Agenda — Santa Maria City Council, October 21, 2025 (part 1 of 4)

Mayor Alice Patino
Mayor Pro-Tem Carlos Escobedo
Councilmember Maribel Aguilera-Hernandez
Councilmember Gloria Flores
Councilmember Gloria Soto

CITY COUNCIL AGENDA

CITY OF SANTA MARIA, CALIFORNIA

CITY HALL
110 EAST COOK STREET

Tuesday, October 21, 2025
CLOSED SESSION - 4:30 P.M.

REGULAR SESSION - 5:30 P.M.

HOW TO ACCESS MEETINGS

1. Meetings can be viewed in video format alongside the on-line interactive agenda at https://www.cityofsantamaria.org/services/departments/city-clerk-records/agenda-center-meetingsportal.

2. The City of Santa Maria Broadcasts City Council Meetings Live on local Comcast Cable Channel 23, at cityofsantamaria.org/tv and on YouTube.com/@CityofSantaMariaCalifornia.

3. Closed Captioning is available in English and Spanish during City Council meetings on Comcast Cable Channel 23 and at cityofsantamaria.org/tv.

4. Meetings are replayed on local Comcast Cable Channel 23 and cityofsantamaria.org/tv on Thursdays at 9:00 a.m. and Tuesdays at 5:30 p.m. Meetings are available on demand at YouTube.com/@CityofSantaMariaCalifornia.

Attendance at public meetings may result in the streaming and recording of your image and/or voice.

AMERICANS WITH DISABILITIES ACT
In accordance with the Americans with Disabilities Act of 1990, if you require a disability-related modification or accommodation to attend or participate in this meeting, including auxiliary aids or services, please call the City Clerk’s Office at (805) 925-0951 extension 2306, or by email at [email protected] at least 48 hours before the meeting. Assisted Listening devices are available for those who attend in Council Chambers. Closed Captioning is available during meetings in English and Spanish on Comcast Channel 23 and at CityofSantaMaria.org/tv.

PUBLIC COMMENT (letters/emails)
(Must be received by 2:00 p.m. in advance of the meeting) Members of the public wishing to submit a public comment or a comment on an agenda item, can email [email protected] or mail to the City Council, Attn.: City Clerk's Office, 110 East Cook Street, Santa Maria, CA 93454. Letters/emails will not be read aloud during the meeting. All correspondence will be distributed to Councilmembers, submissions received after the deadline will not be processed until the following day but will become a part of the official record.

MEETINGS
The City Council holds regular meetings on the first and third Tuesday of every month. Regular meetings start at 5:30 p.m. in the Council Chambers at City Hall, 110 East Cook Street, Santa Maria, California. Special and Adjourned Regular meetings start time are to be determined.

POSTING LOCATIONS OF AGENDA AND/OR CANCELLATION NOTICES Regular meeting agendas will be posted at least 72 hours before the meeting (GC§ 54954(a)(1)).

Agenda and Cancellation Notices can be viewed online and are also posted at the following two locations: Santa Maria City Hall located at 110 East Cook Street, Santa Maria, California, and Santa Maria Public Library located at 421 South McClelland Street, Santa Maria, California.

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CLOSED SESSION

1. CALL TO ORDER
ROLL CALL: Councilmember Aguilera-Hernandez, Councilmember Flores, Councilmember Soto, Mayor Pro Tem Escobedo, and Mayor Patino

2. PUBLIC COMMENT PERIOD
Speakers may provide public comments on any matter within the subject matter jurisdiction of the City Council. Each speaker will be limited to 3 minutes, maximum 15 minutes for Public Comment Period. Unless a majority of the Council objects, the Mayor may provide speakers more or less time to speak. All comments or queries shall be addressed to the Council as a body and not to any specific member thereof. Pursuant to Government Code §54954.2(a)(2), the Ralph M. Brown Act, no action or discussion by the City Council shall be undertaken on any item not appearing on the posted agenda, except to briefly provide information, ask for clarification, provide direction to staff, or schedule a matter for a future meeting.

3. RECESS-CLOSED SESSION
The City Council will immediately recess to a closed session for the following:

3.a Conference with Legal Counsel - Existing Litigation pursuant to Government Code §54956.9 for the following case:

Name of Case: City of Santa Maria vs. California State Water Resources Control Board et al.

Case No.: 25CV-0136 in the Superior Court of the State of California for the County of San Luis Obispo.

3.b Conference with Legal Counsel - Existing Litigation Pursuant to Government Code §54956.9 for the following case:

Name of Case: Central Coast Water Authority et al. vs. Santa Barbara County Flood Control District et al.

Case No.: 21CV02432 in the Superior Court of California for the County of Santa Barbara.

3.c Conference with Legal Negotiators, Pursuant to California Government Code §54957.6
Agency Representatives: City Manager David W. Rowlands, City Attorney Tom Watson, Chief Human Resources Officer Graciela Reynoso, and Negotiations Team.

Employee Organizations: All bargaining units, unrepresented employees, managers, and executives.

