the following manner.
a) If the notice is given to the City, by personal delivery thereof to the City' s Director
of Public Works, or by depositing the same in the United States mail, enclosed in a sealed envelope, addressed to the City' s
Director of Public Works, postage
prepaid and certified;
b) If the notice is given to the Contractor, by personal delivery thereof to said Contractor or to its duly authorized representative at the site of the project, or by depositing the same in the United States mail, enclosed in a sealed envelope, addressed to the Contractor at the address set forth in the Contractor' sBid postage prepaid and certified; or
c) If the notice is given to the surety or any other person, by personal delivery to such surety or other person, or by depositing the same in the United States mail, enclosed in a sealed envelope, addressed to such surety or other person, as the case may be, at the address of such surety or person last communicated by it to the party giving the notice, postage prepaid and certified.
ACCIDENT PREVENTION
Precaution shall be exercised at all times for the protection of persons ( including employees) and property.
The safety provisions of applicable laws, building and construction codes shall be observed. Machinery, equipment, and other hazards shall be guarded or eliminated in accordance with the safety provisions of the Construction Safety Orders issued by the Occupational Safety and Health Standards Board of the State of California.
CONTRACTOR' S WARRANTY
The City shall not, in any way or manner, be answerable or suffer loss, damage, expense or liability for any loss or damage that may happen to said building, work, or equipment or any part thereof, or in, on, or about the same during its construction and before acceptance.
Contractor unqualifiedly warrants all work and materials to be free of defects whether performed
118
Docusign Envelope ID: 7A2B03A8- B466- 4B3E- 9135- FDFDOFCECF7D CITY OF LATHROP - MP ENVIRONMENTAL SERVICES, INC.
EMERGENCY REMOVAL AND DISPOSAL OF ADDITIONAL HAZARDOUS WASTE FROM THE
BACKWASH TANK AT THE LATHROP WATER TREATMENT FACILITY (LAWTF) or installed by it or by any subcontractor or supplier in the project which is the subject of this Contract.
APPRENTICES
d) The Contractor' sattention is directed to the provisions of Sections 1777. 5, 1777. 6, and 1777. 7of the California Labor Code concerning employment of apprentices by the Contractor or any subcontractor under him. In addition, Contractor shall obtain a certificate of apprenticeship before employing any apprentice pursuant to Sections 1777. 5, 1777. 6 and 1777. 7 of the California Labor Code. e) Information relative to apprenticeship standards, wage schedules, and other requirements may be obtained from the Director of Industrial Relations, ex officio the Administrator of Apprenticeship, San Francisco, California, or from the Division of Apprenticeship Standards and its branch offices.
f) Knowing violations of Section 1777. 5 will result in forfeiture not to exceed one hundred dollars ($ 100) for each calendar day of non- compliance pursuant to Section 1777. 7.
HOURS OF WORK
Eight ( 8) hours of work in any calendar day shall constitute a legal day' s
work. The
Contractor and each subcontractor shall forfeit, as penalty to the City, twenty- five dollars ($ 25) for each worker employed in the execution of work on the Project by the Contractor or any subcontractor under him for each calendar day during which such worker is required or permitted to work more than eight ( 8) hours in any one calendar day and forty ( 40) hours in any calendar week in violation of the provisions of the Labor Code, and in particular, Section 1810 to Section 1815, thereof, inclusive, except that work performed by employees of the Contractor and his subcontractors in excess of eight hours per day at not less than one and one half times the basic rate of pay, as provided in Labor Code section 1815.
PAYROLL RECORDS
Pursuant to Labor Code section 1776, as amended from time to time, the Contractor and each subcontractor shall keep records showing the name, address, social security number, work classification, straight time and overtime hours paid each day and week, and the actual per diem wages paid to each joumeyman, apprentice, worker or other employee employed by him or her in connection with the work.
The certified payroll records shall be on forms provided by the Division of Labor Standards Enforcement or shall contain the same information as the forms provided by the Division.
The payroll records shall be certified and shall be available for inspection at all reasonable hours at the principal office of the Contractor on the following basis:
g) A certified copy of the employee' spayroll records shall be made available for inspection or furnished to such employee or his or her authorized representative on request.
119
Docusign Envelope ID: 7A2B03A8- B466- 4B3E- 9135- FDFDOFCECF7D CITY OF LATHROP - MP ENVIRONMENTAL SERVICES, INC.
EMERGENCY REMOVAL AND DISPOSAL OF ADDITIONAL HAZARDOUS WASTE FROM THE
BACKWASH TANK AT THE LATHROP WATER TREATMENT FACILITY ( LAWTF) h) A certified copy of all payroll records shall be made available for inspection or furnished upon request, or as required by Labor Code section 1771. 7to the City, the Division of Labor Standards Enforcement and the Division of Apprenticeship Standards of the Department of Industrial Relations.
c> A certified copy of all payroll records shall be made available upon request to the public for inspection or copies thereof made; provided, however, that if request by the public shall be made through either the City, the Division of Apprenticeship Standards, or the Division of Labor Standards Enforcement, if as requested, payroll records have been provided pursuant to paragraph ( b), the requesting party shall, prior to being provided the records, reimburse the cost of preparation by the Contractor, subcontractors and the entity through which the request was made.
The public shall not be given access to such records at the principal office of the Contractor.
The Contractor shall file a certified copy of the payroll records with the entity that requested such records within ten ( 10) calendar days after receipt of a written request.
Any copy of records made available for inspection as copies and furnished upon request to the public or the City, the Division of Apprenticeship Standards, or the Division of Labor Standards Enforcement, shall be marked or obliterated in such a manner as to prevent disclosure of an individual' s name, address, and social security number. The name and address of the Contractor or any subcontractor performing work on the Project shall not be marked or obliterated.
The Contractor shall inform the City of the location of the payroll records, including the street address, city and county, and shall, within five ( 5) calendar days, provide a notice of a change of location and address.
In the event of noncompliance with the requirements of this section, the Contractor shall have ten ( 10) calendar days in which to comply subsequent to receipt of written notice specifying in what respects the Contractor must comply with this section. Should noncompliance still be evident after such ten ( 10) calendar day period, the Contractor shall, as a penalty to the City, forfeit twenty- five dollars ($ 25) for each calendar day, or portion thereof, for each worker until strict compliance is effectuated.
Upon the request of the Division of Labor Standards Enforcement, such penalties shall be withheld from payments due Contractor.
PREVAILING WAGES
j) The Contractor is aware of the requirements of California Labor Code Sections 1720 et seq. and 1770 et seq., as well as California Code of Regulations, Title 8, section 16000 et seq. (" Prevailing Wage Laws") which require the payment of prevailing wage rates and the performance of other requirements on certain " public works" and " maintenance" projects. Since this Contract involves an applicable public works" or "maintenance" project, as defined by the Prevailing Wage Laws, and since the total compensation is $ 1, 000 or more, Contractor agrees to fully comply with such Prevailing Wage Laws. The Contractor shall obtain a copy of the prevailing rates of per diem wages applicable to the work to be performed by subcontractors from the website of the Division of Labor Statistics and Research
120
Docusign Envelope ID: 7A2B03A6- 6466- 4B3E- 9135- FDFDOFCECF7D CITY OF LATHROP - MP ENVIRONMENTAL SERVICES, INC.
EMERGENCY REMOVAL AND DISPOSAL OF ADDITIONAL HAZARDOUS WASTE FROM THE
BACKWASH TANK AT THE LATHROP WATER TREATMENT FACILITY ( LAWTF) of the Department of Industrial Relations located at
http:// www. dir. ca. gov/ dIsr/ PWD/ index. htm. In the alternative, the City shall provide Contractor with a
copy of the prevailing rates of per diem wages applicable to the work to be performed by subcontractors.
Contractor shall make copies of the prevailing rates of per diem wages for each craft, classification or type of worker needed to perform work on the Project available to interested parties upon request, and shall post copies at the Contractor' sprincipal place of business and at the Project site.
Contractor shall defend, indemnify and hold the City, its elected officials, officers, employees and agents free and harmless from any claims, liabilities, costs, penalties or interest arising out of any failure or allege failure to comply with the Prevailing Wage Laws.
k) The Contractor and each subcontractor shall forfeit as a penalty to the City not more than fifty dollars ($ 50) for each calendar day, or portion thereof, for each worker paid less than the stipulated prevailing rate for any work done by him, or by any subcontract under him, in violation of the provisions of the California Labor Code. The difference between such stipulated prevailing wage rate and the amount paid to each worker for each calendar day or portion thereof for which each worker was paid less than the stipulated prevailing wage rate shall be paid to each worker by the Contractor.
INSURANCE
On or before beginning any of the services or work called for by any term of this Agreement, CONTRACTOR, at its own cost and expense, shall carry, maintain for the duration of the Agreement, and provide proof thereof that is acceptable to the CITY the insurance specified in subsections ( a) through ( c) below with insurers and under forms of insurance satisfactory in all respects to the CITY. CONTRACTOR shall not allow any subcontractor to commence work on any subcontract until all insurance required of the CONTRACTOR has also been obtained for the subcontractor. Verification of this insurance shall be submitted and made part of this Agreement prior to execution.
a) Workers' Compensation. CONTRACTOR shall, at CONTRACTOR' Ssole cost and expense, maintain Statutory Workers' Compensation Insurance and Employer' s Liability Insurance for any and all persons employed directly or indirectly by CONTRACTOR. Said Statutory Workers' Compensation Insurance and Employer' s Liability Insurance shall be provided with limits of not less than one million dollars ($ 1, 000,00). In the alternative, CONTRACTOR may rely on a self- insurance program to meet these requirements provided that the program of self- insurance complies fully with the provisions of the California Labor Code. The insurer, if insurance is provided, orthe CONTRACTOR, if a program of self- insurance is provided, shall waive all rights of subrogation against the CITY for loss arising from work performed under this Agreement.
b) Commercial General and Automobile Liability Insurance. CONTRACTOR, at CONTRACTOR' Sown cost and expense, shall maintain commercial
121
Docusign Envelope ID: 7A2B03A8- B466- 4B3E- 9135- FDFDOFCECF7D CITY OF LATHROP - MP ENVIRONMENTAL SERVICES, INC.
EMERGENCY REMOVAL AND DISPOSAL OF ADDITIONAL HAZARDOUS WASTE FROM THE
BACKWASH TANK AT THE LATHROP WATER TREATMENT FACILITY ( LAWTF) general and automobile liability insurance for the period covered by this Agreement in an amount not less than one million dollars per occurrence 1, 000,0), combined single limit coverage for risks associated with the work contemplated by this Agreement.
If Commercial General Liability Insurance or an Automobile Liability form or other form with a general aggregate limit is used, either the general aggregate limit shall apply separately to the work to be performed under this Agreement or the general aggregate limit shall be at least twice the required occurrence limit. Such coverage shall include but shall not be limited to, protection against claims arising from bodily and personal injury, including death resulting therefrom, and damage to property resulting from activities contemplated under this Agreement, including the use of owned and non -owned automobiles.
Coverage shall be at least as broad as Insurance Services Office Commercial General Liability occurrence form CG 0001 ( ed. 11/ 88) and Insurance Services Office Automobile Liability form CA 0001 ( ed. 12/ 90) Code 1 ( any auto).
Each of the following shall be included in the insurance coverage or added as an endorsement to the policy:
i) CITY, its officers, employees, and volunteers are to be covered as insured with respect to each of the following: liability arising out of activities performed by or on behalf of CONTRACTOR, products and completed operations of CONTRACTOR; premises owned, occupied or used by CONTRACTOR. The coverage shall contain no special limitations on the scope of protection afforded to CITY, its officers, employees, agents, or volunteers.
ii) The insurance shall cover on an occurrence or an accident basis, and not on a claim made basis.
iii) An endorsement must state that coverage is primary insurance and that no other insurance affected by the CITY will be called upon to contribute to a loss under the coverage.
iv) Any failure of CONTRACTOR to comply with reporting provisions of the policy shall not affect coverage provided to CITY and its officers, employees, agents, and volunteers.
v) Insurance is to be placed with California -admitted insurers with a Best' srating of no less than A: VII.
vi) Notice of cancellation or non -renewal must be received by CITY at least thirty days prior to such change.
c) Deductibles and Self -Insured Retentions. CONTRACTOR shall disclose the self -insured retentions and deductibles before beginning any of the
122
Docusign Envelope ID: 7A2B03A8- 6466- 4B3E- 9135- FDFDOFCECF7D CITY OF LATHROP - MP ENVIRONMENTAL SERVICES, INC.
EMERGENCY REMOVAL AND DISPOSAL OF ADDITIONAL HAZARDOUS WASTE FROM THE
BACKWASH TANK AT THE LATHROP WATER TREATMENT FACILITY (LAWTF) services or work called for by any term of this Agreement. During the period covered by this Agreement, upon express written authorization of CITY Manager, CONTRACTOR may increase such deductibles or self -insured retentions with respect to CITY, its officers, employees, agents, and volunteers.
The CITY Manager may condition approval of an increase in deductible or self -insured retention levels upon a requirement that CONTRACTOR procure a bond guaranteeing payment of losses and related investigations, claim administration, and defense expenses that is satisfactory in all respects to each of them.
d) Notice of Reduction in Coverage. In the event that any coverage required under subsections ( a), (b), or (c) of this section of the Agreement is reduced, limited, or materially affected in any other manner, earliest
CONTRACTOR
possible
shall
opportunity
provide
and
written
in
notice
no case
to CITY
later than
at CONTRACTOR' S
five days after
CONTRACTOR is notified of the change in coverage.
e) In addition to any other remedies CITY may have if CONTRACTOR fails to provide or maintain any insurance policies or policy endorsements to the extent and within the time herein required, CITY may, at its sole option:
i) Obtain such insurance and deduct and retain the amount of the premiums for such insurance from any sums due under the Agreement;
ii) Order CONTRACTOR to stop work under this Agreement or withhold any payment which becomes due to CONTRACTOR
hereunder, or both stop work and withhold any payment, until CONTRACTOR demonstrates compliance with the requirements hereof;
iii) Terminate this Agreement.
Exercise of any of the above remedies, however, is an alternative to other remedies CITY may have and is not the exclusive remedy for CONTRACTOR' Sbreach.
INDEMNIFICATION
Contractor agrees to protect, defend, indemnify and hold City, its City Council members, officers, employees, engineer, and consultants harmless from and against any and all claims, demands, liabilities, losses, damages, costs, expenses, liens, penalties, suits, or judgments, arising in whole or in part, directly or indirectly, at any time from any injury to or death of persons or damage to property as a result of the willful or negligent act or omission of Contractor, or which results from Contractor' snoncompliance with any Law respecting the condition, use, occupation or safety of the Project site, or any part thereof, or which arises from Contractor' sfailure to do anything required under this Contract or for doing anything which Contractor is required not to do under this Contract, or which arises from conduct for which any Law imposes strict liability on Contractor in the performance of or failure to perform the terms and conditions of this Contract,
123
Docusign Envelope ID: 7A2B03A8- 8466- 4B3E- 9135- FDFDOFCECF7D CITY OF LATHROP - MP ENVIRONMENTAL SERVICES, INC.
EMERGENCY REMOVAL AND DISPOSAL OF ADDITIONAL HAZARDOUS WASTE FROM THE
BACKWASH TANK AT THE LATHROP WATER TREATMENT FACILITY ( LAWTF) except as may arise from the sole willful or negligent act or omission of City or any of its City Council members, officers, employees.
This indemnification shall extend to any and all claims, demands, or liens made or filed by reason of any construction, renovation, or remodeling work performed by Contractor under this Contract at any time during the term of this Contract, or arising thereafter.
SEVERABILITY
Nothing contained in the Contract shall be construed so as to require the commission of any act contrary to law. Should a conflict arise between any provision contained herein and any present or future statute, law, ordinance or regulation contrary to which the parties have no legal right to contract or act, the latter shall prevail and the provision of this Contract which is affected shall be curtailed and limited but only to the extent necessary to bring it within the requirements of the law. If such curtailment or limitation is not possible, the affected provision shall be of no force and effect. Except as aforesaid, such illegality shall not affect the validity of this Contract.
COMPLETE AGREEMENT
This Contract supersedes any and all agreements, either oral or in writing, between the Parties with respect to the subject matter herein.
Each party to this Contract acknowledges that no representation by any party which is not embodied herein or any other agreement, statement, or promise not contained in this Contract shall be valid and binding.
INTERPRETATION
I)
m)
The parties hereto acknowledge and agree that each has been given the opportunity to independently review this Contract with legal counsel, and/ or has the requisite experience and sophistication to understand, interpret and agree to the particular language of the provisions of the Contract.
In the event of a controversy or dispute between the parties concerning the provisions herein, this document shall be interpreted according to the provisions herein and no presumption shall arise concerning the draftsmanship of such provision.
APPLICABLE LAW
n) The parties hereto understand and agree that the terms of this Contract, and its Exhibits, have been negotiated and executed within the State of California and shall be governed by and construed under the laws of the State of California. o) In the event of a dispute concerning the terms of this Contract, the parties hereto expressly agree that the venue for any legal action shall be with the appropriate court in the County of San Joaquin, State of California.
124
Docusign Envelope ID: 7A2B03A8- B466- 4B3E- 9135- FDFDOFCECF7D CITY OF LATHROP - MP ENVIRONMENTAL SERVICES, INC.
EMERGENCY REMOVAL AND DISPOSAL OF ADDITIONAL HAZARDOUS WASTE FROM THE
BACKWASH TANK AT THE LATHROP WATER TREATMENT FACILITY ( LAWTF)
SIGNATURES
The individuals executing this Agreement represent and warrant that they have the right, power, legal capacity, and authority to enter into and to execute this Agreement on behalf of the respective legal entities of the CONSULTANT and the CITY. This agreement shall inure to the benefit of and be binding upon the parties hereto and their respective successors and assigns.
125
Docusign Envelope ID: 7A2B03A8- 8466- 483E- 9135- FDFDOFCECF7D CITY OF LATHROP - MP ENVIRONMENTAL SERVICES, INC.
EMERGENCY REMOVAL AND DISPOSAL OF ADDITIONAL HAZARDOUS WASTE FROM THE
BACKWASH TANK AT THE LATHROP WATER TREATMENT FACILITY ( LAWTF) Approved as to Form:
Recommended for Approval:
Approved by:
Contractor:
City of Lathrop
City Attorney
Salvador Navarrete Date
City of Lathrop
Assistant City Manager
Michael King
City of Lathrop
390 Towne Centre Drive
Lathrop, CA 95330
I N 2O25
Date
Stephen J. Salvatore
City Manager
Date
MP Environmental Services, Inc.
Gina Blankenship, Facility Manager
3400 Manor Street
Bakersfield, CA 93308
661) 393- 0205
Fed ID # 77- 0262888
Lathrop Business License # NLB- 001721- 205
rDocusiyned
by;
ibikAa• BQ4' kcn4 Mp
OSAe14rDeC4r4of...
Signature
Gina Blankenship
8/ 13/ 2025
Date
Facility Manager
Print Name and Title
DocuSigned by;
c4crAMD4DOC4Nr...
Signature
Richard Turner
8/ 13/ 2025
Date
Controller
Print Name and Title
126
Docusign Envelope ID: 7A2B03A8- 6466- 4B3E- 9135- FDFDOFCECF7D August 11, 2025
Bonnie Evans
City of Lathrop
Via Email — bevans( a.. ci. lathrop. ca. us
Re: Emergency Backwash Tank Hazardous Waste Disposal
Additional Funding Request
Dear Ms. Evans,
MP would like to request additional funding for the above reference project. As you know the original contract was issued in the amount of $115, 996 to cover the estimated costs associated with on -site cleaning and off -site disposal of the waste The on -site cleaning component has been completed and came in very close to our original estimate. We also anticipate that the disposal portion should also be very close to our original estimate. The additional funds are needed to cover the following costs, which were not part of our original estimate:
Delivery of eighteen roll -off bins with liners $ 16,83 Rental of 18 Dewatering Bins for 90 days @ $45/ day $ 72, 900 Sample Collection and Analysis $ 2,00
Additional Funds Requested $ 91, 283
Please note the above is an estimate and could change based on rental charges for the containers. Should the dewatering bins be able to be shipped prior to ninety days, the rental cost listed above would decrease. However, should the dewatering bins have to remain on site longer than 90 days, this cost would increase.
Please let us know if you have questions or need any additional information to process this request.
Thank you.
Sincerely,
Ora 84404
Facility Manager
3400 Manor Street
Bakersfield, CA 93308
661) 393- 1151 ( 800) 458- 3036
661) 393-834 fax
www. mpenviro. com
EXHIBIT A
127
ATTACHMENT E
City of
Office of the City Manager
September PP, 2025
390 Towne Centre Drive, Lathrop, CA 95330
Phone ( 209) 941- 7220 — Fax ( 209) 941- 7229
www. ci. lathrop. ca. us
NOTICE TO PROCEED
Utility Service Company, Inc.
Chris Vanderstar, Director of Sales West Region
P. O. Box 1350
Perry, GA 311069
Re: Emergency Service Contract for the Replacement of the Floating Decanter and Swing joint Inside of the Backwash Tank at the Lathrop Water Treatment Facility ( LAWTF) Dear Chris Vanderstar:
Enclosed please find your original executed Emergency Service Contract for the Replacement of the Floating Decanter and Swing Joint Inside of the Backwash Tank at the Lathrop Water Treatment Facility ( LAWTF). This is your Notice to Proceed to the attached Emergency Service Contract.
Should you have any questions regarding this contract, please contact Frank Vallejo, the staff member directly involved with this work, at (209) 941- 7424.
Thank you,
Stephen J. Salvatore
City Manager
Copy: Teresa Vargas, City Clerk
Project File
128
Docusign Envelope ID: 840898AF- 40A-967- 90A3- BF198B534920
EMERGENCY SERVICE CONTRACT BETWEEN
THE CITY OF LATHROP AND UTILITY SERVICE CO., INC.
TO REPLACE THE FLOATING DECANTER AND SWING JOINT INSIDE OF THE
BACKWASH TANK AT THE LATHROP WATER TREATMENT FACILITY ( LAWTF) THIS SERVICE CONTRACT ( hereinafter " Contract") is made on September to , 2025, by and between the City of Lathrop, a municipal corporation of the State of California hereinafter " City") and Utility Service Co., Inc. (hereinafter " Contractor"), whose Taxpayer Identification Number is 58- 1920989.
For and in consideration of the following covenants, terms and conditions, City and Contractor ( the parties) agree:
SCOPE OF WORK
Contractor agrees to perform the Emergency Replacement of the Floating Decanter and Swing Joint inside of the Backwash Tank at the LAWTF in accordance with the scope of work and fee proposal provided by the Contractor, attached hereto as Exhibit "A" and incorporated herein by reference. Contractor agrees to diligently perform these services in accordance with the upmost standards of its profession and to City' ssatisfaction.
The work is being performed as emergency work as defined in Lathrop Municipal Code LMC) 2. 32. 020. The City did not have adequate time to follow the public bid process. Pursuant to LMC 2. 36. 080, purchasing procedures may be eliminated in emergency situations to efficiently and timely maintain essential public services and to preserve property. Contractor agrees to complete the work to the satisfaction of the City and subject to inspection, or its representatives.
CONTRACT PRICE
The City agrees to pay and the Contractor agrees to accept, in full payment for the work above agreed to be done based on a time and materials basis not to exceed $ 85, 302. 00 for the replacement of the floating decanter and swing joint, attached hereto as Exhibit " A". In no event shall CONTRACTOR be entitled to compensation for work not included in Exhibit " A" unless a written change order or authorization describing the extra work and payment terms has been executed by CITY' sCity Manager prior to the commencement of the work.
TIME FOR PERFORMANCE
The effective date of this contract is September to, 2025, and the work shall be started within 5 working days of receipt of the equipment. The work shall be completed within 10 total working days of work commencement.
PERMITS; COMPLIANCE WITH LAW
The Contractor shall, at its expense, obtain all necessary permits, licenses, easements, etc., for the construction of the project, give necessary notices, pay all fees required by law, and comply with all laws, ordinances, rules and regulations relating to the work and to the preservation of the public health and safety.
129
Docusign Envelope ID: 840898AF- 40A-967- 90A3- BF198B534920 CITY OF LATHROP - UTILITY SERVICE CO., INC.
EMERGENCY REPLACEMENT OF THE FLOATING DECANTER AND SWING JOINT INSIDE OF THE
BACKWASH TANK AT THE LATHROP WATER TREATMENT FACILITY ( LAWTF)
INSPECTION BY CITY
The Contractor shall at all times maintain proper facilities and provide safe access for inspection by the City to all parts of the work, and to the shops wherein the work is in preparation.
Where the Specifications require work to be specially tested or approved, it shall not be tested or covered up without timely, written approval by the City.
Should any such work be covered up without such notice, approval, or consent, it must, if required by City, be uncovered for examination at the Contractor' s expense.
NOTICE
Any notice from one party to the other under the Contract shall be in writing and shall be dated and signed by the party giving such notice or by a duly authorized representative of such party. Any such notice shall not be effective for any purpose whatsoever unless served in the following manner.
a) If the notice is given to the City, by personal delivery thereof to the City' s Director
of Public Works, or by depositing the same in the United States mail, enclosed in a sealed envelope, addressed to the City' s Director of Public Works, postage prepaid and certified;
b) If the notice is given to the Contractor, by personal delivery thereof to said Contractor or to its duly authorized representative at the site of the project, or by depositing the same in the United States mail, enclosed in a sealed envelope, addressed to the Contractor at the address set forth in the Contractor' sBid postage prepaid and certified; or
c) If the notice is given to the surety or any other person, by personal delivery to such surety or other person, or by depositing the same in the United States mail, enclosed in a sealed envelope, addressed to such surety or other person, as the case may be, at the address of such surety or person last communicated by it to the party giving the notice, postage prepaid and certified.
ACCIDENT PREVENTION
Precaution shall be exercised at all times for the protection of persons ( including employees) and property.
The safety provisions of applicable laws, building and construction codes shall be observed. Machinery, equipment, and other hazards shall be guarded or eliminated in accordance with the safety provisions of the Construction Safety Orders issued by the Occupational Safety and Health Standards Board of the State of California.
CONTRACTOR' S WARRANTY
The City shall not, in any way or manner, be answerable or suffer loss, damage, expense or liability for any loss or damage that may happen to said building, work, or equipment or any part thereof, or in, on, or about the same during its construction and before acceptance.
Contractor unqualifiedly warrants all work and materials to be free of defects whether performed
130
Docusign Envelope ID: 840898AF- 40M-967- 90A3- BF198B534920 CITY OF LATHROP - UTILITY SERVICE CO., INC.
EMERGENCY REPLACEMENT OF THE FLOATING DECANTER AND SWING JOINT INSIDE OF THE
BACKWASH TANK AT THE LATHROP WATER TREATMENT FACILITY ( LAWTF) or installed by it or by any subcontractor or supplier in the project which is the subject of this Contract.
APPRENTICES
d) The Contractor' s attention is directed to the provisions of Sections 1777. 5, 1777. 6, and 1777. 7of the California Labor Code concerning employment of apprentices by the Contractor or any subcontractor under him. In addition, Contractor shall obtain a certificate of apprenticeship before employing any apprentice pursuant to Sections 1777. 5, 1777. 6and 1777. 7of the California Labor Code. e) Information relative to apprenticeship standards, wage schedules, and other requirements may be obtained from the Director of Industrial Relations, ex officio the Administrator of Apprenticeship, San Francisco, California, or from the Division of Apprenticeship Standards and its branch offices.
f) Knowing violations of Section 1777. 5 will result in forfeiture not to exceed one hundred dollars ($ 100) for each calendar day of non- compliance pursuant to Section 1777. 7.
HOURS OF WORK
Eight ( 8) hours of work in any calendar day shall constitute alegal day' s work. The
Contractor and each subcontractor shall forfeit, as penalty to the City, twenty- five dollars ($ 25) for each worker employed in the execution of work on the Project by the Contractor or any subcontractor under him for each calendar day during which such worker is required or permitted to work more than eight ( 8) hours in any one calendar day and forty ( 40) hours in any calendar week in violation of the provisions of the Labor Code, and in particular, Section 1810 to Section 1815, thereof, inclusive, except that work performed by employees of the Contractor and his subcontractors in excess of eight hours per day at not less than one and one half times the basic rate of pay, as provided in Labor Code section 1815.
PAYROLL RECORDS
Pursuant to Labor Code section 1776, as amended from time to time, the Contractor and each subcontractor shall keep records showing the name, address, social security number, work classification, straight time and overtime hours paid each day and week, and the actual per diem wages paid to each journeyman, apprentice, worker or other employee employed by him or her in connection with the work.
The certified payroll records shall be on forms provided by the Division of Labor Standards Enforcement or shall contain the same information as the forms provided by the Division.
The payroll records shall be certified and shall be available for inspection at all reasonable hours at the principal office of the Contractor on the following basis:
g) A certified copy of the employee' s payroll records shall be made available for inspection or furnished to such employee or his or her authorized representative on request.
131
Docusign Envelope ID: 840898AF- 40A-967- 90A3- BF198B534920 CITY OF LATHROP - UTILITY SERVICE CO., INC.
EMERGENCY REPLACEMENT OF THE FLOATING DECANTER AND SWING JOINT INSIDE OF THE
BACKWASH TANK AT THE LATHROP WATER TREATMENT FACILITY ( LAWTF) h) A certified copy of all payroll records shall be made available for inspection or furnished upon request, or as required by Labor Code section 1771. 7to the City, the Division of Labor Standards Enforcement and the Division of Apprenticeship Standards of the Department of Industrial Relations.
i) A certified copy of all payroll records shall be made available upon request to the public for inspection or copies thereof made; provided, however, that if request by the public shall be made through either the City, the Division of Apprenticeship Standards, or the Division of Labor Standards Enforcement, if as requested, payroll records have been provided pursuant to paragraph ( b), the requesting party shall, prior to being provided the records, reimburse the cost of preparation by the Contractor, subcontractors and the entity through which the request was made.
The public shall not be given access to such records at the principal office of the Contractor.
The Contractor shall file a certified copy of the payroll records with the entity that requested such records within ten ( 10) calendar days after receipt of a written request.
Any copy of records made available for inspection as copies and furnished upon request to the public or the City, the Division of Apprenticeship Standards, or the Division of Labor Standards Enforcement, shall be marked or obliterated in such a manner as to prevent disclosure of an individual' s name, address, and social security number. The name and address of the Contractor or any subcontractor performing work on the Project shall not be marked or obliterated.
The Contractor shall inform the City of the location of the payroll records, including the street address, city and county, and shall, within five ( 5) calendar days, provide a notice of a change of location and address.
In the event of noncompliance with the requirements of this section, the Contractor shall have ten ( 10) calendar days in which to comply subsequent to receipt of written notice specifying in what respects the Contractor must comply with this section. Should noncompliance still be evident after such ten ( 10) calendar day period, the Contractor shall, as a penalty to the City, forfeit twenty- five dollars ($ 25) for each calendar day, or portion thereof, for each worker until strict compliance is effectuated.
Upon the request of the Division of Labor Standards Enforcement, such penalties shall be withheld from payments due Contractor.
PREVAILING WAGES
0) The Contractor is aware of the requirements of California Labor Code Sections 1720 et seq. and 1770 et seq., as well as California Code of Regulations, Title 8, section 16000 et seq. ("Prevailing Wage Laws") which require the payment of prevailing wage rates and the performance of other requirements on certain " public works" and " maintenance" projects. Since this Contract involves an applicable public works" or " maintenance" project, as defined by the Prevailing Wage Laws, and since the total compensation is $ 1, 000 or more, Contractor agrees to fully comply with such Prevailing Wage Laws. The Contractor shall obtain a copy of
the prevailing rates of per diem wages applicable to the work to be performed by subcontractors from the website of the Division of Labor Statistics and Research
132
Docusign Envelope ID: 840898AF- 40A-967- 90A3- BF198B534920 CITY OF LATHROP - UTILITY SERVICE CO., INC.
EMERGENCY REPLACEMENT OF THE FLOATING DECANTER AND SWING JOINT INSIDE OF THE
BACKWASH TANK AT THE LATHROP WATER TREATMENT FACILITY ( LAWTF) of the Department of Industrial Relations located at
http:// www. dir. ca. gov/ dIsr/ PWD/ index. htm. In the alternative, the City shall provide Contractor with a copy of the prevailing rates of per diem wages applicable to the work to be performed by subcontractors.
Contractor shall make copies of the prevailing rates of per diem wages for each craft, classification or type of worker needed to perform work on the Project available to interested parties upon request, and shall post copies at the Contractor' s
principal place of business and at the Project site.
Contractor shall defend, indemnify and hold the City, its elected officials, officers, employees and agents free and harmless from any claims, liabilities, costs, penalties or interest arising out of any failure or allege failure to comply with the Prevailing Wage Laws.
k) The Contractor and each subcontractor shall forfeit as a penalty to the City not more than fifty dollars ($ 50) for each calendar day, or portion thereof, for each worker paid less than the stipulated prevailing rate for any work done by him, or by any subcontract under him, in violation of the provisions of the California Labor Code. The difference between such stipulated prevailing wage rate and the amount paid to each worker for each calendar day or portion thereof for which each worker was paid less than the stipulated prevailing wage rate shall be paid to each worker by the Contractor.
INSURANCE
On or before beginning any of the services or work called for by any term of this Agreement, CONTRACTOR, at its own cost and expense, shall carry, maintain for the duration of the Agreement, and provide proof thereof that is acceptable to the CITY the insurance specified in subsections ( a) through ( c) below with insurers and under forms of insurance satisfactory in all respects to the CITY. CONTRACTOR shall not allow any subcontractor to commence work on any subcontract until all insurance required of the CONTRACTOR has also been obtained for the subcontractor. Verification of this insurance shall be submitted and made part of this Agreement prior to execution.
a) Workers' Compensation. CONTRACTOR shall, at CONTRACTOR' Ssole cost and expense, maintain Statutory Workers' Compensation Insurance and Employer' s Liability Insurance for any and all persons employed directly or indirectly by CONTRACTOR. Said Statutory Workers' Compensation Insurance and Employer' s Liability Insurance shall be provided with limits of not less than one million dollars ($ 1, 000,0). In the alternative, CONTRACTOR may rely on a self- insurance program to meet these requirements provided that the program of self- insurance complies fully with the provisions of the California Labor Code. The insurer, if insurance is provided, or the CONTRACTOR, if a program of self- insurance is provided, shall waive all rights of subrogation against the CITY for loss arising from work performed under this Agreement.
b) Commercial General and Automobile Liability Insurance. CONTRACTOR, at CONTRACTOR' Sown cost and expense, shall maintain commercial
133
Docusign Envelope ID: 840898AF- 40A-967- 90A3- BF198B534920 CITY OF LATHROP - UTILITY SERVICE CO., INC.
EMERGENCY REPLACEMENT OF THE FLOATING DECANTER AND SWING JOINT INSIDE OF THE
BACKWASH TANK AT THE LATHROP WATER TREATMENT FACILITY ( LAWTF) general and automobile liability insurance for the period covered by this Agreement in an amount not less than one million dollars per occurrence 1, 000,0), combined single limit coverage for risks associated with the work contemplated by this Agreement.
If Commercial General Liability Insurance or an Automobile Liability form or other form with a general aggregate limit is used, either the general aggregate limit shall apply separately to the work to be performed under this Agreement or the general aggregate limit shall be at least twice the required occurrence limit. Such coverage shall include but shall not be limited to, protection against claims arising from bodily and personal injury, including death resulting therefrom, and damage to property resulting from activities contemplated under this Agreement, including the use of owned and non -owned automobiles.
Coverage shall be at least as broad as Insurance Services Office Commercial General Liability occurrence form CG 0001 ( ed. 11/ 88) and Insurance Services Office Automobile Liability form CA 0001 ( ed. 12/ 90) Code 1 ( any auto).
Each of the following shall be included in the insurance coverage or added as an endorsement to the policy:
i) CITY, its officers, employees, and volunteers are to be covered as insured with respect to each of the following: liability arising out of activities performed by or on behalf of CONTRACTOR, products and completed operations of CONTRACTOR; premises owned, occupied or used by CONTRACTOR. The coverage shall contain no special limitations on the scope of protection afforded to CITY, its officers, employees, agents, or volunteers.
ii) The insurance shall cover on an occurrence or an accident basis, and not on a claim made basis.
iii) An endorsement must state that coverage is primary insurance and that no other insurance affected by the CITY will be called upon to contribute to a loss under the coverage.
iv) Any failure of CONTRACTOR to comply with reporting provisions of the policy shall not affect coverage provided to CITY and its officers, employees, agents, and volunteers.
v) Insurance is to be placed with California -admitted insurers with a Best' srating of no less than A: VII.
vi) Notice of cancellation or non - renewal must be received by CITY at least thirty days prior to such change.
c) Deductibles and Self -Insured Retentions. CONTRACTOR shall disclose the self -insured retentions and deductibles before beginning any of the
134
Docusign Envelope ID: 840898AF- 40A-967- 90A3- BF198B534920 CITY OF LATHROP - UTILITY SERVICE CO., INC.
EMERGENCY REPLACEMENT OF THE FLOATING DECANTER AND SWING JOINT INSIDE OF THE
BACKWASH TANK AT THE LATHROP WATER TREATMENT FACILITY ( LAWTF) services or work called for by any term of this Agreement. During the period covered by this Agreement, upon express written authorization of CITY Manager, CONTRACTOR may increase such deductibles or self -insured retentions with respect to CITY, its officers, employees, agents, and volunteers.
The CITY Manager may condition approval of an increase in deductible or self -insured retention levels upon a
requirement that CONTRACTOR
procure a bond guaranteeing payment of losses and related investigations, claim administration, and defense expenses that is satisfactory in all respects to each of them.
d) Notice of Reduction in Coverage. In the event that any coverage required under subsections ( a), (b), or ( c) of this section of the Agreement is reduced, limited, or materially affected in any other manner, earliest
CONTRACTOR
possible
shall
opportunity
provide
and
written
in
notice
no case
to CITY
later than
at CONTRACTOR' S
five days after
CONTRACTOR is notified of the change in coverage.
e) In addition to any other remedies CITY may have if CONTRACTOR fails to provide or maintain any insurance policies or policy endorsements to the extent and within the time herein required, CITY may, at its sole option:
i) Obtain such insurance and deduct and retain the amount of the premiums for such insurance from any sums due under the Agreement;
ii) Order CONTRACTOR to stop work under this Agreement or withhold any payment which becomes due to CONTRACTOR
hereunder, or both stop work and withhold any payment, until CONTRACTOR demonstrates compliance with the requirements hereof;
iii) Terminate this Agreement.
Exercise of any of the above remedies, however, is an alternative to other remedies CITY may have and is not the exclusive remedy for CONTRACTOR' Sbreach.
INDEMNIFICATION
Contractor agrees to protect, defend, indemnify and hold City, its City Council members, officers, employees, engineer, and consultants harmless from and against any and all claims, demands, liabilities, losses, damages, costs, expenses, liens, penalties, suits, or judgments, arising in whole or in part, directly or indirectly, at any time from any injury to or death of persons or damage to property as a result of the willful or negligent act or omission of Contractor, or which results from Contractor' s
noncompliance with any Law respecting the condition, use, occupation or safety of the Project site, or any part thereof, or which arises from Contractor' sfailure to do anything required under this Contract or for doing anything which Contractor is required not to do under this Contract, or which arises from conduct for which any Law imposes strict liability on Contractor in the performance of or failure to perform the terms and conditions of this Contract,
135
Docusign Envelope ID: 840898AF- 40A-967- 90A3- BF198B534920 CITY OF LATHROP - UTILITY SERVICE CO., INC.
EMERGENCY REPLACEMENT OF THE FLOATING DECANTER AND SWING JOINT INSIDE OF THE
BACKWASH TANK AT THE LATHROP WATER TREATMENT FACILITY ( LAWTF) except as may arise from the sole willful or negligent act or omission of City or any of its City Council members, officers, employees.
This indemnification shall extend to any and all claims, demands, or liens made or filed by reason of any construction, renovation, or remodeling work performed by Contractor under this Contract at any time during the term of this Contract, or arising thereafter.
SEVERABILITY
Nothing contained in the Contract shall be construed so as to require the commission of any act contrary to law. Should a conflict arise between any provision contained herein and any present or future statute, law, ordinance or regulation contrary to which the parties have no legal right to contract or act, the latter shall prevail and the provision of this Contract which is affected shall be curtailed and limited but only to the extent necessary to bring it within the requirements of the law. If such curtailment or limitation is not possible, the affected provision shall be of no force and effect. Except as aforesaid, such illegality shall not affect the validity of this Contract.
COMPLETE AGREEMENT
This Contract supersedes any and all agreements, either oral or in writing, between the Parties with respect to the subject matter herein.
Each party to this Contract acknowledges that no representation by any party which is not embodied herein or any other agreement, statement, or promise not contained in this Contract shall be valid and binding.
INTERPRETATION
I)
m)
The parties hereto acknowledge and agree that each has been given the opportunity to independently review this Contract with legal counsel, and/ or has the requisite experience and sophistication to understand, interpret and agree to the particular language of the provisions of the Contract.
In the event of a controversy or dispute between the parties concerning the provisions herein, this document shall be interpreted according to the provisions herein and no presumption shall arise concerning the draftsmanship of such provision.
APPLICABLE LAW
n) The parties hereto understand and agree that the terms of this Contract, and its Exhibits, have been negotiated and executed within the State of California and shall be governed by and construed under the laws of the State of California. o) In the event of a dispute concerning the terms of this Contract, the parties hereto expressly agree that the venue for any legal action shall be with the appropriate court in the County of San Joaquin, State of California.
136
Docusign Envelope ID: 840898AF- 40A-967- 90A3- BF198B534920 CITY OF LATHROP - UTILITY SERVICE CO., INC.
EMERGENCY REPLACEMENT OF THE FLOATING DECANTER AND SWING JOINT INSIDE OF THE
BACKWASH TANK AT THE LATHROP WATER TREATMENT FACILITY ( LAWTF)
SIGNATURES
The individuals executing this Agreement represent and warrant that they have the right, power, legal capacity, and authority to enter into and to execute this Agreement on behalf of the respective legal entities of the CONSULTANT and the CITY. This agreement shall inure to the benefit of and be binding upon the parties hereto and their respective successors and assigns.
137
Docusign Envelope ID: 840898AF- 40A-967- 90A3- BF198B534920 CITY OF LATHROP - UTILITY SERVICE CO., INC.
EMERGENCY REPLACEMENT OF THE FLOATING DECANTER AND SWING JOINT INSIDE OF THE
BACKWASH TANK AT THE LATHROP WATER TREATMENT FACILITY ( LAWTF) Approved as to Form:
Recommended for Approval:
Approved by:
Contractor:
City of Lathrop
City Attorney
Salvador Navarrete Date
City of Lathrop
Assistant City Manager
Michael
1— —
King
City of Lathrop
390 Towne Centre Drive
Lathrop, CA 95330
Date
Stephen J. Salvatore Date
City Manager
Utility Service Company, Inc.
P. O. Box 1350
Perry, GA 31069
855) 526- 4413
Fed ID # 58. 1920989
Lathrop Business License # LB -001013- 2025
Signed by:
Lois VA A„ ott st* Y
oaee6owowaoa ..
Signature Date
9/ 2/025
Chris Vanderstar Director of Sales
Print Name and Title
138
Docusign Envelope ID: 840898AF- 40A-967- 90A3- BF198B534920 EXHIBIT A
USG WATER
SOLUTIONS -
Proposal from
UTILITY SERVICE CO., INC.
535 Gen. Courtney Hodges Blvd • P O Box 1350 • Perry, GA 31069 Toll -free: 855- 526- 4413 I Fax: 478- 97- 2991
usgwater. com
Date: 08/ 22/5 Submitted by: AJ Vela Local Phone: (720) 670- 2861 SFID: 116865 MP/ CS Asset: n
Entity Proposal Submitted To (" Customer"):
City of Lathrop
Phone Number:
209- 92- 0019
Fax Number:
Street Address:
2112 E. Louise Ave
Description of Work to be Performed:
Backwash Decanter Amt Repair - Concrete Services
City:
Lathrop
State:
CA
Zip Code:
95330
Asset Name:
Backwash Tank
Accounts Payable Contact Nome:
Bonnie Evans
Email:
bevans@ci. Iathrop. ca. us
Job Site Address:
2112 E. Louise Ave, Lathrop CA 95330
Job Contact (Inspection Reports):
Frank Vallejo
Email:
fvallejo@ci. lathrop. ca. us
County/ Parish:
San Joaquin
Asset Size:
48' Dx23' H
Asset Style:
Backwash Tank
Utility Service Co., Inc. agrees to provide all labor, equipment, and materials needed to complete the following:
Please see attached Exhibit( s), which are incorporated herein by reference:
1. Exhibit A — Scope of Work
2. Exhibit B — Terms and Conditions
Please sign and date this proposal and fax one copy to our office.
Eighty- fivethousand three -hundred and two -----------------_-_-_--------_-.. 001100 Dollars $ ----- 85, 302. 00 Payment to be made as follows: Payment Due In Full Upon Completion of Work — plus all applicable taxes Remittance Address: Utility Service Co., Inc., P O Box 207362, Dallas, TX 75320-62 This Proposal, together with its Exhibit A — Scope of Work and Exhibit B - Terms and Conditions, and any additional exhibits that Utility Service Co., Inc. and the Customer agree to incorporate and attach to this Proposal (collectively, this " Proposal") constitutes the entire and exclusive agreement between Utility Service Co., Inc. (which for purposes herein shall collectively include its affiliate companies) and Customer ( collectively, the " Parties"). This Proposal may be withdrawn by Utility Service Co., Inc. at any time prior to acceptance. Customer assents to the terms and conditions in Exhibit B and agrees that the terms and conditions in Exhibit B shall govern with respect to this Proposal and the services provided by Utility Service Co., Inc. No additional or conflicting terms or conditions included in any purchase order, hyperlink, acknowledgement or invoice of Customer not expressly incorporated into this Proposal shall be binding on the Parties or this Proposal.
Note: This proposal shall expire automatically
Ninety (90) days following the date of this Proposal.
Authorized --"
USCJ Signature ,••-
Acceptance of Proposal The prices, scope of work, and terms and conditions by Customer to Utility Service Co., Inc. as set forth herein. of this Proposal are satisfactory and are hereby accepted. Payment will be made please provide Sales Tax Exemption Certificate.
Signature
Is Customer Exempt from Sales Tax? I — s No Yes If Exempt, Fiscal Year Beginning Month Customer
Date of Acceptance Printed Name
FOR INTERNAL USE ONLY
SFID: CN: SO: PPB: BM MP / CS PN:
2025 Utility Service Co., Inc. CONFIDENTIAL Page 1
139
Docusign Envelope ID: 840898AF- 40A-967- 90A3- BF198B534920
USG WATER
SOLUTIONS -
Proposal from
UTILITY SERVICE CO., INC.
535 Gen. Courtney Hodges Blvd - P O Box 1350 - Perry, GA 31069 Toll -free: 855- 526- 4413 1 Fax: 478- 97- 2991
usgwater. com
Exhibit A - Scope of Work
Asset:
Decanter
Replacement
BACKWASH TANK is approximately 48 ft dia x 23 ft Height ( Interior) x 23 ft Height ( Average Exterior Exposed)
This proposal includes the replacement of the installed decanter.
Lead time for the decanter is expected to be 6- 8 weeks and the lead time for the swing arm is expected to be 24 weeks.
Owner will drain, isolate, and washout tank prior to mobilization.
Removal and disposal of installed Decanter.
Install one ( 1) FSED- 8Floating Decanter (316 SS) including float assembly, decanter head, and 8" decant dishcarge piping with flange connection and new ductile iron flanged swing joint.
Notes/ Exclusions: - Scorecard pricing is valid until 02/ 14/ 2026. Specialized goods and services are being rendered as part of this Scope of Work. Due to subcontractor and/ or supplier requirements pricing may fluctuate due to current market conditions.
USG Water Solutions reserves the right to request a change order due to unforeseen market conditions that increase the cost of the goods or services provided by suppliers or subcontractors.
Owner shall isolate, drain and remove all sediment from the Asset prior to renovation operations.
Owner shall provide that no moisture or water is entering the Asset during renovation operations.
Interior disinfection of Asset walls, floor and ceiling in accordance with AWWA C652/653 (Contact Spray Method) is included. Owner shall perform any testing and return of Asset back to service.
The following items are not furnished or inlcuded in this pricing:
Tanks; any pipe, supports, fittings or valves except those specifically included above; out of basin or interconnecting piping, valves or supports; tank wall spools and interconnecting hardware and gaskets; controls; start- up service; jobsite testing; jobsite storage; taxes; duties; insurance and other items not specifically mentioned in the body of this proposal.
Water and power must be available within 150' of Asset.
Bonds are not included.
Local Wage Rates are included.
Lead and / or Asbestos abatement of any kind is not included.
USCI is not responsible for differing, latent or hidden conditions, including weather.
2025 Utility Service Co., Inc. CONFIDENTIAL Page 2
140
Docusign Envelope ID: 840898AF- 40A-967- 90A3- BF198B534920
USG WATER
SOLUTIONS -
Proposal from
UTILITY SERVICE CO., INC.
535 Gen. Courtney Hodges Blvd - P O Box 1350 - Perry, GA 31069 Toll -free: 855- 526- 4413 I Fax: 478- 97- 2991
usgwater. com
In the event of a different or unknown problem, USG Water Solutions will be entitled to equitable adjustment in price and time to compensate for additional costs.
All work is expected to occur during acceptable weather and/ or seasonal times. Environmental controls, including dehumidification and auxiliary heating, are not included. Any environmental controls needed will be charged at cost + 15%.
All workers to have 10 -hour OSHA card; any additional safety requirements are subject to request for additional compensation.
This proposal is based upon a visual inspection of the Asset. The Owner and the Company hereby acknowledge and agree that a visual inspection is intended to assess the condition of the Asset for all patent defects.
If latent defects are identified once the Asset has been drained for repairs, the Owner agrees and acknowledges that the Company shall not be responsible to repair the latent defects unless the Owner and the Company renegotiate pricing.
2025 Utility Service Co., Inc. CONFIDENTIAL Page 3
141
Docusign Envelope ID: 840898AF- 40A-967- 90A3- BF198B534920
USG WATER
SOLUTIONS -
Proposal from
UTILITY SERVICE CO., INC.
535 Gen. Courtney Hodges Blvd • P O Box 1350 • Perry, GA 31069 Toll -free: 855- 5264413 I Fax: 478- 97- 2991
usgwater. com
Exhibit B — Terms and Conditions
A. GENERAL TERMS AND CONDITIONS
The Terms and Conditions ( the ' Terms") of this Proposal govem the sale of services ( the Services") by Utility Service Co., Inc. (which for purposes herein shall include its affiliates) to the Customer. All other terns, or variations IP these Terms are excluded unless agreed explidty in writing by a numbered amendment to this Proposal executed by utility Service Co., Inc. and the Customer. Execution of the Proposal by the Customer, whether in writing, on the Internet, by electronic signature, or by e- mail transmission of a signed Proposal shall mean acceptance that these Terms are deemed incorporated into the Proposal and shall form the contract between the Customer and Utility Service Co., Inc. These Terms shag supersede all prior terms, understandings or Proposals between the Customer and Utility Service Co., Inc. H any part of the Terms should be found to be invalid or unenforceable by a court or other competent authority, then the remainder of the Terms shall not be affected. My notice to be given with respect to these Terms by either of the Parties shall be in writing. Notices to the Customer shall be sent to the Customer' saddress on the Proposal, and any notices to Utility Service Co., Inc., including notice of warranty claims by the Customer, shall be sent to: Utility Service Co., Inc., ATTN: Customer Service Department, 535 General Courtney Hodges Boulevard, Post Office Box 1350, Perry, Georgia 31069.
This Proposal has been issued based on the information provided by the Customer and on information currently available to Utility Service Co., Inc. at the time of Proposal issuance.
Any changes or discrepancies in site conditions, concealed conditions where the Services will be performed, changes in environmental, health, and safely regulations or conditions, changes in Customer' sfinancial standing, Customer' srequirements, or any other relevant change or discrepancy in the factual basis upon which this Proposal was created may lead to changes in the offering, including but not limited to, changes in pricing, warranties, quoted scope of work, and/ orterms and conditions. Unless stated otherwise in the Proposal, performance and/ or payment bonds are not included in the price. These bonds can be purchased on request but will be at an additional cost.
B. PRICES, PAYMENT TERMS, COMMITMENT
OF CUSTOMER, CREDIT REPORTING AND
TAXES
Prices, which are expressed in US Dollars, are only valid for the period stated in the Proposal.
If not stated, the validity period is ninety ( 90) days. Unless otherwise stated in the Proposal, the full price shag be due and payable upon completion of the Services, which may or may not include the installation of Equipment. All of Utility Service Co., Inc.' s invoices are due and payable upon receipt. If any payment is not made by the Customer within sixty ( 60) calendar days following the date of the Invoice, Utility Service Co., Inc. reserves the right to charge a late payment charge of one and one- half percent (1. 5%) per month of the outstanding past due balance. Any failure by Customer to make timely payment of any obligation under tltis Proposal shall be deemed a breach. Customer agrees to reimburse Utility Service Co., Inc. for all charges, costs, expenses and attorney' sfees incurred to enforce or collect the amounts due under this Proposal. In the event Customer has a valid dispute with any invoice or amount due, such dispute must be communicated in writing to utility Service Co., Inc. within thirty ( 30) days of the invoice date, describing the amount, Issue and the reason for any dispute. My amounts not disputed within this time frame wilt be deemed to be vatic. Utility Service Co., Inc. and Customer agree to work expeditiously to resolve any dispute. Customer agrees to notify Utility Service Co., Inc. within thirty (30) days of any change in Customer' s name, address, or phone number. By executing this Proposal, Customer authorizes Utility Service Co., Inc. to periodically request your credit reports and bank and trade references.
Upon your request, we will inform you of the name and address of the reporting agency from which we received such a report, ff any. The price listed in the Proposal excludes all taxes unless specifically stated otherwise in the Proposal. The Customer is responsible for payment of all applicable taxes, however designated or incurred in connection with the transactions under this Proposal, and agrees to reimburse Utility Service Co., Inc. for any taxes paid on Customers behalf.
C. DELIVERY OF SERVICES AND INSTALLATION
OF EQUIPMENT
The provision of Services as contemplated herein might require the installation of certain equipment ( the ' Equipment") on the Customers real property or on the improvements to the Customer' sreal property (e.g., water storage tank, etc). All times and dates for the delivery of Services and/ orinstallation of Equipment are approximate, but Utility Service Co., Inc. shall use Its reasonable efforts to respect them. The Parties shall each make commercially reasonable efforts to schedule the Services after the date this Proposal is executed by the Customer. Utility Service Co, Inc. shall not be liable for any loss or damage resulting from late delivery of the Services or installation of Equipment.
D. ACCESS TO CUSTOMER' SFACILITY OR REAL
PROPERTY
Customer hereby agrees to provide Utility Service Co., Inc. with reasonable access to its facility or real property to perform the Services. ' Reasonable access" shall include passable roads for ingress and egress as well as sufficient usable ground space for Utility Service Co., Inc.' s equipment and materials needed to perform the Services.
Unless otherwise provided in this Proposal, the price of this Proposal does not include the cost to lease additional real property so that Utility Service Co., Inc. will have sufficient usable ground space to stage its equipment and materials needed to perform the Services. Any such cost would be in addition to the price of the Proposal, and if needed, the Customer agrees to negotiate an amendment to this Proposal to modify the pricing in good faith.
E. RISK OF LOSS
Risk of loss or damage to the Equipment if applicable to this Proposal, shall pass to the Customer upon delivery of the Equipment to the named place of destination.
F. TITLE TO EQUIPMENT
If the sale of Equipment is included in this Proposal, the title in the Equipment shall remain with Utility Service Co., Inc. until the price of the Proposal is paid in fug. The Customer assents that Utility Service Co., Inc. may enter upon the Customer' sreal properly and/ or facility to repossess the Equipment if payment( s) are not received in full by their due date( s).
G. SCOPE OF WARRANTY
Subject to the imitations contained herein, Utility Service Co., Inc. represents that for a period of one ( 1) year from the earlier of ( i) the completion of the Services (to include the installation of the Equipment, if applicable to this Proposal) or ( ii) the Customer' s retum to use of the asset that is the subject matter of this Proposal (' Warranty Period", the Services and Equipment, if applicable, will be free from defects in materials and workmanship and will substantially conform to the specifications set forth In Exhibit A ( NVarrant). WITH THE EXCEPTION OF THE REPRESENTATION IN THE FOREGOING SENTENCE, UTILfTY SERVICE CO., INC. MAKES NO OTHER EXPRESS OR IMPLIED WARRANTIES OF ANY
KIND WITH RESPECT TO THE SUBJECT MATTER HEREOF AND ALL OTHER
WARRANTIES ARE HEREBY DISCLAIMED, INCLUDING, WITHOUT LIMITATION, THE
IMPLIED WARRANTY OF MERCHANTABILITY, NON -INFRINGEMENT OR FITNESS FOR A PARTICULAR PURPOSE.
H. NOTIFICATION OF WARRANTY CLAIM
All claims filed under the Warranty provided In Section G shall be made in writing by the Customer within thirty ( 30) calendar days of idengfying a defect Customer shall provide the written notice of the calm to Utility Service Co., Inc. pursuant to Section A above, and the Customer shall provide the following information in the written notice: ( i) a description of the defect giving rise to the claim; (ii) photographs showing the defect; and ( iii) if the claim is related to Equipment, the serial number( s) of the Equipment which is ( are) the subject or the claim.
I. EXCLUSIONS FROM WARRANTY
Occurrence of any of the following, as reasonably determined by Utility Service Co., Inc., will void the Warranty: ( i) unauthorized alteration of any components) of the Services or the Equipment, ti applicable, originally supplied by Utgity Service Co., Inc., or ( ti) intentional or negligent damage to Utility Service Co., Inc.' s work product or the Equipment, if applicable to this Proposal, caused by any other person or entity, including but not limited to, the Customer and its officers, employees, agents, contractors, and assigns.
J. VERIFICATION OF WARRANTY CLAIM
Utility Service Co., Inc. shall contact Customer following its receipt of notice of a claim under the Warranty. Utility Service Co., Inc. reserves the right to request additional information from the Customer or to conduct an on -site inspection of its work or the Equipment, if applicable to this Proposal, before accepting a claim. The Parties agree to cooperate and work in good faith to provide any additional information needed or to schedule an on - site visit by Utility Service Co., Inc.' s personnel to visibly inspect the work and the Equipment, if applicable. Furthermore, Utility Service Co., Inc. reserves the right to have a third party participate in the inspection of the work to verify whether the work or Equipment, if applicable, is defective under the terms of the Warranty. 2025 Utility Service Co., Inc. CONFIDENTIAL Page 4
142
Docusign Envelope ID: 840898AF- 40A-967- 90A3- BF198B534920
USG WATER
SOLUTIONS -
Proposal from
UTILITY SERVICE CO., INC.
535 Gen. Courtney Hodges Blvd • P O Box 1350 • Perry, GA 31069 Toll -free: 855- 526- 4413 I Fax: 478- 97- 2991
usgwater. com
Exhibit B — Terms and Conditions ( Continued)
K. SATISFACTION OF WARRANTY CLAIM
If 'Ally SeMce Co., kha verifies, in good faith, that a claim under the Warranty is veld and not subject to an exclusion pursuant to Section I above, Utiity Service Co., Inc. agrees b repair areplace, widaut expense to the Customer, any workmanship, matelots, and/ or Equipment, if applicable, flnNshed hereunder that may { rove defective within the Warranty Period. The Warranty provided in this Proposal shall be the sole end exclusive remedy of the Customer.
L. INDEMNIFICATION
Utiiy SeMce Co. Inc. shat indemnify and hold hamless Custaner from e1 claims for physical damage to third party properly or dory to persons, including death, to the extent mused by the negligence of Utility Service Co., Inc. a its dicers, agents, employees, and/ or assigns whtie engaged in activities under this Proposal. Customer shall likewise indemnify and hold harmless LIMN SeMce Co., Inc. from all dabs for physical damage to third party property or injury to persons, inducingg death, to the extent caused by negdgence of the Customer or its dicers, agents, employees, and/ or assigns. kt the event such damage or injury is caused by }pint or concurrent negligence of Utility Service Co., Inc. and Customer, the loss shall be borne by each Party in proportion to its negligence. For the purpose of this Section L, (i) 'Third party' shal not Include Customer or any subsequent owner of the property where the Services were performed or Equipment, if applicable, their shtostddaries, parents, affiliates, agents, successors or assigns including any operation or maintenance conbacta, or their insurer; and (1I) no portion of the Equipment is ' third party Properly
M. FORCE MAJEURE
Utility Service Co., Inc. shall not be liable to the Customer for non- performance a delay in performance of any of Its obligations under this Proposal due to: (i) acts of God ( which include, but are not Funded to, tropical storms, hurricanes, tornadoes, and earthquakes), ( ii) failure of the Internet or another network, (iii) war, (iv) riot, (v) civil commotion, ( vi) embargo, (vii) labor disputes, (vli) labor strikes, (ix) fire, (x) flood, (d) theft (hdO epidemic, hen) pandemic (inducing COVID- 19), ( xiv) delay in delivery of services, materials, or equipment by subconbactas, suppliers, a manufacturers, (xv) shortage of labor or materials, or ( xvl) any other unforeseen event ( whether or not similar in nature to those specified) outside the reasonable control of Utility Service Co., Inc.
N. LIMITATION OF LIABILITY
Neither the Customer nor Utility SeMce Co., Inc. shall be liable to the other for any economic ( including, without Imitation, loss of revenues, profits, contracts, business or anticipated savings), special, indirect, incidental, exemplary, punitive or consequential tosses or damages or loss of goodwill in any way whether such liability is based on tort, contract, negligence, strict liability, product liability or otherwise arising from or relating to this Proposal or resulting from the use or the inability to use the Services or Equipment, if applicable to this Proposal, or the performance or non- perfonnan a of the Services or Equipment, if applicable. II is the responsibility of the Customer to insure itself in this regard if it so desires. The liability time of Utility SeMce Co., Inc. and its affiliate companies under this Proposal, whether based in contract, warranty, tort ( including negligence), strict liability, product liability or otherwise shall not exceed the price that the Customer agrees to pay Utility Service Co., Inc. in this Proposal.
O. GOVERNING LAW AND DISPUTE
RESOLUTION
This Proposal and these Tens shall be construed in accordance with the laws of the state of Georgia without regad to the conflict of law prindple. In the event of a dispute concerning this Proposal, the complaining Party shad notify the other Party in writing thereof. Management level representatives of both Parties shall meet at an agreed location and attempt to resolve the dispute in good faith. Should the dispute not be resolved within sixty ( 60) days after such notice, the complaining Party shall seek remedies exdusNeiy through arbitration. The seat of arbitration shall be the federal district court closest to the location where the Services were performed or are scheduled to be performed, and the rules of arbitration will be the Ccmmerdal Arbitration Rules of American Arbitration Association, which are incorporated herein by reference into this Section O.
2025 Utility Service Co., Inc. CONFIDENTIAL Page 5
143
PAGE LEFT
INTENTIONALLY
BLANK
144
ITEM 4. 8
CITY MANAGER' SREPORT
OCTOBER 13, 2025 CITY COUNCIL REGULAR MEETING
ITEM: ADOPT IWRMP AMENDMENTS TO THE WATER,
WASTEWATER AND RECYCLED WATER MASTER
PLANS ( PW 22- 19 AND WW 22-4) AND CEQA
DETERMINATION
RECOMMENDATION: Adopt Resolution to Approve the Integrated Water Resources Master Plan Amendments to the Water,
Wastewater and Recycled Water Master Plans ( PW
22- 19 and WW 22-4), and to Approve an Addendum
to the City of Lathrop Integrated Water Resources
Master Plan Environmental Impact Report in
Accordance with CEQA Guidelines Sections 15162
and 15164
SUMMARY:
The Integrated Water Resources Master Plan ( IWRMP) Amendments associated with CIPs PW 22- 19 and WW 22-4, provide a comprehensive update to the City' s water, wastewater and recycled water system master plan documents, which were originally adopted in 2019. Implementation of the IWRMP Amendments is a discretionary project for the City and is therefore subject to environmental review under the California Environmental Quality Act ( CEQA).
Staff request Council adopt a resolution approving the City of Lathrop IWRMP Amendments to the water, wastewater and recycled water master plans and approve an Addendum to the City of Lathrop IWRMP Environmental Impact Report ( EIR), in accordance with CEQA Guidelines Sections 15162 and 15164.
BACKGROUND:
The IWRMP Amendments update water and sewer demand projections and address changes in regulatory requirements, population and growth forecasts, land use planning, climate change, and other evolving conditions. The original IWRMP and its EIR were prepared by EKI and De Novo and approved by City Council in December 2019.
Since then, several developments have necessitated updates. These include revised water demand factors and projections, completed in July 2020 to support the River Islands Phase 2 development Water Supply Assessment; and the City obtaining a National Pollutant Discharge Elimination System ( NPDES) permit, allowing surface water discharge from the City' s
Consolidated Treatment Facility ( CTF). The updates
also include the decommissioning of ponds and spray fields previously used for CTF effluent disposal.
145
CITY MANAGER' S REPORT PAGE 2
OCTOBER 13, 2025 CITY COUNCIL REGULAR MEETING
ADOPT IWRMP AMENDMENTS TO THE WATER, WASTWATER AND RECYCLED WATER MASTER PLANS ( PW 22- 19 AND WW 22-4) AND CEQA
DETERMINATION
On April 11, 2022, the City Council approved an agreement with EKI to update the IWRMP. Amendment No. 1 to this agreement was approved by staff in August 2022 to reallocate the scope of work toward evaluating wastewater strength sent to the Manteca Water Quality Control Facility ( MWQCF), in lieu of flow monitoring. On February 13, 2023, Council approved Amendment No. 2 to update geodatabases for the water, sewer and recycled water systems.
On August 12, 2024, the City Council approved an agreement with EKI for additional services needed to complete the IWRMP Amendments, including updates to the City' s planned expansion of the recycled water system. The City Council also approved an agreement with DeNovo to perform the CEQA analysis.
CEQA REVIEW:
As a discretionary project, the IWRMP Amendments require compliance with the California Environmental Quality Act ( CEQA) prior to formal adoption.
To consider an amendment to the IWRMP, the City must ensure that environmental review consistent with CEQA and the State CEQA Guidelines has been completed.
Because the City previously complied with CEQA for the IWRMP, and the current discretionary action involves changes to an already - approved project, the City may rely on the certified Environmental Impact Report ( EIR) previously prepared for the IWRMP, to the extent it remains adequate. Pursuant to CEQA Guidelines Section 15162, the City must, determine whether any changed circumstances or new information of substantial importance trigger the need for a subsequent EIR.
CEQA Guidelines Section 15164 provides that a lead agency shall prepare an addendum to a previously certified EIR if some changes or additions are necessary, but none of the conditions outlined in Section 15162 have occurred. A subsequent EIR is only required if substantial evidence in the record demonstrates that one or more of the following conditions apply:
1) Substantial changes are proposed in the project that would require major revisions to the previous EIR or negative declaration due to the involvement of new significant environmental effects or a substantial increase in the severity of previously identified significant effects;
2) Substantial changes occur with respect to the circumstances under which the project is undertaken, requiring major revisions to the previous EIR or negative declaration due to the involvement of new significant environmental effects or a substantial increase in the severity of previously identified effects; or 3) New information of substantial importance, which was not known and could not have been known with the exercise of reasonable diligence at the time the previous EIR was certified as complete or the negative declaration was adopted, shows any of the following:
146
CITY MANAGER' S REPORT PAGE 3
OCTOBER 13, 2025 CITY COUNCIL REGULAR MEETING
ADOPT IWRMP AMENDMENTS TO THE WATER, WASTWATER AND RECYCLED WATER MASTER PLANS ( PW 22- 19 AND WW 22- 24) AND CEQA
DETERMINATION
A) The project will have one or more significant effects not discussed in the previous EIR or negative declaration;
B) Significant effects previously examined will be substantially more severe than shown in the previous EIR;
C) Mitigation measures or alternatives previously found infeasible would, in fact, be feasible and would substantially reduce one or more significant effects of the project, but the project proponents decline to adopt the mitigation measure or alternative; or
D) Mitigation measures or alternatives considerably different from those analyzed in the previous EIR would substantially reduce one or more significant effects on the environment, but the project proponents decline to adopt the mitigation measure or alternative.
If any of the above conditions are met, the City must prepare a subsequent EIR, unless only minor additions or changes would be needed to make the previous EIR adequately apply to the modified project. In such cases, a supplement to an EIR would be appropriate under CEQA Guidelines, Section 15163. If none of the conditions requiring a subsequent or supplemental EIR are met, the City may prepare an addendum under Section 15164. An addendum explains why some changes or additions to the certified EIR are necessary, but none of the conditions described in Section 15162 have occurred.
As demonstrated in the environmental analysis provided in Section 4 ( Environmental Analysis), the proposed changes do not meet the criteria for subsequent EIR or negative declaration. An addendum is appropriate here because, as explained in Section 4, none of the conditions requiring a subsequent EIR or negative declaration have occurred.
As detailed in the EIR Addendum, the revisions in the IWRMP Amendments do not alter the environmental conclusions presented in the EIR, which found impacts to be either less significant or less than significant with mitigation.
RECOMMENDATION:
Staff recommend that the City Council consider all submitted information and public testimony and, if deemed appropriate, adopt a Resolution approving the City of Lathrop Integrated Water Resources Master Plan ( IWRMP) Amendments to the water, wastewater, and recycled water master plans, and approving an Addendum to the IWRMP Environmental Impact Report ( EIR) in accordance with CEQA Guidelines Sections 15162 and 15164.
147
CITY MANAGER' S REPORT PAGE 4
OCTOBER 13, 2025 CITY COUNCIL REGULAR MEETING
ADOPT IWRMP AMENDMENTS TO THE WATER, WASTWATER AND RECYCLED WATER MASTER PLANS ( PW 22- 19 AND WW 22-4) AND CEQA
DETERMINATION
FISCAL IMPACT:
There is no direct fiscal impact associated with the recommended action. The IWRMP will support Capital Improvement Planning ( CIP), budgeting, and rate studies for water, wastewater and recycled water projects.
ATTACHMENTS:
A. Resolution to Approve the Integrated Water Resources Master Plan Amendments to the Water, Sewer and Recycled Water Master Plans PW 22- 19 and WW 22-4 and to Approve an Addendum to the City of Lathrop Integrated Water Resources Master Plan Environmental Impact Report in accordance with CEQA Guidelines Sections 15162 and 15164
B. Addendum to the City of Lathrop Integrated Water Resources Master Plan Amendments Environmental Impact Report ( SCH # 2019029106), August 2025
C. 2024 Water Master Plan Amendment, December 2024
D. 2024 Wastewater System Master Plan Amendment, December 2024 E. 2025 Recycled Water System Master Plan Amendment, May 2025 148
CITY MANAGER' S REPORT PAGE 5
OCTOBER 13, 2025 CITY COUNCIL REGULAR MEETING
ADOPT IWRMP AMENDMENTS TO THE WATER, WASTWATER AND RECYCLED WATER MASTER PLANS ( PW 22- 19 AND WW 22- 24) AND CEQA
DETERMINATION
APPROVALS:
Greg bson Date
Senior Civil Engineer
BradQfaylor
City Engineer
1/ I6/ 74)
Date
Ito• Zoz. s'
Michael King Date
Assistant City Manager
Salvador Navarrete
City Attorney
Date
to • Z - Z.
Stephen J. Salvatore Date
City Manager
149
RESOLUTION NO. 25 -
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF LATHROP APPROVE
THE INTEGRATED WATER RESOURCES MASTER PLAN AMENDMENTS TO THE WATER, WASTEWATER AND RECYCLED WATER MASTER PLANS ( PW 22- 19 AND WW 22- 24), AND TO APPROVE AN ADDENDUM TO THE CITY OF
LATHROP INTEGRATED WATER RESOURCES MASTER PLAN
ENVIRONMENTAL IMPACT REPORT IN ACCORDANCE WITH CEQA
GUIDELINES SECTIONS 15162 AND 15164
WHEREAS, the Integrated Water Resources Master Plan ( IWRMP) Amendments associated with CIPs PW 22- 19 and WW 22-4, provide a comprehensive update to the City' s water, wastewater and recycled water system master plan documents that were originally adopted in 2019; and WHEREAS, the IWRMP Amendments update water and sewer demand projections and address changes in regulatory requirements, population and growth forecasts, land use planning, climate change, and other evolving conditions; and WHEREAS, previously, EKI and De Novo assisted the City with preparation of the IWRMP and associated project Environmental Impact Report which were approved by Council in December 2019; and
WHEREAS, since then, several developments have necessitated updates.
These include revised water demand factors and projections, completed in July 2020 to support the River Islands Phase 2 development Water Supply Assessment; and the City obtaining a National Pollutant Discharge Elimination System ( NPDES) permit, allowing surface water discharge from the City' s Consolidated Treatment
Facility ( CTF). The updates also include the decommissioning of ponds and spray fields previously used for CTF effluent disposal; and
WHEREAS, on April 11, 2022, Council approved an agreement with EKI to update the IWRMP. Amendment No. 1 to this agreement was approved by staff in August 2022 for EKI to evaluate the strength of wastewater sent to the Manteca Water Quality Control Facility in lieu of a task for wastewater flow monitoring; and WHEREAS, on February 13, 2023, Council approved Amendment No. 2 with EKI to update the geodatabases for the water, sewer and recycled water systems.
On August 12, 2024, Council approved an agreement with EKI for additional services needed to complete the IWRMP Amendments including changes in the City' s planned expansion of the recycled water system and an agreement with DeNovo to perform the CEQA analysis; and
WHEREAS, On August 12, 2024 Council approved an agreement with EKI for additional services needed to complete the IWRMP Amendments including changes in the City' s planned expansion of the recycled water system and an agreement with DeNovo to perform the CEQA analysis; and
150
WHEREAS, implementation of the IWRMP Amendments is a discretionary project for the City and are therefore subject to environmental review under CEQA; and
WHEREAS, the completion of CEQA is required prior to formal adoption of the IWRMP Amendments by the City; and
WHEREAS, De Novo has completed the CEQA analysis and an Environmental Addendum, to provide analysis of the water and sewer master plan components of the IWRMP Amendments PW 22- 19 and WW 22- 24; and
WHEREAS, as detailed in the EIR Addendum the revisions in the IWRMP Addendum do not change the environmental conclusions of less than significant, or less significant with mitigation that was provided in the certified EIR.
NOW, THEREFORE, BE IT RESOLVED that the City Council of the City of Lathrop, hereby approves the proposed Integrated Water Resources Master Plan Amendments to be used to support the General Plan and as the basis for regulatory compliance documents, to support utility operations, budget, rate studies, land use planning and development fees; and
NOW THEREFORE, BE IT FURTHER RESOLVED that the City Council of the City of Lathrop, hereby approves the proposed Addendum to the City of Lathrop Integrated Water Resources Master Plan Environmental Impact Report ( EIR) in accordance with CEQA Guidelines Sections 15162 and 15164. 151
The foregoing resolution was passed and adopted this 13th day of October 2025, by the following vote of the City Council, to wit:
AYES:
NOES:
ABSTAIN:
ABSENT:
Paul Akinjo, Mayor
ATTEST: APPROVED AS TO FORM:
Teresa Vargas, City Clerk Salvador Navarrete, City Attorney 152
A Land Use Planaiflg, Design, and En
153
ADDENDUM
TO THE
CITY OF LATHROP INTEGRATED WATER RESOURCES MASTER PLAN
ENVIRONMENTAL IMPACT REPORT ( EIR)
SCH # 2019029106)
AUGUST 2025
Prepared for:
City of Lathrop
Planning Division
390 Towne Centre Drive
Lathrop, CA 95330
Prepared by:
De Novo Planning Group
1020 Suncast Lane, Suite 106
El Dorado Hills, CA 95762
916) 997- 1865
154
EIR Addendum
1. INTRODUCTION
This Addendum was prepared in accordance with the California Environmental Quality Act ( CEQA) and the CEQA Guidelines. This document has been prepared to serve as an Addendum to the previously certified Environmental Impact Report ( EIR) (State Clearinghouse [ SCH] # 2019029106) for the Lathrop Integrated Water Resources Master Plan ( Original Project). The City of Lathrop is the lead agency for the proposed amendments to the IWRMP, which consists of updates to the Water System Master Plan ( WSMP), the Wastewater System Master Plan ( WWSMP), and the Recycled Water System Master Plan ( RWSMP) (hereafter proposed Project).
For the City to consider an amendment to the IWRMP, the City must ensure that, if needed, environmental review consistent with the requirements of the California Environmental Quality Act CEQA) and the State CEQA Guidelines has been completed. Because the City has previously complied with CEQA for the IWRMP project and the new discretionary action before the City would be a change in an already -approved project, the City can rely on information in the certified EIR previously prepared for the IWRMP, to the extent they remain adequate. Consistent with the requirements of CEQA Guidelines Section 15162, the City must, therefore, determine whether any changed circumstances or " new information of substantial importance" will trigger the need for a subsequent EIR.
As described in CEQA Guidelines Section 15164, a lead agency shall prepare an addendum to a previously adopted EIR if some changes or additions to an EIR certified for a project are necessary, but none of the of conditions identified in CEQA Guidelines Section 15162 have occurred. No subsequent EIR shall be prepared for that project unless the lead agency determines, based on substantial evidence in the light of the whole record, one or more of the following conditions to be applicable:
1) Substantial changes are proposed in the project which will require major revisions of the previous EIR or negative declaration due to the involvement of new significant environmental effects or a substantial increase in the severity of previously identified significant effects; 2) Substantial changes occur with respect to the circumstances under which the project is undertaken which will require major revisions of the previous EIR or negative declaration due to the involvement of new significant environmental effects or a substantial increase in the severity of previously identified significant effects; or 3) New information of substantial importance, which was not known and could not have been known with the exercise of reasonable diligence at the time the previous EIR was certified as complete or the negative declaration was adopted, shows any of the following:
A) The project will have one or more significant effects not discussed in the previous EIR or negative declaration;
Addendum to the City of Lathrop Integrated Water Resources Master Plan EIR 1 155
EIR Addendum
B) Significant effects previously examined will be substantially more severe than shown in the previous EIR;
C) Mitigation measures or alternatives previously found not to be feasible would in fact be feasible and would substantially reduce one or more significant effects of the project, but the project proponents decline to adopt the mitigation measure or alternative; or D) Mitigation measures or alternatives which are considerably different from those analyzed in the previous EIR would substantially reduce one or more significant effects on the environment, but the project proponents decline to adopt the mitigation measure or alternative.
If any of the triggers set forth above occurs, the City would be required to prepare a subsequent EIR, unless " only minor additions or changes would be necessary to make the previous EIR adequately apply to the project in the changed situation," in which case a " supplement to an EIR" would suffice see CEQA Guidelines, Section 15163). If there are no grounds for either a subsequent EIR or a supplement to an EIR, then the City must prepare an addendum pursuant to CEQA Guidelines Section 15164, explaining why " some changes or additions" to the 2019 IWRMP EIR " are necessary but none of the conditions described in Section 15162 calling for preparation of a subsequent EIR have occurred."
As demonstrated in the environmental analysis provided in Section 4 ( Environmental Analysis), the proposed changes do not meet the criteria for preparing a subsequent EIR or negative declaration.
An addendum is appropriate here because, as explained in Section 4, none of the conditions calling for preparation of a subsequent EIR or negative declaration have occurred.
Information and technical analyses from the IWRMP EIR are utilized throughout this Addendum.
Relevant passages from this document ( consisting of the IWRMP EIR) are cited and available for review at:
City of Lathrop — City HaII
390 Towne Centre Drive
Lathrop, CA 95330
https:// www. ci. lathrop. ca. us/ community- development/ page/ communitv- developmentdocuments 2 Addendum to the City of Lathrop Integrated Water Resources Master Plan EIR 156
EIR Addendum
2. BACKGROUND AND PURPOSE OF THE EIR ADDENDUM
The City' s 2019 IWRMP, which includes the City' sWater System Master Plan,' Wastewater System Master Plan,' and Recycled Water Master Plan,' was finalized and approved by the City Council in December 2019 after a California Environmental Quality Act ( CEQA) process. The Lathrop Integrated Water Resources Master Plan EIR was certified by the Lathrop City Council in December 2019. The Project site is generally contiguous with the City limits, and includes the Sharpe Army Depot and the Rail Cargo Container Yard.
ORIGINAL PROJECT
The Original Project consisted of adoption and implementation of the IWRMP, which included the improvement projects summarized in the Water System Master Plan ( 2019), Wastewater System Master Plan ( 2019), and Recycled Water System Master Plan ( 2019).
WATER SYSTEM MASTER PLAN
The Water System Master Plan focused on development of water demand unit factors and projections, hydraulic assessment of the City' s existing water infrastructure and key planned improvements, and development of recommended water system capital improvement projects CIPs). Recommended CIPs were developed to support the City' s water supply strategy and address the deficiencies identified in the hydraulic assessment. A project was developed to address each identified fire flow capacity deficiency, either by replacing existing mains, installing new mains, or replacing undersized hydrants. Additional projects were developed to improve transmission of supply sources within the City' s distribution system.
WASTEWATER SYSTEM MASTER PLAN
The Wastewater System Master Plan focused on development of wastewater flow unit factors and projections, hydraulic assessment of the City' s existing infrastructure and key planned conveyances, and development of recommended wastewater CIPs.
Recommended CIPs were developed to address the potential deficiencies identified in the hydraulic assessment. For each identified gravity sewer capacity deficiency, a project was developed to remove and replace the existing pipe with a larger diameter pipe. Existing pipe slopes and depths were preserved when upsizing sewers in -place. Proposed increases in pipe diameters were optimized to meet the applicable criteria, while preventing oversizing and resulting low velocities during dry weather conditions. Improvements were also identified to address the potential deficiency at the City' s pump stations, including construction of parallel force mains and/ or pump EKI, 2019. Wastewater System Master Plan, City of Lathrop Integrated Water Resources Master Plan Update, final December 2019.
EKI, 2019. Water System Master Plan, City of Lathrop Integrated Water Resources Master Plan Update, final December 2019.
EKI, 2019. Recycled Water System Master Plan, City of Lathrop Integrated Water Resources Master Plan Update, final December 2019.
Addendum to the City of Lathrop Integrated Water Resources Master Plan EIR 3 157
EIR Addendum
upgrades. The WWSMP also suggested installation of permanent flow meter and flow monitoring programs in the Historic Lathrop and Crossroads areas.
RECYCLED WATER SYSTEM MASTER PLAN
The Recycled Water System Master Plan focuses on an evaluation of recycled water use and disposal alternatives, recycled water balance analyses, hydraulic assessment of the City' s existing recycled infrastructure and key planned improvements, and development of recommended recycled water system improvements and operational recommendations.
The City' srecycled water system supports the disposal of the effluent produced by the City -owned Lathrop Consolidated Treatment Facility ( CTF). The RWSMP evaluated the expansion of its recycled water distribution system to meet disposal requirements for the Phase 2 expansion of the Lathrop CTF, and increase from 1. 0 million gallons per day ( MGD) to 2. 5 MGD. It was assumed that the Phase 2 recycled water system expansion would be completed in two phases: Phases 2A and 2B. For expansion of permitted recycled water uses in Phase 2B, the RWSMP implemented a series for improvements including increasing capacity of PMP- 1, installing two ponds, and constructing a pump station.