3.d Conference with Legal Counsel - Anticipated Litigation, Pursuant to California Government Code §54956.9(d)(2)
Significant exposure to litigation - [one case]

3.e Public Employee Performance Evaluation, Pursuant to California Government Code §54957(b)(1)
Title: City Attorney

4. RECONVENE TO REGULAR SESSION
REGULAR SESSION - 5:30 P.M.

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5. INVOCATION

6. PLEDGE OF ALLEGIANCE

7. CALL TO ORDER
ROLL CALL: Councilmember Aguilera-Hernandez, Councilmember Flores, Councilmember Soto, Mayor Pro Tem Escobedo, and Mayor Patino

8. REPORT BY THE CITY ATTORNEY FROM CLOSED SESSION

9. PROCLAMATIONS

9.a Proclamation Proclaiming October 24, 2025, as World Polio Day The City Council will present a Proclamation recognizing October 24, 2025, as “World Polio Day” in the City of Santa Maria.

9.b Proclamation Proclaiming October 2025, as Arts and Humanities Month The City Council will present a Proclamation declaring October 2025 as Arts and Humanities Month in the City of Santa Maria to recognize the importance of arts and humanities in enhancing quality of life, promoting community identity, and supporting local culture and economy.

10. PRESENTATIONS

10.a GROW Initiative Cohort III ACCESS/ACCESO Program and Council to Present Certificates of Recognition
The City Council will receive a presentation regarding GROW Initiative Cohort III’s ACCESS/ACCESO program trial and present Certificates of Recognition to the GROW Initiative Cohort III graduates

10.b Presentation – Certificates of Recognition to the GROW Cohort IV The City Council will receive a presentation regarding GROW Initiative Cohort IV’s Paws in the Park capstone project and present Certificates of Recognition to the GROW Initiative Cohort IV graduates

11. PUBLIC COMMENT PERIOD (Not to exceed 15 Minutes)
Speakers may provide public comments on any matter within the subject matter jurisdiction of the City Council. Each speaker will be limited to 3 minutes, maximum 15 minutes for Public Comment Period. Unless a majority of the Council objects, the Mayor may provide speakers more or less time to speak. All comments or queries shall be addressed to the Council as a body and not to any specific member thereof. Pursuant to Government Code §54954.2(a)(2), the Ralph M. Brown Act, no action or discussion by the City Council shall be undertaken on any item not appearing on the posted agenda, except to briefly provide information, ask for clarification, provide direction to staff, or schedule a matter for a future meeting.

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12. CONSENT CALENDAR
Items on the consent calendar are considered to be routine and customary and are enacted by a single motion with the exception of items removed by a member of the City Council for individual consideration, which shall be individually considered immediately after taking action on the Consent Calendar.

RECOMMENDATION:

Adopt the Consent Calendar as submitted.

12.a CITY MANAGER/CITY CLERK DEPARTMENT

12.a.1 Ordinances and Resolutions
RECOMMENDATION:

Waive the reading in full of all Ordinances and Resolutions. Ordinances on the Consent Agenda will be adopted by the same vote cast at the first meeting, unless City Council indicates otherwise.

12.a.2 Approval of Minutes
RECOMMENDATION:

Approve the Minutes of the regular City Council meeting of September 16, 2025.

12.a.3 Approve Bond Releases for Centennial Square Planned Development No.

PD2020-0009
The City Council will consider authorizing various bond releases for Centennial Square Planned Development Permit No. 2020-0009 located at 360 East Plaza Drive.

Environmental Notice: The activity is not a “Project” as defined under Section 15378 of the California Environmental Quality Act State Guidelines; therefore, pursuant to State Guidelines Section 15060(c)(3) no environmental review is required.

RECOMMENDATION:

City Council to approve the release of various bonds in connection with Centennial Square Planned Development Permit No. 2020-0009 at 360 East Plaza Drive.

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12.a.4 Adoption of a Resolution Approving a Budget Amendment for Public, Education, and Government (PEG) for Several Audiovisual and Production Solutions for Fiscal Year 2025-26
The City Council will consider adopting a Resolution to increase the budget in the Public, Education, and Government (PEG) division of the City Manager’s Office by $100,000 toward several audiovisual and production solutions for fiscal year 2025-26replacing obsolete audiovisual system equipment in the tower production room to support
Environmental Notice: The activity is not a “Project” as defined under Section 15378 of the California Environmental Quality Act State Guidelines; therefore, pursuant to State Guidelines Section 15060(c)(3) no environmental review is required.

RECOMMENDATION:

Adopt a Resolution approving a budget amendment for Public, Education, and Government for an audiovisual and production solution project for Fiscal Year 2025-26.

12.a.5 Adoption of a Resolution Adding a Regular City Council Meeting on December 2, 2025, and Canceling the Regular City Council Meeting on December 16, 2025
The City Council will consider adding a regular City Council meeting on December 2, 2025, and canceling the regular City Council meeting on December 16, 2025.

RECOMMENDATION:

Adopt a Resolution adding a regular City Council meeting on December 2, 2025, and canceling the regular City Council meeting on December 16, 2025.

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12.b CITY ATTORNEY DEPARTMENT

12.b.1 Adoption of a Resolution Approving Execution of a Settlement Agreement and Related Support Documents in the Matter of City of Santa Maria vs. California State Water Resources Control Board
The City Council will consider adopting a Resolution authorizing the Mayor, or designee, to execute a Settlement Agreement and related supporting documents in the matter of City of Santa Maria vs. California State Water Resources Control Board et al. (Case No. 25CV-0136) and all related litigation, appropriation, and authorization of payment of settlement funds.

Environmental Notice: The Project qualifies for Class 6 and 7 Categorical Exemptions pursuant to Sections 15306 and 15307 of the California Environmental Quality Act (CEQA) State Guidelines.