APPROVALS
As part of the Original Project, the City undertook the following actions:
Certified the Integrated Water Resources Master Plan EIR; Adopted the Mitigation Monitoring and Reporting Program for the project; and Approved the Integrated Water Resources Master Plan.
3. PROPOSED PROJECT
The City' s 2019 IWRMP, which includes the City' s
Water System Master Plan, 4 Wastewater System
Master Plan,' and Recycled Water Master Plan,' was finalized and approved by the City Council in December 2019 after a California Environmental Quality Act ( CEQA) process. Since the IWRMP was completed, new information has become available and certain planning assumptions have changed that require an amendment to the IWRMP, including the following:
Land Use Information: The City completed a General Plan Update in September 2022 which included updated growth projections for the City.' In addition, development projections 4 EKI, 2019. Wastewater System Master Plan, City of Lathrop Integrated Water Resources Master Plan Update, final December 2019.
EKI, 2019. Water System Master Plan, City of Lathrop Integrated Water Resources Master Plan Update, final December 2019. 6 EKI, 2019. Recycled Water System Master Plan, City of Lathrop Integrated Water Resources Master Plan Update, final December 2019.
City of Lathrop, 2022. City of Lathrop General Plan, August 2022. Available: https:// lathrop. generalplan. org/. 4 Addendum to the City of Lathrop Integrated Water Resources Master Plan EIR 158
EIR Addendum
have changed significantly in the River Islands planning area with approval of the modified River Islands Phase 2 project in June 2021 and in the Central Lathrop Specific Plan area.' Water Demand Factors and Projections: The City' s unit water demand factors and water demand projections were updated in July 2020 to support the River Islands Phase 2 development Water Supply Assessment, which were later incorporated into the City' s 2020 Urban Water Management Plan ( UWMP). 9 The updated demand evaluation was based on the City' s water use patterns observed since the 2014-017 drought, which are significantly lower compared to those included in the 2019 IWRMP which had been based on the City' s pre -drought water patterns.
Water Supply Information: The City' s water supply reliability and water supply infrastructure investments need to be reassessed based on the updated water supply projections presented in the 2020 UWMP and any subsequent management efforts. For example, the City' s imported surface water from the South County Water Supply Project SCWSP) could experience significant cutbacks in light of the Bay Delta Plan Amendment and the resolution of the resultant settlement negotiations. Future, the City has experience water quality issues with its groundwater supply associated with the nearby former Occidental Chemical Corporation remediation site and detections of per- and polyfluoroalkyl substances ( PFAS). These issues limit the City' s ability to expand groundwater production in the future. The City conducted engineering feasibility studies for adding PFAS treatment of the Louise Avenue Water Treatment Facility ( LAWTF) and an aquifer storage and recovery ( ASR) project to improve water supply reliability.
River Discharge Permit: The City has obtained a National Pollutant Discharge Elimination System ( NPDES) permit to dispose a portion of the wastewater treated at the Lathrop Consolidated Treatment Facility ( CTF) in the San Joaquin River, with the remaining portioned delivered as recycled water to City owned parks and landscaping as well as retail customers.
To support use of recycled water for landscape irrigation, the City obtained coverage under General Order WQ- 2019- 0058- DDW- R5017 and submitted a Title 22 Report Addendum in 2020. The City began delivering recycled water for urban uses in the summer of 2021. These changes reduce the City' s potable water demand, and affect the operations and infrastructure needed of the City' swastewater effluent disposal and recycled water distribution systems.
WATER SYSTEM MASTER PLAN AMENDMENT
For this project, a comprehensive update of the water system hydraulic model was undertaken to reflect various system improvements and planned expansions. The model was updated to include system improvements completed since the 2019 Water System Master Plan ( WSMP), as well as ongoing projects such as system expansions due to new developments and capital improvement projects by the City. Additionally, the backbone water system infrastructure was updated to account e
9 City
project.
EKI,
of
2021.
Lathrop,
2020
2022.
Urban
River
Water
Islands
Management
Phase 2 Project.
Plan for
Available:
the City of
https:// www. ci. lathrop. ca. us/ planning/ page/ river- islandsphase- 2 Lathrop, June 2021. Available:
https:// www. ci. lath rop. ca. us/ publicworks/ page/ urba n -water - management -plan.
Addendum to the City of Lathrop Integrated Water Resources Master Plan EIR 5 159
EIR Addendum
for future development areas, incorporating recent utility plans from both the City and developers, including specific plans like the River Islands Phase 2 and Mossdale Landing West Tentative Map.
To ensure the accuracy of the model, operational settings for pumps and tanks were verified with input from City operations staff, and adjustments were made where necessary. The water demand factors were updated based on water use data from 2017 to 2021, and parcel -by -parcel average day demands were reallocated to reflect new developments added since the previous update.
Projections for future water demand were developed based on the land projections from the General Plan Update ( adopted in September 2022) and the River Islands Phase 2 project ( approved in June 2021).
The evaluation of water supply reliability included analysis based on the 2020 Urban Water Management Plan ( UWMP) and the City' s PFAS treatment and Aquifer Storage and Recovery ( ASR) feasibility studies. Fire flow demands were assigned to each new fire hydrant, taking into account associated land uses. The water system' s performance under both existing ( 2022) and buildout 2045) conditions was assessed through steady- state model simulations, evaluating system pressures, velocity, head loss deficiencies, and fire flow coverage. The evaluation also extended to storage and booster pump station capacities. Furthermore, the list of capital improvement projects CIPs) from the 2019 WSMP was verified and updated. Finally, the findings and updates were compiled into an amended WSMP document for review and future planning purposes.
SYSTEM IMPROVEMENTS
Since 2019, several major water system improvements have been completed. These completed projects were considered for the WSMP amendment.
BPSs 5 and 6 and Storage Tanks: BPS 5 and 6 and associated storage tanks ( 1. 2 MG and 1. 6 MG, respectively) were constructed in 2018 and 2019 to provide additional storage and flow capacity to the new development at River Islands and Central Lathrop Phase 1 ( Stanford Crossing).
BPS 5 and Tank 5 Site Expansion: The Tank 5 site expansion project, including construction of an additional fire pump of 4, 000 gpm design flow and two new 1. 8 MG water storage tanks ( Tank 5B and Tank 5C) is near completion during the preparation of this master plan.
SSJID Turnout 2: SSJID Turnout 2 was constructed in 2018 with three 2, 000 gpm pumps and one 1. 0 MG tank owned by SSJID.
J Street Improvement Project: The previous 8" to 10" pipes on J St between approximately 140 feet west of Avon St and approximately 210 feet east of 5th St were replaced by new 12" PVC pipe. The previous 10" line on Avon St between J St and Sunflower Dr was replaced by new 12" PVC pipe. The previous 12" BPS -1 discharge line was replaced by new 16" PVC pipe.
South Harlan Road Improvement Project: A new 8" pipe on South Harlan Road, north of Louise Avenue, was constructed to loop the existing 8 -inch dead- end on South Harlan Road to the 8 -inch pipe on Old Harlan Road.
6 Addendum to the City of Lathrop Integrated Water Resources Master Plan EIR 160
EIR Addendum
River Islands Water Infrastructure: Water system improvements for Phases 1, 2A, and parts of 2B of the River Islands Development.
Central Lathrop Stanford Crossing Infrastructure: Water system improvements for the Central Lathrop Stanford Crossing development.
Louise Avenue Water Transmission Main Project: A new 12 - inch transmission line was installed in parallel to the existing 12 -inch transmission line along Louise Avenue from I-5 to Howland Road.
South Lathrop Offsite Backbone Infrastructure: A new 12 - inch transmission line was constructed on Yosemite Avenue between Highway 120 and D' Arcy Parkway.
Backbone Infrastructure, South Lathrop Commerce Center: A new 12 -inch transmission loop was constructed around the South Lathrop Commerce Center.
Murphy Parkway Off -Site Civil Improvement: A new 10 -inch transmission line was constructed on the new development ( Tesla Service Distribution Center) at 17100 Murphy Pkwy, Lathrop, CA 95330.
POPULATION GROWTH
The City anticipates that population will continue to grow in the future given the existing entitlements for several large residential developments. The population projections for 2025 through 2045, summarized in Table 1, are estimated using the existing population and adding the amount of new housing anticipated to be permitted in each five- year increment based on anticipated growth in the service area. The anticipated population in 2045 is now less than the population anticipated in the 2019 WSMP.
Table 1. Current and Projected Service Area Population
Current and Projected Service Area Population
Year 2016 2020 2023 2025 2030 2035 2040
2045
Buildout)
2019 WSMP 22, 174 32,95 46,34 58, 653 67, 844 74, 581 93, 485 2024 WSMP 35, 080 40, 531 55, 471 72, 513 84,97 86, 013 Difference 5, 903 3, 182 4, 669 10, 316 7, 472
Sources:
EKI, 2019. Water System Master Plan, City of Lathrop Integrated Water Resources Master Plan Update, final December 2019.
EKI, 2024. 2024 Water System Master Plan Amendment, December.
DEMANDS
The City' stotal potable water use was 5, 277 acre- feet (AF) in 2022, with a per capita water use of 149 gallons per capita per day ( GPCD). Water demand rebounded from the recent 2014-017 as water use restrictions were lifted and new development projects were constructed. However, water use decreased again as a result of the 2021-022 drought and remains below 2020 levels.
Addendum to the City of Lathrop Integrated Water Resources Master Plan EIR 7 161
EIR Addendum
The City' s water demand factors presented in the 2020 UWMP were verified and updated using 2017 through 2022 data. The water demand factors serve as the basis to estimate average annual water demands for future developments. The updated water demand factors in gallons per day per dwelling unit ( gpd/ du) or gallons per day per acre ( gpd/ ac) are presented in Table 2. In all land use categories except Commercial, the water demand is less than that anticipated in the 2019 WSMP.
Table 2. Water Demand Factors
Land Use Category
2019 WSMP Potable Water Use
Factors
2024 WSMP Updated Potable
Water Use Factors
City- wide City- wide River Islands
Low Density Residential 430 gpd/ du 330 gpd/ du 315 gpd/ du Medium Density Residential 330 gpd/ du 250 gpd/ du 235 gpd/ du High Density Residential 265 gpd/ du 170 gpd/ du
Commercial 1, 300 gpd/ ac 1, 550 gpd/ ac
Industrial 1, 400 gpd/ ac 1, 200 gpd/ ac
Parks / Public Landscaping 3, 500 gpd/ ac 2, 450 gpd/ ac Schools / Institutional 2, 100 gpd/ ac 1, 250 gpd/ ac
Sources:
EKI, 2019. Water System Master Plan, City of Lathrop Integrated Water Resources Master Plan Update, final December 2019.
EKI, 2024. 2024 Water System Master Plan Amendment, December.
Water demand projections were updated and calculated as the sum of (1) the City' s existing potable water demand in 2022, and ( 2) the anticipated potable water demands associated with the future development projects and planning areas post 2022. It is anticipated that the City' stotal demand in 2045 will be 12, 405 acre- feet per year ( AFY), which is significantly lower than the demand projections included in the 2019 WSMP ( 18, 977 AFY).
WATER SYSTEM SUPPLIES
The City obtains water from both imported surface water and local groundwater sources. The City receives Stanislaus River water through SCWSP that is operated by SSJID. The City currently operates five groundwater production wells and a groundwater treatment facility — the LAWTF.
Due to the relatively high cost of SCWSP water, the City has historically relied upon its groundwater wells as the primary source of supply. The City' s annual water production increased from 4, 168 AF in 2017 to 5, 277 AF in 2022 as a result of development growth and rebound from the 2014-017 drought. Surface water production ( i.e., SCWSP purchases) steadily increased from 921 AF in 2017 to 3, 866 AF in 2022. At the same time, the City reduced its groundwater production from 3, 247 AF or 78% of its total supplies in 2017 to 1, 411 AF or 27% in 2022 due to groundwater quality concerns.
The City is evaluating treatment options to meet upcoming regulations for per- and polyfluoroalkyl substances ( PFAS) and an Aquifer Storage and Recovery ( ASR) project to boost its water supply reliability. With future groundwater treatment and purchase of SCWSP Phase II, the City has adequate supplies through 2045 during normal and dry years, as shown in Table 3, Table 4, and Table 5.
8 Addendum to the City of Lathrop Integrated Water Resources Master Plan EIR 162
EIR Addendum
Table 3. Projected Potable Supply vs. Demand for Normal Year Scenario Estimated Supply and Demand (AFY)
2025 2030 2035 2040 2045
Projected Potable Water Demand 6, 128 8, 099 9, 782 11, 083 12, 405 Projected Supply - Current Sources 11, 607 11, 607 11, 607 11, 607 11, 607 Surplus or Deficit
Percent Shortfall
5, 479 3, 508 1, 825 524 798
6%
Projected Supply - Current and Future 12,07 12,07 12,07 15, 981 15, 981 Surplus or Deficit
Percent Shortfall
5, 979 4, 008 2, 325 4, 898 3, 576
Source:
EKI, 2024. 2024 Water System Master Plan Amendment, December. Table 5- 10.
Table 4. Projected Potable Supply vs. Demand for Single Dry Year Scenario Estimated Supply and Demand (AFY)
2025 2030 2035 2040 2045
Projected Potable Water Demand 6, 128 8, 099 9, 782 11, 083 12, 405 Projected Supply - Current Sources 10, 498 11, 048 11, 597 10,07 10, 505 Surplus or Deficit
Percent Shortfall
4, 370 2, 949 1, 815 976
9%
1, 901
15%
Projected Supply - Current and Future 10, 998 11, 548 12, 097 13, 637 14, 259 Surplus or Deficit
Percent Shortfall
4, 870 3, 449 2, 315 2, 554 1, 854
Source:
EKI, 2024. 2024 Water System Master Plan Amendment, December. Table 5- 11.
Table 5. Projected Supply vs. Demand for Multiple Dry Years Scenario Estimated Supply and Demand ( AFY)
2025 2030 2035 2040 2045
First Dry Year
Projected Potable Water Demand 6, 128 8, 099 9, 782 11, 083 12, 405 Projected Supply - Current Sources 11, 607 11, 607 11, 607 11, 607 11, 607 Surplus or Deficit
Percent Shortfall
5, 479 3, 508 1, 825 524 798
6%
Projected Supply - Current and Future 12,07 12,07 12,07 15, 981 15, 981 Surplus or Deficit
Percent Shortfall
5, 979 4, 008 2, 325 4, 898 3, 576
Second Dry Year
Projected Potable Water Demand 6, 128 8, 099 9, 782 11, 083 12, 405 Addendum to the City of Lathrop Integrated Water Resources Master Plan EIR 9 163
EIR Addendum
Estimated Supply and Demand ( AFY)
2025 2030 2035 2040 2045
Projected Supply - Current Sources 11, 607 11, 607 11, 607 11, 607 11, 607 Surplus or Deficit
Percent Shortfall
5, 479 3, 508 1, 825 524 798
6%
Projected Supply - Current and Future 12,07 12,07 12,07 15, 981 15, 981 Surplus or Deficit
Percent Shortfall
5, 979 4, 008 2, 325 4, 898 3, 576
Third Dry Year
Projected Potable Water Demand 6, 128 8, 099 9, 782 11, 083 12, 405 Projected Supply - Current Sources 10, 498 11, 048 11, 597 10,07 10, 505 Surplus or Deficit
Percent Shortfall
4, 370 2, 949 1, 815 976
9%
1, 901
15%
Projected Supply - Current and Future 1Q998 11, 548 12, 097 13, 637 14, 259 Surplus or Deficit
Percent Shortfall
4, 870 3, 449 2, 315 2, 554 1, 854
Fourth Dry Year
Projected Potable Water Demand 6, 128 8, 099 9, 782 11, 083 12, 405 Projected Supply - Current Sources 10, 498 11, 048 11, 597 10,07 10, 505 Surplus or Deficit
Percent Shortfall
4, 370 2, 949 1, 815 976
9%
1, 901
15%
Projected Supply - Current and Future 10, 998 11, 548 12, 097 13, 637 14, 259 Surplus or Deficit
Percent Shortfall
4, 870 3, 449 2, 315 2, 554 1, 854
Fifth Dry Year
Projected Potable Water Demand 6, 128 8, 099 9, 782 11, 083 12, 405 Projected Supply - Current Sources 11, 607 11, 607 11, 607 11, 607 11, 607 Surplus or Deficit
Percent Shortfall
5, 479 3, 508 1, 825 524 798
6%
Projected Supply - Current and Future
12,07 12,07 12,07 15, 981 15, 981
Surplus or Deficit
Percent Shortfall
5, 979 4, 008 2, 325 4, 898 3, 576
Source:
EKI, 2024. 2024 Water System Master Plan Amendment, December. Table 5- 12. 10 Addendum to the City of Lathrop Integrated Water Resources Master Plan EIR 164
EIR Addendum
HYDRAULIC ASSESSMENT
The water system hydraulic model was updated to represent the City' s utility infrastructure as of January 2023. The hydraulic model, along with the updated demand projections, was used to evaluate capacity needs for current and future demand conditions and to complete the hydraulic assessment portion of the WSMP. The updated model was validated by comparing the model results to system operations data.
Existing infrastructure and key planned infrastructure were assessed under an Existing ( 2022) scenario and a Buildout ( 2045) scenario.
The City' s water distribution system is primarily assessed against its ability to supply required pressures under peak demand and fire flow conditions. Pipe velocity and head loss criteria are secondary criteria that indicate which pipes could be upsized to increase downstream pressures and improve water movement within the system. Due to the updated water demand projections, no new hydraulic deficiencies are identified compared to the 2019 WSMP.
SUPPLY, STORAGE, AND PUMPING CAPACITY ASSESSMENT
The City currently has adequate supply, storage, and peaking pumping capacity to meet design criteria. Additional supply, storage, and peak pumping capacity will be required to support future development, as shown in Table 6.
Table 6. Projected Citywide Pumping Requirements
Available or Required Capacity( a)
Existing Buildout
gpm mgd gpm mgd
Available
Pumping
Capacity
SSJIDTurnout 1 5, 210 7. 5 5, 210 7. 5
LAWTF Booster Station 6, 300 9. 1 6, 300 9. 1
BPS - 1 1, 050 1. 5 1, 050 1. 5
BPS - 2 3, 000 4. 3 3, 000 4. 3
BPS - 3 4, 750 6. 8 4, 750 6. 8
BPS -4 4, 600 6. 4, 600 6.
BPS -5(') 8, 000 11. 5 12, 000 17. 3
BPS -6 5, 300 7. 6 5, 300 7. 6
Planned BPS at the former Well 21 site 3, 000 4. 3
Planned River Islands Phase II BPS 8, 000 11. 5
Total Available Firm Pumping Capacity 38, 210 55. 0 53, 210 76. 6 Criteria 1: Max
Day Plus Fire
Flow
MDD Plus Two Concurrent Fires(`) 11, 562 16. 6 19, 075 27. 5 Max Day Plus Two Concurrent Fires Pumping
Capacity Surplus 26, 648 38. 4 34, 135 49. 2
Criteria 2: Peak
Hour Demands
PHD 8, 506 12. 2 19, 996 28. 8
Peak Hour Demand Pumping Capacity 29, 704 42. 8 33, 214 47. 8 Pumping Capacity Surplus r(Deficit) el 26, 648 38. 4 33, 214 47. 8 Addendum to the City of Lathrop Integrated Water Resources Master Plan EIR 11 165
EIR Addendum
Notes:
a) Firm pumping capacity reflects the capacity of the pumping station with the largest domestic pump offline. b) Firm pumping capacity at buildout from City of Lathrop Phase I Potable Water Booster Pump station and Storage Tank Expansion Plan at River Islands 100% Plans ( PACE, 2022).
c) Value is equal to the MDD plus the fire flow criteria for one high density residential fire ( 2, 000 gpm) and one industrial fire ( 4, 000 gpm)•
d) Total pumping capacity surplus or deficit reflects the most stringent criteria. Deficits will be made up by future booster pump stations. e) SSJID Turnout 2 was designed to pump directly to Tank 5 or BPS -5 therefore it' s not accounted for in the total pumping capacity.
Source: EKI, 2024. 2024 Water System Master Plan Amendment, December. Table 8-7.
RECOMMENDED CAPITAL IMPROVEMENT PROGRAM CHANGES
The WSMP recommends modifications to the list of Capital Improvement Projects ( CIPs) included in the 2019 WSMP and the City' s CIP. The following improvements were identified:
Modifications to Water Supply CIPs
o Groundwater Treatment Improvements
o Aquifer Storage and Recovery
Modification to Water Distribution System CIPs
o Harlan Road and South Harlan Road Fire Flow Improvement Project o Murphy Parkway Fire Flow Loop to Harlan Road
o East J Street Alley Residential Fire Flow Improvement Project o Lathrop Transmission Main Improvement Project
WASTEWATER SYSTEM MASTER PLAN AMENDMENT
The WWSMP amendment includes a comprehensive update of the wastewater system hydraulic model to reflect improvements completed since the 2019 WWSMP, as well as ongoing projects currently under design or construction. The amendment includes a review of the City' s basic assumptions and criteria for wastewater planning, including system design, pump station operations, and infiltration and inflow rates. Additionally, the wastewater flow unit factors would be updated based on data collected from 2017 to 2021, which reflect both wastewater flow and water usage patterns.
Wastewater generation projections have been developed using land use data consistent with the General Plan Update ( adopted in September 2022) and the River Islands Phase 2 project ( approved in June 2021). The peaking curve would be verified and updated to accurately evaluate peak wet - weather flows. The updated flow projections would then be assessed against the wastewater treatment capacity to ensure the system' s adequacy to handle future demand. The existing collection system would also be evaluated under both current and future flow conditions through steady- state model simulations.
Further analysis focused on pump stations, force mains, and alternative conveyance methods to optimize the system' sperformance. The list of Capital Improvement Programs ( CIPs) from the 2019 WWSMP was verified and updated, ensuring that all improvements are accounted for. Finally, the 12 Addendum to the City of Lathrop Integrated Water Resources Master Plan EIR 166
EIR Addendum
findings and updates from these analyses were compiled into an amended WWSMP document to guide future planning and improvements.
UPDATED DEVELOPMENT PROJECTIONS
The City has experienced significant growth in recent years and is anticipating growth to continue, as shown in Table 7, particularly in several approved or pending large development projects within the City. Infrastructure needs for these projects are evaluated in the WWSMP. The development areas considered for buildout projections are:
Central Lathrop Specific Plan
Mossdale Landing
Mossdale Landing East
Mossdale Landing South
Mossdale Landing West
River Islands
Lathrop Gateway Business Park Specific Plan
South Lathrop Specific Plan
Historic Lathrop Infill and Other Developments East of I-5 Sharpe Army Depot
Table 7. Current and Projected City of Lathrop Population Current and Projected Service Area Population ( a)( b)
Year 2023 2025 2030 2035 2040
2045
Buildout)
Population Served 35, 080 40, 531 55, 471 72, 513 84,97 86, 013 Notes:
a) Current population is based on population estimates by the California DOF for the City of Lathrop included in DOF, 2023.
b) Projected populations for 2025 through buildout ( 2045) are based on residential unit counts from Table 2- 1 of the WWSMP, multiplied by 4. 02 persons per dwelling unit for low density developments ( U. S. Census, 2023) and
3. 0 persons per dwelling unit for medium and high density developments.
Source: EKI, 2024. 2024 Wastewater System Master Plan Amendment, December. Table 2-3.
CITY' SEXISTING WASTEWATER INFRASTRUCTURE
Wastewater from the City is treated at two facilities: (1) the Lathrop Consolidated Treatment Facility Lathrop CTF, or LCTF), and (2) the Manteca Wastewater Quality Control Facility ( MWQCF). The City' s allocated capacity at the MWQCF is 1. 451 million gallons per day (MGD) of dry weather flow per the City' s 2002 Agreement Amendment with Manteca. The Lathrop CTF has a treatment capacity of 2. 5 MGD. The City is currently planning a Phase 3 Expansion that will expand CTF' scapacity to a total of
5. 0 MGD.
Addendum to the City of Lathrop Integrated Water Resources Master Plan EIR 13 167
EIR Addendum
The City' s wastewater collection system consists of approximately 102 miles of gravity mains, 23. 6 miles of force mains, as well as 15 lift stations and pump stations. The City has a Supervisory Control and Data Acquisition ( SCADA) system for control and monitoring of facilities.
EXISTING AND FUTURE WASTEWATER GENERATION
In 2022, the City generated a total average annual flow ( AAF) of 2. 17 MGD, including 1.1 MGD treated at the MWQCF ( 51%) and 1. 06 MGD treated at the CTF (49%). The City' s average dry weather flow ( ADWF) was essentially equal to its AAF between 2017 and 2022, indicating minimal rainfall - induced infiltration and inflow ( I&). The total per capita ADWF is approximately 70 gallons of wastewater per capita per day.
Land use -specific wastewater generation factors were updated using the 2017 through 2022 historic wastewater flow and parcel -level water use data. The wastewater generation factors serve as the basis to estimate ADWF for future developments. The IWRMP updated wastewater generation factors ( in units of gallons per day per dwelling unit or gallons per day per acre; gpd/ du or gpd/ ac) are presented in Table 8.
Table 8. Wastewater Flow Factors
Wastewater Flow Factor
City -Wide River Islands
Low Density Residential 240 gpd/ du 200 gpd/ du
Medium Density Residential 200 gpd/ du 155 gpd/ du
Medium Density Residential 110 gpd/ ac
Commercial 755 gpd/ ac
Industrial 240 gpd/ ac
Parks 55 gpd/ ac
Schools/ Institutional 220 gpd/ ac
Source: EKI, 2024. 2024 Wastewater System Master Plan Amendment, December. Table ES - 1.
Wastewater ADWF projections were calculated as the sum of the two major components of future wastewater flow: (1) the volume of wastewater that best represents existing wastewater generation within the City, and ( 2) the anticipated wastewater generation associated with the future development projects and planning areas.
The City' s projected wastewater generation by sector and by development area are estimated in five- year increments between 2025 and buildout in 2045. It is anticipated that the City' stotal ADWF at buildout in 2045 is estimated to be 5. 67 MGD, which is 12. 5% lower than the projections included in the 2019 WWSMP of 6. 48 MGD. An ADWF of L36 MGD is anticipated to flow to MWQCF from Historic Lathrop and 4. 31 MGD is projected to flow to the Lathrop CTF at buildout. The vast majority of the projected increase in wastewater generation at the CTF above current rates is associated with new development in River Islands and Central Lathrop.
14 Addendum to the City of Lathrop Integrated Water Resources Master Plan EIR 168
EIR Addendum
WASTEWATER TREATMENT CAPACITY ASSESSMENT
The City' s allocation at the MWQCF is sufficient to meet the projected wastewater flows to MWQCF at buildout ( Table 9). Flows to the CTF is anticipated to exceed the current CTF capacity between 2030 and 2035. As shown in Table 10, flows to the Lathrop CTF is anticipated to exceed the current CTF capacity of 2. 5 MGD between 2030 and 2035. The City anticipates completing the Lathrop CTF Phase 3 Expansion within the next three years to meet the projected wastewater flows. The Phase 3 Expansion will expand the CTF' s capacity to a total of 5. 0 MGD, which is sufficient to meet projected flows through buildout.
Table 9. Projected Wastewater Flow and Treatment Capacity at MWQCF Estimated ADWF Influent and Treatment Capacity ( MGD)
Existing
2022)
2025 2030 2035 2040 2045
Projected Influent ADWF (a)
ADWF Projection 1.1 1. 22 1. 28 1. 30 1. 30 1. 31
MWQCF Capacity
Allocated Capacity ( b) 1. 451 1. 451 1. 451 1. 451 1. 451 1. 451 Projected Deficit
Notes:
a) Wastewater influent to MWQCF is the wastewater flow from the Historic Lathrop area and Sharpe Army Depot. b) The City of Manteca indicated that increases in influent wastewater nutrient concentrations reduce MWQCF' streatment capacity and Lathrop' sshare of MWQCF' scapacity to 0. 935 MGD ( see Section 5. 2 of the WWSMP). The City is assessing the information provided by Manteca and whether the City will participate in improvements at the MWQCF to increase the City' s share of capacity.
Source: EKI, 2024. 2024 Wastewater System Master Plan Amendment, December. Table 5-1.
Addendum to the City of Lathrop Integrated Water Resources Master Plan EIR 15 169
EIR Addendum
Table 10. Projected Wastewater Flow and Treatment Capacity at Lathrop CTF Estimated ADWF Influent and Treatment Capacity ( MGD)
Existing
2022)
2025 2030 2035 2040 2045
Projected Influent ADWF ( a)
ADWF Projection 1. 08 1. 51 2. 44 3.7 4. 03 4. 31
Existing Capacity and Future Expansions
Lathrop CTF Phase 0 - 2 ( b) 2. 50 2. 50 2. 50 2. 50 2. 50 2. 50 Lathrop CTF Phase 3 0.0 0.0 2. 50 2. 50 2. 50 2. 50
Total Capacity 2. 50 2. 50 5. 00 5. 00 5. 00 5. 00
Projected Deficit
Notes:
a) Wastewater influent to Lathrop CTF is the combination of wastewater flow from all city areas except for the Historic Lathrop area and Sharpe Army Depot.
b) Higher influent wastewater nutrient concentrations recently observed at the CTF may limit its hydraulic capacity to approximately 2. 0 MGD ( see Section 55. 2of the WWSMP).
Source: EKI, 2024. 2024 Wastewater System Master Plan Amendment, December. Table 5-2.
Both the MWQCF and the Lathrop CTF are observing increasing wastewater strength ( i.e., concentration of pollutants and nutrients in wastewater) likely due to improved water use efficiency during the recent droughts and in response to state regulations. According to capacity studies conducted by the City of Manteca, the City' s share of treatment capacity at the MWQCF is reduced to 0. 935 MGD because of the increased wastewater strength. The City has requested additional information from Manteca and assessing its rights to capacity at the MWQCF. An analysis performed by PACE Engineers ( PACE) in 2021 suggested that higher pollutant loading in CTF influent reduces CTF' s hydraulic capacity to approximately 2. 0 MGD.
HYDRAULIC ASSESSMENT
As part of the WWSMP Amendment, the sewer system hydraulic model was updated to represent the City' sutility infrastructure as ofJanuary 2023. The hydraulic model was used to assess the ability of the City' s existing infrastructure to support the wastewater flow projections summarized in Section 4 of the WWSMP. Existing infrastructure was assessed under two scenarios: Existing ( 2022) and Buildout ( 2045).
The City' scollection system was primarily assessed against the capacity criteria, including depth to diameter ( d/ D) ratio in gravity mains and maximum velocity in force mains. Model results have shown that approximately 3% of City' s existing gravity mains will not meet the capacity criteria by 2045. Most capacity deficiencies identified in the Buildout scenario already exist in the existing system, although the degree of deficiency may increase with projected development ( Table 11). 16 Addendum to the City of Lathrop Integrated Water Resources Master Plan EIR 170
EIR Addendum
Table 11. Summary of Collection System Capacity Deficiencies Scenario
Percent Length of Gravity Mains
Meeting
Capacity
Criteria
d/ D Ratio
Greater
Than 0. 5
a)
d/ D Ratio
Greater
Than 0. 75
d/ D Ratio
Greater Than 1
Surcharged)
Existing 98% 1.4% 0.1% 0.2%
Buildout 97% 2.0% 0.2% 0.3%
Notes:
a) Gravity mains less than 18 -inch diameter and exceeding the capacity criteria.
Source: EKI, 2024. 2024 Wastewater System Master Plan Amendment, December. Table 7-2.
Pump stations are evaluated against the ability to convey peak wet weather flow ( PWWF) within a station' sfirm capacity. A capacity deficiency has been identified in the Stonebridge Lift Station ( LS) in both the Existing and Buildout scenario ( Table 12). All other pump stations are projected to have sufficient capacities to meet existing and future PWWFs.
Table 12. Summary of Hydraulic Capacity Analysis for Pump Stations Pump Station
Existing
Firm
Capacity
gpm)
Existing Scenario Buildout
Firm
Capacity
gpm) (b)
Buildout Scenario
PWWF
gpm)
TDH
ft)
PWWF
gpm)
TDH
ft)
MWQCF Collection System
North Harlan PS 1, 075 53 11. 4 117 21.
Stonebridge LS 350 390 47. 5 390 43. 0
Woodfield LS 820 744 47. 5 752 50. 2
Valley Crossing LS ( c) 83 27 47. 5 27 50. 2
J Street LS 700 584 27. 8 651 28. 1
Easy Court LS 500 223 37. 9 227 65. 1
O Street PS 2, 800 915 27. 8 994 28. 1
McKinley Avenue PS 1, 675 971 34. 1 984 35. 5
Lathrop CTF Collection System
Stanford Crossing PS 2, 300 194 37. 9 1, 049 65. 1
Mossdale PS 4, 050 989 43. 2 3, 450 1, 328 58. 9
River Islands 2A PS 3, 975 437 19. 4 2, 018 19. 9
River Islands Main PS ( e) 1, 700 884 37. 9 15, 000 3, 785 65. 1 Lathrop Gateway PS 280 126 13. 5 155 22.
South Lathrop PS 1, 850 1 27. 8 94 28. 1
Addendum to the City of Lathrop Integrated Water Resources Master Plan EIR 17 171
EIR Addendum
Notes:
a) Bolded text indicates PWWF exceeded pump station' s firm capacity. b) If different from existing firm capacity.
C) Capacity of the 8" outlet is listed as the lift station capacity, as it is the capacity limiting component of this pump station. d) Flow information is not available for the Louise Avenue PS, therefore, its capacity is not analyzed. e) It is anticipated that the River Islands Sewer PS will be constructed in phases to include a total of six pumps.
Source: EKI, 2024. 2024 Wastewater System Master Plan Amendment, December. Table 7-4.
The City' s existing and planned force mains are able to convey projected wastewater flow through 2045.
RECOMMENDED CAPITAL IMPROVEMENT PROGRAM
The recommended collection system capital improvement projects ( CIPs) from the 2019 WWMP have been reviewed and confirmed to address the potential deficiencies identified in the updated hydraulic assessment. The WWSMP Amendment recommends additional analyses be conducted to confirm the required project extents and infrastructure sizing. Modifications and additions were made to treatment projects based on findings from the wastewater treatment capacity assessment.
The WWSMP Amendment recommends modifications and additions to the list of recommended CIPs included in the 2019 WWSMP. The following modifications to the City' s wastewater treatment
CIPs are identified to reflect recent wastewater strength at MWQCF and the City' s progression on CTF expansions.
Manteca Interim Improvements
The City of Manteca indicated that increases in influent wastewater nutrient concentrations reduce MWQCF' streatment capacity to 6. 36 MGD and, therefore, Lathrop' sshare of MWQCF' scapacity to
0. 935 MGD. The City' s ADWF conveyed to the MWQCF was 1.1 MGD in 2022 and was above this estimated reduced allocation. Moreover, the City anticipates a total of 1. 31 MGD of wastewater will flow to MWQCF at buildout.
The City of Manteca is planning interim improvement projects which would increase the MWQCF' s capacity to 8. 23 MGD and Lathrop' sshare of capacity to 1. 21 MGD. The cost estimate of interim improvement projects to MWQCF was estimated at a total 32. 8 million in the August 2022 letter and updated to 79. 6 million in Manteca' s 2023 draft Wastewater Master Plan ( Manteca, 2022; 2023).
The draft Manteca Wastewater Master Plan additionally evaluated a Phase IV Expansion Project that would further increase MWQCF' scapacity from 8. 23 MGD to 17. 5 MGD to serve projected population growth in its service area. The recommended Phase IV Expansion Project includes two
4. 65 MGD stages, with the cost of Stage 1 estimated at $ 146. 3 million and Stage 2 at $ 70. 6 million. 18 Addendum to the City of Lathrop Integrated Water Resources Master Plan EIR 172
EIR Addendum
The City is currently assessing its appropriate level of contribution to improvements at the MWQCF to meet its current and buildout wastewater treatment needs. It is anticipated that the City will identify such improvements as a CIP once an agreement is established.
Lathrop CTF Phase 3 Expansion
The current Phase 2 expansion Lathrop CTF has a hydraulic capacity of 2. 5 MGD at elevated wastewater strength levels. As discussed in Section 5.2, wastewater ADWF to the Lathrop CTF is projected to soon exceed this capacity before 2025. The City has initiated Phase 3 expansion of the facility to a total ADWF capacity of 5. 0 MGD. The total projected OPC for the Phase 3 expansion is approximately $23. 7 million based on the City' s FY 2023-4 CIP plan ( WW 22- 38).
The Phase 3 expansion is projected to meet flows from the new development areas through 2040, until when the City may need a fourth expansion of the facility.
Modification to Collection System CIPs
The hydraulic evaluation in the WWSMP Amendment showed a reduction in hydraulic deficiency locations compared to those presented in the 2019 WWSMP as a result of CIPs completed since the 2019 WWSMP and lower wastewater flow projections. In particular, (1) the Woodfield Pump Station upgrade was completed in 2019; and ( 2) the Crossroads gravity main replacement project is no longer necessary. As such, these projects are removed or modified from the list of recommended CIPs.
The remaining collection system CIPs from the 2019 WWSMP have been reviewed and have been retained to address the potential deficiencies identified in the hydraulic assessment. However, the findings in the WWSMP Amendment recommend additional analysis be conducted to confirm the required project extents and sizing.
RECYCLED WATER SYSTEM MASTER PLAN AMENDMENT
The RWSMP amendment includes a comprehensive update to the recycled water system hydraulic model network to incorporate system improvements completed since the 2019 RWSMP. The amendment takes into consideration the backbone infrastructure in the future recycled water system hydraulic model network based on utility plans completed by City or individual land developers as development projects were approved. Existing recycled water landscape irrigation areas were identified, and the future uses of recycled water evaluated and used to create demand projections. Based on the existing usage of recycled water and the demand for recycled water in the future, the amendment reevaluated the City' s conclusions regarding recycled water planning including design criteria, balance analyses, and pump station operations. Based on future demands for recycled water and steady- state model simulations, the RWSMP amendment provides an operation strategy resulting in river discharge. Specific capital improvements to the recycled water system are identified to optimize the City' s distribution system at buildout with implementation of river discharge. Finally, the findings and updates were compiled into an amended RWSMP document for review and future planning purposes.
Addendum to the City of Lathrop Integrated Water Resources Master Plan EIR 19 173
EIR Addendum
CITY' SEXISTING RECYCLED WATER INFRASTRUCTURE
The City' srecycled water system was originally built to support the disposal of the effluent produced by the City -owned Lathrop Consolidated Treatment Facility ( CTF) via agricultural land application areas ( LAAs) and use of recycled water for urban landscape irrigation ( LI). The land use required for LAAs and the necessary seasonal storage ponds limited the potential development areas within the City. Thus, the City obtained a National Pollutant Discharge Elimination System ( NPDES) permit 2021 to discharge effluent to the San Joaquin River to eliminate the need for LAAs and large storage ponds. The City has been discharging CTF effluent to the San Joaquin River since February 2024 and plans to remove the land application areas, storage ponds, and selected pump stations to optimize the system for a smaller amount of recycled water demands associated with urban landscape irrigation.
The City is currently providing recycled water to 54. 7 acres of landscape irrigation ( LI) areas located primarily in the Central Lathrop and Mossdale development areas. Projected future uses of recycled water will continue to consist of landscape irrigation to a total of 174. 9acres by buildout ( 2045).
River Islands is supplementing its non -potable demand with its own non -potable sources.
RECYCLED WATER SUPPLY AND DEMAND EVALUATION
The City provided a total of 194 acre- feet of recycled water to LI areas in 2022. By its buildout in 2045, the City anticipates a total annual recycled water demand of 2. 4 MGD or 2, 688 acre- feet per year (AFY), which is a significant reduction from demands estimated in prior planning documents due to river discharge of effluent.
The City provided a total of 194 acre- feet of recycled water to LI areas in 2022. Projected recycled water demand is estimated assuming average precipitation and evaporation. The City' s projected annual and maximum month recycled water demand in 5 -year increments through buildout ( 2045) is summarized in Table 13. The City anticipates a total recycled water demand of 2. 38 MGD or 2, 669 acre- feet per year ( AFY) by 2045.
As shown in the water balance evaluations in the RWSMP Amendment, monthly landscape irrigation demands were estimated based on average annual precipitation and evaporation within the City.
The resulting total annual recycled water demand per unit area is equivalent to 48. 7 ac- inch/ ac.
Using the unit area recycled water demand factor, the City anticipates a total recycled water demand of 2. 38 MGD or 2, 669 acre- feet per year ( AFY) by 2045 ( Table 14). The projected demand is well below the projected recycled water supply at 4. 31 by 2045. 20 Addendum to the City of Lathrop Integrated Water Resources Master Plan EIR 174
EIR Addendum
Table 13. Projected Average Annual and Maximum Month Recycled Water Demand Units 2025 2030 2035 2040 2045
Total Annual Demand
ac - inch 11, 592 19, 227 25, 323 32, 032 32, 032
acre- feet 966 1, 602 2, 110 2, 669 2, 669
MGD 0. 86 1. 43 1. 88 2. 38 2. 38
Maximum Month Demand
ac - inch 1, 994 3,07 4, 356 5,10 5,10
MGD 1. 75 2. 90 3. 82 4. 83 4. 83
Source: EKI, 2025. 2025 Recycled Water System Master Plan Amendment, May. Table 4-3.
Table 14. Projected Average Annual Recycled Water Demand by Development Area Development Area
Projected Recycled Water Demand ( acre- feet)
2025 2030 2035 2040 2045
Central Lathrop 146 305 325 445 445
Mossdale 182 217 262 262 262
River Islands 635 1, 078 1, 521 1, 960 1, 960
Lathrop Gateway 0. 81 0. 81 0. 81 0. 81 0. 81
Crossroads 1. 6 1. 6 1. 6 1. 6 1. 6
TOTAL 966 1, 602 2, 110 2, 669 2, 669
Source: EKI, 2025. 2025 Recycled Water System Master Plan Amendment, May. Table 4-.
RECYCLED WATER SYSTEM OPERATION STRATEGY
The City anticipates a smaller amount of recycled water demands associated with urban landscape irrigation and implementation of river discharge. Only 61. 4to 71. 5 MG of seasonal storage is needed to meet the City' sseasonal recycled water demands under 2030 and 2045 conditions, respectively.
This can be met by retaining existing ponds S5 and S16 with a total storage capacity of 129. 5 MG, as summarized in Table 15, and their respective booster pump stations PMP- 1 and PMP- 10 with upgrades.
Addendum to the City of Lathrop Integrated Water Resources Master Plan EIR 21 175
EIR Addendum
Table 15. Existing Storage Pond Characteristics
Pond ID
Assessor' sParcel
Number
Storage Capacity
million gallons) a
Storage Capacity
acre -inches)
S5
198-30- 47
198-30- 48 28 1, 048
S16 213-90- 02 101 3, 719
Note: (a) Storage capacities are rounded to the nearest million gallons.
Source: EKI, 2025. 2025 Recycled Water System Master Plan Amendment, May. Table 5-1.
Pump stations PMP- 1and PMP- 10 will need to be upgraded to expand their capacities to supply peak recycled water demands and continually pressurize the recycled water system. To optimize its recycled water system, it is recommended that the City install pressure reducing valve stations to create two pressure zones, one for River Islands and one for the rest of the City. In addition, new transmission mains are recommended to improve distribution system capacity and support new development.
Pump stations PMP- 10and PMP- 1 will need to be upgraded to supply peak demands and pressurize the recycled water system at the necessary pressures. A significant portion of the City' s buildout recycled water demand will be driven by the River Islands non -potable water system. The City' s recycled water system is planned to connect to River Islands through the existing RI - PS and the future RI Phase 2 PS. Recycled water will be discharged to the wet wells of these pump stations, which will then pump water into River Islands' distribution system. As such, PMP- 10 should be upgraded to meet peak demands at RIPS and RI Phase 2 PS and maintain positive pressures within the City' srecycled water transmission system in River Islands. In addition, PMP- 1 will be upgraded to meet demands and maintain required pressures in areas east of the San Joaquin River.
Due to the high cost of operating and maintaining pump stations and storage ponds, as well as the phased nature of future developments, the RWSMP recommends that the City phase the expansion of the BPSs. This should begin with upgrading and operating the existing PMP- 1, followed by upgrading PMP- 10 when system - wide projected peak demands approach the firm capacity of PMP1.
The recommended buildout recycled system also includes new transmission mains to improve the system' s hydraulic capacity. These new mains are facilities conceptualized previously in backbone infrastructure plans or through discussion with City staff, which are listed below:
Mossdale Landing West development area backbone infrastructure; A New 16 -inch transmission main along River Islands Parkway, Cambay Parkway, and Golden Valley Parkway, connecting the RI Phase 2 PS with the City' s existing 16 -inch main on Golden Valley Parkway near Cirrus Court; and
22 Addendum to the City of Lathrop Integrated Water Resources Master Plan EIR 176
EIR Addendum
A 24 -inch transmission main and railroad crossing that connects PMP- 10 to the new 16 - inch main at the intersection of Cambay Parkway and Golden Valley Parkway.
To optimize the efficiency of PMP- 1 and PMP- 10 when both pump stations are in operation simultaneously, the RWSMP recommends installing pressure reducing valve ( PRV) stations between portions of the River Islands system and the remaining areas of the City' s recycled water system.
This will create two separate pressure zones to improve system performance and reliability. The new PRV stations are intended to maintain appropriate pressure within each zone to meet the City' s design criteria.
The PRVs will be set to remain closed when both PMP- 1and PMP- 10 are operating concurrently, and to open when S16 is being filled or when only one pump station is in operation. Each station will be equipped with two sets of low -flow and high -flow PRVs to allow bidirectional water transfer, along with flow meters to monitor volume flowing in both directions between the City and River Islands.
The RWSMP recommends the following PRV locations and pressure settings to ensure the valves remain closed during peak demand conditions.
PRV- 1: On the existing 16 - inch main along River Islands Parkway between Somerston Parkway and Cohen Road
o From the City to River Islands: 12 psi
o From River Islands to the City: 50 psi
PRV- 2: On the existing 16 -inch main along Manthey Road near the intersection of Manthey Road and Steward Road
o From the City to River Islands: 30 psi
o From River Islands to the City: 45 psi
Additionally, at each connection point between the River Islands' non -potable water system and the City' s recycled water system, pressure sustaining valve ( PSV) stations are recommended to be installed to maintain positive pressure in the City' s system during periods of low demand. A PSV station will also be required at S16' sinflow pipe to sustain the pressure during pond filling periods.
This configuration allows the City to manage flows during peak and non -peak seasons and keep the recycled water system pressurized.
Algae growth within the City' s storage ponds has been impacting distribution and irrigation system equipment. To address this, the City is exploring options to add filtration or other treatment to the recycled water pumped from the ponds. Additionally, with the reduced recycled water demand projections, only a portion of the existing capacity of ponds S5 and S16 is required to meet peak seasonal demands. As a result, the City could consider reducing the capacity of these ponds or partitioning them into smaller cells, provided that the remaining storage is sufficient to meet the estimated required seasonal storage during average rainfall years of 6L4 MG by 2030 and 71. 5 MG Addendum to the City of Lathrop Integrated Water Resources Master Plan EIR 23 177
EIR Addendum
by 2045. Reducing storage capacity could also help improve water quality and repurpose a portion of the parcel for other beneficial uses. Hydraulic Assessment The RWSMP includes an updated recycled water system hydraulic model to assess the recommended optimizations in the near -term and at buildout. Modeling results verify that design criteria are met throughout the system under peak hour demand conditions with the recommended optimizations.
RECOMMENDED CAPITAL IMPROVEMENT PROGRAM
Recommended CIPs were developed to optimize the design of the City' s distribution system at buildout with implementation of river discharge. Planning level opinions of probable costs ( OPCs) are developed based on bid information from recent similar projects in California.
The OPC for construction is presented in December 2024 dollars based on Engineering News Record ENR) Construction Cost Index ( CCI) of 13, 632. 41 (20 -city average). The total CIP OPC also includes allowances equal to 60% for construction contingency ( 30%), design ( 15%), construction management ( 5%), permitting (5%), and project implementation (5%).
Table 16 summarizes the RWSMP- recommended CIPs and the City' s existing CIPs with their estimated planning level OPCs. The estimated OPC totals $ 17. 8 million for City CIP projects.
Table 16. Summary of Recommended Recycled Water System Capital Improvement Projects Project # Improvement Description OPC ( a)
City Projects
RW- 1 Pump Station PMP- 1Upgrade 6, 060,00
RW- 2 Pump Station PMP- 10 Upgrade 10,20, 000
RW- 3 Treatment at Storage Ponds S5 and S16 1, 547, 000 (b) RW- 6 Conversion of Potable Irrigation Areas to Recycled Water TBD ( c) RW- 7 Recycled Water Metering and Billing Improvements TBD ( c) RW- 8 Recycled Water Operations and Permitting ( City RW 23- 02) 69, 915 (d) Total City CIP OPC 17, 797, 000
Developer Funded Projects
RW- 4 River Islands Phase 2 Backbone Main Improvement 17, 880, 000 RW- 5 Pressure Reducing Valve Station Improvement 860, 00 Abbreviations:
CIP = capital improvement projects
OPC = Opinion of Probable Construction Cost
Notes:
a) Detailed costs for RW- 1, RW- 2, RW- 4 and RW- 5 are estimated in following sections and are presented in December 2024 dollars.
b) Costs for RW- 3are based on estimates provided by City staff on 7 February 2025. Projects RW- 6and RW- 7 are recommended to be further refined in the near future.
24 Addendum to the City of Lathrop Integrated Water Resources Master Plan EIR 178
EIR Addendum
C) Costs for RW- 8 was carried over from the City' s Capital Improvement Programs Fiscal Years d) 2023 - 2025 ( Lathrop, 2023).
e) Total may not sum due to rounding.
Source: EKI, 2025. 2025 Recycled Water System Master Plan Amendment, May. Table 8-1
4. ENVIRONMENTAL ANALYSIS
ANALYSIS OF IMPACTS FOUND TO BE LESS THAN SIGNIFICANT
Specific impacts within the following categories of environmental effects were found to be less than significant as set forth in more detail in the certified EIR. Following each bullet is a conclusion on whether the proposed revisions change the impact conclusion found in the original EIR.
Biological Resources: The following specific impacts were found to be less than significant: 3.1- 2, 3. 1-, and 3. 1-4.
o The revisions do not increase the severity of any impact. However, the revisions do not change the environmental conclusion of less than significant that was provided in the certified EIR.
Geology and Soils: The following specific impact was found to be less than significant: 3.-1 o The revisions do not increase the severity of any impact. However, the revisions do not change the environmental conclusion of less than significant that was provided in the certified EIR.
Hazards and Hazardous Materials: The following specific impacts were found to be less than significant: 3. 4-2, 3. 4-, 3. 4-, 3.-5, and 3.-6.
o The revisions do not increase the severity of any impact. However, the revisions do not change the environmental conclusion of less than significant that was provided in the certified EIR.
Hydrology and Water Quality: The following specific impacts were found to be less than significant: 3. 5-2, 3.5-, 3. 5-4, 3. 5-, and 3. 5-6.
o The revisions do not increase the severity of any impact. However, the revisions do not change the environmental conclusion of less than significant that was provided in the certified EIR.
Utilities: The following specific impacts were found to be less than significant: 3. 6-1, 3. 6-2, 3. 6- 3, 3.6-4, 3. 6-5, 3.6-, 3.6-7, and 3.6-8.
Addendum to the City of Lathrop Integrated Water Resources Master Plan EIR 25 179
EIR Addendum
o The revisions do not increase the severity of any impact. However, the revisions do not change the environmental conclusion of less than significant that was provided in the certified EIR.
Analysis of Impacts Found to be Less Than Cumulatively Considerable Specific impacts within the following categories of environmental effects were found to be less than cumulatively considerable contribution as set forth in more detail in the certified EIR. Following each bullet is a conclusion on whether the proposed revision change the impact conclusion found in the original EIR.
Biological Resources: The following specific impact was found to be less than cumulatively considerable: 4. 1.
o The revisions do not increase the severity of any impact. However, the revisions do not change the environmental conclusion of less than significant that was provided in the certified EIR.
Cultural and Tribal Resources: The following specific impact was found to be less than cumulatively considerable: 4. 2.
o The revisions do not increase the severity of any impact. However, the revisions do not change the environmental conclusion of less than significant that was provided in the certified EIR.
Geology and Soils: The following specific impact was found to be less than cumulatively considerable: 4.3.
o The revisions do not increase the severity of any impact. However, the revisions do not change the environmental conclusion of less than significant that was provided in the certified EIR.
Hazards and Hazardous Materials: The following specific impact was found to be less than cumulatively considerable: 4.
o The revisions do not increase the severity of any impact. However, the revisions do not change the environmental conclusion of less than significant that was provided in the certified EIR.
Hydrology and Water Quality: The following specific impacts were found to be less than cumulatively considerable: 4.5, 4.6, 4.7, and 4.8.
o The revisions do not increase the severity of any impact. However, the revisions do not change the environmental conclusion of less than significant that was provided in the certified EIR.
26 Addendum to the City of Lathrop Integrated Water Resources Master Plan EIR 180
EIR Addendum
Utilities: The following specific impacts were found to be less than cumulatively considerable:
4.9, 4. 10, 4. 11, 4. 12, and 4. 13.
o The revisions do not increase the severity of any impact. However, the revisions do not change the environmental conclusion of less than significant that was provided in the certified EIR.
ANALYSIS OF IMPACTS FOUND TO BE LESS THAN SIGNIFICANT WITH
MITIGATION
Specific impacts within the following categories of environmental effects were found to be less than significant with mitigation as set forth in more detail in the certified EIR. Following each bullet is a conclusion on whether the proposed revisions change the impact conclusion found in the original EIR.
Biological Resources
Impact 3. 1-: The proposed Project has the potential to have direct or indirect effects on special - status species. The potential for the Project to have direct or indirect effects on special - status species is discussed on pages 3.1- 23 through 3.1- 28 of the Draft EIR. The following mitigation measure was adopted and will be implemented as provided by the Mitigation Monitoring Program: Mitigation Measure 3.1-. The revisions do not have a net change in impact as it relates to this environmental topic. The revisions do not change the environmental conclusion of less than significant with mitigation that was provided in the certified EIR.
Impact 3.1-5: The proposed Project has the potential to conflict with an adopted Habitat Conservation Plan. The potential for the Project to conflict with an adopted Habitat Conservation Plan is discussed on pages 3. 1-1 through 3.1-2 of the Draft EIR. The following mitigation measure was adopted and will be implemented as provided by the Mitigation Monitoring Program: Mitigation Measure 3. 1-. The revisions do not have a net change in impact as it relates to this environmental topic. The revisions do not change the environmental conclusion of less than significant with mitigation that was provided in the certified EIR.
Cultural and Tribal Resources
Impact 3. 2-1: The proposed Project has the potential to cause a substantial adverse change to a significant historical resource, as defined in CEQA Guidelines § 15064. 5, or a significant tribal cultural resource, as defined in Public Resources Code § 21074. The potential for the Project to cause a substantial adverse change to a significant historical resource is discussed on pages 3. 2- 11 through 3.2- 12 of the Draft EIR. The following mitigation measure was adopted and will be implemented as provided by the Mitigation Monitoring Program: Mitigation Measure 3. 2-1. The revisions do not have a net change in impact as it relates to this Addendum to the City of Lathrop Integrated Water Resources Master Plan EIR 27 181
EIR Addendum
environmental topic. The revisions do not change the environmental conclusion of less than significant with mitigation that was provided in the certified EIR.
Impact 3.2-: The proposed Project has the potential to cause a substantial adverse change to a significant archaeological resource, as defined in CEQA Guidelines § 15064. 5. The potential for the Project to cause a substantial adverse change to a significant archaeological resource is discussed on page 3. 2- 13 of the Draft EIR. The following mitigation measure was adopted and will be implemented as provided by the Mitigation Monitoring Program: Mitigation Measure 3.2-1. The revisions do not have a net change in impact as it relates to this environmental topic. The revisions do not change the environmental conclusion of less than significant with mitigation that was provided in the certified EIR.
Impact 3. 2-: The proposed Project has the potential to directly or indirectly destroy a unique paleontological resource or site or unique geologic feature. The potential for the Project to cause a substantial adverse change to a significant paleontological resource or site or unique geologic feature is discussed on page 3. 2- 13 of the Draft EIR. The following mitigation measure was adopted and will be implemented as provided by the Mitigation Monitoring Program: Mitigation Measure 3. 2-1. The revisions do not have a net change in impact as it relates to this environmental topic. The revisions do not change the environmental conclusion of less than significant with mitigation that was provided in the certified EIR.
Impact 3. 2-4: The proposed Project has the potential to disturb human remains, including those interred outside of formal cemeteries. The potential for the Project to disturb human remains is discussed on page 3.2- 14 of the Draft EIR. The following mitigation measure was adopted and will be implemented as provided by the Mitigation Monitoring Program:
Mitigation Measure 3. 2-. The revisions do not have a net change in impact as it relates to this environmental topic. The revisions do not change the environmental conclusion of less than significant with mitigation that was provided in the certified EIR.
Geology and Soils
Impact 3.-2: The proposed Project may result in substantial soil erosion or the loss of topsoil.
The potential for the Project to result in soil erosion is discussed on pages 3.- 14 through
3.- 17 of the Draft EIR. The following mitigation measure was adopted and will be implemented as provided by the Mitigation Monitoring Program: Mitigation Measure 3.-
1. The revisions do not have a net change in impact as it relates to this environmental topic.
The revisions do not change the environmental conclusion of less than significant with mitigation that was provided in the certified EIR.
Impact 3.-: The proposed Project has the potential to be located on a geologic unit or soil that is unstable, or that would become unstable as a result of project implementation, and potentially result in landslide, lateral spreading, subsidence, liquefaction or collapse. The potential for the Project to be located on an unstable geologic unit such that landslide, lateral spreading, subsidence, liquefaction, or collapse could occur is discussed on pages 3.- 28 Addendum to the City of Lathrop Integrated Water Resources Master Plan EIR 182
EIR Addendum
17 through 3.- 18 of the Draft EIR. The following mitigation measure was adopted and will be implemented as provided by the Mitigation Monitoring Program: Mitigation Measure
3.-2. The revisions do not have a net change in impact as it relates to this environmental topic. The revisions do not change the environmental conclusion of less than significant with mitigation that was provided in the certified EIR.
Impact 3.-4: The proposed Project has the potential to be located on expansive soils which may create substantial risks to life or property. The potential for the Project to be located on expansive soils such that risks to life or property could occur is discussed on page 3.- 19 of the Draft EIR. The following mitigation measure was adopted and will be implemented as provided by the Mitigation Monitoring Program: Mitigation Measure 3.-2. The revisions do not have a net change in impact as it relates to this environmental topic. The revisions do not change the environmental conclusion of less than significant with mitigation that was provided in the certified EIR.
Hazards and Hazardous Materials
Impact 3. 4-1: The proposed Project has the potential to create a significant hazard through the routine transport, use, or disposal of hazardous materials or through the reasonably foreseeable upset and accident conditions involving the release of hazardous materials into the environment. The potential for the Project to create a significant hazard through the release of hazardous materials into the environment is discussed on pages 3.4- 15 through
3.4- 16 of the Draft EIR. The following mitigation measures were adopted and will be implemented as provided by the Mitigation Monitoring Program: Mitigation Measures 3.4- 1 and 3.4-2. The revisions do not have a net change in impact as it relates to this environmental topic. The revisions do not change the environmental conclusion of less than significant with mitigation that was provided in the certified EIR.
Hydrology and Water Quality
Impact 3.5-1: The proposed Project has the potential to violate water quality standards or waste discharge requirements or otherwise substantially degrade surface or ground water quality during construction. The potential for the Project to degrade surface or ground water quality during construction is discussed on pages 3.5- 17 through 3.5- 18 of the Draft EIR. The following mitigation measures were adopted and will be implemented as provided by the Mitigation Monitoring Program: Mitigation Measures 3.-1. The revisions do not have a net change in impact as it relates to this environmental topic. The revisions do not change the environmental conclusion of less than significant with mitigation that was provided in the certified EIR.
IMPACTS FOUND TO BE SIGNIFICANT AND UNAVOIDABLE
There were no impacts in the certified EIR that were found to be significant and unavoidable.
Addendum to the City of Lathrop Integrated Water Resources Master Plan EIR 29 183
EIR Addendum
30 Addendum to the City of Lathrop Integrated Water Resources Master Plan EIR 184
ATTACHMENT C
eki
2024 WATER SYSTEM MASTER PLAN
AMENDMENT
City of Lathrop
December 2024
EKI C20049. 01
environment
water
EKI ENVIRONMENT & WATER, INC. 2001
www. ekiconsult. com
Junipero Serra Blvd, Suite 300 • Daly City, CA 94014
185
ek, environment
water
2024 Water System Master Plan Amendment
City of Lathrop
December 2024
Prepared for:
City of Lathrop
390 Towne Centre Drive
Lathrop, CA 95330
Prepared by:
EKI Environment & Water, Inc.
2001 Junipero Serra Blvd., Suite 300
Daly City, California 94014
650) 292- 9100
www. ekiconsult. com
EKI C20049. 01
Jonathan Sutter, P. E.
Project Manager/ Supervising Engineer
k 0
con
Tina Wang, P. E.
Assistant Project Manager/ Associate Engineer
L4,,-, Acr, 1
Gi- e,...
Yuqing Gao, EIT
Project Engineer
186
2024 Water System Master Plan Amendment
City of Lathrop
TABLE OF CONTENTS
EXECUTIVE SUMMARY ES -1
1 INTRODUCTION 1-
1. Project Background 1-
1. 2 Scope of Work 1-2
1. 3 Report Organization 1- 2
2 STUDY AND WATER SERVICE AREAS 2-1
2. 1 City Limits, Sphere of Influence, and Service Boundaries 2-1
2. Specific Plans and Large Planned Unit Development 2-1
2. 3 Current and Projected Population 2-7
3 EXISTING WATER SYSTEM 3-1
3. 1 Water Supply and Treatment Facilities 3- 1
3. 1. Groundwater Wells, Raw Water Pipelines, and Treatment Facilities 3- 1
3. 1. 2 Surface Water Turnouts 3-1
3. 1. Emergency Interties 3-2
3. 2 Water Distribution System Facilities 3- 5
3. 2. 1 Treated Water Storage Facilities and Booster Pump Stations 3-5
3. 2. Water Distribution Pipelines 3-5
3. 2. SCADA System 3- 5
3. Summary of Major Water System Improvements Since 2019 3- 5 4 EXISTING AND FUTURE WATER DEMANDS 4-1
4. 1 Current and Historical Water Demand 4-1
4. 2 Water Demand Projections 4-8
4. 2. 1 Baseline Potable Water Demand 4-8
4. 2. Demand Associated with Planned Development 4-8
4. 2.3 Total Projected Potable Water Demand 4-8
4. 3 Peak Demands 4- 12
5 WATER SYSTEM SUPPLIES 5-1
5. 1 Imported Surface Water 5- 2
5. 2 Groundwater 5-
5. 3 Total Water Supplies 5-6
5. 4 Water Supply Reliability 5-8
5. 4. 1 Projected Supply Reliability by Source 5-8
5. 4. 2 Projected Supply Reliability by Year Type 5- 13
5. Supply and Demand Assessment 5- 18
5.1 City -Wide Supply and Demand by Year Type 5- 18
5. 6 Recommended Water Supply Strategy 5- 23
5. 6. 1 SSJID SCWSP Phase II 5- 23
eki environment
water
December 2024
EKI C20049. 01
187
2024 WSMP Amendment
City of Lathrop
5. 6.2 Treatment for PFAS 5- 23
5. 6. 3 Aquifer Storage and Recovery 5- 24
6 WATER SYSTEM PERFORMANCE AND OPERATIONS CRITERIA 6- 1
6. 1 Distribution System Performance Criteria 6- 1
6. 1. Peaking Factors 6-1
6. 1. 2 Fire Flows 6-1
6. 1. 3 Water Supply Capacity 6-1
6. 1. 4 Distribution System Pressures 6-2
6. 2 Water Facilities Criteria 6- 7
6. 2. 1 Water Transmission and Distribution Pipeline Sizing Criteria 6-7
6. 2. Booster Pump Stations 6-7
6. 2. 3 Water Storage Capacity 6-8
7 DISTRIBUTION SYSTEM HYDRAULIC CAPACITY EVALUATION 7-1
7. 1 Hydraulic Modeling Approach 7-1
7. 2 Hydraulic Model Update 7-1
7. 2. 1 Model Platform 7-1
7. 2. Model Update 7-1
7. 2.3 Model Validation and Calibration 7-2
7. 3 Modeling Scenarios 7- 2
7. 4 Water Distribution System Performance Evaluation 7-
7. 4.1 Existing System Evaluation 7-
7. 4. 2 Future System Evaluation 7- 12
8 WATER SUPPLY, STORAGE, AND PUMPING CAPACITY EVALUATION 8-1
8. 1 Existing Water System Evaluation 8-1
8. 1. Water Supply Capacity 8- 1
8. 1.2 Water Storage Capacity 8-1
8. 1. 3 Peak Pumping Capacity 8-1
8. 2 Future Water System Evaluation 8-3
8. 2.1 Water Supply Capacity 8-3
8. 2. Water Storage Capacity 8-4
8. 2. 3 Peak Pumping Capacity 8-6
9 RECOMMENDED CAPITAL IMPROVEMENT PROGRAM CHANGES 9-1
9. 1 Modifications to Water Supply CIPs 9-1
9. 1. Groundwater Treatment Improvements 9-1
9. 1. 2 Aquifer Storage and Recovery 9- 1
9. 2 Modification to Water Distribution System CIPs 9- 2
9. 2. 1 Harlan Road and South Harlan Road Fire Flow Improvement Project 9- 2
9. 2. Murphy Parkway Fire Flow Loop to Harlan Road 9- 3
9. 2. 3 East J Street Alley Residential Fire Flow Improvement Project 9- 3
9. 2. 4 Lathrop Transmission Main Improvement Project 9- 3 eki environment
water ii
December 2024
EKI C20049. 01
188
2024 WSMP Amendment
City of Lathrop
10 REFERENCES 10-
TABLES
Table ES - 1. Water Demand Factors ES -2
Table ES -2. Summary of Recommended Water System Capital Improvement Projects ES -7 Table 2-1. City of Lathrop Development Projections by Development Area 2-5 Table 2-. Historical Service Area Population 2- 8
Table 2-3. Current and Projected Service Area Population 2-9 Table 3-1. Active Groundwater Well Information 3-4
Table 3-2. Existing Treated Water Storage Facilities 3-7 Table 3-. Treated Water Storage Facility Booster Pump Station Characteristics 3-8 Table 3-4. Pipeline Lengths by Diameter 3-9
Table 4-1. Current and Historical Potable Water Use and Population 4-3 Table 4-2. Number of Current ( 2022) Potable Water Services by Sector 4-5 Table 4-3. Current and Historical Potable Water Use by Sector 4-6 Table 4-. Updated Water Demand Factors 4-8
Table 4-5. Projected Water Demand by Development Area 4- 10 Table 4-6. Historical Potable Water Peak Demands and Peaking Factors 4- 14 Table 5-1. Current and Historical Potable Water Supply 5-1 Table 5- 2 Lathrop SSJID Turnouts — Basis of Design 5-3 Table 5-3. Groundwater Production Well Capacities and Annual Yields 5-6 Table 5-4. Current and Projected Potable Water Supply Entitlements 5-7 Table 5-. Projected SCWSP Supply Availability 5-9
Table 5-6. Projected SCWSP Supply Available to City of Lathrop 5-9 Table 5-7. Projected Potable Water Supply in Normal Years 5- 14 Table 5-8. Projected Potable Water Supply in Single Dry Years 5- 15 Table 5-9. Projected Potable Water Supply in Multiple Dry Years 5- 16 Table 5- 10. Projected Potable Supply vs. Demand for Normal Year Scenario 5- 19 Table 5- 11. Projected Potable Supply vs. Demand for Single Dry Year Scenario 5- 20 Table 5- 12. Projected Supply vs. Demand for Multiple Dry Years Scenario 5- 21 Table 6-1. Summary of Recommended Potable Water System Performance and Operational Criteria... 6-3 Table 6-2. Required Fire Flow and Storage Requirements 6- 5 Table 7-1. Summary of Water Demands by Scenario 7-5
Table 8-1. Existing Water Supply Capacity 8- 2
Table 8-2. Existing Water Storage Capacity and Requirements 8-2 Table 8-3. Evaluation of Existing Firm Pumping Capacity 8- 3 Table 8-4. Projected Water Supply Capacity 8-4
ekienvironment water iii
December 2024
EKI C20049. 01
189
2024 WSMP Amendment
City of Lathrop
Table 8-5. Projected Storage Requirements by Development Area 8- 5 Table 8-6. Projected Citywide Storage Requirements 8- 5 Table 8-7. Projected Citywide Pumping Requirements 8-6
Table 9-1. Summary of Recommended Water System Capital Improvement Projects 9-4
FIGURES
Figure ES -1. Existing Potable Water System Infrastructure ES -4 Figure ES -2. Modeled Future Water Infrastructure ES -5 Figure ES -3. Recommended Water System Capital Improvement Projects ES - 6 Figure 2-1. City of Lathrop Boundaries and Development Areas 2-4 Figure 2-. Historical and Projected Service Area Population 2-9 Figure 3-1. Existing Water System Infrastructure 3-
Figure 4-1. Current and Historical Potable Water Use and Population 4- Figure 4-2. Current and Historical Per Capita Potable Water Use 4- Figure 4-3. Number of Current Potable Water Services by Sector 4-5 Figure 4-. Annual Water Use by Sector: 2017-022 4-7
Figure 4-5. Percentage of Total Water Use by Sector: 2017-022 4-7 Figure 4-6. City of Lathrop Monthly Water Production 4- 13 Figure 5-1. Current and Historical Potable Water Supply 5-2 Figure 5-2. Water Supply Infrastructure 5-4
Figure 5-3. Current and Projected Potable Water Supply Entitlements 5-7 Figure 5-4. Projected Normal Year Potable Water Supply 5- 14 Figure 5-. Projected Single Dry Year Potable Water Supply 5- 15 Figure 5-6. Projected Multiple Dry Year Potable Water Supply 5- 17 Figure 5-7. Normal Year Potable Supply vs. Demand 5- 19 Figure 5-8. Single Dry Year Potable Supply vs. Demand 5- 20 Figure 5-9. Multiple Dry Year Supply vs. Demand 5- 22
Figure 6-1. Fire Flow Requirement 6-
Figure 7-1. Modeling Scenarios 7-4
Figure 7-2. Modeled Existing and Future Infrastructure 7-6 Figure 7-3. Existing Water System Hydraulic Evaluation — Peak Hour Demand — Pressure 7- 8 Figure 7-4. Existing Water System Hydraulic Evaluation — Peak Hour Demand — Pipe Velocity 7-9 Figure 7-5. Existing Water System Hydraulic Evaluation — Peak Hour Demand — Pipe Head Loss 7- 10 Figure 7-6. Existing Water System Hydraulic Evaluation — Maximum Day Demand — Available Fire Flow . 7- 11 Figure 7-. Buildout Water System Hydraulic Evaluation — Peak Hour Demand — Pressure 7- 13 Figure 7-8. Buildout Water System Hydraulic Evaluation — Peak Hour Demand — Pipe Velocity 7- 14 Figure 7-9. Buildout Water System Hydraulic Evaluation — Peak Hour Demand — Pipe Head Loss 7- 15 eki environment
water iv
December 2024
EKI C20049. 01
190
2024 WSMP Amendment
City of Lathrop
Figure 7- 10. Buildout Water System Hydraulic Evaluation — Maximum Day Demand — Available Fire Flow 7- 16
APPENDICES
Appendix A Water Demand Factor Evaluations
Appendix B Recommended CIP Details
ABBREVIATIONS AND ACRONYMS
AAFES Army & Air Force Exchange Services
ac acres
AC asbestos cement
ACE Altamont Commuter Express
ADD average day demands
AF acre feet
AFY acre feet per year
AOI Area of Interest
ASR Aquifer Storage and Recovery
BBID Byron -Bethany Irrigation District
BCID Banta- Carbona Irrigation District
BPS booster pump station
CCI Construction Cost Index
CEQA California Environmental Quality Act
CII commercial, industrial and institutional
CIP Capital Improvement Program or Capital Improvement Project City City of Lathrop
CLSP Central Lathrop Specific Plan
CTF Consolidated Treatment Facility
DBCP 1, 2- dibromo- 3- chloropropane
Depot Sharp Army Depot
DDW Department of Drinking Water
DGWTP Nick C. DeGroot Water Treatment Plant
DIP ductile iron pipe
DOF California Department of Finance
du dwelling unit
DWR Department of Water Resources
EDB ethylene dibromide
EKI EKI Environment & Water
ENR Engineering News Record
EPA Environmental Protection Agency
FF Fire Flow
fps feet per second
ft feet
ft bgs feet below ground surface
ft/ k-t feet per thousand feet
ekienvironment water v
December 2024
EKI C20049. 01
191
2024 WSMP Amendment
City of Lathrop
FY Fiscal Year
GAC granulated activated carbon
GIS geographic information system
GPCD gallons per capita per day
gpd gallons per day
gpm gallons per minute
GSA Groundwater Sustainability Agency
GSP Groundwater Sustainability Plan
HFPO- DA hexafluoropropylene oxide dimer acid
HI Hazard Index
hp horsepower
I-5 Interstate 5
IWRMP Integrated Water Resources Master Plan
LAWTF Louise Avenue Water Treatment Facility
LF linear feet
LMFD Lathrop Manteca Fire District
MCL Maximum Contaminant Levels
MDD max day demands
MFR multi -family residential
MG Million Gallons
mg/ L milligrams per liter
MGD million gallons per day
MMD maximum month demand
MOU Memorandum of Understanding
MSL mean sea level
NL Notification Level
OCC Occidental Chemical Corporation
OID Oakdale Irrigation District
OPC Opinion of Probable Cost
PFAS per- and polyfluoroalkyl substances
PFBS perfluorobutane sulfonic acid
PFHxS perfluorohexane sulfonic acid
PFNA perfluorononanoic acid
PFOA perfluorooctanoic acid
PFOS perfluorooctanesulfonic acid
PHD peak hour demand
psi Pounds per square inch
PVC polyvinyl chloride
RL Response Level
SB Senate Bill
SCADA Supervisory Control and Data Acquisition
SCWSP South County Water Supply Program
SFR single family residential
SGMA Sustainable Groundwater Management Act
Sharpe Sharpe Army Depot
SOI sphere of influence
SSJID South San Joaquin Irrigation District
SWRCB State Water Resources Control Board
eki environment
water vi
December 2024
EKI C20049. 01
192
2024 WSMP Amendment
City of Lathrop
TDS Total Dissolved Solids
Title 22 California Code of Regulations, Title 22
UCMR Unregulated Contaminant Monitoring Rule
USBR United States Bureau of Reclamation
UWMP Urban Water Management Plan
VFD Variable Frequency Drive
WSMP Water System Master Plan
WTF Water Treatment Facility
eki environment
water vii
December 2024
EKI C20049. 01
193
2024 WSMP Amendment
EXECUTIVE SUMMARY City of Lathrop
EXECUTIVE SUMMARY
EKI Environment & Water, Inc. (EKI) has prepared this Water System Master Plan Amendment ( WSMP Amendment) for the City of Lathrop, California ( City). This WSMP Amendment was developed as part of the 2024 amendment to the City' s Integrated Water Resources Master Plan ( IWRMP Amendment), a comprehensive planning process involving the City' s
Potable Water, Wastewater and Recycled Water
Master Plans. This WSMP Amendment incorporates new information that has become available and changed planning assumptions since the completion of the 2019 IWRMP.
STUDY AND SERVICE AREAS
The City completed a General Plan Update in September 2022 ( Lathrop, 2022a) which included updated growth projections for the City. In addition, development projections have changed significantly in the River Islands area with approval of the modified River Islands Phase 2 project in June 2021 and in the Central Lathrop area.
The current population within the City is approximately 35, 080 as of January 2023 ( California DOF, 2023).
The City has experienced significant growth and anticipates growth to continue in the future given the existing entitlements for several large residential developments.
CITY' SEXISTING WATER INFRASTRUCTURE
As of December 2023, the City' s existing water supply facilities consists of five groundwater wells ( Wells 6, 7, 8, 9, 10), the Louise Avenue Water Treatment Facility ( LAWTF) for treatment of groundwater from Wells 6 through 10, two surface water turnouts for delivery of South County Water Supply Program SCWSP) from the South San Joaquin Irrigation District ( SSJID), and 2. 5 miles of raw water pipelines to deliver untreated well water to the LAWTF. The City' s water distribution system consists of a single pressure zone with seven storage tanks and booster pump stations, and approximately 156 miles of distribution pipelines. Figure ES - 1 shows the City' sservice area and locations of the City' s major water system facilities.
EXISTING AND FUTURE WATER DEMANDS
The City' stotal potable water use was 5, 277 acre- feet (AF) in 2022, with a per capita water use of 149 gallons per capita per day ( GPCD). Water demand rebounded from the recent 2014-017 as water use restrictions were lifted and new development projects were constructed. However, water use decreased again as a result of the 2021-022 drought and remains below 2020 levels.
The City' s water demand factors presented in the 2020 UWMP were verified and updated using 2017 through 2022 data. The water demand factors serve as the basis to estimate average annual water demands for future developments. The updated water demand factors in gallons per day per dwelling unit (gpd/ du) or gallons per day per acre (gpd/ ac) are presented in Table ES -1 below. eki environment
water ES - 1
December 2024
EKI C20049. 01
194
EXECUTIVE SUMMARY
2024 WSMP Amendment
City of Lathrop
Table ES - 1. Water Demand Factors
Land Use Category
Low Density Residential
Updated Potable Water
City- wide
330 gpd/ du
Use Factors ( a)
River Islands
315 gpd/ du
Medium Density Residential 250 gpd/ du 235 gpd/ du
High Density Residential 170 gpd/ du
Commercial 1, 550 gpd/ ac
Industrial 1, 200 gpd/ ac
Parks / Public Landscaping 2, 450 gpd/ ac
Schools / Institutional 1, 250 gpd/ ac
Water demand projections were updated and calculated as the sum of (1) the City' s existing potable water demand in 2022, and ( 2) the anticipated potable water demands associated with the future development projects and planning areas post 2022. It is anticipated that the City' stotal demand in 2045 will be 12, 405 acre- feet per year (AFY), which is significantly lower than the demand projections included in the 2019 WSMP.
WATER SYSTEM SUPPLIES
The City obtains water from both imported surface water and local groundwater sources. The City receives Stanislaus River water through SCWSP that is operated by SSJID. The City currently operates five groundwater production wells and a groundwater treatment facility — the LAWTF.
Due to the relatively high cost of SCWSP water, the City has historically relied upon its groundwater wells as the primary source of supply. However, the City reduced its groundwater production during recent years due to groundwater quality issues. The City is evaluating treatment options to meet upcoming regulations for per- and polyfluoroalkyl substances ( PFAS) and an Aquifer Storage and Recovery ( ASR) project to boost its water supply reliability. With future groundwater treatment and purchase of SCWSP Phase II, the City has adequate supplies through 2045 during normal and dry years.
HYDRAULIC ASSESSMENT
EKI updated the water system hydraulic model to represent the City' s utility infrastructure as of January 2023. The hydraulic model, along with the updated demand projections developed in Section 4, was used to evaluate capacity needs for current and future demand conditions and to complete the hydraulic assessment portion of the WSMP. EKI validated the updated model by comparing the model results to system operations data.
Existing infrastructure and key planned infrastructure were assessed under an Existing ( 2022) scenario and a Buildout ( 2045) scenario. Planned future infrastructure to support future development is shown in Figure ES -2.
The City' s water distribution system is primarily assessed against its ability to supply required pressures under peak demand and fire flow conditions. Pipe velocity and head loss criteria are secondary criteria that indicate which pipes could be upsized to increase downstream pressures and improve water movement within the system. Due to the updated water demand projections evaluated herein, no new hydraulic deficiencies are identified compared to the 2019 WSMP. eki environment
water ES -2
December 2024
EKI C20049. 01
195
2024 WSMP Amendment
EXECUTIVE SUMMARY City of Lathrop
SUPPLY, STORAGE, AND PUMPING CAPACITY ASSESSMENT
The City currently has adequate supply, storage, and peaking pumping capacity to meet design criteria.
Additional supply, storage, and peak pumping capacity will be required to support future development.
RECOMMENDED CAPITAL IMPROVEMENT PROGRAM
EKI recommended modifications and additions to the list of recommended capital improvement projects CIPs) included in the 2019 WSMP. Two new water supply projects ( PFAS treatment at the LAWTF and ASR) are identified in Section 5.6. No new distribution system CIPs are required; several remaining CIPs identified in the 2019 IWRMP are no longer recommended or have been modified.
Figure ES -3 shows an overview of the collection system capacity project locations, and Table ES - 2 summarizes all the identified capacity improvement projects and their estimated planning level opinion of probable costs ( OPCs).
eki environment
water ES - 3
December 2024
EKI C20049. 01
196
1 Emergency Stockton Intertie
ATRROP RD
JI
1- TurnouSSDt l7
WeII 8• LOUISE AV
LAWTF Tank
a- d BPS
Well 10
TWell9 YOSEMITE AY
VVell 21
WeII21
l®
Imo
Sphere of Influence
Existing City Infrastructure
Treatment Plant
al Pump Station
Enclosed Storage Facility
Ej SSJID Turnout
Fb Production Well
Emergency Intertie
Raw Water Main
Existing Pipe Diameter, Inches
Less than and equal to4
8 10
16 20
24 30
Abbreviations
BPS = booster pump station
LAWTF = Louise Avenue Water Treatment Facility
SOI = Sphere of Influence
SSJID = South San Joaquin Irrigation District
Notes
1. All locations locations are approximate.
2. Well9 is currentty offline due to water quality issues.
Well 21 and the Well 21 WTF are inactive.
Sources
1. Aerial photograph provided by ESRI' s ArcGIS Online, 13 November 2024. o 3, 000 6, 000
soeie e, Feet)
Existing Water System Infrastructure
Water System Master Plan Amendment
CM or Lathrop
Lathrop, CA
ekienvironment Dec` m0049. 0ber
e
water Figure ES -
1 197
Legend
L1Sphere of Influence
Existing Infrastructure
Treatment Plant
W Pump Station
Enclosed Storage Facility
C SSJID Turnout
Pipe
Future Facilities
Pump Station
Enclosed Storage Facility
SSJID Turnout
Future Pipe Diameter, Inches
8 — 18
10 20
12 - 24
16 - 30
Abbreviations
BPS = booster pump station
LAWTF = Louise Avenue Water Treatment Facility
SOI = Sphere of Influence
SSJID = South San Joaquin Irrigation District
Notes
1. All locations are approximate.
Sources
1. Aerial photograph provided by ESRI' s ArcGIS
Online, 13 November 2024.