RECOMMENDATION:

Adopt a Resolution approving the Settlement Agreement and related supporting documents in the matter of City of Santa Maria vs.

California State Water Resources Control Board et al. (Case No. 25CV-0136) and all related litigation, appropriation, and authorizing payment of settlement funds; and

1. Authorize the Mayor, or designee, to execute the Settlement Agreement and any related supporting documents.

2. 12.b.2 Adoption of Resolution Approving Execution of a Settlement Agreement and Related Support Documents in the Matter of Central Coast Water Authority et al. vs. Santa Barbara County Flood Control District et al.

The City Council will consider adopting a resolution approving a Settlement Agreement, and any related supporting documents necessary to effectuate the settlement of the matter of Central Coast Water Authority et al. vs. Santa Barbara County Flood Control District et al. (Case No. 21CV02432) and ratifying all prior signatures.

Environmental Notice: This action is not a project subject to the California Environmental Quality Act (CEQA) because it is an organizational or administrative activity that will not result in direct or indirect physical changes in the environment (CEQA Guideline Section 15378(b)(5)).

RECOMMENDATION:

Adopt a Resolution approving Settlement Agreement and any related supporting documents necessary to effectuate the settlement of the matter of Central Coast Water Authority et al. vs. Santa Barbara County Flood Control District et al. (Case No. 21CV02432) and ratifying all prior signatures; and

1. Authorize the Mayor, or designee, to execute the Settlement Agreement and any related supporting documents.

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12.c FINANCE DEPARTMENT

12.c.1 Payment of Payroll
RECOMMENDATION:

Order ratified subject to having been certified by the proper Department Directors, as shown on records on file in the Department of Finance, and having been approved for payment by the Director of Finance.

12.d PUBLIC WORKS DEPARTMENT

12.d.1 Adoption of Resolutions to Award Five Professional Services Agreement for On-Call Landscape Architecture and Site Design Services The City Council will consider approving the award of On-Call Landscape Architecture and Site Design Services Agreements to 1) Firma Consultants Inc., 2) Gates + Associates, 3) Hirsch and Associates Inc., 4) KTUA, and 5) Melton Design Group, Inc.

RECOMMENDATION:

Adopt a Resolution awarding a Professional Services Agreement to Firma Consultants Inc. for On-Call Landscape Architecture and Site Design Services in the amount of $300,000; and

1. Adopt a Resolution awarding a Professional Services Agreement to Gates + Associates for On-Call Landscape Architecture and Site Design Services in the amount of $300,000; and

2. Adopt a Resolution awarding a Professional Services Agreement to Hirsch and Associates Inc. for On-Call Landscape Architecture and Site Design Services in the amount of $300,000; and

3. Adopt a Resolution awarding a Professional Services Agreement to KTUA for On-Call Landscape Architecture and Site Design Services in the amount of $300,000; and

4. Adopt a Resolution awarding a Professional Services Agreement to Melton Design Group, Inc. for On-Call Landscape Architecture and Site Design Services in the amount of $300,000; and

5. 6. Authorize the City Manager, or designee, to execute all agreements.

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12.d.2 Adoption of a Resolution Approving the Donation of a Surplus Toro Small Ride-On Mower
The City Council will consider declaring a 2012 Toro GM3280-D Small RideOn Mower, Asset ID Number BA-0003052 (F438-12) (serial number 312000153), as surplus property and approving its donation to the Orcutt Youth Softball Association.

RECOMMENDATION:

Adopt a Resolution declaring a 2012 Toro GM3280-D Small Ride-On Mower, Asset ID Number (BA-0003052) (F438-12) (serial number 312000153), as surplus property and approving its donation to the Orcutt Youth Softball Association.

12.d.3 Adoption of a Resolution Authorizing a Lease Agreement with Central Coast Community Energy for Installation of Electric Vehicle Charging Stations at 418 South McClelland Street
The City Council will consider adopting a Resolution authorizing a lease agreement with Central Coast Community Energy for the installation of electric vehicle charging stations at 418 South McClelland Street.

Environmental Notice: The project qualifies for a Class 1 Categorical Exemption pursuant to Section 15301 – Existing facilities (operation, repair, maintenance, leasing, etc.) of the California Environmental Quality Act State Guidelines because the scope of work to be conducted is an existing public facility with negligible expansion of the existing uses.

RECOMMENDATION:

Adopt a Resolution authorizing a lease agreement with Central Coast Community Energy for the installation of electric vehicle charging stations at 418 South McClelland Street with the condition that the charging stations provide free, unrestricted public access twenty-four hours per day, seven days per week, year-round; and

1. 2. Authorize the City Manager, or designee, to execute agreement.

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12.d.4 Adoption of a Resolution Approving an Award of Bid to J.F. Will Company Inc. for the Pine Street Sewer Upgrades Project, Bid No. 2025-05, in the amount of $783,720.47 and Approving Agreement for Construction of said Project The City Council will consider approving an agreement and the award of Bid No. 2025-05 to The J.F. Will Company, Inc. for the construction of the Pine Street Sewer Upgrades Project. The project consists of installing approximately 462 feet of new 12-inch PVC gravity sewer along South Pine Street, replacing the existing 6-inch line, and crossing under the Santa Maria Valley Railroad tracks within a 20-inch steel casing. A new manhole will be constructed at West Boone Street, and the existing one will be abandoned. To maintain sanitary separation, the existing 10-inch ACP water main at West Boone Street will be replaced with a 10-inch ductile iron main, enabling installation of a new 60-inch diameter manhole at the intersection.