N 0 3, 000 6, 000
15cek in Feet)
Modeled Existing and Future Infrastructure
Water System Mater Plan Amendment
CO of Lathrop
Lathrop, CA
December 2020 ek December
I & C20049.
water
01 Figure ES -2
198
i River Islands Phase 2 • „> j
e
I Tankgnd: BPS_ , < 4- ' rt.'
BPS - 3,
DOS REIs RD r
r
I
I
1 r
rr, rT.. f 10
i ,-; : Iirri1 i,l_q I
I._. '
r, Yi i
7 El i
I
r+iY'; WD -3: Northern ' McKinley
I S _ ri
Industrial Area Fire Flow
14.-=.: t Improvement Proect
9 --_ J
yv% \ KA' lif FF. BPsY• 1 WD4: Murphy Parkway Fire t.F t i-` , • `40 1•` i
Flow Improvement Project,] r, r` yCr e e
f1 t'
LArnRop RD
L_ SSJID
Turnout 1
1 t
i~
j ` a ! Ilii-:-_„?\ ;',. _ ,./> )
1 I w LAWiF
04 y t' :. vfu„' 7. i "1. 0 • • 1`y) 4.1 -_ J.
1 1;:-... 4:: 2‘;‘::;. ..(' d tr . a,• iM, T•_.__ c-.±= 4,7_,_..),.• ' 1_z^I *v..,„ '--" i ,/// rr I — f-... yvv` I-"`•-• ; t ;' < ` T'
I
i::, 3 r . /
1-----...
i _`.\
S i-1:: tili hbet- i '---,- J
Tank `
t
i ,. r` Y` ; / I
1-• r; I L / •
WD - 2: Harlan Road and South Harlan Road
Fire Flow Improvement Project
WD - 5: Lathrop Transmission Main Improvement Project
WD -1: East J Street Alley Residential Fire Flow Improvement Project s i.
I ' a ` a __ di t -
I
i r BPS -5
y
k-• •-/'SSJID-- Ltv `
Tank
f
I____% Tumout2 0,
f
1 BPS -2
Tank
s
L"-
LOUISE AV
ank and BPS
WS - 3: I.AWTF Centralized
PFAS Treatment Project
1 Tank
an BPS
WS - 6: Tank and BPS
at Well 21 site
YOSEMITE AU
L+e. oend
Sphere of Influence
Existing Infrastructure
Treatment Plant
Pump Station
e Enclosed Storage Facility
SSJID Turnout
Existing Pipe
Future Infrastructure
Future Pump Station
Future Enclosed Storage Facility
Future SSJID Turnout
Future Pipe
Recommended CIPS
a Replace existing hydrant with 8 -inch hydrant & lateral Future Pump Station
Future Enclosed Storage Facility
Future SSJID Turnout
Replacement Pipe, inches
6 8
12 New Pipe, inches
6 8
Abbreviations
BPS = booster pump station
LAWfF = Louise Avenue Water Treatment Facility
SOI = Sphere of Influence
SSJID = South San Joaquin Irrigation District
Notes
1. All locations are approximate.
Sources
1. Aerial photograph provided by ESRI' sArcGIS
Online, 13 November 2024.
N 0 3, 000 6, 000
A ( Bub In Feet)
Recommended Water System Improvements
eki
Nieta, System Master Plan Amendment
City of Lathrop
Lathrop, CA
environment
December 2024
water
C2o04a. 01
Figure ES - 3
199
EXECUTIVE SUMMARY
2024 WSMP Amendment
City of Lathrop
Table ES -2. Summary of Recommended Water System Capital Improvement Projects Project #
Water Supply
Time
Addresses Fire Total Project OPC
Project ( a) Frame
b)
Flow Deficiency ( c)( d)
Improvements
WS -1
Well 10 Testing, Analysis and
Modifications ( PW 22- 37) (e)
Existing 844, 527
WS -2
Booster Pump Stations Upgrade
Project ( PW 24- 10) (e)
Existing 800, 00
WS -3
Groundwater Treatment
Improvements ( PW 20- 16) (e)
Existing 25, 564, 010
WS 4
SSJID Turnout 1 Emergency Backup
Power ( f)
Buildout 930, 00
WS -5 Tank and BPS at the Well 21 Site ( g) Buildout 5, 640, 000 WS -6 SSJID SCWSP Phase 2 ( f) Buildout 28,80, 000
WS -7 SSJID Turnout 2 Expansion ( f) Buildout 4,90, 000 WS 8
Aquifer Storage and Recovery
PW 22- 36) (d) (e)
Buildout 9, 000,0
TOTAL WATER SUPPLY IMPROVEMENTS OPC $ 75, 550, 000
Water Distribution System Improvements
WD -1
East J Street Alley Residential Fire
Flow Improvement Project ( PW 25-
10)
Existing Yes 400, 00
WD 2
Harlan Road Fire Flow Improvement
Project ( PW 25- 10) (e) (h) (i)
Existing Yes 1,90, 000
WD 3
Northern McKinley Industrial Area
Fire Flow Improvement Project
Existing Yes h)
WD -4
Murphy Parkway Fire Flow
Improvement Project
PW 24- 11) (e) (j)
Existing Yes 180, 00
WD -5
Lathrop Transmission Main
Improvement Project ( PW 25- 10) Existing Yes 570, 00
WD -6
Lathrop Water Main and
Lateral Upgrade Project ( PW 24- 12)
e)
Existing Yes 120, 00
TOTAL WATER DISTRIBUTION SYSTEM IMPROVEMENTS OPC 2, 460, 000 Notes:
a) Project information is obtained from Table 9- 1 of the 2019 WSMP with their costs escalated to December 2024 dollars, and includes modifications recommended in Sections 9. 1 and 9. 2. b) Time frame refers to when projects are identified to be required. c) Costs shown are presented in December 2024 dollars based on an ENR CCI of 13, 632. 41 (20 -city average), with totals rounded to the nearest $10, 000, except for projects called out in footnote e).
d) Costs include mark- ups equal to 60% for construction contingency (25%), design ( 10%), construction management ( 10%), permitting ( 10%), and Project Implementation ( 5%). eki environment
water ES - 7
December 2024
EKI C20049. 01
200
2024 WSMP Amendment
EXECUTIVE SUMMARY City of Lathrop
e) Improvements and associated costs have been carried over from the City of Lathrop Capital Improvement Programs Fiscal Years 2023 - 2025 ( City of Lathrop, 2023). f) Construction costs for improvements have been carried over from estimates in the 2013 Draft Water Master Plan, escalated to December 2024 dollars.
Construction costs for Tank and BPS at the former Well 21 site reflect the engineer' s estimate
prepared by H2O Urban Solutions in July 2017, escalated to December 2024 dollars. h) This project will be conditioned for private development to complete. i) For planning purpose, cost estimated shown in the table was based on 6 -inch for existing water mains along Old Harlan Road between Shilling Avenue and Lathrop Road, City to verify the actual size since inconsistent pipe diameters observed in available documentation. j) Costs were updated to reflect reduced project scale as recommended in Section 9. 1. g)
eki environment
water ES -8
December 2024
EKI C20049. 01
201
Section 1
INTRODUCTION
2024 WSMP Amendment
City of Lathrop
1 INTRODUCTION
EKI Environment & Water, Inc. (EKI) has prepared this Water System Master Plan Amendment ( WSMP Amendment) for the City of Lathrop, California ( City). This WSMP Amendment was developed as part of the 2024 amendment to the City' s Integrated Water Resources Master Plan ( IWRMP Amendment), a comprehensive planning process involving the City' s
Potable Water, Wastewater and Recycled Water
Master Plans. This WSMP Amendment updates the City' s 2019 WSMP ( EKI, 2019a). The IWRMP Amendment was completed through a coordinated effort between multiple City departments and provides a unifying framework to support utility operations and capital improvement program ( CIP) development and implementation.
1. Project Background
The City' s 2019 IWRMP, which includes the City' s
Water System Master Plan, Wastewater System Master
Plan, and Recycled Water Master Plan, was finalized and approved by the City Council in December 2019 after a California Environmental Quality Act ( CEQA) process ( EKI, 2019a; 2019b; 2019c). Since the IWRMP was completed, new information has become available and certain planning assumptions have changed that require an amendment to the IWRMP, including the following:
Land Use Information: The City completed a General Plan Update in September 2022 which included updated growth projections for the City ( Lathrop, 2022a). In addition, development projections have changed significantly in the River Islands planning area with approval of the modified River Islands Phase 2 project in June 2021 and in the Central Lathrop Specific Plan area Lathrop, 2022b).
Water Demand Factors and Projections: The City' s unit water demand factors and water demand projections were updated in July 2020 to support the River Islands Phase 2 development Water Supply Assessment, which were later incorporated into the City' s 2020 Urban Water Management Plan ( UWMP). The updated demand evaluation was based on the City' s water use patterns observed since the 2014-017 drought, which are significantly lower compared to those included in the 2019 IWRMP which had been based on the City' s pre -drought water patterns.
Water Supply Information: The City' s water supply reliability and water supply infrastructure investments need to be reassessed based on the updated water supply projections presented in the 2020 UWMP and any subsequent management efforts. For example, the City' s imported surface water from the South County Water Supply Project (SCWSP) could experience significant cutbacks in light of the Bay Delta Plan Amendment and the resolution of the resultant settlement negotiations. Future, the City has experience water quality issues with its groundwater supply associated with the nearby former Occidental Chemical Corporation remediation site and detections of per- and polyfluoroalkyl substances ( PFAS). These issues limit the City' s ability to expand groundwater production in the future. The City conducted engineering feasibility studies for adding PFAS treatment of the Louise Avenue Water Treatment Facility ( LAWTF) and an aquifer storage and recovery ( ASR) project to improve water supply reliability.
River Discharge Permit: The City has obtained a National Pollutant Discharge Elimination System NPDES) permit to dispose a portion of the wastewater treated at the Lathrop Consolidated Treatment Facility ( CTF) in the San Joaquin River, with the remaining portion delivered as recycled water to irrigate urban parks and landscaping. To support use of recycled water for landscape irrigation, the City obtained coverage under General Order WQ- 2019- 0058- DDW- R5017 and submitted a Title 22 Report Addendum in 2020. The City began delivering recycled water for urban uses in the summer of 2021. These changes reduce the City' s potable water demand, and affect eki environment
water 1-
December 2024
EKI C20049. 01
202
Section 1
INTRODUCTION
2024 WSMP Amendment
City of Lathrop
the operations and infrastructure needed of the City' s wastewater effluent disposal and recycled water distribution systems.
1. 2 Scope of Work
The scope of work for the WSMP Amendment included the following primary tasks:
Update of the water system hydraulic model network to incorporate system improvements completed since the 2019 WSMP or those currently in design or under construction, including system expansions related to new development and capital improvement projects completed by the City.
Update the backbone water system infrastructure included in the future water system hydraulic model network for future development areas based on recent utility plans completed by City or Developers ( e.g., the River Islands Phase 2 plans, the Mossdale Landing West Tentative Map); Verification of operational settings with input from City operations staff and update of the settings in the hydraulic model for pumps and tanks, as needed;
Verification and update of land use -specific water demand factors based on water use between 2017 and 2021;
Reallocation of parcel -by -parcel average day demands ( ADD) in the model based on an updated demand evaluation and allocation of demands associated with new development added since the prior hydraulic model update;
Development of water demand projections based on the land projections included in the General Plan Update (adopted September 2022) and River Islands Phase 2 project (approved in June 2021); Evaluation of water supply reliability based on information from the 2020 UWMP and the City' s PFAS treatment and ASR feasibility studies;
Assignment of fire flow demands to each new fire hydrant based on associated land use; Assessment of the Existing ( 2022) and Buildout ( 2045) water system performance under current and future flow conditions using steady- state model simulations; Evaluation of water distribution system performance, e.g., system pressures, velocity, and head loss deficiencies, and fire flow deficiencies;
Evaluation of storage and booster pump station ( BPS) capacities; Verification and update of the list of capital improvement projects ( CIPs) included in the 2019 WSMP; and
Preparation of the amended WSMP document.
1. 3 Report Organization
The WSMP is organized into the following sections:
Section 1- Introduction
Section 2 - Study and Water Service Area
Section 3 - Existing Water System
Section 4 - Existing and Future Water Demands
eki environment
water 1- 2
December 2024
EKI C20049. 01
203
Section 1
INTRODUCTION
2024 WSMP Amendment
City of Lathrop
Section 5 - Water System Supplies
Section 6 - Water System Performance and Operations Criteria Section 7 - Distribution System Hydraulic Capacity Evaluation Section 8 - Water Supply, Storage, and Pumping Capacity Evaluation Section 9 - Recommended Capital Improvement Program
Section 10 - References
eki environment
water 1- 3
December 2024
EKI C20049. 01
204
Section 2 2024 WSMP Amendment
STUDY AND WATER SERVICE AREAS City of Lathrop
2 STUDY AND WATER SERVICE AREAS
The City of Lathrop ( also referred to herein as the City) was incorporated on July 1, 1989 and is located in San Joaquin County, approximately 10 miles south of the City of Stockton and directly west of the City of Manteca. The City lies east of the Coastal Range that separates California' s Central Valley from the San Francisco Bay Area. Interstate 5 ( I-5), a major north -south interstate corridor, bisects the City. The City is also connected by Highway 120 which runs east -west through the southeastern - most part of the City, and by Interstate 205, which connects Interstate 580 to I-5. The City is also served by the Altamont Commuter Express ( ACE) train, which travels along the southern and eastern border of the City. The community was originally developed primarily east of I-5. Beginning in 2003, major new developments have been constructed west of I-5 and others are currently planned or under construction in this area.
This section provides an overview of the City' sservice area, including discussions of the City' sservice area boundaries, planned developments, and population.
2. 1 City Limits, Sphere of Influence, and Service Boundaries The City currently encompasses an area of approximately 13, 400 acres, or about 20. 9square miles. The City' s Sphere of Influence ( SO1) is slightly larger with an area of about 13, 600 acres, or 21. square miles.
The City' s SOI includes two unincorporated areas:
1. Approximately 134 acres northeast of the City boundary and along Roth Road that is designated Freeway Commercial and Limited Industrial, and
2. Approximately 62 acres southeast of the City boundary that is designated Service Commercial and part of the Lathrop Gateway Business Park Specific Plan area.
The City reduced their SOI in 2016 to exclude an additional unincorporated area ( approximately 2, 100 acres) located north of the Central Lathrop Specific Plan ( Central Lathrop or CLSP) area and west of I-5.
Much of this area does not have a General Plan land use designation. The City has designated this area as an Area of Interest (AOI) (Lathrop, 2016). Figure 2-1 shows the City limits, SOI, and AOI.
As shown in Figure 2-1, the City' s water service area is generally contiguous with the City limits and includes the railroad cargo container commercial enterprise that is outside of the City limits.
The City currently provides water service to approximately 9,22 residential, commercial, industrial institutional/ governmental, irrigation, agricultural, and other/ construction service connections, of which approximately 223 services are dedicated for irrigation uses. All of the City' s water services are metered.
The City began providing water to the 724 -acre Sharpe Army Depot in 2022. 1
2. Specific Plans and Large Planned Unit Development
The City has experienced significant growth in recent years and is anticipating growth to continue, particularly in several approved or pending large development projects within the City. Infrastructure needs for these projects are evaluated in this document. These projects are described below and shown on Figure 2-1 and Table 2-1, based on City and developer projections. Specifically, Table 2- 1 lists the number of new residential dwelling units and commercial, industrial, and institutional ( CII) acreage that is 1 As of the September 2024, only the Army & Air Force Exchange Service ( AAFES) along with a couple of buildings on Roth Road receive potable water from the City, while Sharpe Army Depot still operates its onsite drinking water system for the remainder of the facility.
eki environment
water 2-1
December 2024
EKI C20049. 01
205
Section 2 2024 WSMP Amendment
STUDY AND WATER SERVICE AREAS City of Lathrop
anticipated to be served by the City' spotable water system in five- yearincrements between 2025 and the anticipated buildout in 2045. A general description of the development areas and the total development planned at buildout is described below.
Central Lathrop Specific Plan. The Central Lathrop Specific Plan proposes development of 1, 520 acres located west of I-5. Phase 1 of the project is anticipated to be completed by 2040 and consists of a total 579 high density units, 1, 483 variable density residential units, and 146 acres of commercial land uses. The project also includes two schools and 161 acres of recreational land use and open space. Phase 2 of the project includes 682 acres of light industrial use and a 5 -acre park.
Mossdale Landing. Mossdale Landing is a mixed - use master planned community that is anticipated to be completed by 2030. Construction at Mossdale Landing began in 2003 and approximately 1, 640 residential units have been constructed thus far. An additional 66 low density residential units are anticipated by project completion. In addition, the development is allocating a total of 35 acres land for two schools, 40 acres for parks, and 25 acres for commercial development.
Mossdale Landing East. Mossdale Landing East ( formerly referred to as Lathrop Station) is anticipated to be completed by 2030. Approximately 490 residential units have been constructed so far. An additional 37 low density units are anticipated by project completion. The development plan also includes a total of 6. 5 acres of village commercial, 13. 2acres of service commercial, and
27. 5 acres of highway commercial land uses.
Mossdale Landing South. Mossdale Landing South is a proposed 104 -acre development that is anticipated to be completed by 2030. Approximately 140 medium and high density units have been constructed so far. An additional 85 medium density units are anticipated by project completion. In addition, the project includes a total of 28 acres of commercial, 25 acres of open space, and 9. 5 acres of parks.
Mossdale Landing West. Mossdale Landing West is a proposed residential development that is anticipated to be completed by 2032. The project will be located on the Silveira property and consist of 829 low density dwelling units and 11 acres of parks.
River Islands. The 4, 995 -acre River Islands development is located west of the San Joaquin River and east of Paradise Cut on land known as the Stewart Tract. The development proposes a mixture of low, medium, and high density residential units. According to its recently amended Specific Plan, River Islands will consist of two phases and a total of 15, 000 homes, a 260 -acre employment center, a 79 -acre town center, 235 acres of parks and ten schools. About 2, 800 low density residential units were constructed and occupied by late 2022. The estimated project completion date is 2040 ( Lathrop, 2022b; Woodard & Curran, 2020).
Lathrop Gateway Business Park Specific Plan. The Lathrop Gateway Business Park Specific Plan Lathrop Gateway) proposes commercial and industrial development of approximately 384 acres to be completed by 2040. The City annexed 213 acres of this area in June 2012 and 99 acres of the remaining 117 acres in May 2016. This would result in approximately 4. 7 million square feet of service commercial, limited industrial, distribution, and research and development related uses, and approximately 741, 000 square feet of commercial office and retail uses. The first phase of the project includes approximately 167 acres of limited industrial, 83 acres of service commercial, and 57 acres of office and commercial retail uses and is anticipated to be completed by 2030.
eki environment
water 2-
December 2024
EKI C20049. 01
206
Section 2 2024 WSMP Amendment
STUDY AND WATER SERVICE AREAS City of Lathrop
South Lathrop Specific Plan. The South Lathrop Specific Plan ( South Lathrop) was approved by the City Council on 20 July 2015 and includes a 315 - acre plan area. The Specific Plan proposes approximately 10 acres of commercial office uses, 246 acres of limited industrial, 31 acres of open space, and 27 acres of roads and public facilities. The City South Lathrop Specific Plan area was annexed into the City in May 2016. The South Lathrop Commerce Center, approximately 272 acres within the South Lathrop Specific Plan, is anticipated to be completed by 2030. The South Lathrop Commerce Center will encompass all of the South Lathrop Specific Plan area with the exception of approximately 24 acres of light industrial, 1. 2 acres of office commercial, and 19 acres of open space and public roads.
Historic Lathrop Infill and Other Developments East of I-5. The portion of the City east of I-5 is anticipated to include infill development and added density in the future. Currently, this area consists of approximately 3, 160 low density and 455 medium density units, commercial and industrial areas, and a few public parks. Future residential growth of this area is expected on undeveloped/ underutilized and redeveloped parcels consolidated from large lots where low density residential units would be demolished. New residential projects are estimated to consist of 52 low density, 218 medium density, and 48 high density residential units, increasing the total existing residential unit count by 318 units.
Sharpe Army Depot. During World War II, the US Army created the Sharpe Army Depot ( Depot) in the rural Lathrop Community to allow shipment of major army supplies to the western United States. The Depot is comprised of a 724 - acre facility south of Roth Road and has served both the Army and Airforce with a variety of supplies depending on the demand of goods and supplies created by war time efforts. The Depot is occupied by the Army & Air Force Exchange Services AAFES) West Coast Distribution Center that employs 348 workers. Prior to 30 September 2014 the Defense Logistics Agency was also housed at the Depot; its workforce of 700 workers has since been transferred to the larger Tracy Army Depot. The City began providing water and sewer services to the Sharpe Army Depot in 2022, including the AAFES and California National Guard properties.
eki environment
water 2- 3
December 2024
EKI C20049. 01
207
Central
tallow
Lacer
South
Lathrop
ya
Sherpa
Army
Depot
and Other Deveipmts
Legend
IJj city Limit
EDSphere of Influence
EnArea of Interest
Rail Cargo Container Yard
Development Areas
3 Central Lathrop
Crossroads
Q Historic Lathrop Infill and Other Developments
QLathrop Gateway
Mossdale Landing
Mossdale Landing West
Mossdale Landing East
Mossdale Lending South
ORiver Islands
Sharpe Army Depot
izzi South Lathrop
Notes
1. All locations are approximate.
Sources
1. Aerial photograph provided by ESRI' s ArcGIS Online, 13 November 2024.
N
0 A
4. 000 8, 000
Sala in Feat)
City of Lathrop Boundaries
and Development Areas
Water System Master Plan Amendment
City of Lathrop
Lathrop, CA
er 2024 ski environment DecC20048 czD0481 4e 0
water Figure 2. 1
208
Section 2
STUDY AND WATER SERVICE AREAS
2024 WSMP Amendment
City of Lathrop
Table 2-1. City of Lathrop Potable Water Development Projections by Development Area Land Use Designation
Central Lathrop- Phase 1
Low Density Residential du 500 264 764
High Density Residential du 246 210 123 579
Mixed Use ac 51 51
Commercial ac 13 61 72 146
Central Lathrop - Phase 2
Light Industrial / R&D Flex ac
ac
90 592 682
Parks 5. 0 5. 0
Mossdale Landing
Low Density Residential du 66 66
Commercial ac 4. 6 1. 5 6. 1
Schools ac 16. 2 16. 2
Mossdale Landing East
Low Density Residential du 37 37
High Density Residential du 84 84
Commercial ac 7. 0 7. 0
Mossdale Landing South
Medium Density Residential du 85 85
Commercial ac 8 17 25
Parks ac 4. 0 4. 0
Mossdale Landing West
Low Density Residential du -- -- 829 -- -- 829
River Islands
Low Density Residential du 768 1, 218 1, 218 1, 218 4,22 Medium Density Residential du 676 945 945 945 3, 511
High Density Residential du 1, 395 1, 395 1, 395 4, 185 Town Center ac 22 22 22 67
Commercial ac 73 73 73 220
Schools ac 11 5. 4 5. 3 5. 1 26. 9
Parks ac 1. 3 4. 3 4. 3 4. 3 14. 4
Landscape Areas ac 1. 5 1. 1. 1. 4. 7
Street Landscape Area ac 0. 3 1. 1. 1. 3. 6
South Lathrop
Light Industrial / R&D Flex ac 67. 0 32. 8 99. 75
Office Commercial ac 8. 1. 2 10. 0
Lathrop Gateway
Light Industrial / R&D Flex ac 66 17 83
Commercial ( Office and Service) ac 51 12 63
Open Space ac 2. 5 1. 6 4. 1
Public Landscaping ac 2. 6 8. 11. 4
Crossroads
Industrial ac 23 23
Commercial ac 1. 5 1. 5
Incremental
Incremental New Development ( a)( b)( c)
New
Units 2025 2030 2035 2040 2045 By Buildout
Buildout )
ek, environment
water 2- 5
December 2024
EKI C20049. 01
209
Section 2
STUDY AND WATER SERVICE AREAS
2024 WSMP Amendment
City of Lathrop
Table 2-1 (Cont.). City of Lathrop Potable Water Development Projections by Development Area Land Use Designation
Historic Lathrop and Other Developmen
Low Density Residential du 12 6 5 29 52
Medium Density Residential du 27 26 26 26 113 218
High Density Residential du 48 48
Commercial ac 22 14 8 44
Industrial ac 18 24 42
Sharpe Army Depot
Incremental New Development ( a)( b)( c)
Units 2025 2030 2035 2040 2045
Buildout)
Areas
Total New
Development
Industrial ac d) d)
Notes:
a) Dwelling unit counts and acreages were based on information provided by developers and the City in November 2016, December 2016, May 2017, July 2017, July 2020, and April 2023 and adjusting for the future development to be supplied by recycled water in Central Lathrop and River Islands. b) Includes dwelling units and acreages that are assumed to be developed during the preceding five- year period. c) Area of landscape parcels and parks includes areas to be irrigated with potable water only. d) The existing facilities at the Sharpe Army Depot has been connected to City' s water service in summer 2022. Due to
incomplete billing records from the Sharpe facility, water demands are estimated using historical metered consumption from the AAFES facility and projections provided on 12 April 2018 for the California Military Department facility, as seen in Table 4-5.
Qki environment
G & water 2-6
December 2024
EKI C20049. 01
210
Section 2
2024 WSMP Amendment
STUDY AND WATER SERVICE AREAS City of Lathrop
2. 3 Current and Projected Population
Values for the historical and current population within the City' s water service area were obtained from
data reported by the California Department of Finance ( DOF) within the City Limits. Although Lathrop' s water service area includes a railroad cargo container commercial enterprise that is outside the City limits, the service area population is estimated to be equivalent to the City population. As of January 2023, the population estimate for Lathrop was 35, 080 (California DOF, 2023). The historical and current population data within the City' swater service area are presented in Table 2-.
Population in the City has grown by approximately 410% over the 32 -year period between 1990 through 2023, from approximately 6, 800 to 35, 100 (California DOF, 2007, 2012, and 2023). Between 2005 and 2023, population increased by 174%, from approximately 12, 800 to 35, 100.
The City anticipates that population will continue to grow in the future given the existing entitlements for several large residential developments, discussed above in Section 2.. The population projections for 2025 through 2045, summarized in Table 2-3, are estimated using the existing population ( as determined by California DOF) and adding the amount of new housing anticipated to be permitted in each five- year increment based on Table 2-1. The population added each year is projected by multiplying the most recent number of new housing units by ( 1) 4. 02 person per dwelling unit based on Census data for low density developments, which consists of a large majority of the City' s existing land uses and ( 2) 3. 0 persons per
dwelling units for future medium density and high -density dwelling units ( U. S. Census, 2023). Current and projected population trends are shown on Figure 2-. The projected residential buildout is summarized by each development area in Table 2-4.
eki environment
water 2- 7
December 2024
EKI C20049. 01
211
Section 2
STUDY AND WATER SERVICE AREAS
2024 WSMP Amendment
City of Lathrop
Table 2-. Historical Service Area Population
Year
1990
Service Area Population ( a)
6, 841
Annual Growth Rate
1991 7, 018 2.6%
1992 7, 063 0.6%
1993 7, 434 5.3%
1994 8, 410 13.%
1995 8, 713 3.6%
1996 9, 031 3.6%
1997 9, 172 1.6%
1998 9, 508 3.7%
1999 9, 786 2.9%
2000 10, 445 6.7%
2001 10, 802 3.4%
2002 11, 616 7.5%
2003 12, 089 4.1%
2004 12, 482 3.%
2005 12, 768 2.3%
2006 14, 489 13. 5%
2007 16, 271 12. 3%
2008 17, 282 6.2%
2009 17, 589 1.8%
2010 18, 023 2.5%
2011 18, 688 3.7%
2012 19, 090 2.%
2013 19, 642 2.9%
2014 20, 158 2.6%
2015 20, 796 3.2%
2016 22, 174 6.%
2017 23, 117 4.3%
2018 24, 185 4.6%
2019 25, 401 5.0%
2020 26, 833 5.6%
2021 29, 384 9.5%
2022 31, 575 7.5%
2023 35, 080 11.%
Notes:
a) Historical and current population is based on population estimates by the California DOF for the City of Lathrop included in DOF, 2007; DOF, 2012; DOF, 2022; and DOF, 2023.
Qki environment
i & water 2-8
December 2024
EKI C20049. 01
212
Section 2
STUDY AND WATER SERVICE AREAS
2024 WSMP Amendment
City of Lathrop
Population
Served
Table 2-3. Current and Projected Service Area Population Current and Projected Service Area Population ( a)( b)
Year 2023 2025 2030 2035 2040
2045
Buildout)
Population Served 35, 080 40, 531 55, 471 72, 513 84,97 86, 013 Notes:
a) Current population is based on population estimates by the California DOF for the City of Lathrop included in DOF, 2023.
b) Projected populations for 2025 through buildout (2045) are based on residential unit counts from Table 2-1, multiplied by 4. 02 persons per dwelling unit for low density developments ( U. S. Census, 2023) and 3. 0 persons per dwelling unit for medium and high density developments.
100, 00
90, 000
80, 000
70, 000
60, 000
50, 000
40, 000
30, 000
20, 000
10, 000
eki
0 1990 1995 2000 2005 2010 2015 2020 2025 2030 2035 2040 2045 Year
4—Historical Population — 6 — Projected Population
Figure 2-. Historical and Projected Service Area Population i
environment
water 2- 9
December 2024
EKI C20049. 01
213
Section 3 2024 WSMP Amendment
EXISTING WATER SYSTEM City of Lathrop
3 EXISTING WATER SYSTEM
The City' s existing water system facilities consist of five groundwater wells ( Wells 6, 7, 8, 9, 10), the Louise Avenue Water Treatment Facility ( LAWTF) for treatment of groundwater from Wells 6- 10, two surface water turnouts for delivery of South County Water Supply Program ( SCWSP) from South San Joaquin Irrigation District ( SSJID), seven storage tanks and booster pump stations, and approximately 156 miles of pipeline. The City' s distribution system operates as a single pressure zone. Figure 3-1shows the City' sservice area and locations of the City' s major water system facilities. These facilities will be described in further detail in the following sections.
3. 1 Water Supply and Treatment Facilities
The City' s water supply and treatment facilities are described in the following sections. The City' s water supply facilities and an assessment of the City' s water supply reliability are discussed further in Section 5.
3. 1. Groundwater Wells, Raw Water Pipelines, and Treatment Facilities The City currently operates five municipal groundwater supply wells: Wells 6, 7, 8, 9, and 10. WeII 9 is currently offline due to water quality issues and may be used in the future as an emergency well until water quality issues are addressed to meet drinking water standards. A sixth City well, WeII 21, is currently not in operation. Table 3-1 provides information about well age, depth, status, design and measured flow rates, and treatment. As shown on Figure 3-1, these wells are located on the eastern side of the City' sdistribution system. Groundwater from wells 6, 7, 8, 9, and 10 is conveyed via 12 -inch and 16 -inch water mains along the eastern border of the City along the railroad tracks to the LAWTF, where the groundwater is treated to remove arsenic. The LAWTF began operating in 2012 and has a treatment capacity of 6, 250 gallons per minute (gpm).
A series of sampling events in the City' s production wells during 2019 and 2020 showed that perfluorooctanoic acid ( PFOA) and perfluorooctanesulfonic acid ( PFOS) concentrations in groundwater from WeII 9 exceeding both the Notification Levels ( NLs) and Response Levels ( RLs), which were established by the State Water Resources Control Board Division of Drinking Water ( SWRCB DDW). The NLs for PFOS were also exceeded in one or more samples collected from Wells 6, 7, 8, and 10. PFOA concentrations in groundwater from Wells 6, 7, 8, and 10 were below reporting limits. Based on these and historical sampling results, the City took WeII 9 offline so that the PFOA concentrations in the blended flow from remaining wells is well below the RLs.
The WeII 21 site includes a treatment facility ( Well 21 WTF), designed for disinfection and manganese treatment. The City last operated WeII 21 and WeII 21 WTF between January 2012 and November 2013.
WeII 21 has remained inactive since November 2013 due to sanding in the well and elevated levels of PFAS, arsenic and uranium. The City does not currently plan to bring the well or WTF back online due to poor groundwater quality.
3. 1. 2 Surface Water Turnouts
The City purchases imported surface water from SSJID through SCWSP, which supplies treated Stanislaus River water ( see Section 5.1). There are two SSJID turnouts ( SSJID Turnout 1 and SSJID Turnout 2). SSJID Turnout 1 is located on Lathrop Road, east of McKinley Avenue, and has a peak capacity of 7. 5 million gallons per day ( MGD). Due to downstream distribution system capacity limitations, the current maximum capacity of SSJID Turnout 1 is approximately 3 MGD.
SSJID Turnout 2 is located west of the Manthey Road and Stewart Road intersection and north of the railroad tracks ( i.e., adjacent to the City' s
BPS -5 site) and has a peak capacity of 11. 52 MGD.
eki environment
water 3- 1
December 2024
EKI C20049. 01
214
Section 3 2024 WSMP Amendment
EXISTING WATER SYSTEM City of Lathrop
SSJID Turnouts 1 and 2 both include 1. 0 -million -gallon ( MG) SSJID tanks, which are not owned by the City and are therefore not included in storage calculations ( see Section 3. 2.1).
3. 1. Emergency Interties
The City has an emergency intertie located near Roth Road, at the northern city limits near the City of Stockton. Further investigation is needed to confirm the status of this intertie and the connecting water system ( i.e. City of Stockton, California Water Service, or County of San Joaquin) and whether an agreement exists to operate the intertie in the event of an emergency.
The City does not have an intertie with the City of Manteca, which may be considered in the future. ek, environment
water 3-2
December 2024
EKI C20049. 01
215
Emergency Stockton Intenie •
F. -
L.,
t
BPS -7
Tank,
s
BI16
rTarik
ui- HooP RD
SSJID
7' I Turnout 1
Well?
1Jwell
Well 8.
8P r
LAWTF Tank and BPS
1•
Well 10
Well 9
ilYOSEMITE A
Well 21 1
Well 21
WT...,
SSJI »
BPS - 5
Tank
Turnout 2
Lepend
Sphere of Influence
Existing City Infrastructure
Treatment Plant
O Pump Station
Enclosed Storage Facility
C SSJID Turnout
Production Well
Emergency Intertie
Raw Water Main
Existing Pipe Diameter, Inches
Less than and equal to 4
8 10
12 16
18 20
24 30
Abbreviations
BPS = booster pump station
LAWTF = Louise Avenue Water Treatment Facility
SOI = Sphere of Influence
SSJID = South San Joaquin Irrigation District
Notes
1. All locations are approximate.
2. Well 9 is currently offline due to water quality issues.
Well 21 and the Well 21 WTF are inactive.
Sources
1. Aerial photograph provided by ESRI' s ArcGIS Online, 13 November 2024.
N
o
A _
3. 000 6, 000
MuA in reey
Existing Water System Infrastructure
Wafer System Master Plan An endrna t
cM or Lathrop
Lathrop, CA
December 2024 ek December
IC20049. water 01Figure 3- 1
216
Section 3
EXISTING WATER SYSTEM
2024 WSMP Amendment
City of Lathrop
WeII ID Location
WeII 6
1991
Park Street
Current Backup
Status ( b) Power
Active
Table 3-1. Active Groundwater Well Information
VFD
Date
Drilled
1986
Age of
WeII
years)
36 Completed Design
Well Casing Flow
Depth Rate
ft bgs) ( gpm)
270 1, 200
Measured Design
Flow Rate Head
gpm) ( feet)
1, 650 221
Well 7 15800 5` hStreet Active 1989 33 270 1, 500 1, 400 210 WeII 8
2444 E Louise
Avenue
Active 1991 31 273 1, 200 1,00 221
WeII 9
17550 Shideler
Parkway
Temporarily
Offline
1993 29 282 1, 200 1, 400 221
WeII 10
17400 Shideler
Parkway
Active 2007 15 275 1, 300 1, 700 258
Current Treatment
Arsenic treatment and
chlorine disinfection at
LAWTF. Chlorine injection
possible at well heads in
case of emergency.
Notes:
a) WeII 9 is currently offline due to water quality issues and may be used in the future as an emergency well until water quality issues are addressed to meet drinking water standards.
eki environment
water 3-4
December 2024
EKI C20049. 01
217
Section 3
2024 WSMP Amendment
EXISTING WATER SYSTEM City of Lathrop
3. 2 Water Distribution System Facilities
3. 2. 1 Treated Water Storage Facilities and Booster Pump Stations As seen in Table 3-2, the City has approximately 7. 4 MG of total storage in seven existing ground -level storage tanks. Two additional 1. 0 MG storage tanks are located at the two SSJID Turnouts but are owned and operated by SSJID. The City' stanks are used to help meet system demands during peak hours, provide emergency storage, and provide fire flow storage.
As seen in Table 3-, the City has seven booster pump stations associated with each storage tank and the LAWTF, and two additional BPS at the two SSJID Turnouts. The SSJID Turnout 1 BPS is the only station without backup power. BPS -1 is the only domestic pump station without variable frequency drive pumps.
In total, the City has approximately 21, 660 gpm of existing firm domestic pump capacity ( i.e., without the largest domestic pump at each BPS), and an additional 16, 550 gpm of fire pump capacity. The discharge from the SSJID Turnout 2 is directly pumped to the BPS - 5 and therefore not included in the total firm pumping capacity.
3. 2. Water Distribution Pipelines
The City' s water distribution network consists of approximately 157 miles of pipe ranging from 2 inches to 30 inches in diameter. Table 3-4summarizes the City' s distribution pipelines by diameter. Distribution system pipe sizes are shown spatially on Figure 3-1.
Pipe material is not well documented in the older Historic Lathrop and Crossroads areas, but materials are known to include asbestos cement ( AC) pipe, cast iron pipe, ductile iron pipe ( DIP), and polyvinyl chloride ( PVC) pipe. DIP is used near the LAWTF and the former Well 21 site. Newer areas of the City west of I-5 are exclusively served by PVC pipe, which is the City' scurrent standard pipe material.
3. 2. SCADA System
The City has Supervisory Control and Data Acquisition ( SCADA) system monitoring for all wells, pump stations, storage tanks, the LAWTF and the SSJID turnouts. The system monitors discharge flows, discharge pressures, tank levels, pump speeds, and chlorine residual. Alarms are set for minimum and maximum levels and pressures.
3. Summary of Major Water System Improvements Since 2019 The following major water system improvements were completed since the 2019 WSMP:
BPSs 5 and 6 and Storage Tanks: BPS 5 and 6 and associated storage tanks ( 1. 2 MG and 1. 6 MG, respectively) were constructed in 2018 and 2019 to provide additional storage and flow capacity to the new development at River Islands and Central Lathrop Phase 1 ( Stanford Crossing).
BPS 5 and Tank 5 Site Expansion: The Tank 5 site expansion project, including construction of an additional fire pump of 4, 000 gpm design flow and two new 1. 8 MG water storage tanks ( Tank 5B and Tank 5C) is near completion during the preparation of this master plan.
SSJID Turnout 2: SSJID Turnout 2 was constructed in 2018 with three 2, 000 gpm pumps and one
1. 0 MG tank owned by SSJID.
J Street Improvement Proiect: The previous 8" to 10" pipes on J St between approximately 140 feet west of Avon St and approximately 210 feet east of 5th St were replaced by new 12" PVC pipe. The previous 10" line on Avon St between J St and Sunflower Dr was replaced by new 12" PVC pipe. The previous 12" BPS - 1 discharge line was replaced by new 16" PVC pipe. eki environment
water 3- 5
December 2024
EKI C20049. 01
218
Section 3 2024 WSMP Amendment
EXISTING WATER SYSTEM City of Lathrop
South Harlan Road Improvement Project: A new 8" pipe on South Harlan Road, north of Louise Avenue, was constructed to loop the existing 8 -inch dead- end on South Harlan Road to the 8 -inch pipe on Old Harlan Road.
River Islands Water Infrastructure: Water system improvements for Phases 1, 2A, and parts of 2B of the River Islands Development.
Central Lathrop Stanford Crossing Infrastructure: Water system improvements for the Central Lathrop Stanford Crossing development.
Louise Avenue Water Transmission Main Project: A new 12 -inch transmission line was installed in parallel to the existing 12 -inch transmission line along Louise Avenue from I-5 to Howland Road.
South Lathrop Offsite Backbone Infrastructure: A new 12 -inch transmission line was constructed on Yosemite Avenue between Highway 120 and D' Arcy Parkway.
Backbone Infrastructure, South Lathrop Commerce Center: A new 12 -inch transmission loop was constructed around the South Lathrop Commerce Center.
Murphy Parkway Off -Site Civil Improvement: A new 10 -inch transmission line was constructed on the new development ( Testa Service Distribution Center) at 17100 Murphy Pkwy, Lathrop, CA 95330.
eki environment
water 3- 6
December 2024
EKI C20049. 01
219
Section 3
EXISTING WATER SYSTEM
2024 WSMP Amendment
City of Lathrop
Table 3-2. Existing Treated Water Storage Facilities
Storage Facility
Tank 1
Location
J Street and Ruby Court
Date Constructed
1986
Material
Steel
Capacity
MG)
0. 4
Diameter
feet)
55 Height
ft)
22. 9
MSL Elevation
ft)
15. 0
Tank 2
Howland Road and
D' Arcy Parkway
1993 Steel 1. 0 75 30. 7 17. 5
Tank 3
Tracywood Avenue and
Shadywood Avenue
2003 Steel 1. 0 85 24. 1 15. 0
Tank 4
Brookhurst Boulevard
and Manthey Road
2005 Steel 1.7 100 23. 5 15. 25
Tank 5
Golden Valley Parkway
and W Stewart Rd
2018 Steel 1. 2 106 27. 0 16. 0
Tank 6
Stanford Crossing and
Spartan Way
2021 Steel 1. 6 97 32. 5 12. 0
LAWTF Tank 2112 Louise Avenue 2013 Steel 1.0 92 24. 0 24. 0 Notes:
a) Sources: Draft Water Master Plan, November 2013 and Water Supply Wells Arsenic Reduction Facilities Louise Avenue Water Treatment Facility, CIP Project PW05- 07, January 2013. Asbuilts provided by the City on May 2022. b) Listed water storage facilities do not include the 1.0 MG tanks at SSJID turnout 1 and SSJID Turnout 2, which are owned and operated by SSJID.
eki environment
water 3-7
December 2024
EKI C20049. 01
220
Section 3
EXISTING WATER SYSTEM
2024 WSMP Amendment
City of Lathrop
Table 3-. Treated Water Storage Facility Booster Pump Station Characteristics Variable
Design
Booster Pump Head Frequency Horsepower Installation Standby Pump No. Flow
Station (
gpm) (
ft) Drive ( hp) Date ( b) Power
VFD)
1 1A 1, 800 133 50 1986
V
1FP 1, 050 138 100 1986
2 2A 1, 750 180 V 75 1993
V
2FP 3, 000 116 1993
3 3A 1, 250 142 60 1999
3B V 1, 250 142 V 60 1999
3FP 3, 500 173 266 1999
4 4A 600 130 V 25 2006
V
4B 1, 000 92. 3 60 2006
4C 1, 000 92. 3 60 2006
4D 1, 000 92. 3 60 2006
4FP 2, 000 155 125 2006
5 ( c)
1 2, 000 197 125 2018
V
2 2, 000 197 V 125 2018
3 2, 000 197 V 125 2018
FP1 4, 000 197 250 2018
FP2 4, 000 197 250
Under
Construction
6 ( d)
1 1,50 162 V 60 2019
V
2 1,50 162 V 60 2019
3 1,50 162 V 60 2019
FP 3, 000 162 200 2019
LAWTF
LAWTF1 2, 100 165 V 125 2012
V
LAWTF2 2, 100 165 V 125 2012
LAWTF3 2, 100 165 V 125 2012
LAWTF4 2, 100 165 V 125 2012
SSJID Turnout 1
SSJ1 2, 605 203 V 200 2004
SSJ2 2, 605 203 V 200 2004
SSJ3 2, 605 203 V 200 2004
SSJID Turnout 2
e)
1 2000 30 25 2018
2 2000 30 25 2018 V
3 2000 30 25 2018
Notes:
a) Source: Water Master Plan, December 2019.
b) Date of original installation.
c) Firm pumping capacity at buildout from City of Lathrop Phase I Potable Water Booster Pump station and storage Tank Expansion Plan at River Islands 100% Plans ( PACE, 2022). d) Central Lathrop Specific Plan Tank & Booster Pump Station, dated 2019. ek, environment
water 3- 8
December 2024
EKI C20049. 01
221
Section 3 2024 WSMP Amendment
EXISTING WATER SYSTEM City of Lathrop
Table 3-4. Pipeline Lengths by Diameter
Pipeline Diameter
inches)
2 Length
feet)
2, 788
Length
miles)
0. 53
Percent of Water
System
0. 34%
3 165 0.3 0.2%
4 7, 627 1. 44 0. 92%
6 61,15 11. 67 7. 45%
8 433, 362 82. 08 52. 43%
10 77, 477 14. 67 9. 37%
12 158, 84 30. 09 19. 22%
16 49, 103 9. 30 5. 94%
18 7, 081 1. 34 0. 86%
20 18, 385 3. 48 2.2%
24 9, 557 1. 81 1.6%
30 580 0. 11 0.7%
Total 826, 624 156. 56 100%
Notes:
a) Data includes all active potable water transmission and distribution pipelines present in the geographic information system ( GIS) data provided by the City and updated by EKI.
ekienvironment water 3- 9
December 2024
EKI C20049. 01
222
Section 4 2024 WSMP Amendment
EXISTING AND FUTURE WATER DEMANDS City of Lathrop
4 EXISTING AND FUTURE WATER DEMANDS
The City updated its demand projections as part of this IWRMP Amendment. The following sections summarize the City' s historical and current water demands, water demand projections, and water peaking factors.
4. 1 Current and Historical Water Demand
Table 4-1, Figure 4-1, and Figure 4-2 provide historical context by summarizing the City' s potable water use, service area population, and per capita potable water use for the years 2000 through 2022. Historical potable water use is calculated based on total annual SCWSP water purchases and groundwater production. Total potable water use in 2022 was 5, 277 acre feet ( AF).
Potable water use has generally increased over the past two decades, although significant variations have occurred from year to year and are believed to be associated with changing hydrologic and economic conditions. During the extended drought of 2014-017, the City' s water production decreased dramatically due to the voluntary and mandatory water conservation efforts that were implemented by the City' s water customers. Water production rebounded between 2017 and 2020 as water use restrictions were lifted and new development projects were constructed. However, water use decreased again as a result of the 2021-022 drought. The City' scurrent ( 2022) total potable demand and per capita water demand remain below 2020 levels due to the current drought.
Although population has steadily increased over the past 21 years, the increase in total water demand has been buffered by a general decline in per capita water use since 2004, as shown in Figure 4-2. Specifically, per capita water use dropped to below the City -adopted 2020 Senate Bill x7- 7 (SBx7- 7) Target of 188 gallons per capita per day (GPCD) 2in 2014 and has remained lower than the Target ever since. The City' s current ( 2022) per capita water use is 149 GPCD. While recent declines may be attributed in part to behavioral changes and regulatory mandates during the past and current droughts, the longer -term decline in per capita water use is likely representative of ( 1) new residential development, which has increased population and minimized the portion of per capita water demands associated with nonresidential uses and ( 2) increases in water use efficiency through retrofits of existing properties and the construction of new, water - efficient development.
The City' s potable water demands were quantified in terms of the following water use sectors, which were established based upon the categories assigned to each account in the City' s water billing system: Single Family Residential ( SFR), Multi -Family Residential ( MFR), Commercial, Industrial, Institutional/ Governmental, and Other/ Construction. Additionally, dedicated irrigation accounts were separated into an Irrigation sector, which includes both separate irrigation accounts and those accounts in other sectors that have irrigation sub -meters.
Table 4-2 summarizes the current number of customer service connections in each water use sector. The City currently provides water service to approximately 9,22 residential, commercial, industrial and institutional/ governmental service connections. The SFR and MFR sectors comprise respectively 91% and 4% of all customer service connections in the City. The CII sectors comprise 3% of all customer service The Water Conservation Act of 2009 ( SBx7- 7) required water retailers to set a total GPCD water use reduction target of 20% by year 2020 from a calculated baseline water use. The target is measured in GPCD, which represents the total water use divided by the population, as opposed to Residential GPCD ( R- GPCD), which only includes residential water use divided by the population. The City adopted its 2020 SBx7- 7 target in 2012. ek, environment
water 4-1
December 2024
EKI C20049. 01
223
Section 4 2024 WSMP Amendment
EXISTING AND FUTURE WATER DEMANDS City of Lathrop
connections in the City. The remaining accounts are dedicated irrigation meters and construction/ temporary meters. All the City' s
water services are metered.
In addition to the metered water consumption described above, the City' s potable water demand also includes non -revenue water, including water used for fire hydrant flushing and testing and for water main flushing, as well as distribution system water losses. The volume of non -revenue water is estimated herein by comparing metered water demand ( i.e., consumption) against total water purchases and groundwater production.
Current and historical potable water demands for the customer sectors discussed above are provided in Table 4-3 and on Figure 4- and Figure 4-5. Over the period 2017 through 2022, SFR water use comprised approximately half of all water use in the City ( 48%). Of the metered water consumption, the Industria/ and Irrigation sectors comprised 24% and 15% of the City' s water demands, respectively. Water use in the Commercial ( 3%), Institutional/ Governmental (3%), MFR ( 2%), and Agricultural ( 2%) sectors was relatively minor compared to total water use. The relative percentage of the total potable water demand represented by most sectors remained relatively constant from 2017 through 2022.
The City' s non - revenue water use over this period, as calculated by subtracting metered consumption from production, averaged approximately 1% of total use from 2017 to 2022. This unusually low average and several negative annual water loss volumes recorded during this period are likely indicative of meter errors, and the actual non -revenue water use is likely higher. ek, environment
water 4-2
December 2024
EKI C20049. 01
224
Section 4
EXISTING AND FUTURE WATER DEMANDS
2024 WSMP Amendment
City of Lathrop
Table 4-1. Current and Historical Potable Water Use and Population Year
Potable Water Use
acre feet)
a)
Service Area
Population
b)
Per Capita
Potable Water Use
GPCD) (c)
2000 2, 518 10, 445 215
2001 2, 689 10, 802 222
2002 3, 105 11, 616 239
2003 3,26 12, 089 246
2004 3, 471 12, 482 248
2005 3,72 12, 768 236
2006 3, 640 14, 489 224
2007 4, 076 16, 271 224
2008 4, 528 17, 282 234
2009 4, 214 17, 589 214
2010 3, 672 18, 023 182
2011 3, 798 18, 688 181
2012 4, 332 19, 090 203
2013 4, 686 19, 642 213
2014 4, 008 20, 158 177
2015 3, 445 20, 796 148
2016 3, 646 22, 174 147
2017 4, 168 23, 117 161
2018 4, 551 24, 185 168
2019 4,52 25, 401 156
2020 5, 485 26, 833 182
2021 5, 285 29, 384 161
2022 5, 277 31, 575 149
Notes:
a) Detailed historical and current water demand data from 2011 through 2020 are documented in the City' s 2020 UWMP. The 2021 and 2022 demands are documented in Table 4-2. b) Historical and current population is based on population estimates by the California DOF for the City of Lathrop included in DOF, 2007; DOF, 2012; DOF, 2022, and DOF, 2023. c) Per capita potable water use is calculated by dividing the total annual potable water demand by service area population and the number of days in a year.
eki environment
water 4- 3
December 2024
EKI C20049. 01
225
Section 4 2024 WSMP Amendment
EXISTING AND FUTURE WATER DEMANDS City of Lathrop
Figure 4-1. Current and Historical Potable Water Use and Population 6, 000
5, 000
d
4, 000
a
3, 000
a
a, 2, 000
n
In
0 a
1, 000
0 300
u
w 250
a
ra
E 200
3 150
a
m
c 100
a
Ns
a.
50 IL
0 et Ln LO N CO rn 0 .--I N m V1 lD N oo rn
0 0 0 0 0 0 0 0 00 e - I N N
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
N N NCNINNN N N N N N N N N N N N N N N N
Year
Potable Water Usage - Population
Figure 4-2. Current and Historical Per Capita Potable Water Use O N m ct V1 le) I, CO D1 O .-- I N Cr) in co N co cn O .- 1 N O O O o O e - I .-- 1 ei r -N ei e - I ei ei ei ei N N N O O O o O O O O O O O O O O O O O O
N N N N N N N N N N N N N N N N N N
000
O O O O O N N N N N
Year
35, 000
30, 000
25, 000
20, 000
15, 000
10, 000
5, 000
N
N
O
N
Per Capita Potable Water Use — 2020 SBX7- 7Target ( 188 GPCD) Service
Area
Population
eki environment
water 4-
December 2024
EKI C20049. 01
226
Section 4
EXISTING AND FUTURE WATER DEMANDS
2024 WSMP Amendment
City of Lathrop
Table 4-2. Number of Current ( 2022) Potable Water Services by Sector Water Use Sector 2022
Residential Service Connections
Single Family Residential 9, 028
Multi -Family Residential 387
Subtotal Residential 9, 415
CII Service Connections
Commercial 143
Industrial 53
Institutional/ Governmental 60
Subtotal CII 256
Other Service Connections
Irrigation 223
Other/ Construction 28
Subtotal Other 251
Total Number of Services 9,22
Notes:
a) Number of accounts were based on the December 2022 billing data provided by the City on 25 July 2023.
Figure 4-3. Number of Current Potable Water Services by Sector Multi -Family Residential
Institutional/ Governmental
Commercial
Irrigation
Single Family Residential
Industrial
Other/ Construction
ek, environment
water 4- 5
December 2024
EKI C20049. 01
227
Section 4
EXISTING AND FUTURE WATER DEMANDS
2024 WSMP Amendment
City of Lathrop
Table 4-3. Current and Historical Potable Water Use by Sector Water Use Sector
Potable Water Demand ( acre- feet) (a)
2017 2018 2019 2020 2021 2022
Residential Water Use
Single Family Residential 1, 991 2, 112 2, 136 2, 559 2, 681 2, 696 Multi - Family Residential 76 80 79 99 106 133
Subtotal Residential 2, 067 2, 191 2,15 2, 658 2, 788 2, 829 CI! Water Use
Commercial 155 184 150 132 146 179
Industrial 856 1,43 1,71 1, 206 1, 210 1, 287
Institutional/ Governmental 100 110 94 150 140 146
Subtotal Cll 1,11 1, 437 1, 414 1, 488 1, 497 1, 612
Other Water Use
Irrigation 719 730 664 894 837 815
Agricultural 119 226 212
Other/ Construction 75 157 122 172 146 58
Recycled Water Use ( b) 94) 194)
Subtotal Other 912 1,13 999 1, 066 889 679
Total Water Consumption 4, 090 4, 741 4, 627 5, 211 5, 174 5, 120 Non -revenue Water ( c)
2% 4% 4% 5% 2% 3%
78 190 175 273 111 158
Total Water Demand (d) 4, 168 4, 551 4,52 5, 485 5, 285 5, 277 Notes:
a) Water use data was processed from water billing data provided by the City on 4 August 2022 and 27 April 2023.
b) Recycled water use based on CalSense meter data and subtracted from total water use data. c) Non -revenue water includes water used for fire hydrant flushing and testing, for water main flushing, as well as distribution system water losses. This value is calculated as the difference between metered water consumption and total water production.
d) Total water demand is the sum of metered water consumption and non -revenue water. e) Totals may not add exactly due to rounding.
ekl environment
water 4- 6
December 2024
EKI C20049. 01
228
Section 4
2024 WSMP Amendment
EXISTING AND FUTURE WATER DEMANDS City of Lathrop
Figure 4-. Annual Water Use by Sector: 2017-022
6, 000
5, 000
5 4, 000
Q
ai
D
i
3, 000
ry
Q 2, 000
1, 000
0 2017
Single Family Residential
Industrial
Other/ Construction
2018 2019 2020 2021 2022
Multi - Family Residential ip- Commercial
Institutional/ Governmental • Irrigation
Non -revenue Water • Agricultural
Figure 4-5. Percentage of Total Water Use by Sector: 2017-022 3%
Single Family Residential
Multi - Family Residential
Commercial
Industrial
Institutional/ Governmental
Irrigation
Agricultural
Other/ Construction
Non -revenue Water
ekienvironment water 4-7
December 2024
EKI C20049. 01
229
Section 4 2024 WSMP Amendment
EXISTING AND FUTURE WATER DEMANDS City of Lathrop
4. 2 Water Demand Projections
Potable water demand projections were calculated as the sum of the two major components of future water demands: ( 1) baseline water demand based on the City' s existing potable water demand in 2022, and ( 2) the anticipated potable water demands associated with the future development projects and planning areas post 2022. Components of potable water demand projections are described in the sections below.
4. 2.1 Baseline Potable Water Demand
The baseline water demand is based on the City' s potable demand in 2022. As discussed above, water demand in 2022 was slightly suppressed due to water use restrictions implemented during the 2021-022 drought. However, it is anticipated that the City' s water use efficiency will continue to improve over the long term, driven by its compliance to the State' s upcoming water use efficiency regulations. As such, the water demand in 2022 is considered as a reasonable " baseline".
Baseline water demand does not include water uses by construction and temporary meters and is estimated to be 5, 061 acre- feet per year (AFY).
4. 2. Demand Associated with Planned Development
To estimate demands for future developments, water use factors shown in Table 4- were applied to the anticipated acreages and number of dwelling units associated with each proposed development listed in Table 2-1. As part of this IWRMP Amendment, EKI reviewed City' s water use during 2017 through 2022 to verify and update the water demand factors presented in the City' s 2020 UWMP. The factors assign a unit volume of potable water demand to an individual dwelling unit ( gallons per day per dwelling unit, or, gpd/ du) or to each acre of CI' development ( gallons per day per acre, or, gpd/ ac). The methodology used to develop the factors is described in Appendix A.
Table 4-. Updated Water Demand Factors
Land Use Category
Updated Potable Water Use Factors ( a)
City- wide River Islands
Low Density Residential 330 gpd/ du 315 gpd/ du
Medium Density Residential 250 gpd/ du 235 gpd/ du
High Density Residential 170 gpd/ du
Commercial 1, 550 gpd/ ac
Industrial 1, 200 gpd/ ac
Parks / Public Landscaping 2, 450 gpd/ ac
Schools / Institutional 1, 250 gpd/ ac
The resulting calculation is shown in Table 4-5. Potable water demand associated with planned development also includes 5% non-revenue water.
4. 2.3 Total Projected Potable Water Demand
Table 4-5 summarizes the City' s projected water demand and by development area in five- year increments between 2025 and buildout, based on the City' s projected developments shown in Table 2-1. eki environment
water 4-8
December 2024
EKI C20049. 01
230
Section 4 2024 WSMP Amendment
EXISTING AND FUTURE WATER DEMANDS City of Lathrop
The total projected potable water demand also includes non -revenue water, which is estimated to be 5% of demands. 3The City anticipates that total potable water demand will be 12, 405 AFY by 2045. 3 Non - revenue water is assumed to be 5% consistent with the 2019 WSMP. Actual non -revenue water observed between 2017 and 2022 appears to be unusually low and included negative values, likely due to meter errors. ek, environment
water 4- 9
December 2024
EKI C20049. 01
231
Section 4
EXISTING AND FUTURE WATER DEMANDS
2024 WSMP Amendment
City of Lathrop
Table 4-5. Projected Water Demand by Development Area
Updated Projected New
Land Use Designation
Demand Factor 2025 2030
Central Lathrop - Phase 1
Water Demand ( AFY) (a)
2035 2040 Buildout
Low Density Residential 330 gpd/ du 0 185 282 282 282
High Density Residential 170 gpd/ du 0 47 87 110 110
Commercial 1, 550 gpd/ ac 23 128 128 128 253
New Central Lathrop Phase 1 Demand
Existing Central Lathrop Phase 1 Demand
23 223
359
223
497
223
520
223
734
223
Projected Central Lathrop Phase 1 Demand 246 583 720 744 957 Central Lathrop - Phase 2
Light Industrial / R&D Flex 1, 200 gpd/ ac 121 121 121 121 916 Parks 2, 450 gpd/ ac 0 0 0 0 14
New Central Lathrop Phase 2 Demand
Existing Central Lathrop Phase 2 Demand
121
0 121
0 121
0 121
0 930
0 Projected Central Lathrop Phase 2 Demand 121 121 121 121 930 Mossdale Landing
Low Density Residential 330 gpd/ du 0 0 0 0 24
Commercial 1, 550 gpd/ ac 8 11 11 11 11
Schools 1, 250 gpd/ ac 0 0 0 0 23
New Mossdale Landing Demand
Existing Mossdale Landing Demand
8 660
11 660
11 660
11 660
58 660
Projected Mossdale Landing Demand 668 671 671 671 718
Mossdale Landing East
Low Density Residential 330 gpd/ du 0 14 14 14 14
High Density Residential 170 gpd/ du 0 0 0 0 16
Commercial 1, 550 gpd/ ac 0 12 12 12 12
New Mossdale Land ng East Demand
Existing Mossdale Landing East Demand
0 204
26 204
26 204
26 204
42 204
Projected Mossdale Landing East Demand 204 229 229 229 245 Mossdale Landing South
Medium Density Residential 250 gpd/ du 24 24 24 24 24
Commercial 1, 550 gpd/ ac 0 0 14 14 43
Parks 2, 450 gpd/ ac 0 11 11 11 11
New Mossdale Landing South Demand
Existing Mossdale Landing South Demand
24 49
35 49
49 49
49 49
78 49
Projected Mossdale Landing South Demand 73 85 100 101 127 Mossdale Landing West
Low Density Residential 330 gpd/ du 0 0 306 306 306
New Mossdale Landing West Demand
Existing Mossdale Landing West Demand
0 0
0 0
306
0 306
0 306
0 Projected Mossdale Landing West Demand 0 0 306 306 306 River Islands
Low Density Residential 315 gpd/ du 271 701 1,31 1, 560 1, 560 Medium Density Residential 235 gpd/ du 178 427 675 924 924 High Density Residential 170 gpd/ du 0 266 531 797 797
Commercial 1, 550 gpd/ ac 0 166 332 499 499
Schools 1, 250 gpd/ ac 16 23 31 38 38
Parks and Landscaping Parcels 2, 450 gpd/ ac 9 27 44 62 62 New River Islands Demand
Existing River Islands Demand
473
851
1, 609
851
2, 745
851
3, 880
851
3, 880
851
Projected River Islands Demand 1, 324 2, 460 3, 596 4, 731 4, 731 eki environment
water
December 2024
EKI C20049. 01
232
Section 4
EXISTING AND FUTURE WATER DEMANDS
2024 WSMP Amendment
City of Lathrop
Table 4- 5 (Cont.). Projected Water Demand by Development Area Updated Projected New Water Demand (AFY) (a)
Land Use Designation
Demand Factor
2025 2030 2035 2040 Buildout
South Lathrop
Light Industrial / R&D Flex 1, 200 gpd/ ac 0 90 90 90 134 Office Commercial 1, 550 gpd/ ac 0 15 15 15 17
New South Lathrop Demand
Existing South Lathrop Demand
0 25
105
25 105
25 105
25 151
25 Projected South Lathrop Demand 25 130 130 130 176
Lathrop Gateway
Light Industrial / R&D Flex 1, 200 gpd/ ac 0 89 89 111 111 Office Commercial 1, 550 gpd/ ac 0 89 89 109 109
Open Space 2, 450 gpd/ ac 0 7 7 11 11
Public Landscaping 2, 450 gpd/ ac 0 7 7 31 31
New Lathrop Gateway Demand
Existing Lathrop Gateway Demand
0 27
191
27 191
27 262
27 262
27 Projected Lathrop Gateway Demand 27 218 218 290 290
Crossroads
Industrial 1, 200 gpd/ ac 0 31 31 31 31
Commercial 1, 550 gpd/ ac 0 3 3 3 3
New Crossroads Demand
Existing Crossroads Demand
0 582
34 582
34 582
34 582
34 582
Projected Crossroads Demand 582 616 616 616 616
Historic Lathrop and Other Development Areas
Low Density Residential 330 gpd/ du 0 4 7 9 19
Medium Density Residential 250 gpd/ du 8 15 22 29 61
High Density Residential 170 gpd/ du 0 0 0 0 9
Commercial 1, 550 gpd/ ac 38 62 62 62 76
Industrial 1, 200 gpd/ ac 24 24 24 24 56
New Historic Lathrop / Other Demand
Existing Historic Lathrop / Other Demand
70 2, 437
105
2, 437
115
2, 437
124
2, 437
222
2, 437
Projected Historic Lathrop / Other Demand 2, 507 2, 542 2, 552 2, 561 2, 659 Sharpe Army Depot ( b)
AAFES 16 16 16 16 16
California Military Department 41 41 41 41 41
New Sharpe Army Depot Demand
Existing Sharpe Army Depot Demand
56 56
3 3
56 3
56 3
56 3
Projected Sharpe Army Depot Demand 59 59 59 59 59
Notes:
a) Projected residential water demand calculated as the total number of projected residential dwelling units ( Table 2-1) multiplied by the applicable water demand factor (Table 4-4). Projected non- residential water demand calculated as the total projected acreage (Table 2- 1) multiplied by the applicable water demand factor ( Table 4-). b) Water demand for the AAFES facility is estimated using historical metered consumption. Water demand for the California Military Department based on projections provided on 12 April 2018. c) Totals may not add exactly due to rounding.
eki environment
water
December 2024
EKI C20049. 01
233
Section 4 2024 WSMP Amendment
EXISTING AND FUTURE WATER DEMANDS City of Lathrop
4. 3 Peak Demands
EKI reviewed the City' s historical water production data to identify the peaking factors relative to average day demand ( ADD) that best estimate maximum month demand ( MMD), maximum day demand ( MDD), and peak hour demand ( PHD). To determine the MMD peaking factor, EKI evaluated the City' s monthly production data. Monthly production between January 2005 and December 2022 is shown on Figure 4-6.
Citywide monthly production exhibits seasonal trends with peak flows occurring during the summer months, when irrigation demands are high, and lower flows in winter months, when there are minimal irrigation demands. Figure 4-6 shows that peak flows declined significantly from previous years in the summer of 2015, after the SWRCB imposed mandatory restrictions. Peak flows began to rebound in summer of 2016 and continued as of December 2022, as the restrictions were lifted.
EKI reviewed data collected from the City' sSCADA system to determine the MDD and PHD peaking factors.
The City provided flow data from each of its supply sources ( LAWTF and SSJID Turnouts 1 and 2) and elevation data from each of its storage tanks in 30 -minute increments between June 2013 and August 2016 and the flow data in 5 -minutes increments between 1 January 2017 to 20 July 2022. Using this data, EKI calculated Citywide hourly production by summing the flow into the system from each source and the change in storage in each tank.
Table 4-6 lists the historical ADDs and MMDs between 2005 and 2021 and the MDD and PHD between 2013 and 2021. 4Also, listed in Table 4- 6 are the calculated peaking factors in each year.
Based on the recent water use pattern, EKI updated the peaking factors to estimate existing and future peak flows, as follows, based on the average factors between 2013 and 2022:
MMD Peaking Factor = 1. 5 x ADD
MDD Peaking Factor = 1. 7 x ADD
PHD Peaking Factor = 2. 6 x ADD
The application of these peaking factors to assess system capacity and performance is described in Section 6.
4 2022 ADD was calculated separately based on annual water production data due to SCADA availability. ekienvironment water 4- 12
December 2024
EKI C20049. 01
234
Section 4 2024 WSMP Amendment
EXISTING AND FUTURE WATER DEMANDS City of Lathrop
Figure 4-6. City of Lathrop Monthly Water Production
8, 000,00
7, 000,00
6, 000,00
a
5, 000,00
a
0. c 4, 000,00
IT
3, 000,00
2, 000,00
1, 000,00
o
L. r1 lD N o0 O1 O N M Tr u1 IX) r-- CO O1 O .- 1 N m
O O O O O a - I c -I a- I - ti ,— I ,— I ,— I a - I N N N N
C C C C C C C C C C C C C C C C C C C
CO CD co Co ro CD CO ca CO CO co CO co CO co co CO CO CO 4,— Potable Water Production 12 -Month Running Ave. Water Production eki environment
water 4- 13
December 2024
EKI C20049. 01
235
Section 4
EXISTING AND FUTURE WATER DEMANDS
2024 WSMP Amendment
City of Lathrop
Table 4-6. Historical Potable Water Peak Demands and Peaking Factors Updated
2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 Avg. Peaking Factor
a)
Demands ( MGD)
ADD ( b) (c) 4. 18 3. 58 3. 08 3. 19 3. 73 4. 06 4. 06 4. 71 4. 73 4. 71 3. 79 MMD (b)( c) 6. 04 5. 45 3. 94 4. 81 5.2 5. 99 6. 91 6.9 6. 48 5. 65 MDD (d)( e) 6. 80 6. 49 4. 66 5.3 6. 32 6. 85 8. 08 7. 19 7. 39 6. 59 PHD ( e)( f) 14.7 9. 05 7. 91 8. 75 8.0 10. 0 10. 9. 83 Peaking Factors (-)
MMD to ADD 1. 44 1. 52 1. 28 1. 51 1. 48 1. 47 1. 47 1. 41 1. 38 1. 50 1. 5 MDD to ADD 1. 63 1. 82 1. 51 1. 73 1. 69 1. 69 1. 71 1. 52 1. 57 1. 65 1. 7 PHD to ADD 3.9 2. 53 2. 57 2. 74 2. 36 2. 12 2. 14 2. 55 2. 6 Notes:
a) IWRMP Amendment peaking factors selected based on averages rounded up to the nearest tenth. b) ADD and MMD are based on the monthly production data provided by the City. c) ADD for 2022 was calculated based on the City' s provided annual water production from groundwater wells and SSJID turnout. MDD, MMD, and PHD were derived from the SCADA data recorded from January 1st through July 20th. Taking into consideration that the City' s historical MMD tends to occur between June and August ( Note (e)), and considering the data available to EKI, this analysis assumed that MMD occurred in June 2022. Subsequently, MDD was observed on June 29, 2022. d) MDD and PHD calculated from the City provided SCADA flow data from each of its supply sources ( LAWTF, Well 21 WTF, and the SSJID Turnout L1) and elevation data from each of its storage tanks in 30 -minute increments between June 2013 and August 2016 and 5 -minute increments between January 2017 to December 2021. For the periods of 2019 and 2020, SSJID flow reports were used due to lack of SCADA data in the temporary SSJID turnout. The 2018 SCADA data appeared to be erroneous and not included in the peaking factor analysis.
MDDs for 2013 to 2016 were observed on 11 July 2013, 13 June 2014, 23 June 2015, and 27 July 2016 respectively. MDD for 2017 and 2021 were observed on 1 August 2017 and July 2021, respectively.
PHD for 2013 to 2016, 2017, and 2021 is equal to the peak hourly demand during the maximum demand days listed in Note ( d). PHD factors for 2019 and 2020 were not able to be calculated due to the lack of SCADA data in the temporary SSJID turnout.
e)
f)
eki environment
water 4- 14
December 2024
EKI C20049. 01
236
Section 5 2024 WSMP Amendment
WATER SYSTEM SUPPLIES City of Lathrop
5 WATER SYSTEM SUPPLIES
The City obtains water from both imported surface water and local groundwater sources. The City receives Stanislaus River water through the SCWSP that is operated by the SSJID and discussed' in Section 5. 1. The City also owns and operates five groundwater production wells, discussed in Section 5. 2. The City' ssurface water and groundwater production over the period 2017 through 2022 is summarized in Table 5- 1 and Figure 5-1. Due to the relatively high cost of SCWSP water, the City has historically relied upon its groundwater wells as the primary source of supply.
The City' s annual water production increased from 4, 168 AF in 2017 to 5, 277 AF in 2022 as a result of development growth and rebound from the 2014-017 drought. Surface water production ( i.e., SCWSP purchases) steadily increased from 921 AF in 2017 to 3, 866 AF in 2022. At the same time, the City reduced its groundwater production from 3, 247 AF or 78% of its total supplies in 2017 to 1, 411 or 27% in 2022 due to groundwater quality concerns. The City' s current and potential future water supplies are further described in the following sections.
Table 5-1. Current and Historical Potable Water Supply
Annual Production ( acre- feet) (a)
Potable Water Source 2017 2018 2019 2020 2021 2022
Surface Water
SCWSP 921 1, 946 2, 892 3, 429 2, 401 3, 866
Percentage of Supply 22% 43% 65% 63% 45% 73%
Groundwater Production
Production Wells ( b) 3, 247 2, 605 1, 560 2, 055 2, 884 1, 411 Percentage of Supply 78% 57% 35% 37% 55% 27%
Total 4, 168 4, 551 4,52 5, 485 5, 285 5, 277
Notes:
a) Production data from 2017 to 2020 were obtained from the 2020 UWMP and others were provided by the City in April and May 2022 and May 2023. eki environment
water 5- 1
December 2024
EKI C20049. 01
237
Section 5
WATER SYSTEM SUPPLIES
2024 WSMP Amendment
City of Lathrop
Annual
Potable
Water
Supply (
feet) acre6, 000
5, 000
4, 000
3, 000
2, 000
1, 000
0 Figure 5-1. Current and Historical Potable Water Supply 2016 2017 2018 2019 2020 2021 2022
Year
O Surface Water 0 Groundwater Production
5. 1 Imported Surface Water
The City purchases imported surface water from SSJID through the SCWSP, which supplies Stanislaus River water. Information related to the contractual entitlements and treatment processes for the surface water source is detailed further in the City' s 2020 UWMP ( EKI, 2021a). The reliability of this water supply is discussed in Section 5.1.
The SCWSP is a partnership between the City, SSJID, and the cities of Manteca, Tracy, and Escalon. 5The SCWSP water supply is based on SSJID' ssenior, pre -1914 appropriative water rights to the Stanislaus River, a tributary of the San Joaquin River, coupled with a 1988 agreement with the United States Bureau of Reclamation ( USBR) to store water in the New Melones Reservoir. 6The SCWSP was planned to be implemented in two phases. Phase I was completed in 2005 with a total capacity of 31, 500 AFY. Per SSJID' s 2020 UWMP, Phase II is anticipated to be completed before 2040 and will increase the SCWSP' s capacity
to approximately 43, 090 AFY ( EKI, 2021b).
The 1995 Water Supply Development Agreement between the City and SSJID provided the City with a Phase I allocation of 8, 007 AFY and a total allocation of 11, 791 AFY after completion of Phase II. In August 5 The City of Escalon is under contract to purchase water from the SCWSP but has not yet constructed a pipeline to convey the water to its facilities.
6 This agreement recognized and protected SSJID' s senior water rights on the Stanislaus River, because those rights could potentially be affected by the USBR' s
operation of the New Melones Reservoir as part of the Central Valley Project. The agreement entitles the senior water rights holders, SSJID and Oakdale Irrigation District, to access up to 600, 00 AFY of water from New Melones Reservoir in years in which inflow to the reservoir exceeds 600, 00 AF.
SSJID' sshare of this allotment is 300, 00 AF. In years in which inflow does not meet this threshold, the entitlement is reduced based on a pre -determined formula.
ekienvironment water 5-2
December 2024
EKI C20049. 01
238
Section 5 2024 WSMP Amendment
WATER SYSTEM SUPPLIES City of Lathrop
2013, the City sold 1,20 AFY of SCWSP water to the City of Tracy.' Therefore, the City' sremaining SSJID allocation is 6, 887 AFY for Phase I and a total of 10, 671 AFY after completion of Phase II.
The SCWSP transmission system has been designed to deliver seasonal peak flows to each City through a transmission pipeline to turnout facilities. The transmission system is currently operated by gravity flow.
In Phase II, a treated water pump station will be installed at the DGWTP to deliver pumped flows. The SCWSP delivers flows to Lathrop at two locations:
The turnout at Lathrop Road, east of McKinley Avenue ( Lathrop SSJID Turnout 1); and The turnout at Stewart Road, west of Manthey Road ( Lathrop SSJID Turnout 2).
The City' sSSJID Turnouts 1 and 2 supply Lathrop' s allocated Phase 1 peak flows. Lathrop SSJID Turnout 2 will be expanded in the future to deliver Lathrop' sPhase II peak allocation. The planned capacity of each Lathrop turnout according to the SSJID SCWSP Basis of Design Report ( Black & Veatch, 2002), modified to account for the Tracy sale, is listed in Table 5-2.
Table 5-2. Lathrop SSJID Turnouts — Basis of Design
Phase 1 Flows Phase 2 Flows
Cumulative)
AFY) ( MGD) ( AFY) ( MGD)
Lathrop SSJID Design Rows
Contractual Allocation 8, 007 7. 1 11, 791 10. 5
Sale to City of Tracy ( b) 1,20 1. 0 1,20 1. 0
Remaining Allocation 6, 887 6. 1 10, 671 9. 5
Peaking Factors 2. 1 2. 0
Remaining Peak Flow 14, 462 12. 9 21, 342 19.
Lathrop Design Turnout Capacity
Lathrop SSJID Turnout 1 8, 401 7. 5 8, 401 7. 5
Lathrop SSJID Turnout 2 ( c) 6, 061 5. 4 12, 938 11. 6
Notes:
a) Source: South San Joaquin irrigation District South County Water Supply Program Basis of Design Report ( Black and Veatch, 2002).
b) The City sold 1,20 AFY ( 1 MGD) of its Phase 1 SSJID allocation to the City of Tracy in 2013. c) Turnout design flow based on SSJID SCWSP Basis of Design, less the sale to the City of Tracy.
Lathrop - Tracy Purchase, Sale and Amendment Agreement," dated 6 August 2013. eki environment
water 5- 3
December 2024
EKI C20049. 01
239
San Joaquin Valley
Tracy Subbasin
DWR #5- 022. 15)
113LUil
Highway
J City Limit
DWR Groundwater Basins
5- 22. 01 Eastern San Joaquin Subbasin
Q 5- 22. 15 Tracy Subbasin
Other ( Subbasin or Basin)
Infrastructure Features
W Production Well
Water Treatment Facility
o SSJID Turnout
Abbreviations
CASGEM = California Statewide Groundwater Elevation
Monitoring Program
DWR = California Department of Water Resources
LAWfF = Louise Avenue Water Treatment Facility
SSJID = South San Joaquin Irrigation District
WTF = Water Treatment Facility
Notes
1. All locations are approximate.
Sources
1. DWR groundwater basins are based on the boundaries
defined in California' s Groundwater, Bulletin 118- 2016 Update.
2. Basemap: Esri' s World Reference and World Terrain
Base, accessed 16 January 2024.
N
0 4, 000 8, 000
Water Supply Infrastructure
Wet. rSystem Mester Plen Amendment
Cay of Lathrop
Lathrop, CA
ek
I environment DecemberC200490101
water Figure 5- 2
240
Section 5 2024 WSMP Amendment
WATER SYSTEM SUPPLIES City of Lathrop
5. 2 Groundwater
The City only overlies the Tracy Groundwater Subbasin ( Department of Water Resources [ DWR] 5- 22. 15) of the San Joaquin Valley Groundwater Basin ( DWR 5-22), as a result of DWR' s approval on the Basin Boundary Modification Request, dated February 11, 2019. The Basin Boundary Modification incorporated all of the City in the Tracy Subbasin and removed the City from the Eastern San Joaquin Groundwater Subbasin ( DWR 5- 22. 01). The groundwater basin and subbasin areas underlying the City and the locations of the City' s production wells are shown on Figure 5-3.
The Tracy Subbasin is designated as a Medium priority basin by DWR and is therefore subject to the Sustainable Groundwater Management Act ( SGMA). In the Tracy Subbasin, six Groundwater Sustainability Agencies ( GSAs), including Byron -Bethany Irrigation District ( BBID), Banta- Carbona Irrigation District BCID), the City of Tracy, the City of Lathrop, San Joaquin County, and Stewart Tract, worked cooperatively and were awarded a DWR Grant to develop the Tracy Groundwater Sustainability Plan ( GSP). The GSP for the Tracy Subbasin was completed in November 2021 and will be updated every 5 years as additional information becomes available. The chapters of the GSP can be found on the Tracy Subbasin website:
https:// tracysubbasin. org/ gsp- chapters/.
As discussed in Section 3. 1., the City currently operates five municipal groundwater supply wells: Wells 6, 7, 8, 9, and 10. Well 9 is currently offline due to water quality issues. Groundwater from Wells 6, 7, 8, 9 when operating), and 10 is treated to remove arsenic at the LAWTF, which came online in 2012. The City currently has no plans to install additional groundwater wells or expand its groundwater production.
However, the City is actively exploring treatment options to meet emerging water quality regulations which will facilitate bringing Well 9 back online, as well as groundwater - surface water conjunctive use and/ or Aquifer Storage and Recovery ( ASR).
Information regarding the City' sgroundwater production wells are summarized in Table 3- 1 and Table 5-3.
The combined maximum pumping capacity of the City' s
wells ( including Well 9) is 7, 250 gpm, which is
higher than the treatment capacity of the LAWTF ( 6, 250 gpm). However, for the purposes of this evaluation, it is assumed that Wells 6, 7, 8, and 10 are pumped at 50% of their maximum capacity on an annual basis. Given this supply assumption, the City' scurrent annual groundwater supply capacity is equivalent to approximately 4, 720 AFY. As described in Section 5. 6, an annual pumping of approximately 500 AFY from WeII 9 is assumed to be necessary to hydraulically control PFAS in groundwater sourcing from the south of the City' swells. As such, it is assumed that future reactivation of Well 9 with PFAS treatment will add another 500 AFY to the City' s annual groundwater supply yield for a total of 5, 220 AFY.
Qki environment
G & water 5-
December 2024
EKI C20049. 01
241
Section 5
WATER SYSTEM SUPPLIES
2024 WSMP Amendment
City of Lathrop
Table 5-3. Groundwater Production Well Capacities and Annual Yields Groundwater Wells (a)
Existing Maximum Pumping Capacity
Measured Flow Rate Estimated Annual Yield ( b)
gpm) ( AFY)
Well 6 1, 650 1, 330
Well 7 1, 400 1,30
Well 8 1,00 890
Well 10 1, 700 1, 370
Total Exiting Groundwater Capacity 5, 850 4, 720
Well 9 1, 400 500 ( c)
Total Future Groundwater Capacity 7, 250 (d) 5, 220
Notes:
a) Well 21, currently inactive, is not listed above. The City currently has no plans or designs underway to bring it back on- lie due to water quality issues associated with the well ( including PFAS issue). b) Assumes wells are operated at 50% maximum capacity on an annual basis except for Well 9. c) It is assumed that Well 9 will be operated in the future with an annual production rate of 500 AFY to control migration of groundwater with higher concentrations of PFAS. d) Maximum capacity of LAWTF is 6, 250 gpm. Estimated annual yield assumes that annual yield of Wells 6- 10 is not limited by LAWTF capacity on an annual basis.