RECOMMENDATION:

Adopt a Resolution awarding a bid to The J.F. Will Company, Inc., for the construction of the Pine Street Sewer Upgrades Project, Bid No. 2025-05 in the amount of $783,720.47; and

1. Authorize City Manager, or designee, to execute agreement and approve Contract Change Orders so long as expenditures do not exceed funding approved for the project.

2. 12.d.5 Adoption of a Resolution Awarding a Bid to Hartzell General Engineering Contractor, Inc. and Approving an Agreement for Construction of Well 15 Equipping Project, Bid No. 2025-04
The City Council will consider approving the award of Bid No. 2025-04 to Hartzell General Engineering Contractor, Inc. for the construction of the Well 15 Equipping Project. The work to be performed under this contract consists of furnishing the necessary labor, materials, equipment, tools, and guarantees thereof to construct and equip Santa Maria Water Supply Well No. 15.

Environmental Notice: Environmental Review for this project was completed through the preparation of an Initial Study/Mitigated Negative Declaration for the City of Santa Maria Well 15 Special Project (SCH# 2024061097) pursuant to the California Environmental Quality Act State Guidelines.

RECOMMENDATION:

Adopt a Resolution awarding a bid to Hartzell General Engineering Contractor, Inc., and approving an agreement for the construction of the Well 15 Equipping Project, Bid No. 2025-04, in the amount of $4,343,870; and

1. 2. Authorize the City Manager, or designee, to execute the agreement.

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12.d.6 Adoption of a Resolution Approving the Award of a Professional Services Agreement to SZS Engineering Access, Inc. for the Americans with Disabilities Act (ADA) Self-Evaluation and Transition Plan Update The City Council will consider approving a resolution awarding a Professional Services Agreement to SZS Engineering Access, Inc. for the preparation of the City’s Americans with Disabilities Act (ADA) Self-Evaluation and Transition Plan Update.

Environmental Notice: The activity is not a “Project” as defined under Section 15378
of the California Environmental Quality Act State Guidelines; therefore, pursuant to
State Guidelines Section 15060(c)(3) no environmental review is required.

RECOMMENDATION:

Adopt a Resolution approving the award of a Professional Services Agreement to SZS Engineering Access, Inc. for the Americans with Disabilities Act Self-Evaluation and Transition Plan Update in the amount of $599,735; and

1. 2. Authorize the City Manager, or designee, to execute the agreement.

12.d.7 Adoption of a Resolution Amending Professional Services Agreement with Finance DTA for the Growth Mitigation Nexus Fee Update
The City Council will consider approving an amendment to the professional services agreement with Finance DTA.

RECOMMENDATION:

Adopt a Resolution amending professional services agreement KPW-2023-052 with Finance DTA extending the term and approving an additional amount of $30,990 for the Growth Mitigation Nexus Fee Update; and

1. 2. Authorize the City Manager, or designee, to execute agreement.

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12.d.8 Adoption of a Resolution Authorizing Final Payment and Reaffirmation of Santa Maria Regional Transit Electric Bus Purchase Through State Contracts The City Council will consider authorizing final payment and reaffirming to utilize State of California and State of Washington Electric Bus Consortium Contracts to complete the purchase of electric buses for Santa Maria Regional Transit.

RECOMMENDATION:

Adopt a Resolution authorizing execution of the final payment and reaffirmation to New Flyer and Gillig for the purchase of electric buses procured under the State of California and State of Washington Electric Bus Consortium Contracts that were active at the time of the original orders; and

1. Authorize the City Manager, or designee, to execute the final payment.

2. 12.d.9 Adoption of a Resolution Approving a Job Order Contract Agreement with Newton Construction & Management for the Wastewater Treatment Plant Metal Building Maintenance Project
The City Council will consider adopting a Resolution authorizing the Director of Public Works to execute a Job Order Contract Agreement with Newton Construction & Management for the Wastewater Treatment Plant Metal Building Maintenance Project in the amount of $449,122.36.

RECOMMENDATION:

Adopt a Resolution approving a Job Order Contract Agreement with Newton Construction & Management for the Wastewater Treatment Plant Metal Building Maintenance Project in the amount of $449,122.36; and

1. 2. Authorize the City Manager, or designee, to execute the agreement.

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12.e RECREATION & PARKS DEPARTMENT

12.e.1 Adoption of Resolution Approving Appropriation of Additional Funding and Award of Remaining Bid Alternatives for the Santa Maria Sports Complex Project
The City Council will consider approving the appropriation of an additional $5,530,000 and the award of remaining bid alternatives for the Santa Maria Sports Complex project using Growth Mitigation Program funds.

With respect to the Sports Complex project, a Final Supplemental Environmental Impact Report (SCH 1994107909) was prepared in connection with the Blosser-Southeast Specific Plan Amendment.

RECOMMENDATION:

Adopt a Resolution approving the appropriation of additional funding in the amount of $5,530,000 for the Santa Maria Sports Complex Project and the award of remaining bid alternatives for the Project; and

1. Authorize the City Manager, or designee, to take all actions necessary to allocate and expend the appropriated funds from designated grant and growth mitigation funds to the project.

2. 12.f UTILITIES DEPARTMENT

12.f.1 Adoption of a Resolution Authorizing a Communication Site License Agreement with T-Mobile West LLC and Easement Deed to Pacific Gas and Electric Company at Minami Park
The City Council will consider approving a Communication Site License Agreement with T-Mobile West LLC and an Easement Deed dedication to Pacific Gas and Electric Company at Minami Park.

Environmental Notice: Environmental Review: The project qualifies for a Class 3 Categorical Exemption pursuant to Section 15303 (New construction or conversion of small structures) of the California Environmental Quality Act (CEQA) State Guidelines.

RECOMMENDATION:

Adopt a Resolution authorizing a Communications Site License Agreement with T-Mobile West LLC and authorizing execution of an Easement Deed to Pacific Gas and Electric Company to provide electric service to the facility; and

1. 2. Authorize City Manager, or designee, to execute agreement.

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12.f.2 Adoption of a Resolution Approving an Agreement with Science Discovery for Solid Waste Education Services
The City Council will consider adopting a Resolution to approve an agreement with Science Discovery to provide solid waste-related school education services.

RECOMMENDATION:

Adopt a Resolution approving a Professional Services Agreement with Science Discovery for Solid Waste Education Services; and

1. Authorize the City Manager, or designee, to administer the agreement.

2. 12.f.3 Adoption of a Resolution Approving an Agreement with MNS Engineers, Inc. for Contract Administration and Inspection Services for the Water Supply Well 15 Equipping Project
The City Council will consider adopting a Resolution approving an agreement with MNS Engineers, Inc. for contract administration and inspection services for the Water Supply Well 15 Equipping Project.

RECOMMENDATION:

Adopt a Resolution approving an agreement with MNS Engineers, Inc. for Contract Administration and Construction Inspection Services for the Water Supply Well 15 Equipping Project; and

1. 2. Authorize the City Manager, or designee, to execute agreement.

13. APPOINTMENTS

13.a Continued from the September 16, 2025, City Council Meeting - Appointment to the Recreation and Parks Commission
The City Council will consider making an appointment to the Recreation and Parks Commission.

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14. PUBLIC HEARING
ORDER OF PROCEEDINGS FOR PUBLIC HEARING ITEMS:

Council Agenda Report to be given.

Applicant/Appellant comments.

Questions from the City Council.

Written communications/Public input.

Public hearing to be closed.

City Council discussion and action.

14.a Approval of an Ordinance Amending Title 12 “Zoning,” Chapter 12-56 “Accessory Dwelling Units” of the City of Santa Maria Municipal Code The City Council will consider the adoption of an Ordinance amending Title 12 – Zoning, Chapter 12-56, Accessory Dwelling Units, of the City of Santa Maria Municipal Code.

Environmental Notice: The proposed Zoning Text Amendments are statutorily exempt from the requirements of the California Environmental Quality Act (CEQA) per Public Resources Code Section 21080.17 and by Government Code Section 66499.41(i).

RECOMMENDATION:

Waive the first reading and introduce an Ordinance Amending Title 12 “Zoning,” Chapter 12-56 “Accessory Dwelling Units” of the City of Santa Maria Municipal Code; and

1. 2. Set for adoption at the next regular City Council meeting.

15. REGULAR BUSINESS
ORDER OF PROCEEDINGS FOR REGULAR BUSINESS ITEMS:

Council Agenda Report to be given.

Questions from the City Council.

Written communications/Public input.

City Council discussion and action.

15.a 2025 Leisure Needs and Public Art Five-Year Master Plan The City Council will receive a presentation on the results of the 2025 Leisure Needs Assessment and Public Art Master Plan. This document will serve as a reference for future leisure and arts planning efforts by the City. After the presentation this document will be filed.

15.b Continued from the September 16, 2025, City Council Meeting - Discussion on a Request to Form an Immigration Ad Hoc Committee
The City Council to discuss a request to form an Immigration Ad Hoc Committee.

16. REPORT BY CITY MANAGER

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17. ORAL REPORTS OF COUNCILMEMBERS AND OFFICERS (INCLUDING AB 1234

REPORTS)

18. ADJOURNMENT
Meeting will be adjourned in memory of Herbert Bolton, former City of Santa Maria Fire Fighter and William "Bill" Spears Sr. former City of Santa Maria Police Sergeant and former City of Willows Chief of Police.

If you challenge a determination made on a matter on this agenda in court, you may be limited to raising only those issues you or someone else raised at the public hearing described on this agenda, or in written correspondence to the city council at, or prior to, the public hearing.

I, Donna G. Schwartz, hereby certify under penalty of perjury under the laws of the State of California that the foregoing agenda was posted not less than 72 hours at the following locations: City of Santa Maria City Hall and Library and made available at https://www.cityofsantamaria.org/services/departments/city-clerk-records/agenda-centermeetings-portal on this 17th day of October 2025. /s/ DONNA G. SCHWARTZ, CMC
Chief Deputy City Clerk

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COUNCIL AGENDA REPORT
TO: Mayor and City Council
FROM: David W. Rowlands, City Manager
DATE: October 21, 2025
SUBJECT: Proclamation Proclaiming October 24, 2025, as World Polio Day The City Council will present a Proclamation recognizing October 24, 2025, as “World Polio Day” in the City of Santa Maria.

BACKGROUND:

In 1985 Rotary International (Rotary) initiated the PolioPlus program aimed at eradicating polio in the world. At that time poliovirus was present in 125 countries, paralyzing an estimated 1,000 children per day. In 1988, the Global Polio Eradication Initiative joined forces with Rotary.