5. 3 Total Water Supplies
The City' s projected potable water supply entitlements are summarized in Table 5-4 and Figure 5-3. The values presented in this table reflect the City' s contractual allotments from the SCWSP and the City' s current and planned future groundwater production. The actual availability of these water supplies depends on several factors and is discussed in detail in Section 5. ek, environment
water 5-6
December 2024
EKI C20049. 01
242
Section 5
WATER SYSTEM SUPPLIES
2024 WSMP Amendment
City of Lathrop
Table 5-4. Current and Projected Potable Water Supply Entitlements Potable Water Water Right or
Source Contract Reliability 2023 2025 2030 2035 2040 2045 Current Supplies
SCWSP SSJID Contract ( a) Pre -1914 6, 887 6, 887 6, 887 6, 887 6, 887 6, 887 Groundwater b) 4, 720 4, 720 4, 720 4, 720 4, 720 4, 720 Anticipated Future Supplies
SCWSP SSJID Contract ( c) Pre -1914 3, 784 3, 784
Groundwater d) 500 500 500 500 500
Total 11, 607 12,07 12,07 12,07 15, 891 15, 891
Notes:
a) The City' stotal Phase I allotment of SCWSP water, following the 2013 sale to the City of Tracy of 1,20 AFY, is 6, 887 AFY.
b) Reflects the City' s firm groundwater capacity, without Well 9. c) The City' s total Phase I & II allotment of SCWSP water, following the 2013 sale to the City of Tracy, is 10, 671 AFY.
d) it is anticipated that Well 9 will be brought online in 2025 with completion of future PFAS treatment with an annual production rate of 500 AFY.
18, 000
16, 000
14, 000
cu
12, 000
to
J10000
a`, 8, 000
co
To 6, 000
a 4, 000
2, 000
0 Figure 5-3. Current and Projected Potable Water Supply Entitlements 2023 2025 2030
Year
2035 2040 2045
Groundwater ( Future) SCWSP ( Phase II) Groundwater ( Current) D SCWSP ( Phase I) eki environment
water 5-7
December 2024
EKI C20049. 01
243
Section 5 2024 WSMP Amendment
WATER SYSTEM SUPPLIES City of Lathrop
5. 4 Water Supply Reliability
This section describes the constraints on the City' s potable water supply sources, as well as the management strategies that the City has employed or will employ to address these constraints. This section also provides an estimate of the supply volumes available to the City and the corresponding supply and demand reliability assessments in normal years, single dry years, and multiple dry year periods.
5. 4.1 Projected Supply Reliability by Source
The following sections describe the projected reliability of each of the City' s water supplies, including the water supply from SCWSP and groundwater production.
5. 4.1. Surface Water Supply Reliability
The City has access to 6, 887 AFY of Stanislaus River water provided by the SCWSP ( see Section 5. 1.).
Phase II of the SCWSP is anticipated to increase the City' s allocation to 10, 671 AFY by 2040. Due to the seniority of the water rights underlying the SCWSP, SSJID' s pre -1914 appropriative rights to Stanislaus
River water, the City has historically assigned a high reliability to SCWSP water.
However, the future reliability of the City' sfull SCWSP allocation is potentially uncertain due to recent planning efforts by the SWRCB. In December 2018, the SWRCB adopted amendments to the Water Quality Control Plan for the San Francisco Bay/ Sacramento- San Joaquin Delta Estuary ( Bay -Delta Plan Amendment). The adopted changes include increasing flows on three San Joaquin River tributaries ( the Stanislaus, Merced, and Tuolumne Rivers) and the Bay -Delta, with a range of 30% to 50% depending on
biological conditions from February to June in every year type. The SWRCB also approved a framework for accepting voluntary agreements to pursue a combination of flow and " non -flow" measures that improve conditions for fish and wildlife where allowances for reduced river flows may be developed.
Oakdale Irrigation District ( OID) and SSJID began voluntary negotiations on the Stanislaus River prior to adoption of the Bay -Delta Plan Amendment ( OID and SSJID, 2019). On 29 March 2022, a Memorandum of Understanding ( MOU) was signed by the SWRCB and multiple water supply agencies to work to settle litigation over endangered species protections in the Sacramento - San Joaquin Delta. The MOU outlines broad areas of agreement and anticipates the need for further negotiations to develop detailed implementation agreements. OID and SSJID are not among the signatories of the MOU, however, additional parties have been added to the MOU as agreements move forward in more watersheds.
The Lower San Joaquin River flow and southern Sacramento - San Joaquin Delta salinity updates to the Bay - Delta Plan Amendment are not self -implementing and require addition actions by the State ( SWRCB, 2022). Uncertainties including difficult legal process ahead and considerations of senior water rights are challenging the implementation of the Bay -Delta Plan Amendment, which included significant changes and could result in significant surface water cutbacks. SSJID presented its water reliability analysis assuming that the Bay -Delta Plan Amendment will not be implemented in its 2020 UWMP ( EKI, 2020b).
As a retail agency, the City relies on SSJID for the reliability projections. Consistent with SSJID' s approach,
this Water Service Reliability and Drought Risk Assessment section of the City' s 2020 UWMP presents results for the SCWSP water reliability assessment assuming that the Bay -Delta Plan Amendment will not be implemented.
SSJID anticipates that 100% of the contract volumes ( 31, 522 AFY during Phase I and 43, 090 AFY during Phase II) will be available to SCWSP participants in normal years. In single dry years, SSJID projects that SCWSP participants will receive 79% to 99% of their contract volumes based upon the analog of SSJID' s water supplies in 1977. In a five- year, multiple dry year scenario, SSJID projects that SCWSP participants will receive 79% to 99% of their contract volumes during the third and fourth dry years, while 100% of the eki environment
water 5-8
December 2024
EKI C20049. 01
244
Section 5
WATER SYSTEM SUPPLIES
2024 WSMP Amendment
City of Lathrop
contract volumes will be available in the remaining years. The multiple dry year supply reliability is based on the analog of SSJID' s water supplies over the period of 2012 through 2016.
Section 8(a) of the 1995 Water Supply Development Agreement stipulates that reductions in SCWSP deliveries shall be distributed pro -
allotment. Therefore, it is assumed that
rata
the
among
City' s
the
supply
SCWSP
availability
participants
will be
based
proportionate
upon each
to
participant' s
the SCWSP
supply availability presented in Table 5-. The City' s projected SSJID supply in normal years, single dry years, and multiple dry years is summarized in Table 5-6.
Table 5-. Projected SCWSP Supply Availability
Estimated Supply and Demand
Year Type
2025 2030 2035
AFY)
2040 2045
Average Year 31, 522 31, 522 31, 522 43, 090 43, 090
Single - Dry Year 26, 448 28, 962 31, 475 33, 988 36, 501 Multiple Dry Years - First Year 31, 522 31, 522 31, 522 43, 090 43, 090 Multiple Dry Years - Second Year 31, 522 31, 522 31, 522 43, 090 43, 090 Multiple Dry Years - Third Year 26, 448 28, 962 31, 475 33, 988 36, 501 Multiple Dry Years - Fourth Year 26, 448 28, 962 31, 475 33, 988 36, 501 Multiple Dry Years - Fifth Year 31, 522 31, 522 31, 522 43, 090 43, 090 Notes:
a) Source: City of Lathrop 2020 Urban Water Management Plan Table 7-1.
Table 5-6. Projected SCWSP Supply Available to City of Lathrop Year Type
2025
Estimated Supply and Demand ( AFY)
2030 2035 2040 2045
Average Year 6, 887 6, 887 6, 887 10, 761 10, 761
Single -Dry Year 5, 778 6, 328 6, 877 8, 417 9, 039
Multiple Dry Years - First Year 6, 887 6, 887 6, 887 10, 761 10, 761 Multiple Dry Years - Second Year 6, 887 6, 887 6, 887 10, 761 10, 761 Multiple Dry Years - Third Year 5, 778 6, 328 6, 877 8, 417 9, 039 Multiple Dry Years - Fourth Year 5, 778 6, 328 6, 877 8, 417 9, 039 Multiple Dry Years - Fifth Year 6, 887 6, 887 6, 887 10, 761 10, 761 Notes:
a) Source: City of Lathrop 2020 Urban Water Management Plan Table 7-2. eki environment
water 5- 9
December 2024
EKI C20049. 01
245
Section 5 2024 WSMP Amendment
WATER SYSTEM SUPPLIES City of Lathrop
5. 4.1.2 Groundwater Supply Reliability
The City currently relies upon groundwater production from its five active wells ( Wells 6 through 10) to meet its demands. The City' s ability to utilize its existing groundwater wells within the Tracy Subbasin is not likely be affected by SGMA8. It is anticipated that the future GSP will not require the City to limit groundwater production to maintain a sustainable groundwater budget. Based on the available information, it is anticipated that 100% of the City' scurrent estimated groundwater yield is available for the planning horizon of this Plan.
Groundwater production has historically been constrained by the City' s well production and treatment
capacity, as well as by the groundwater quality. Considering the current water quality constraints discussed below, the City is anticipating that Well 9 will remain offline until 2025 when PFAS treatment is added to the LAWTF as described in Section 5. 6.2. The groundwater supplies from Wells 6 through 10 are expected to be 100% reliable and available during all year types at the volumes shown in Table 5-3.
5. 4.1.3 Groundwater Quality
One of the biggest threats to the City' s ability to use groundwater to meet potable water demands is water quality. The primary water quality concerns in the City' s groundwater are arsenic, manganese, uranium, total dissolved solids ( TDS), groundwater contamination from industrial processes, and per- and polyfluoroalkyl substances ( PFAS).
5. 4.1.Arsenic and Uranium
As discussed in Section 5. 2.3., the City' s groundwater supplies have been limited by groundwater quality constraints. Wells 6 through 10 are currently treated for arsenic at LAWTF to reduce concentrations below the maximum contaminant level ( MCL) of 0.10 milligrams per liter (mg/ L). The City' sinactive Well 21 also experienced elevated concentrations of arsenic and uranium and is assumed to remain inactive in the future.
The presence of arsenic and uranium in groundwater underlying the City impacts the reliability of the City' s groundwater supply. Expansion of groundwater production in the future is limited by the costs associated with treatment and the availability of adequate supplies to conduct blending.
5. 4.1. Total Dissolved Solids
The City' s groundwater supply reliability is also impacted by the migration of groundwater with TDS concentrations in excess of the secondary MCL of 500 mg/ L. Wells 6 through 10 are located immediately east of groundwater with high TDS concentrations, based on water quality data from City wells and sampling and analysis data from both shallow and deep monitoring wells collected by private entities ( SGI, 2008). Previous studies have indicated that TDS concentrations may be higher in the vicinity of Well 21 than in Wells 6 through 10. In September 2014, TDS concentrations in WeII 9 and Well 10 ranged from 270 mg/ Lto 310 mg/ L (UNICO Engineering, 2015). 9During the same sampling event, concentrations of 8 The final Tracy Subbasin GSP anticipated an increasing groundwater production from 7, 020 AFY in 2020 to 8, 483 AFY in buildout, or beyond 2040. (GEI, 2021).
9 These values are generally confirmed by the City' s Consumer Confidence Reports for 2014 and 2015, where TDS concentrations in groundwater ranged from 280 mg/ Lto 387 mg/ L. Since WeII 21 was inactive during this period, these values are representative of water quality within Wells 6 through 10. ekienvironment water 5- 10
December 2024
EKI C20049. 01
246
Section 5 2024 WSMP Amendment
WATER SYSTEM SUPPLIES City of Lathrop
TDS within Well 21 ranged from 630 mg/ Lto 660 mg/ L. 10 The City has historically investigated the option of drilling a new wellfield near Well 21 and determined that it would not be feasible due to the potential for expanded pumping to induce the migration of high TDS water.
5. 4.1.6 Industrial Contamination
Groundwater contamination has been identified at several locations in the City due to industrial processes. Contamination plumes are associated with pollution from Sharpe Army Depot and the former Occidental Chemical Corporation (OCC) site."
Contamination of groundwater at the Sharpe Army Depot consists primarily of trichloroethene, tetrachloroethene, and cis- 1,2- dichloroethene. The plume is located at depths of approximately 50 to 150 feet below ground surface ( ft bgs). Due to concerns of potential contamination from the plume, the City abandoned Well 5 and constructed Well 10 as a replacement well. Three groundwater extraction and treatment systems located at Sharpe Army Depot are used to treat existing groundwater contamination RBF, 2009).
The OCC plume consists primarily of the pesticides 1, 2- dibromo- 3- chloropropane ( DBCP) and ethylene dibromide ( EDB), and the chemical solvent sulfolane. The OCC has been conducting investigation and remediation activities at the site since 1979, and a groundwater remedial system has been in place since 1982. The groundwater remedial system consists of extraction and injection wells as well as granular activated carbon and aeration treatment. Treated water is then re - injected into the confined aquifer beneath the Corcoran Clay layer, which is located between 230 ft bgs and 300 ft bgs.
To help prevent a sulfolane containment plume originating from the former OCC site from impacting the City' s groundwater supply, the City temporarily reduced its groundwater production and significantly limited groundwater production between 2018 and 2020. Efforts to improve the OCC groundwater extraction and treatment system were completed in March 2020. The City restarted Wells 6, 7, 8, and 10 and the LAWTF beginning in April of 2020. And the City has been continuously monitoring for sulfolane in its groundwater wells.
5. 4.1.7 Nitrate
Nitrate concentrations detected at Well 10 had historically shown increasing trends in 2020. During April and November 2020, nitrate ( as nitrogen) at WeII 10 was detected at 8. 1 mg/ Land 7. 5 mg/ L, respectively, approaching the MCL of 10 mg/ L. Since then, in response to this issue, the City has been closely monitoring for nitrate in WeII 10 at least once per quarter and evaluating the possible contaminant source. From June 2021 to September 2023, the monitoring results for WeII 10 showed the nitrate concentrations decreased to 1. 4 mg/ L — 4. 9 mg/ L, above the SCWRCB required reporting level of 0. 4 mg/ L but significantly lower than the MCL.
io Samples were also collected in two private wells in the vicinity of WeII 21. Concentrations of TDS in these wells ranged from 500 mg/ Lto 570 mg/ L.
11 The OCC site is now owned by J. R. Simplot.
ek, environment
water 5- 11
December 2024
EKI C20049. 01
247
Section 5 2024 WSMP Amendment
WATER SYSTEM SUPPLIES City of Lathrop
5. 4.1.8 Per- and Polyfluoroalkyl Substances ( PFAS)
PFAS is a group of emerging man-ade contaminants that were used in firefighting foam, protective coatings, and stain and water- resistant products until the 2000s. The current regulatory setting for PFAS is as follows:
The SWRCB Division of Drinking Water ( DDW) established drinking water Notification Levels ( NLs) and Response Levels ( RLs) for PFOA and PFOS12. Under the authority of Health and Safety Code section 116400, detections above the NL require agencies to notify the governing body for the areas where the water has been served within 30 days of receiving verified test results. If the RL is exceeded in drinking water provided to consumers, DDW recommends that the water agency remove the water source from service or provide treatment.
On March 14, 2023, the U. S. Environmental Protection Agency ( EPA) proposed federal MCLs for six PFAS compounds at ( 1) 4. 0 ppt for PFOA, (2) 4. 0 ppt for PFOS, (3) and a Hazard Index of 1. 0 calculated based on the concentrations of erfluorononanoic acid ( PFNA), hexafluoropropylene oxide dimer acid ( HFPO- DA, commonly known as GenX Chemicals), perfluorohexane sulfonic acid PFHxS), and perfluorobutane sulfonic acid ( PFBS). 13 The proposed MCLs are anticipated to be promulgated in early 2024 and effective in early 2027 ( U. S. EPA, 2023).
In response to the EPA' s Third Unregulated Contaminant Monitoring Rule ( UCMR3), the City of Lathrop sampled its supply sources for a suite of contaminants including six PFAS in 2013 and 2014. PFOA and PFOS were detected in groundwater samples collected from City' s Well 21 in April and October 2013.
Samples of water were also collected at the LAWTF and at SSJID Turnout 1, but neither PFOA nor PFOS was detected above laboratory reporting limits in either source.
In April 2019, pursuant to section 116400, the State Water Resources Control Board Division of Drinking Water ( DDW) sent monitoring orders to more than 200 public water systems across the state including Lathrop to test for PFAS. In its April 2019 Order, DDW ordered the City to collect and analyze samples for PFOA and PFOS from groundwater collected at Wells 9 and 10 because Wells 9 and 10 are within a one - mile radius of Well 21. In response to DDW' s 2019 monitoring order, Lathrop analyzed groundwater samples collected from Well 9 and Well 10 in May, June, and July 2019 and every quarter thereafter. The City also voluntarily began collecting groundwater samples from Wells 6, 7, and 8 in 2019. The City is currently required by DDW to collect and analyze samples for PFOA and PFOS from groundwater collected at each of its wells on a quarterly basis.
Sampling results showed that PFOA and PFOS concentrations in groundwater from Well 9 exceeded both the NLs and RLs. The NLs for PFOS were also exceeded in one or more samples collected from Wells 6, 7, 8, and 10. PFOA concentrations in groundwater from Wells 6, 7, 8, and 10 were below reporting limits.
Based on these and historical sampling results, the City took Well 9 offline in 2019 so that the PFOA concentrations in the blended flow from remaining wells are below the RLs.
The City anticipates installing centralized PFAS treatment at the LAWTF to treat groundwater from all of its wells ( EKI 2020; Carollo Engineers, 2022). Detections of PFOS in groundwater collected from each of the City' swells have exceeded the proposed PFOS MCL; detections of PFOA and the mixture of PFNA, PFHxS, PFBS, and GenX compounds in Well 9 have also exceeded the proposed MCLs. In addition, recent The NLs were 5. 1 ng/ Lfor PFOA and 6. 5 ng/ Lfor PFOS. The RL was 10 ng/ Lfor PFOA and 40 ng/ Lfor PFOS. 13 The HI is described in more detail on the EPA' s PFAS Drinking Water Regulation page:
https:// www. epa. gov/ sdwa/ and- polyfluoroalkyl- substances- pfas. eki environment
water 5- 12
December 2024
EKI C20049. 01
248
Section 5 2024 WSMP Amendment
WATER SYSTEM SUPPLIES City of Lathrop
sampling results found an increase in PFAS concentrations in Well 9, particularly the doubling of the observed PFOS concentrations.
The abovementioned water quality issues impact the reliability of the City' s groundwater supply.
Expansion of groundwater production in the future is limited by the costs associated with treatment and the availability of adequate supplies to conduct blending. Given the above issues, the City is not currently pursuing development of any additional wells or increased groundwater production.
5. 4. 2 Projected Supply Reliability by Year Type
The City' s projected water supply reliability in normal years, single dry years, and multiple dry years is described in the following sections.
5. 4.2.1 Normal Years
The City' s projected water supplies in normal years are presented in Table 5-7 and Figure 5-4. In normal years, the City expects to receive 100% of its SCWSP supplies ( see Section 5.1.) and 100% of its groundwater supply ( see Section 5.1.2). The normal year supply reliability is based upon SSJID' s water supplies in 2020.
5. 4.2. Single Dry Year
The City' s projected water supplies in single dry years are presented in Table 5-8 and Figure 5-. In single dry years, the City expects to receive between 79% and 99% of its SCWSP supplies ( see Section 5.1.) and 100% of its groundwater supply. The single dry year supply reliability is based upon SSJID' s water supplies in 1977.
5. 4.2.3 Multiple Dry Years
The City' s projected water supplies in multiple dry years are presented in Table 5- 9 and Figure 5-6. In multiple dry years, the City expects to receive between 79% and 100% of its SCWSP supplies ( see Section 5.1.) and 100% of its groundwater supply. The multiple dry year supply reliability is based upon SSJID' s water supplies over the period 2012 through 2016. eki environment
water 5- 13
December 2024
EKI C20049. 01
249
Section 5
WATER SYSTEM SUPPLIES
2024 WSMP Amendment
City of Lathrop
Table 5-7. Projected Potable Water Supply in Normal Years Supply Volume ( AFY)
Potable Water Source Reliability 2025 2030 2035 2040 2045 Current Sources
SSJID SCWSP Phase I 100% of Contract ( a) 6, 887 6, 887 6, 887 6, 887 6, 887 Groundwater 100% Reliable 4, 720 4, 720 4, 720 4, 720 4, 720 Current Sources 11, 607 11, 607 11, 607 11, 607 11, 607 Anticipated Future Sources
SSJID SCWSP Phase II 100% of Contract ( a) 3, 874 3, 874 Groundwater 100% Reliable 500 500 500 500 500
Current and Future Sources 12,07 12,07 12,07 15, 981 15, 981 Notes:
a) The projected normal year availability of SSJID SCWSP supplies is obtained from Table 7-4 of the City' s 2020 UWMP ( EKI, 2021a).
18, 000
16, 000
14, 000
a
12, 000
10, 000
8, 000
6, 000
4, 000
2, 000
0 2025
Figure 5-4. Projected Normal Year Potable Water Supply
2030 2035
Year
2040 2045
El SCWSP ( Phase 1) Groundwater (Current) SCWSP ( Phase 2) Groundwater ( Future) eki environment
water 5- 14
December 2024
EKI C20049. 01
250
Section 5
WATER SYSTEM SUPPLIES
2024 WSMP Amendment
City of Lathrop
Table 5-8. Projected Potable Water Supply in Single Dry Years Supply Volume ( AFY)
Potable Water Source Reliability 2025 2030 2035 2040 2045 Current Sources
SSJID SCWSP Phase I 79%- 99% of Contract ( a) 5, 778 6, 328 6, 877 5, 387 5, 785 Groundwater 100% Reliable 4, 720 4, 720 4, 720 4, 720 4, 720 Current Sources 10, 498 11, 048 11, 597 10,07 10, 505
Anticipated Future Sources
SSJID SCWSP Phase II 79%- 99% of Contract ( a) 3, 030 3, 254 Groundwater 100% Reliable 500 500 500 500 500
Current and Future Sources 10, 998 11, 548 12, 097 13, 637 , 14, 259 Notes:
a) The projected single dry year availability of SSJID SCWSP supplies is obtained from Table 7- 5 of the City' s 2020 UWMP ( EKI, 2021a).
Annual
Water
Supply (
feet) acre16, 000
14, 000
12, 000
10, 000
8, 000
6, 000
4, 000
2, 000
0 2025
Figure 5-. Projected Single Dry Year Potable Water Supply 2030 2035 2040 2045
Year
SCWSP ( Phase 1) Groundwater ( Current) SCWSP ( Phase 2) Groundwater ( Future) eki environment
water 5- 15
December 2024
EKI C20049. 01
251
Section 5
WATER SYSTEM SUPPLIES
2024 WSMP Amendment
City of Lathrop
Table 5-9. Projected Potable Water Supply in Multiple Dry Years Supply Volume ( AFY)
Potable Water Source Allocation 2025 2030 2035 2040 2045 Multiple Dry Years - First Year
Current Supplies
SCWSP Phase I 100% of Contract ( a) 6, 887 6, 887 6, 887 6, 887 6, 887 Groundwater 100% Reliable 4, 720 4, 720 4, 720 4, 720 4, 720 Current Sources ( First Year) 11, 607 11, 607 11, 607 11, 607 11, 607 Anticipated Future Supplies
SCWSP Phase II 100% of Contract ( a) 3, 874 3, 874
Groundwater 100% Reliable 500 500 500 500 500
Current and Future Sources ( First Year) 12,07 12,07 12,07 15, 981 15, 981 Multiple Dry Years - Second Year
Current Supplies
SCWSP Phase I 100% of Contract ( a) 6, 887 6, 887 6, 887 6, 887 6, 887 Groundwater 100% Reliable 4, 720 4, 720 4, 720 4, 720 4, 720 Current Sources ( Second Year) 11, 607 11, 607 11, 607 11, 607 11, 607 Anticipated Future Supplies
SCWSP Phase II 100% of Contract ( a) 3, 874 3, 874
Groundwater 100% Reliable 500 500 500 500 500
Current and Future Sources ( Second Year) 12,07 12,07 12,07 15, 981 15, 981 Multiple Dry Years - Third Year
Current Supplies
SCWSP Phase I 79%- 99% of Contract ( a) 5, 778 6, 328 6, 877 5, 387 5, 785 Groundwater 100% Reliable 4, 720 4, 720 4, 720 4, 720 4, 720 Current Sources ( Third Year) 10, 498 11, 048 11, 597 10,07 10, 505 Anticipated Future Supplies
SCWSP Phase II 79%- 99% of Contract ( a) 3, 030 3, 254
Groundwater 100% Reliable 500 500 500 500 500
Current and Future Sources ( Third Year) 10, 998 11, 548 12, 097 13, 637 14, 259 Multiple Dry Years - Fourth Year
Current Supplies
SCWSP Phase I 79%- 99% of Contract ( a) 5, 778 6, 328 6, 877 5, 387 5, 785 Groundwater 100% Reliable 4, 720 4, 720 4, 720 4, 720 4, 720 Current Sources ( Fourth Year) 10, 498 11, 048 11, 597 10,07 10, 505 Anticipated Future Supplies
SCWSP Phase II 79%- 99% of Contract ( a) 3, 030 3, 254
Groundwater 100% Reliable 500 500 500 500 500
Current and Future Sources ( Fourth Year) 10, 998 11, 548 12, 097 13, 637 14, 259 eki environment
water 5- 16
December 2024
EKI C20049. 01
252
Section 5
WATER SYSTEM SUPPLIES
2024 WSMP Amendment
City of Lathrop
Table 5-9. (Continued)
Supply Volume ( AFY)
Potable Water Source Allocation 2025 2030 2035 2040 2045 Multiple Dry Years - Fifth Year
Current Supplies
SCWSP Phase I 100% of Contract ( a) 6, 887 6, 887 6, 887 6, 887 6, 887 Groundwater 100% Reliable 4, 720 4, 720 4, 720 4, 720 4, 720 Current Sources ( Fifth Year) 11, 607 11, 607 11, 607 11, 607 11, 607 Anticipated Future Supplies
SCWSP Phase II 100% of Contract ( a) 3, 874 3, 874
Groundwater 100% Reliable 500 500 500 500 500
Current and Future Sources ( Fifth Year) 12,07 12,07 12,07 15, 981 15, 981 Notes:
a) The projected availability of SSJID SCWSP supplies during multiple dry years is obtained from Table 7- 6 of the City' s 2020 UWMP ( EKI, 2021a).
Annual
Water
Supply (
feet) acre18, 000
16, 000
14, 000
12, 000
10, 000
8, 000
6, 000
4, 000
2, 000
0 Figure 5-6. Projected Multiple Dry Year Potable Water Supply d--
rr
2025 2030 2035
Year
2040 Buildout
SCWSP ( Phase I) Groundwater ( Current) SCWSP ( Phase II) Groundwater ( Future) ek, environment
water 5- 17
December 2024
EKI C20049. 01
253
Section 5
2024 WSMP Amendment
WATER SYSTEM SUPPLIES City of Lathrop
5. Supply and Demand Assessment
The City' s projected water demands are described in Section 4.2, the City' s projected water supplies are discussed in Section 5. 4, and the reliability of these supplies in normal years and dry years is described in Section 5.. The following sections compare the City' stotal water supplies to its projected demands.
5.1 City -Wide Supply and Demand by Year Type
The following sections compare the City' s total water supplies under each year type discussed in Section 5.3 — normal years, single dry years, and multiple dry years — to the City' s projected water demands through 2045.
5.1. Normal Years
As shown in Table 5- 10 and Figure 5-7, the City' scurrent water supplies are sufficient supplies to meet projected demands in normal years through 2040. Without planned water supply projects, the City would experience supply shortfalls up to 798 AFY ( 6%) in 2045. SCWSP Phase II and restart of WeII 9 with PFAS treatment will allow the City to have sufficient supplies to meet projected demands through 2045.
5.1.2 Single Dry Year
As shown in Table 5- 11 and Figure 5-8, the City is projected to have adequate supplies to meet projected demands in single dry years through 2035 with its current water supplies. Without planned projects, the projected single dry year supply shortfall in 2040 and 2045 would be 967 AFY (9%) and 1, 901 AFY ( 15%), respectively. Future planned SCWSP Phase II and restart of WeII 9 will allow the City to have sufficient supplies to meet projected demands in single dry years through 2045.
5.1.3 Multiple Dry Years
As shown in Table 5- 12 and Figure 5-9, the City is projected to have adequate supplies to meet projected demands in multiple dry years through 2035 with its current water supplies. Without planned projects, the projected supply shortfall in multiple dry years would range from 798 AFY ( 6%) during the first, second, and fifth dry year to 21, 901 AFY ( 15%) during the third and fourth dry year in 2045, respectively. Future planned SCWSP Phase II and restart of Well 9 will allow the City to have sufficient supplies to meet projected demands in multiple dry years through 2045.
eki environment
water 5- 18
December 2024
EKI C20049. 01
254
Section 5
WATER SYSTEM SUPPLIES
2024 WSMP Amendment
City of Lathrop
Table 5- 10. Projected Potable Supply vs. Demand for Normal Year Scenario Projected Potable Water Demand
Estimated
2025
6, 128
Supply
2030
8, 099
and Demand
2035
9, 782
AFY) (a)( b)
2040
11, 083
2045
12, 405
Projected Supply - Current Sources 11, 607 11, 607 11, 607 11, 607 11, 607 Surplus or Deficit
Percent Shortfall
5, 479 3, 508 1, 825 524 798
6%
Projected Supply - Current and Future 12,07 12,07 12,07 15, 981 15, 981 Surplus or Deficit
Percent Shortfall
5, 979 4, 008 2, 325 4, 898 3, 576
Notes:
a)
b)
eki
Values for projected potable water demand are summarized in Table 4-5.
Projected available potable water supplies during normal years are summarized in Table 5-7. 18, 000
16, 000
14, 000
12, 000
10, 000
8, 000
6, 000
4, 000
2, 000
0 Figure 5-7. Normal Year Potable Supply vs. Demand
2025 2030 2035 2040 Buildout
Year
Projected Supply - Current Sources I I Projected Supply - Future Sources 4—Projected Normal Year Demand
environment
water 5- 19
December 2024
EKI C20049. 01
255
Section 5
WATER SYSTEM SUPPLIES
2024 WSMP Amendment
City of Lathrop
Table 5- 11. Projected Potable Supply vs. Demand for Single Dry Year Scenario Projected Potable Water Demand
Estimated
2025
6, 128
Supply
2030
8, 099
and Demand
2035
9, 782
AFY) (a)( b)
2040
11, 083
2045
12, 405
Projected Supply - Current Sources 10, 498 11, 048 11, 597 10,07 10, 505 Surplus or Deficit
Percent Shortfall
4, 370 2, 949 1, 815 976
9%
1, 901
15%
Projected Supply - Current and Future 10, 998 11, 548 12, 097 13, 637 14, 259 Surplus or Deficit
Percent Shortfall
4, 870 3, 449 2, 315 2, 554 1, 854
Notes:
a) Projected available potable water supplies during single dry years are summarized in Table 5-8. b) Values for projected potable water demand are summarized in Table 4-5. 16, 000
14, 000
12, 000
10, 000
8, 000
6, 000
4, 000
2, 000
0 Figure 5-8. Single Dry Year Potable Supply vs. Demand 2025 2030 2035
Year
2040 Buildout
Projected Supply - Current Sources ,, ' Projected Supply - Future Sources Projected Single Dry Year Demand
eki environment
water 5- 20
December 2024
EKI C20049. 01
256
Section 5
WATER SYSTEM SUPPLIES
2024 WSMP Amendment
City of Lathrop
Table 5- 12. Projected Supply vs. Demand for Multiple Dry Years Scenario Estimated Supply and Demand ( AFY) (a)( b)
2025 2030 2035 2040 2045
First Dry Year
Projected Potable Water Demand 6, 128 8, 099 9, 782 11, 083 12, 405 Projected Supply - Current Sources 11, 607 11, 607 11, 607 11, 607 11, 607 Surplus or Deficit
Percent Shortfall
5, 479 3, 508 1, 825 524 798
6%
Projected Supply - Current and Future 12,07 12,07 12,07 15, 981 15, 981 Surplus or Deficit
Percent Shortfall
5, 979 4, 008 2, 325 4, 898 3, 576
Second Dry Year
Projected Potable Water Demand 6, 128 8, 099 9, 782 11, 083 12, 405 Projected Supply - Current Sources 11, 607 11, 607 11, 607 11, 607 11, 607 Surplus or Deficit
Percent Shortfall
5, 479 3, 508 1, 825 524 798
6%
Projected Supply - Current and Future 12,07 12,07 12,07 15, 981 15, 981 Surplus or Deficit
Percent Shortfall
5, 979 4, 008 2, 325 4, 898 3, 576
Third Dry Year
Projected Potable Water Demand 6, 128 8, 099 9, 782 11, 083 12, 405 Projected Supply - Current Sources 10, 498 11, 048 11, 597 10,07 10, 505 Surplus or Deficit
Percent Shortfall
4, 370 2, 949 1, 815 976
9%
1, 901
15%
Projected Supply - Current and Future 10, 998 11, 548 12, 097 13, 637 14, 259 Surplus or Deficit
Percent Shortfall
4, 870 3, 449 2, 315 2, 554 1, 854
Fourth Dry Year
Projected Potable Water Demand 6, 128 8, 099 9, 782 11, 083 12, 405 Projected Supply - Current Sources 10, 498 11, 048 11, 597 10,07 10, 505 Surplus or Deficit
Percent Shortfall
4, 370 2, 949 1, 815 976
9%
1, 901
15%
Projected Supply - Current and Future 10, 998 11, 548 12, 097 13, 637 14, 259 Surplus or Deficit
Percent Shortfall
4, 870 3, 449 2, 315 2, 554 1, 854
eki environment
water 5- 21
December 2024
EKI C20049. 01
257
Section 5
WATER SYSTEM SUPPLIES
2024 WSMP Amendment
City of Lathrop
Table 5- 12. Projected Supply vs. Demand for Multiple Dry Years Scenario ( Continued) Estimated Supply and Demand ( AFY) (a)( b)
2025 2030 2035 2040 2045
Fifth Dry Year
Projected Potable Water Demand 6, 128 8, 099 9, 782 11, 083 12, 405 Projected Supply - Current Sources 11, 607 11, 607 11, 607 11, 607 11, 607 Surplus or Deficit
Percent Shortfall
5, 479 3, 508 1, 825 524 798
6%
Projected Supply - Current and Future 12,07 12,07 12,07 15, 981 15, 981 Surplus or Deficit
Percent Shortfall
5, 979 4, 008 2, 325 4, 898 3, 576
Notes:
a) Projected available potable water supplies during multiple dry years are summarized in Table 5-9. b) Values for projected potable water demand are summarized in Table 4-5. 0 E
a
o
QQ
c
H
L u
co
d
CO
o
a
18, 000
16, 000
14, 000
12, 000
10, 000
8, 000
6, 000
4, 000
2, 000
0 Figure 5-9. Multiple Dry Year Supply vs. Demand
2025 2030 2035 2040 Buildout
Year
Potable Water Supply —— Projected Potable Water Demand
ek, environment
water 5- 22
December 2024
EKI C20049. 01
258
Section 5 2024 WSMP Amendment
WATER SYSTEM SUPPLIES City of Lathrop
5. 6 Recommended Water Supply Strategy
The supply versus demand assessment presented above has shown that the City is projected to have adequate supplies to meet projected demands in all year types through 2045 with implementation of SCWSP Phase II by 2040 and PFAS treatment to allow for the City to operate WeII 9. The City would experience up to a 6% shortfall without implementation of SCWSP Phase II and restart of WeII 9 in 2045 under the normal year scenario.
However, future reliability of SCWSP water is uncertain due to adoption of the Bay -Delta Plan Amendment, which could result in significant surface water cutbacks. The SSJID and others are continuing negotiations with SWRCB on implementation of the Bay -Delta Plan Amendment for water supply cutbacks, particularly during droughts. This is a dynamic situation and the projected drought cutback allocations may change depending on the outcome of ongoing negotiations. A conservative estimate of the potential impacts of the Bay -Delta Plan Amendment on the SCWSP is provided in Appendix H of the 2020 UWMP ( EKI, 2021a).
In the near -term, EKI recommends that the City complete the treatment for PFAS to meet proposed regulatory requirements that are anticipated to be effective by early 2027. In addition, the City should monitor the outcomes of the Voluntary Agreement negotiations. In the event that the Bay -Delta Plan Amendment is implemented or if highly restrictive Voluntary Agreements with the SWRCB are implemented, additional water projects such as ASR ( see Section 5. 6.3) may be needed to supplement the City' sexisting supplies and boost drought reliability.
The City relies on implementation of SWCSP Phase II to meet demands from 2040 and onwards. In the long- term (i.e., before 2040), EKI recommends that the City purchase its Phase II SCWSP allocations and expand its SSJID Turnout 2 capacity to meet its Phase II design criteria ( see Section 5. 1.). As this project will require the expansion of SSJID' s DGWTP, the City will need to initiate efforts to secure SCWSP Phase II supplies at least 5- 10 years prior to when the allocations are needed, because this project will likely require significant lead time for planning, design, and construction.
The abovementioned water supply projects are discussed in more detail below. In addition to these projects, EKI is aware that potential water transfer opportunities may exist with Stockton East Water District (SEWD) water contractors. It is recommended that the City explore such opportunities to increase its available supplies.
5. 6. 1 SSJID SCWSP Phase II
As discussed in Section 5.1., the City' s
SSJID supply is anticipated to increase from 6, 887 AFY to 10, 671 AFY with the implementation of Phase II of the SCWSP ( see Section 5.1). The timing of Phase II is unknown, but for water supply planning purposes it is assumed that SSJID Phase II water will be available to the City by 2040.
5. 6. 2 Treatment for PFAS
As mentioned above, the City detected emerging contaminants belonging to the group of PFAS in its groundwater production wells. The City took WeII 9 offline in 2019 so that the PFOA concentration in the blended flow from the remaining wells is below California' s RLs for PFOA. With the proposed MCLs issued by the USEPA in March 2023, the City anticipates treatment for all of its groundwater wells.
In 2020, EKI evaluated 11 alternatives for PFAS management and treatment and conducted a bench -scale granular activated carbon ( GAC) test to explore the performance of treating the City' s groundwater with GAC pressure vessels ( EKI, 2020). In 2022, the City contracted with Carollo Engineers ( Carollo) to further study and develop the City' s options for GAC treatment of only groundwater from WeII 9 and blended groundwater from all the City' s wells ( Wells 6- 10) at the LAWTF ( Carollo Engineers, 2022). Treatment for eki environment
water 5- 23
December 2024
EKI C20049. 01
259
Section 5 2024 WSMP Amendment
WATER SYSTEM SUPPLIES City of Lathrop
PFAS consists of passing water through GAC media beds contained in pressure vessels in a lead/ag configuration. The treatment process will contain key components including the PFAS treatment pressure vessels, GAC backwashing facilities, and booster pumps, with a full capacity of 7, 000 gpm. The PFAS treated water will reenter the existing treatment processes at the LAWTF upstream of chemical addition before being sent to the LAWTF storage tank.
EKI is currently assisting the City with evaluating the City' s groundwater for the presence, potential transport, and sources of PFAS, and proposed treatment options. The study aims to better understand ( 1) the extent of PFAS contamination, (2) if the elevated levels of PFAS detected in Well 9 or other locations will impact the City' sother drinking water supply wells, and ( 3) how these potential impacts may impact planned PFAS treatment. Preliminary groundwater modeling results as of December 2023 reveal that a 500 AFY of production at Well 9 is needed to hydraulically control PFAS in groundwater sourcing from south of the City' swells.
5. 6. 3 Aquifer Storage and Recovery
ASR is defined as the recharge of water through a well into a suitable aquifer during times when water is available or is the best quality for recharge, storage for a period of weeks to months or years, and recovery from the same well during times when the stored water is needed. The ASR operation forms a buffer zone around the ASR well, separating the native groundwater and the stored water, which in the City' scase will be treated, higher -quality SCWSP water. The stored water will be available for recovery during times when it is needed to meet peak or emergency demands or during severe droughts.
The City contracted with Carollo Engineers and completed an engineering feasibility study for ASR in 2023.
The feasibility study included drilling of an ASR test hole, water quality sampling and testing, and recommendations for well design ( Carollo Engineers, 2023).
The site selected for the ASR well is at the River Islands potable water storage and sewer pumping project, located at 950 Stewart Road. The test well was completed to 800 ft bgs where a favorable zone for storage was found in the last 60 feet of drilling. From the initial monitoring well results, the City' s ASR well capacity
is estimated at 1, 000 gpm, or approximately 1. 44 MGD.
An ASR project will boost the City' ssupply reliability during water supply emergencies ( e.g. due to water quality concerns) or severe droughts, especially with the uncertain outcomes of the Bay - Delta Plan Amendment implementation, as discussed above.
eki environment
water 5- 24
December 2024
EKI C20049. 01
260
Section 6 2024 WSMP Amendment
WATER SYSTEM PERFORMANCE AND OPERATIONS CRITERIA City of Lathrop 6 WATER SYSTEM PERFORMANCE AND OPERATIONS CRITERIA
This section describes the recommended performance and operational criteria by which the City' sexisting and key planned infrastructure will be evaluated. These criteria are based on California Code of Regulations Title 22 ( Title 22) requirements, 2022 Lathrop Design and Construction Standards Standards"; Lathrop, 2022c), and the 2019 WSMP. These criteria can be grouped into two categories:
1) criteria used to evaluate the water distribution system' sperformance ( Section 6.1) and ( 2) criteria used to evaluate the sizing of the systems water facilities, including pipelines, turnouts, tanks and pump stations (Section 6.2).
The water distribution system criteria include maximum and minimum allowable system pressures, required fire flows and pressure, and requirements for minimum supply capacity. The water supply and storage facilities criteria include maximum allowable pipeline velocity and head loss, pumping capacity and water storage capacity for normal and emergency conditions. These criteria are summarized in Table 6- 1 and described in further detail in the following section.