Rotary International and the Rotary Clubs of the Santa Maria Valley and Nipomo have been engaged in a 37-year campaign to eradicate Polio worldwide. When Rotary began its mission to eradicate polio more than 350,000 children in 125 countries were stricken with polio every year, and nearly 1,000 people were affected by the crippling disease every day. Since then, polio cases have been reduced by over 99 percent to only 14 cases in 2024. Public Awareness, advocacy, and funding remain crucial to Rotary and its partners, the World Health Organization, the U.S. Centers for Disease Control and Prevention, and UNICEF.

Attachment: Proclamation – World Polio Day 2025
City of Santa Maria
Santa Maria, California
Proclamation
WHEREAS, Rotary International and the Rotary Clubs of the Santa Maria Valley & Nipomo have been engaged in a 37-year campaign to eradicate Polio worldwide; and WHEREAS, Rotary brings 120 years of history to this initiative. Its members are business, professional and community leaders who provide humanitarian service, encourage high ethical standards, and help build goodwill and peace in the world. Over 35,000 Rotary clubs located in more than 200 countries and geographical areas build coalitions and initiate service projects to address today’s challenges, including illiteracy, disease, hunger, poverty, lack of clean water, and environmental concerns; and
WHEREAS, when Rotary began its mission to eradicate polio more than 350,000 children in 125 countries were stricken with polio every year, and nearly 1,000 people were affected by the crippling disease every day. Since then, polio cases have been reduced by over 99% to only 14 new cases in 2024; and
WHEREAS, today only two countries – Afghanistan and Pakistan - remain polioendemic. Due to the efforts of Rotary and its partners, the world is on the threshold of ending polio forever, making it only the second disease after smallpox to be eradicated; and WHEREAS, public awareness, advocacy and funding remain crucial to Rotary and its partners, the World Health Organization, the U.S. Centers for Disease Control and Prevention, and UNICEF;.

NOW, THEREFORE, I ALICE M. PATINO, Mayor of the City of Santa Maria, hereby proclaim October 24, 2025, as:
“World Polio Day”
in the City of Santa Maria.

IN WITNESS WHEREOF, I have hereunto set my hand and have caused the Seal of the City of Santa Maria to be affixed hereto this 21st day of October 2025. ______________________________
Alice M. Patino, Mayor

COUNCIL AGENDA REPORT
TO: Mayor and City Council
FROM: Alex Posada, Recreation and Parks Director
DATE: October 21, 2025
SUBJECT: Proclamation Proclaiming October 2025, as Arts and Humanities Month
The City Council will present a Proclamation declaring October 2025 as Arts and Humanities Month in the City of Santa Maria to recognize the importance of arts and humanities in enhancing quality of life, promoting community identity, and supporting local culture and economy.

BACKGROUND:

Each October, National Arts and Humanities Month is observed across the United States to celebrate the vital role that the arts and humanities play in our society. The month promotes public awareness and participation in arts and cultural programming, as well as the value these efforts contribute to education, civic engagement, and economic development.

The City of Santa Maria supports this national observance through ongoing investments in public art, cultural partnerships, and arts programming, particularly through the work of the Recreation and Parks Department.

DISCUSSION:

The City of Santa Maria is home to a vibrant arts and humanities community that continues to thrive through public engagement, cultural diversity, and creative expression.

The Recreation and Parks Department has been instrumental in leading the City’s public art initiatives, completing its first five-year Master Art Plan and receiving recognition from the Santa Barbara County Board of Supervisors in 2024 for outstanding contributions to public art and quality of life improvements for residents.

Recent accomplishments include the completion of multiple community murals, the expansion of the City’s utility box art program, and the integration of cultural displays in new public facilities such as the Japanese Community Center and Veterans’ Memorial Park. These efforts reflect the City’s commitment to enhancing civic spaces and fostering a shared community identity through the arts.
2 The attached Proclamation declares October 2025 as Arts and Humanities Month in the City of Santa Maria. Staff recommend the City Council present the proclamation during the Council meeting and encourage residents to participate in and support local arts and cultural events throughout the month.

Proclamation Requested by: Dennis Smitherman, Recreation Services Manager Attachment(s): Proclamation
City of Santa Maria
Santa Maria, California
Proclamation
WHEREAS, the City of Santa Maria recognizes the essential role of the arts and humanities in cultural, educational, and economic vitality; and WHEREAS, they provide opportunities for creative expression, foster inclusivity, and celebrate diverse perspectives and traditions; and
WHEREAS, Santa Maria’s vibrant public art program, including murals, sculpture, and cultural programming, enhances civic spaces, promotes dialogue, and beautifies the City; and WHEREAS, recent highlights include utility box art, community murals, and integrating art into public spaces such as the Japanese Community Center and Veterans’ Memorial Park; and
WHEREAS, the City remains committed to promoting the arts as vital to youth development, community health, tourism, and economic growth; and WHEREAS, October is nationally recognized as Arts and Humanities Month, honoring creative and cultural contributions that shape our collective identity and daily lives.

NOW, THEREFORE, I, ALICE M. PATINO, Mayor of the City of Santa Maria hereby proclaim October 1 through October 31, 2025, as
“ARTS AND HUMANITIES MONTH”
in the City of Santa Maria and encourage all residents to explore, engage with, and support the arts and humanities through participation in events, programs, and partnerships throughout our community.

IN WITNESS WHEREOF, I have hereunto set my hand and have caused the Seal of the City of Santa Maria to be affixed hereto this 21st day of October, 2025. ______________________________
Alice M. Patino, Mayor

COUNCIL AGENDA REPORT
TO: Mayor and City Council
FROM: Chuen Wu, Assistant City Manager
DATE: October 21, 2025
SUBJECT: GROW Initiative Cohort III ACCESS/ACCESO Program and Council to Present Certificates of Recognition
The City Council will receive a presentation regarding GROW Initiative Cohort III’s ACCESS/ACCESO program trial and present Certificate of Recognitions to the GROW Initiative Cohort III graduates
BACKGROUND:

The City partnered with the University of California, Santa Barbara Professional and Continuing Education, to offer a professional certificate program on Management Training for Public Administrators. During the timeframe the program was offered from 2023 to 2024, four cohorts graduated, each creating capstone projects.

Known as GROW, the State-funded 15-week programs were designed to equip City employees with the knowledge and skills to build and lead high-performing teams, strategically make decisions, and manage a capstone project to have a positive impact on the City organization and with community benefit.

DISCUSSION:

GROW Cohort III created a capstone project named ACCESS/ACCESO (Assist, Connect, Communicate, Engage, Support, Serve/Auyudar, Conectar, Comunicar, Entablar, Servir, Ofrecer). This proposed program is designed to further enhance the City’s ongoing bilingual community outreach efforts.

ACCESS/ACCESO would support the current Language Access Plan and the City Council goals of City workforce development and to improve quality of life. The proposed program would proactively deliver/demonstrate information about City programs and services, by bilingual staff and volunteer ambassadors, to residents at various in-person locations throughout the City - including in each City Council District – such as laundromats, grocery stores, and parks.

It is envisioned to take place year-round, run by designated and trained department liaisons, a volunteer coordinator, and volunteer ambassadors. The Cohort also developed a tracking and reporting app for use during in-person interactions. The objective is for 2 ACCESS/ACCESSO staff to enter who and where they are and record the type of information that is being requested. This information is summarized in a database.

To test the program’s viability, Cohort members staffed a table at two different Farmers Markets and tracked interactions (at least one bilingual staff member was present). Over the two days (two hours per day), there were 92 interactions, with 29 of them ending in questions (48 interactions the first day, 42 the second day). Staff fielded questions ranging from water, downtown plans, Recreation registration, recycling, street repairs, and code enforcement. Staff received positive feedback from residents, who stated they appreciated seeing City staff at an event. Testing phase proved successful with 31.5 percent of the interactions ending in questions.

COUNCIL AGENDA REPORT
TO: Mayor and City Council
FROM: David W. Rowlands, City Manager
DATE: October 21, 2025
SUBJECT: Presentation –Certificate of Recognition to the GROW Cohort IV The City Council will receive a presentation regarding GROW Initiative Cohort IV’s Paws in the Park capstone project and present Certificates of Recognition to the GROW Initiative Cohort IV graduates
BACKGROUND:

DISCUSSION:

GROW Cohort IV created a capstone project named Paws in the Park. This proposed event is designed to provide resources and education to promote responsible pet ownership so more pets can stay happy and healthy and with their families. The target audience for this event are current and prospective pet owners in Santa Maria.

The event would provide free educational pet health resources, tools to comply with local laws and ordinances related to domestic animals, and resources for responsible and safe pet ownership. There will be pet training and health vendors, local non-profits, and other animal-related agencies at the event to provide resources and information.

It is envisioned to take place annually, run by designated and trained department liaisons, in conjunction with external stakeholders and vendors to support the event. The first event is tentatively planned for late spring of 2026 to help pet parents ensure their pets are safe during fireworks season.
1 CITY COUNCIL MEETING MINUTES CITY OF SANTA MARIA, CALIFORNIA September 16, 2025, 5:30 p.m.

City Hall Council Chambers
110 East Cook Street
Santa Maria
Roll Call: Councilmember Maribel Aguilera-Hernandez, Councilmember Gloria Flores, Councilmember Gloria Soto, Mayor Pro Tem Carlos Escobedo, Mayor Alice Patino
Staff Present: City Manager David W. Rowlands, Assistant City Manager Chuen Wu, City Attorney Thomas Watson, Director of Finance Rebecca Campbell, Fire Chief Bradley Dandridge, Director of Community Development Chenin Dow, Director of Public Works Brett Fulgoni, Library Director Dawn Jackson, Business Manager Neville Smeda, Chief Human Resources Officer Graciela Reynoso, Director of Utilities Shad Springer, Police Chief Christopher Williams, Chief Deputy City Clerk Donna Schwartz, Assistant City Clerk Alexandra Valadez, Deputy City Clerk Ashley Arciniega
_____________________________________________________________________

CLOSED SESSION

1. CALL TO ORDER
At 4:39 p.m., Mayor Patino called the meeting to order.

ROLL CALL:

MEMBERS PRESENT:

Councilmember Aguilera-Hernandez, Councilmember Flores, Councilmember Soto, Mayor Pro Tem Escobedo, and Mayor Patino.

Councilmember Aguilera-Hernandez arrived at 4:45 p.m. Mayor Pro Tem Escobedo arrived at 4:57 p.m.

STAFF MEMBERS PRESENT:

City Manager David W. Rowlands, City Attorney Thomas Watson and Chief Deputy City Clerk Donna G.

Schwartz.