6. 1 Distribution System Performance Criteria
6. 1. Peaking Factors
The WSMP uses peaking factors to estimate MDDs and PHDs for purposes of evaluating the distribution system performance under peak demand conditions. As discussed in Section 4.3, the following peaking factors are applied as part of this IWRMP Amendment:
MDD Peaking Factor = 1. 7 x ADD
PHD Peaking Factor = 2. 6 x ADD
In addition, a 5% water loss ( non -revenue water) factor is applied to the water demand projections to estimate ADDs ( see Section 4.2). These peaking factors are also used to size facilities for peak demand conditions, as discussed in Section 6. 2.
6. 1. 2 Fire Flows
The Lathrop Manteca Fire District ( LMFD) has established minimum fire flow and residual pressure requirements for firefighting purposes, which the City is responsible for providing in its water distribution system. Required fire flows are based on land use designation and are designed to be conservative for long- term planning. The required fire flow requirements are summarized in Table 6-2. LMFD has reviewed and approved these requirements for planning purposes. These fire flows must be provided in conjunction with maximum day demand conditions while maintaining a minimum residual pressure of 20 pounds per square inch ( psi) at all system nodes. The distribution of the required fire flows within the City are shown on Figure 6-1.
As discussed below, these flows and durations are used to establish supply capacity criteria, pipe sizing, and storage and pumping capacity requirements.
6. 1. 3 Water Supply Capacity
As discussed in Section 3, the City' s water distribution system consists of a single pressure zone, with both groundwater and surface waters supplied to meet customer demands. Maximum day demand plus fire flow and peak hour demand conditions will be used to assess the adequacy of the City' s potable water supply and distribution system capacities. The following sections describe the supply assumptions and criteria for each demand condition.
eki environment
water 6-1
December 2024
EKI C20049. 01
261
Section 6 2024 WSMP Amendment
WATER SYSTEM PERFORMANCE AND OPERATIONS CRITERIA City of Lathrop
6. 1.3. Peak Conditions — Peak Hour Demand
During normal operation conditions, the City' s
water supply system is required to be capable of meeting peak hour demand conditions, while meeting minimum and maximum system pressure criteria. This demand condition can be met with a combination of storage, surface, and groundwater sources. This includes firm pumping capacity at all existing and planned storage tanks, existing and planned SSJID turnouts, and the LAWTF. The firm capacity is defined for each facility as its capacity with its highest capacity domestic pump offline.
6. 1.3.2 Peak Conditions — Maximum Day Demand with Fire Flow During emergency fire flow conditions, the City' sfirm water supply system capacity is required to be capable of meeting maximum day demand conditions in conjunction with two concurrent fires, with one industrial fire and one residential fire, while meeting minimum and maximum system pressure criteria.
This demand condition can be met with a combination of storage, surface, and groundwater sources. This includes firm pumping capacity at all existing and planned storage tanks, existing and planned SSJID turnouts, and the LAWTF.
6. 1.4 Distribution System Pressures
The distribution system' s ability to maintain adequate system pressures is the primary indicator of acceptable system performance. Under normal operating conditions, the distribution is required to maintain a minimum pressure of 40 psi ( Title 22 requirement) and a maximum pressure of 80 psi. As discussed above, the system must be able to maintain a minimum of 20 psi under fire flow conditions to comply with Title 22.
eki environment
water 6- 2
December 2024
EKI C20049. 01
262
Section 6
WATER SYSTEM PERFORMANCE AND OPERATIONS CRITERIA
2024 WSMP Amendment
City of Lathrop
Table 6-1
Summary of Recommended Potable Water System Performance and Operational Criteria Component Criteria
WATER SYSTEM PERFORMANCE
FireFlow Requirements
Data Sources/ Remarks (a)
Single Family 1, 250 gpm for 2 hours. Based on review and approval by Multi Family 2, 000 gpm for 2 hours. the Fire Marshal for master General
Commercial and
Office
3, 000 gpm for 2 hours.
planning. Requirements are general
requirements for master planning
purposes, and may not be indicative
Heavy Commercial 4, 000 gpm for 2 hours. of requirements for specific Industrial 4, 000 gpm for 2 hours. developments.
Peaking Factors For System Analysis
Water Loss ( NonRevenue Water)
5% increase to average day demands for unaccounted for
water.
Max Day to Average
Day Peaking Factor
1. 7 times average day demand.
IWRMP recommendation based on
demand evaluation.
Peak Hour to
Average Day
2. 7 times average day demand.
Water System Supp y Requirement
Demand Condition
To Be Met
Peak Conditions - Normal Operations: Provide firm water supply capacity to meet maximum day demand.
Peak Conditions - Emergencies: Provide firm water supply and storage capacity to meet maximum day and two concurrent fires, or peak hour demands, whichever is larger.
Distribution System Pressures
Maximum Pressure 80 psi at customer service connections Minimum Pressure -
Normal Operating
Conditions for
System Expansions
40 psi at customer service connections excluding fire flow Title 22 requirements for system
expansions that expand the number
of existing system service
connections by 20 percent or more.
Minimum Pressure -
Max Day Plus Fire
Flow Conditions
20 psi
Title 22 requirement for minimum
allowable pressure.
ek, environment
water 6-3
December 2024
EKI C20049. 01
263
Section 6
WATER SYSTEM PERFORMANCE AND OPERATIONS CRITERIA
2024 WSMP Amendment
City of Lathrop
Table 6- 1 (Cont.)
Summary of Recommended Potable Water System Performance and Operational Criteria Component Criteria Data Sources/ Remarks ( a)
FACILITIES SIZING
Pipelines
Distribution Main
Diameter
General: 8 -inch diameter or larger
Cul- de- sacs and end runs: 6 -inch diameter acceptable within culde -sacs and end runs of less than 500 feet where future extensions will not occur and no fire hydrants are located.
Commercial and industrial: 10 -inch diameter or larger serving commercial or industrial areas.
Dead -End Main
Diameter and
Length
6 -inch diameter limited to max length of 100 feet.
8 -inch diameter limited to max length of 1, 200 feet.
12 -inch diameter limited to max length of 2, 400 feet.
Maximum
Velocity
6 ft/ s, all system mains, peak hour demand
10 ft/ s, all system mains, maximum day plus fire flow
IWRMP recommendation based
Maximum Head
Loss
3 ft per 1, 000 ft, mains 16", peak hour demands
7 ft per 1, 000 ft, mains < 16", peak hour demands
10 ft per 1, 000 ft, all system mains, maximum day plus fire flow on industry practice, modified
from 2013 Draft Water Master
Plan.
Hazen Williams
C" Factor
New Piping = 140
Existing System Piping = 120 - 130 per model calibration New Piping C -factor based on
City Design and Construction
Standards. Existing system piping
C -factors confirmed by EKI
calibration.
Pipeline Material
All Domestic Water Mains: PVC C900 or C905 Class 150
All Fire Lines: PVC C900 or C905 Class 200
Booster Pump Station Capacity
Pumping Capacity
Citywide, firm pumping capacity equal to maximum day demand plus fire flow ( one industrial and one residential) or peak hour demand, whichever is larger.
Per development area, firm pumping capacity equal to peak hour demand plus ability to meet single largest fire flow requirement ( confirm by modeling).
Firm pumping capacity defined
as the total capacity of all pumps
minus the capacity of one
domestic pump.
Backup Power Equal to firm pumping capacity of facility.
IWRMP recommendation for
system reliability.
Water Storage Capacity
Operational
Equalization)
Equal to 25 percent of maximum day demand calculated per development.
Fire Supply flow for simultaneously fighting one residential (2, 000 gpm) and one industrial fire (4, 000 gpm) for 2 hours (City- wide).
Emergency
Equal to 75 percent of maximum day demand calculated per development.
Emergency
Groundwater
Credit
Equal to the firm groundwater supply that can be reliably pumped (facilities equipped with auxiliary power) (Citywide).
The maximum emergency
storage credit is equal to the
reliable pumping capacity over
an 18 -hour period.
Total Water
Storage Capacity
100 percent of max day demand plus fire volume.
Summation of operational, fire,
and emergency storage minus
emergency groundwater credit.
Notes:
a) Source: Water System Standards, City of Lathrop Department of Public Works Design and Construction Standards, January 2014, unless noted otherwise.
eki environment
water 6-4
December 2024
EKI C20049. 01
264
Section 6
WATER SYSTEM PERFORMANCE AND OPERATIONS CRITERIA
2024 WSMP Amendment
City of Lathrop
Table 6-2. Required Fire Flow and Storage Requirements
General Land Use Designation
Very Low Density
Medium Density Residential
Examples of Specific Developments
All existing single family residential developments, as wells as planned unit development and recreation
residential.
Fire Flow
gpm)
1, 250
High Density Residential All existing apartment and condominium developments. 2, 000 General Commercial and
Office
Highway, Village, Regional, Service, Neighborhood
Commercial designations. Includes Professional Offices
and Community Commercial designations.
3, 000
Heavy Commercial Areas designated as Recreation and/ or Hotels. 4, 000 Industrial Limited and General Industrial 4, 000
Notes:
a) Fire flow requirements were reviewed by LMFD with the City on 15 August 2017 and were determined to be consistent with Lathrop' s City Standards and the LMFD Master Plan for long term master planning purposes.
b) Fire flows imported into model were based on zoning land use designations. eki environment
water 6- 5
December 2024
EKI C20049. 01
265
egend
Sphere of Influence
IN Treatment Plant
W Pump Station
ID Enclosed Storage Facility
0 SSJID Turnout
Pipe
Hydrant Fire Flow Requirement
1250 GPM
O 2000 GPM
3000 GPM
4000 GPM
Abbreviations
BPS = booster pump station
GPM = gallons per minute
LAWTF = Louise Avenue Water Treatment Facility
Sol = Sphere of Influence
SSJID = South San Joaquin Irrigation District
Notes
1. All locations are approximate.
Sources
1. Aerial photograph provided by ESRI' s ArcGIS Online, 13 November 2024.
N
o 3, 00D 6, 000
lewk S Feet:
Fire Flow Requirement
Wkler 6y. Nm Metier Hen Amendment
City of Lennon
Lathrop CA
Denember 2024 ekenvironment I & 020048.
water
01 Figure 6-1
266
Section 6 2024 WSMP Amendment
WATER SYSTEM PERFORMANCE AND OPERATIONS CRITERIA City of Lathrop
6. 2 Water Facilities Criteria
The following sections describe the performance and sizing criteria for City water facilities.
6. 2. 1 Water Transmission and Distribution Pipeline Sizing Criteria The following pipeline velocity and head loss criteria will be used for sizing new transmission and distribution pipelines. However, when evaluating the existing system, velocity and head loss criteria are secondary to the system pressure criteria ( Section 6. L4). For example, if system pressures are satisfied under normal and fire flow conditions, an existing pipe that exceeds maximum velocity or head loss criteria will not necessarily be indicative of a problem that requires system improvements. Any identified exceedances will be reviewed on a case - by -case basis to determine if they are influencing any deficient system pressures or if improving these pipes to meet velocity or head loss criteria would benefit the water movement within the system or increase system redundancy.
6. 2.1. Velocity Criteria
The following velocity criteria, in conjunction with head loss criteria described below, are recommended for sizing of new water mains:
PHD conditions: Maximum velocity of 6 feet per second ( fps) for all mains MDD plus fire flow conditions: Maximum velocity of 10 fps for all mains As discussed above, for existing infrastructure these criteria are secondary to pressure criteria and are evaluated to identify potential bottlenecks in the system that could be upsized to address pressure deficiencies.
6. 2.1. Head loss Criteria
In addition to velocity criteria, the following head loss criteria must also be met for sizing of new water mains:
PHD conditions:
o Pipes < 16 inches in diameter: Maximum head loss of 7 feet per 1, 000 feet of pipe ( ft/ kft) o Pipes 16 inches in diameter: Maximum head loss of 3 ft/ k-t MDD plus fire flow conditions: Maximum head loss of 10 ft/ k-tfor all mains The PHD head loss criteria distinguish between pipes less than 16 inches and those greater or equal to 16 inches in diameter. The larger pipes are generally used to transmit water long distances from sources to smaller distribution pipelines which serve customer connections.
For existing pipelines these criteria are used to identify bottlenecks in the system that if upsized could relieve downstream pressure to meet pressure criteria and improve connectivity of major supply sources and storage facilities to outlying areas.
6. 2. Booster Pump Stations
In order to meet varying demand conditions, the City Standards require that firm pumping capacity among all water supply sources and booster pump stations be able to provide the greater of:
Maximum day demand conditions with two simultaneous fires, with one being high density residential and one being industrial or heavy commercial; or Peak hour demands.
ekienvironment water 6- 7
December 2024
EKI C20049. 01
267
Section 6 2024 WSMP Amendment
WATER SYSTEM PERFORMANCE AND OPERATIONS CRITERIA City of Lathrop This criterion exists to ensure there is sufficient pumping capacity distributed throughout the system to meet peak demand conditions. EKI also recommends the City establish criteria to provide backup power for all facilities to provide firm pumping capacity.
New booster pump stations should be sized for a firm capacity equal to peak hour demands of the area to be served, at a minimum, and modeling must confirm that this capacity is sufficient to meet required fire flows in this area.
6. 2. 3 Water Storage Capacity
Treated water storage capacity includes equalization storage, fire storage, and emergency storage. The following storage criteria were established in prior master plan updates and have already been incorporated into the City Standards ( 2022). The following sections explain each storage requirement in detail. Existing storage capacity is evaluated system -wide to meet the following criteria. Future development will be required to provide requisite equalization and emergency storage based on their projected demands.
6. 2.3.1 Equalization Storage
As discussed in Section 6. 1, peaking factors are developed to capture varying water use conditions. Higher water demand periods occur during summer months as compared to winter months when irrigation demands are higher. Over the course of the day, usage peaks in the early morning when people are preparing for their day and at night when people return home and begin irrigating their landscapes.
As discussed in Section 6. 1.3, the water supply criterion requires firm treatment plant and supply turnout capacity provide MDD. Additional pumping capacity from booster pump stations is used to meet peak demand conditions ( Section 6. 2.). This storage volume is then refilled during low demand periods when water supply is greater than water demand.
The storage volume used to meet these high demand periods is called operational or equalization storage.
Recommended equalization storage is equal to 25% of MDD.
6. 2.3. Emergency Storage
Emergency storage is required to meet demands during various emergencies, such as natural disasters, pipeline failures, treatment failures, power outages or pump station failure. No standard requirements exist for determining the appropriate amount of emergency storage, and each utility establishes these requirements based on their judgement. Currently, the City has an emergency storage requirement of 75% of MDD. EKI finds this requirement to be appropriately conservative.
6. 2.3. Fire Storage
As discussed in Section 6. 1.2, fire flow and duration requirements were established for long- term planning purposes by the City and LMFD. The total system -wide fire storage volume is required to supply a concurrent industrial fire ( 4, 000 gpm for 2 hours) and high -density residential fire (2, 000 gpm 2 hours).
This results in a total storage requirement of 0. 72 MG which should be distributed throughout the system.
6. 2.3.4 Groundwater Storage Credit
The City' s groundwater basin can account for a portion of the City' s emergency storage requirement.
Groundwater credit for emergency storage is defined as the quantity of groundwater which can reliably be produced in the event of an emergency over an 18 -hour period. The groundwater credit is calculated based on the firm groundwater supply of facilities equipped with backup power (i.e., the total capacity of the all the wells with backup power minus the capacity of the largest well with backup power). Additional eki environment
water 6- 8
December 2024
EKI C20049. 01
268
Section 6 2024 WSMP Amendment
WATER SYSTEM PERFORMANCE AND OPERATIONS CRITERIA City of Lathrop considerations should be made as to the system' s ability to transmit this water to outlying areas of the City.
eki environment
water 6- 9
December 2024
EKI C20049. 01
269
Section 7 2024 WSMP Amendment
DISTRIBUTION SYSTEM HYDRAULIC CAPACITY EVALUATION City of Lathrop 7 DISTRIBUTION SYSTEM HYDRAULIC CAPACITY EVALUATION
EKI updated the City' s water system hydraulic model to evaluate the ability of the City' s distribution system to meet the recommended performance and operational criteria described in Section 6. 1. A hydraulic model transforms information about the physical facilities and system into a mathematical model to analyze the water system under various demand conditions. The hydraulic model generates information on pressure, flows, velocities, and head loss that can be used to assess system performance and identify deficiencies. The hydraulic model can also be used to verify the adequacy of recommended or proposed system improvements.
7. 1 Hydraulic Modeling Approach
To evaluate distribution system performance against performance criteria, EKI conducted steady- state model simulations of (1) PHD, and ( 2) MDD plus fire flows for existing and buildout scenarios. Key planned infrastructure was added to the future scenarios to support future developments.
All model runs except for the fire flow simulations were conducted with the fire pumps offline and with firm domestic capacity available at each BPS. These results provided information on junction pressures and pipeline head loss and velocity.
To determine available fire flow and pressure at each node, fire flow simulations were modeled during MDD conditions. Pump controls were set such that fire pumps switched on when firm domestic pumping capacity was unable to meet discharge pressure requirements. The fire flow simulations determine the fire flow availability at each hydrant while maintaining a minimum of 20 psi everywhere in the system.
These results were compared to required fire flows to determine which hydrants are not meeting the required criteria. Additional fire flow analyses were conducted by applying fire demands on individual hydrant nodes to evaluate pipeline head loss and velocity criteria for recommended new pipes under MDD plus fire flow conditions.
7. 2 Hydraulic Model Update
This section documents the updates of the City' s existing water system hydraulic model. The section provides an overview of the model expansion process, the water system improvements incorporation, and model validation and calibration.
7. 2. 1 Model Platform
The City' s existing water system hydraulic model was developed on Innovyze InfoWater platform by EKI for the 2019 WSMP. The model has been migrated to Innovyze InfoWater Pro, which provides enhanced analytical tools and higher geographical information system ( GIS) integration capabilities. This software upgrade allows not only for automatic synchronization between the model and infrastructure GIS to limit future maintenance efforts but also for the City' s emerging water system simulation needs.
7. 2. Model Update
The City maintains a GIS geodatabase of its infrastructure assets, which was used as the basis of information to construct the existing water system hydraulic model. EKI updated the City' s GIS database
to incorporate recent infrastructure improvements, identified and filled data gaps to make sure the GIS database accurately represented the City' s existing utility infrastructure as of January 2023.
Significant efforts were required after the City' s geodatabase updates were completed to update and validate the hydraulic model. After importing the City' s GIS data into the hydraulic model, the following
steps were performed to address data gaps, validate network data, and create a fully connected network:
eki environment
water 7- 1
December 2024
EKI C20049. 01
270
Section 7 2024 WSMP Amendment
DISTRIBUTION SYSTEM HYDRAULIC CAPACITY EVALUATION City of Lathrop New water system infrastructure, including tanks, BPSs, pipeline improvements constructed post 2019 WSMP, has been digitized in the geodatabase and incorporated into the new hydraulic model. 14,s
Planned transmission mains, tanks, and BPSs were added for the buildout scenario.
The model network was reviewed and refined for connectivity. Using the software' stools, each pipe was connected to a model node or junction. Orphan and duplicate elements were corrected.
Elevations were assigned to each new model node by extracting elevations from publicly available light detection and ranging ( LiDAR) data.
Hazen -Williams friction C -Factors were applied to each pipe.
Tank and pump station configurations were verified and updated as needed. Pump operational settings were initially imported from the City' s prior hydraulic model and updated with City' s September 2023 setpoints.
Parcel -level existing water demand and future projections were allocated to the nearest node.
Fire flow requirements were allocated to each hydrant node based on land use type.
7. 2. 3 Model Validation and Calibration
Given that the City' s distribution system is largely comprised of newer PVC pipes, the pipeline C -factors are unlikely to have changed significantly since the 2019 WSMP. As a substitution of typical model calibration, EKI retained the C -factors from the existing hydraulic model for pipes constructed prior 2019 WSMP, which was calibrated with field hydrant test data. A C -factor of 140 was assigned to planned new pipes or pipes constructed post the 2019 WSMP, based on the City' s Design Standards ( 2022).
After model construction, EKI validated the model to verify correct model construction, controls, and correct assignment of model variables. EKI conducted model validation runs of the existing system scenario to check the accuracy of the model' srepresentation of real system operations. EKI compared the results of these validation runs against SCADA system data provided by the City to determine if modeled system pressures were generally consistent with actual system pressures. Based on these runs, EKI updated the operational settings of the pump stations in the model and modeled the pumps with variable frequency drives accordingly to better represent actual pump operations.
7. 3 Modeling Scenarios
Existing infrastructure and key planned infrastructure were assessed under two scenarios: Existing (2022), and Buildout ( 2045) development scenarios. Figure 7- 1 shows parcels and future development included in each scenario.
Water infrastructure included in the Existing scenario is described in Section 3 and shown on Figure 3-1.
Key planned infrastructure was initially separated by anticipated development timing ( i.e., the Near - Term Future, Long -Term Future, and Selected Buildout scenarios) in the 2019 WSMP based on available drawings, design reports, and prior planning documents. However, as the development projections have 14 New infrastructure includes Tanks 5 and 6 with their onsite BPSs, installation of new 12" main on Louise Avenue and new 8" main on S Harland Road, as well as distribution network expansion in River Islands, Mossdale, and Central Lathrop.
15 Pipeline improvements include upsizing of existing 8" - 12" pipelines on J Street, Avon Street, and at the BPS - 1 site.
eki environment
water 7- 2
December 2024
EKI C20049. 01
271
Section 7 2024 WSMP Amendment
DISTRIBUTION SYSTEM HYDRAULIC CAPACITY EVALUATION City of Lathrop been changed significantly since then, to minimize the variations associated with development timing change and account for the overall impact caused by the system expansion, the prior future scenarios were consolidated as a single Buildout scenario with all key planned infrastructure. Figure 7-2 shows the locations of planned infrastructure.
The following planned development -related infrastructure is included in the Buildout scenario:
Lathrop Gateway: A new 1. 0 MG storage tank, a booster pump station with a firm pumping capacity of 3, 000 gpm, and 16 -inch transmission line connecting the booster pump station to Yosemite Avenue at the former Well 21 site, south of the intersection of Yosemite Avenue and McKinley Avenue.
River Islands: Two additional 1. 8 MG storage tanks ( Tank 5B and Tank 5C) at the existing Tank 5 site and one additional 4, 000 fire pump at the existing BPS -5 site.
River Islands Phase 2: The River Islands Phase 2 storage tanks ( 3. 6 MG total) and BPS with three domestic variable speed pumps with capacities of 2, 000 gpm each and a 4, 000 gpm fire pump 8, 000 gpm firm capacity) located southwest of the intersection of S Paradise Rd and W Stewart Rd; expansion of backbone water mains required to support the River Islands phase 2 development. 16
Central Lathrop: Expansion of backbone water mains to support CLSP development, including an 8 -inch I-5 crossing at Lathrop Road'. Diameter of the backbone water mains were optimized and downsized to serve lower projected water demands in the Central Lathrop area, as verified in Section 7. 4.2.
Mossdale Landing West: Planned water distribution mains, ranging from 8" to 10" in diameter, to support the Mossdale Landing West development.
Parcel -level potable water ADDs for the Existing scenario were assigned based on each parcel' s actual 2022 water billing data. Incremental ADDs were added in the Buildout scenario using the land -use specific water demand factors to match the water demand projections described in Section 4. Table 7- 1 summarizes the total ADD, MDD, and PHD under each scenario.
As discussed in Section 7.1, EKI conducted steady- state model simulations of PHD and MDD plus fire flows for each scenario.
le Tank and pipe information extracted from River Islands' WaterCAD model, provided on May 30, 2023. The phase 2 BPS characteristics were assumed to be consistent with Tank 5 BPS without SSJID Turnout 2 expansion. 17 The I-5 crossing at Lathrop Road was originally anticipated to be completed by developers but is now incorporated in the City' s
CIP as project PW 25- 10 and Section 9. 2.
ek, environment
water 7- 3
December 2024
EKI C20049. 01
272
f,egend 7.Sphere of Influence
Development Areas
Central Lathrop
Crossroads
Historic Lathrop Infill and Other Developments
Lathrop Gateway
Mossdale Landing
Mossdale Landing East
Mossdale Landing West
Mossdale Landing South
0 River Islands
Sharpe Army Depot
r) South Lathrop
Incremental Development by Model Scenario
Existing ( 2022)
Buildout ( Beyond 2040)
Notes
1. All locations are approximate.
Sources
1. Aerial photograph provided by ESRI' s AroGIS Online, 13 November 2024.
Aa _ 4, 000 8, 000
scale in reef)
eki
Modeling Scenarios
Water System Master Plan Amendment
Clty of Lathrop
Lathrop. CA
environment ana20er202a czooae. m
water Figure 7- 1
273
Section 7
DISTRIBUTION SYSTEM HYDRAULIC CAPACITY EVALUATION
2024 WSMP Amendment
City of Lathrop
Table 7-1. Summary of Water Demands by Scenario
Demand Scenario
ADD ( a)
MDD ( b)
PHD ( c)
Existing
gpm
3, 272
5,62
8, 506
MGD
4. 7
8. 0
12. 2
Buildout ( 2045) (d)
gpm MGD
7, 691
13, 075
19, 996
11. 18. 8
28. 8
Notes:
a) Existing ADD is based on Table 4- 3 which includes the City' s 2022 billed water use. The buiidout average day demands are based on demand projections in Table 4-5 and a 5 percent unaccounted for water use factor to estimate total water use. b) MDD is calculated using a peaking factor of 1. 7 times the ADD. c) PHD is calculated by using a peaking factor of 2. 6 times the ADD. eki environment
water 7- 5
December 2024
EKI C20049. 01
274
1 River Islands Phase 2
X, Tank andBPS
BPS6
Tarik
Tumout
SSJID BPS - 5
2 Tank
f
LATHROP RD
SSJID
Turnout 1 I
LOUISE AV
LAWTF Tank and BPS
Q
Well 21 Tank,
land BF, S,
e~
YOSEMITE.,
epend
1 Sphere of Influence
Existing Infrastructure
lam. Treatment Plant
G Pump Station
Enclosed Storage Facility
0 SSJID Turnout
Pipe
Future Facilities
Pump Station
Enclosed Storage Facility
SSJID Turnout
Future Pipe Diameter, Inches
8 ---- 18
10 20
12 — 24
16 — 30
Abbreviations
BPS = booster pump station
tAWfF = Louise Avenue Water Treatment Facility
Sot = Sphere of Influence
SSJID = South San Joaquin Irrigation District
Notes
1. All locations are approximate.
Sources
1. Aerial photograph provided by ESRI' s ArcGIS
Online, 13 November 2024.
N 0 3, 000
A
Modeled Existing and Future Infrastructure
6, 000
Seale in Feet)
eki
Water System Master Plan Amendment
CO of Lathrop
Lathrop, CA
December 2024
environment C20049. 01
water Figure 7- 2
275
Section 7 2024 WSMP Amendment
DISTRIBUTION SYSTEM HYDRAULIC CAPACITY EVALUATION City of Lathrop
7. 4 Water Distribution System Performance Evaluation
The following sections discuss the hydraulic model results and distribution system deficiencies identified in each scenario.
7. 4.1 Existing System Evaluation
Existing scenario model simulations were evaluated to identify existing system deficiencies, as are discussed in the following sections.
Note that the existing scenario simulations were modeled with SSJID Turnout 1 flowing at 1, 381 gpm per the City' scurrent operations. The City currently uses the SSJID Turnout 1, LAWTF and storage tanks to meet peak demands, and then uses a combination of the LAWTF and the SSJID Turnouts 1 and 2 during off- peak hours to refill the storage tanks.
7. 4.1. PHD Results
Model results indicate that the existing system can meet minimum pressure criteria of 40 psi system -wide under PHD conditions. Modeled system pressures ranged from 44 psi to 60 psi, as shown on Figure 7-3.
Results show that velocities are elevated in the discharge lines from each of the BPSs. However, no modeled velocity in the distribution mains exceeds the maximum velocity criteria ( Figure 7-4). As shown in Figure 7-5, head losses exceed criteria in the discharge lines from BPS -5 and SSJID Turnout 1. As discussed in Section 6. 2.1, these exceedances do not necessarily indicate there is a problem unless the pipe velocity or head loss is contributing to pressure deficiencies.
7. 4.1.2 MDD Plus Fire Flow Results
Modeled fire flow availability and deficiencies are shown on Figure 7-6. Several locations cannot meet fire flow requirements, including:
Multiple hydrants in the commercial area near the intersection of Harlan Road and Lathrop Road.
Multiple hydrants in the CLSP along Dos Reis Road. As described in Section 7. 4.2., these deficiencies are addressed by planned future infrastructure to support development of the CLSP.
As such, no improvements were developed to address these deficiencies.
Multiple hydrants in the northern McKinley industrial area including areas bounded by W. Lathrop Road and Park street.
Multiple hydrants on South Harlan Road north of Lathrop Road and along Old Harlan Road south of Lathrop Road, which are addressed by future 8 -inch I-5 crossing, as discussed in Section 7. 4.2.
Two hydrants along Old Harland Road between Shilling Avenue and Lathrop Road.
Two hydrants off the 4 -inch and 6 -inch lines, serving residential areas of Historic Lathrop in the alley between 5th and 6th Streets.
Two hydrants in the Crossroads area on one dead end line along Murphy Road. The south deficiency is addressed in buildout scenario with additional supply from planned tank and BPS at the former Well 21 site. The north deficiency can be addressed by installing a new water main connecting the 10 -inch dead- end pipe on Murphy Road with the existing 12 -inch pipe on South Harlan Road.
eki environment
water 7-
December 2024
EKI C20049. 01
276
r.J
SSJID BPS - 5
Tumout 2
Tank
BPS - 2
Tank
LATHROP RD
SSJID
Tumout 1
LOUISE AV
LAWFF Tank and BPS
E
r '
YOSEMITE AU
Leaend
Sphere of Influence
Existing Infrastructure
Ikg Treatment Plant
W Pump Station
Enclosed Storage Facility
SSJID Tumout
Pipe
Junction Pressure, psi
Less than 40 ( Not Meeting Criteria)
40-5
O 45- 50
C 50-5
55- 65
Abbreviations
BpS = booster pump station
9pm = gallons per minute
LAWtF = Louise Avenue Water Treatment Facility
PHD = Peak Hour Demand
psi = pounds per square inch
SOI = Sphere of Influence
smo = South San Joaquin Irrigation District
Notes
1. All locations are approximate.
2. Well 9, Well 21, and Well 21 WTF are not active in the existing system analysis.
3. SSJID Turnout 1 is operating at 1, 381 gpm flow rate in the existing modeling scenario.
Sources
1. Aerial photograph provided by ESRI' sArcGIS Online,
13 November 2024.
N 0
A _
3, 000 6, 000
Scale , nFeet)
Existing Water System Hydraulic Evaluation
Peak Hour - Pressure
Water System Master Plan Amendment
Coy of Lathrop
Lathrop, CA
environment
December2024
C20046, 01
water Figure 7- 3
277
awe,
BP46
pTadk
BPS - 2
Tank
SSJID"
BPS - 5
Tumout 2
Tank
LATHROP AD
LOUISE A.
e
LAVVTF Tank and BPS
s
I
YOSEMITE or
eki
r.egend 1 Sphere of Influence
Existing Infrastructure
Treatment Plant
W Pump Station
Enclosed Storage Facility
SSJID Turnout
Pipe
Pipe Velocity, fps
Less than 4
4-6
Greater than 6 ( Not Meeting Criteria)
Abbreviations
BPS = booster pump station
a/ s = feet per second
gpm = gallons per minute
LAWTF = Louise Avenue Water Treatment Facility
PHD = Peak Hour Demand
O1 = Sphere of Influence
SSJID = South San Joaquin Irrigation District
Notes
1. 8,1 locations are approximate.
2. Well 9, Well 21, and Well 21 WTF are not active in the existing system analysis.
3. SSJID Turnout 1 is operating at 1, 381 gpm flow rate in the existing modeling scenario.
Sources
1. Aerial photograph provided by ESRI' s ArcGIS Online, 13 November 2024.
N o
A
3, 000 6, 000
Scale in Feel)
Existing Water System Hydraulic Evaluation
Peak Hour - Pipe Velocity
Water System Master Plan Amendment
City or Lathrop
Lathrop, CA
December 2024
environment C2004901
water Figure 7-4
278
BPS16
Tarick
SSJI [
BPS - 5
Turnout 2
Tank
BPS - 2
Tank
LATHROP FD
SSJID
Tumout 1 I
LOUISE AV
e
LAVVTF Tank and BPS
YOSEMITE AU
r,eoendSphere of Influence
Existing Infrastructure
Treatment Plant
C=J Pump Station
Enclosed Storage Facility
Ct SSJID Turnout
Pipe
Pipe Head Loss, ftlk-t
Less than 3
3-5
5-7
7- 10
Greater than 10
Pipe Head Loss Not Meeting Criteria
t • Head Loss Exceeds Requirement
Abbreviations
BPS = booster pump station
ft/ k-B = feet per thousand feet
gpm = gallons per minute
LAWTF = Louise Avenue Water Treatment Facility
PHD = Peak Hour Demand
SOI = Sphere of Influence
SSJID = South San Joaquin Irrigation District
Notes
1. All locations are approximate.
2. Well 9, Well 21, and Well 21 WTF are not active in the existing system analysis.
3. SSJID Turnout 1 is operating at 1, 381 gpm flow rate in the existing modeling scenario.
Sources
1. Aerial photograph provided by ESRI' s ArcGIS Online, 13 November 2024.
A _
3,000 6000
Scale in Feet)
Existing Water System Hydraulic Evaluation
Peak Hour - Pipe Head Loss
Water System Master Plan Amendment
Gilt' or Lathrop
Lathrop, CA
environment
een1cer2ovu
I & water
December
Figure 7-5
279
k
SSJID
Tumoutt
LAWIF Ta nk
and
BPS
YOSEMITE
A
Legend
1L7Sphere of Influence
Existing Infrastructure
Treatment Plant
Pump Station
Enclosed Storage Facility
Cti SSJID Turnout
Pipe
Available Fire Flow, Gallons per Minute
Less than 1250
C 1250 - 2000 C 2000 - 3000
3000 - 4000
iL Greater than 4000
Hydrant Residual Pressure Not Meeting Criteria
Residual Pressure Below Requirement
Abbreviations
BPS = booster pump station
gpm = gallons per minute
LAWTF = Louise Avenue Water Treatment Facility
5O1 = Sphere of Influence
SSJID = South San Joaquin Irrigation District
Notes
1. All locations are approximate.
2. Well 9, Well 21, and Well 21 WTF are not active in the existing system analysis.
3. SSJID Turnout
1 is operating at 1, 381 gpm flow rate
in the existing modeling scenario.
4. Evaluated with fire pumps online at booster pump
stations where effluent pressure drops below effluent
pressure set points.
Sources
1. Aerial photograph provided by ESRI' s ArcGIS Online, 13 November 2024. N o
A _
3, 000 6, 000
yule In Feet)
Existing Water System Hydraulic Evaluation
Maximum Day Demands - Available Fire Flow
Water System Master Plan Amendment
Cay of Lathrop
Lathrop, CA
December 2020
Ienvironment C20Dde. 01
water Figure 74
280
Section 7
2024 WSMP Amendment
DISTRIBUTION SYSTEM HYDRAULIC CAPACITY EVALUATION City of Lathrop
7. 4. 2 Future System Evaluation
Model results for the buildout scenario were evaluated to anticipate future system deficiencies. As discussed in Section 7.3, the sizes of facilities needed to support future development added to each scenario were verified by the modeling efforts. As such, the following sections discuss how future development and planned infrastructure improvements affect the existing water distribution system facilities.
Given the SSJID Turnout 1 is required to provide sufficient flow to meet demand conditions, the buildout PHD and MDD plus fire flow scenarios were modeled with SSJID Turnout 1 BPS operating at 3, 900 gpm i.e., 50% of buildout ADD) to conservatively mimic the City' s current operational scheme. Currently, the
City utilizes existing tanks, SSJID Turnout 1 ( operating at 1, 381 gpm), and the LAWTF to meet peak demands, and then utilizes SSJID Turnout 1 and LAWTF to refill tanks during the off- peak hours.
7. 4.2.1 PHD Results
Model results indicate that the system can meet minimum pressure criteria of 40 psi system -wide under PHD conditions at buildout, as shown on Figure 7-. Pressures at the nodes with potable water demand range from 44 psi to 62 psi.
Results show that velocities remain elevated near each of the BPSs in the future scenarios ( Figure 7-). As shown in Figure 7-, head losses exceed recommended normal operational head losses ( 7 ft/ k-tfor pipes smaller than 16 inches in diameter or 3 ft/ k-tfor pipes larger than 16 inches in diameter) in the discharge lines of multiple BPSs and SSJID Turnout 1. This exceedance does not necessarily indicate there is a problem unless the head loss is contributing to pressure deficiencies.
7. 4.2. MDD Plus Fire Flow Results
Modeled future fire flow availability and deficiencies are shown on Figure 7- 10. The existing fire flow deficiencies remain in the future scenarios, with exception of hydrants in CLSP which are addressed by future CLSP infrastructure improvements, hydrants on Old Harlan Road and Avon Avenue which are addressed by future I-5 crossing at Lathrop Road, and one hydrant on Murphy Road which is addressed by future tank and BPS at the former Well 21 site.
eki environment
water 7- 12
December 2024
EKI C20049. 01
281
k
BPS) 6
rTank
r
River Islands Phase2
Tank -ad BPS
LATHROP RD
SSJID
Turnout1 I
LOUISE AV
LAWTFTaTank nd BPS L
YOSEMITE AV
L, eoend
f, Sphere of Influence
Existing Infrastructure
Treatment Plant
Pump Station
Enclosed Storage Facility
SSJID Turnout
Pipe
Buildout Facilities
Pump Station
Enclosed Storage Facility
SSJID Turnout
Junction Pressure, psi
Less than 40 ( Not Meeting Criteria)
O 40-5 o 45- 50
50 - 55
55- 65
Abbreviations
BPS = booster pump station
gpm = gallons per minute
LAWTF = Louise Avenue Water Treatment Facility
PHD = Peak Hour Demand
psi = pounds per square inch
SOI = Sphere of Influence
SSJID = South San Joaquin Irrigation District
Notes
1. All locations are approximate.
2. Well 21 and Well 21 WTF is not active in the
buildout system analysis.
3. SSJID Tumout1 is operating at 3, 900 gpm flow rate
in the buildout modeling scenarios.
Sources
1. Aerial photograph provided by ESRI' sArcGIS Online,
13 November 2024. 0 3, 000 6, 000
Sule In Feel)
Buildout Water System Hydraulic Evaluation
Peak Hour - Pressure
Wafer System Master Plan Amendment
cay or Lathrop
Lathrop, CA
December
Q environment 01C20049.
i & water Figure 7-
282
River Islands Phase 2
Tank idBPS
BPS3- 6
Tank
r;
SSJID` J
BPS - 5
Turnout 2
Tank
LATHROP RD
SSJID
Turnout 1
OUISE A
IN
LAWTF Tank andd BPS
YOSEMITE AV
Well 21 Tank:
land BBS11.
f,egendSphere of Influence
Existing Infrastructure
PI Treatment Plant
Ex Pump Station
Enclosed Storage Facility
SSJID Turnout
Pipe
Buildout Facilities
Pump Station
Enclosed Storage Facility
SSJID Tumout
Pipe Velocity, fps
Less than 4
4-6
Greater than 6 ( Not Meeting Criteria)
Abbreviations
BpS = booster pump station
f/s = feet per second
gpm = gallons per minute
LAWTF = Louise Avenue Water Treatment Facility
PHD = Peak Hour Demand
SOI = Sphere of Influence
SSJID = South San Joaquin Irrigation District
Notes
1. All locations are approximate.
2. Well 21 is not active in the buildout system analysis.
3. SSJID Turnout 1 is operating at 3, 900 gpm flow rate in the buildout modeling scenarios.
Sources
1. Aerial photograph provided by ESRI' s ArcGIS Online, 13 November 2024.
N 0
az _
3, 000 6, 000
Soak in Feat)
Buildout Water System Hydraulic Evaluation
Peak Hour - Pipe Velocity
Water System Master Plan Amendment
City of Lathrop
Lathrop. CA
eki environment
December
C2004901
water Figure 7-8
283
River Islands RI -lase
2 Tan - dBPS
des
w'
SSJID
BPS- 5
Turnout2
Tank
i
J ``
BPS -2
Tank
SSJID '
Turnout1
ATHROP RD
LOUISE AV
LAWFF Tank
nd
BPS
Y0SEMITEA.
a® -
Well 21 Tank.
iand
Legend
CZ! Sphere of Influence
Existing Infrastructure
Ea' Treatment Plant
Pump Station
Enclosed Storage Facility
SSJID Turnout
Pipe
Buildout Facilities
Pump Station
Enclosed Storage Facility
SSJID Turnout
Pipe Head Loss, ft/ k-t
Less than3
3-5
5-7
7- 10
Greater than 10
Pipe Head Loss Not Meeting Criteria
aa Head Loss Exceeds Requirement
Abbreviations
BPS = booster pump station
ft/ k-t = feet per thousand feet
gpm = gallons per minute
LAWTF = Louise Avenue Water Treatment Facility
PHD = Peak Hour Demand
SOI = Sphere of Influence
SSJID = South San Joaquin Irrigation District
Notes
1. All locations are approximate.
2. Well 21 is not active in the buildout system analysis.
3. SSJID Turnout1 is operating at 3, 900 gpm flow rate
in the buildout modeling scenarios.
Sources
1. Aerial photograph provided by ESRI' s ArcGIS Online, 13 November 2024. N o
A _
3, 000 6, 000
Scale in Feet)
Buildout Water System Hydraulic Evaluation
Peak Hour - Pipe Head Loss
Water System Master Plan Amendment
City of Lathrop
Lathrop. CA
environment
December 20x4
C20069. 01
I & water Figure 7- 9
284
5 River Islands Vhase 2
Tank_ an -BPS
i
BPS) 6
rTank