2. PUBLIC COMMENT PERIOD
Mayor Patino opened public comment, there being none, closed public comment.

3. RECESS-CLOSED SESSION
At 4:40 p.m. Mayor Patino recessed to Closed Session.

3.a Conference with Labor Negotiators, Pursuant to California Government Code §54957.6

3.b Public Employee Performance Evaluation, Pursuant to California Government Code §54957(b)(1) Title: City Attorney

4. RECONVENE TO OPEN SESSION
2 OPEN SESSION - 5:30 P.M.

5. INVOCATION
Pastor Neil Platon from First United Methodist Church gave the Invocation.

6. PLEDGE OF ALLEGIANCE
Councilmember Flores led the Pledge of Allegiance.

7. CALL TO ORDER
Mayor Patino called the meeting to order at 5:42 p.m.

Councilmember Aguilera-Hernandez did not attend open session.

8. REPORT BY THE CITY ATTORNEY FROM CLOSED SESSION
City Attorney Watson reported that discussions were made with representatives. No further report.

9. PROCLAMATIONS

9.a Proclamation Proclaiming September 16, 2025, as National Voter Registration Day The City Council presented a Proclamation to Lisa Thornhill, Second Vice President of League of Women Voters of North Santa Barbara County, recognizing September 16, 2025, as "National Voter Registration Day" in the City of Santa Maria.

9.b Proclamation Proclaiming September 2025, as Library Card Sign-up Month The City Council presented a Proclamation to Hunter Jameson, Library Board of Trustee, recognizing the month of September 2025 as Library Card Sign-up Month in the City of Santa Maria.

9.c Proclamation Proclaiming October 5 through October 11, 2025, as Fire Prevention Week The City Council presented a Proclamation to Jim Austin, Fire Marshall, recognizing the week of October 5 through 11, 2025, as "Fire Prevention Week" in the City of Santa Maria.

9.d Proclamation Proclaiming October 6 through 12, 2025, as Active Aging Week 2025 The City Council presented a Proclamation to Doreen Worrell, declaring October 6 through October 12, 2025, as Active Aging Week in the City of Santa Maria to recognize the essential services, programs, and community events provided by the Recreation and Parks Department and partners.

9.e Proclamation Proclaiming September 12, 2025, as AVID Day The City Council presented a Proclamation to Robin Ilac, Instructional Coach and AVID Site Coordinator at El Camino Jr. High School, recognizing September 12, 2025, as "AVID Day" in the City of Santa Maria.

10. PRESENTATIONS

10.a Businesses of the Quarter – July to September 2025 The City Council presented certificates to the featured Businesses of the Quarter (July to September 2025) - Benedetti & Associates, CPA, Inc., accepted by Trent Benedetti and M&W Pumps, Inc. accepted by Frank and Lisa Morales.

11. PUBLIC COMMENT PERIOD (Not to exceed 15 Minutes)
Mayor Patino invited public comment. Speaking from the public was Francisca Camarillo, Andrew Foster, and Gary Hall.
3 12. CONSENT CALENDAR
Consent Calendar Items 12.a.1 through 12.e.16 (except 12.a.2) were approved as presented, including the adoption of Resolution Nos. 2025-137, 2025-138, 2025-139, 2025-140, 2025-141, 2025-142, 2025- 143, 2025-144, 2025-145, 2025-146, 2025-147, 2025-148, 2025-149, 2025-150, 2025-151, 2025-152, 2025-153, 2025-154, 2025-155, 2025-156, 2025-157, 2025-158, 2025-159, 2025-160, 2025-161, 2025- 162, 2025-163, and 2025-164. The recorded vote appears with each item below.

Mayor Patino requested to pull item 12.e.11 for discussion.

Mayor Pro Tem Escobedo requested a separate vote for item 12.a.2.

Moved by: Councilmember Soto
Seconded by: Councilmember Gloria Flores
Adopt the Consent Calendar as submitted.

Ayes (4): Councilmember Gloria Flores, Councilmember Soto, Councilmember Escobedo, and Mayor Patino
Absent (1): Councilmember Aguilera-Hernandez
Motion carried by a recorded vote (4 to 0)

12.a CITY MANAGER/CITY CLERK DEPARTMENT

12.a.1 Ordinances and Resolutions
Moved by: Councilmember Soto
Seconded by: Councilmember Gloria Flores
Waive the reading in full of all Ordinances and Resolutions. Ordinances on the Consent Agenda will be adopted by the same vote cast at the first meeting, unless City Council indicates otherwise.

Motion carried by a recorded vote

12.a.2 Approval of Minutes
Moved by: Councilmember Soto
Seconded by: Councilmember Gloria Flores
Approved the Minutes of the regular City Council meeting of August 5, 2025, special City Council meeting of August 12, 2025, and special City Council meeting of September 2, 2025.

Ayes (3): Councilmember Gloria Flores, Councilmember Soto, and Mayor Patino Abstain (1): Councilmember Escobedo
Absent (1): Councilmember Aguilera-Hernandez
Motion carried by a recorded vote (3 to 0)

12.a.3 Adoption of a Resolution Canceling the Regular City Council Meeting on Tuesday, October 7, 2025
Action: Adopted as Resolution No. 2025-137.

Moved by: Councilmember Soto
Seconded by: Councilmember Gloria Flores
Adopted a Resolution canceling the regular City Council meeting on Tuesday, October 7, 2025.

Motion carried by a recorded vote
4 12.a.4 Designation of Voting Delegate and Alternate for the 2025 League of California Cities Annual Conference
Moved by: Councilmember Soto
Seconded by: Councilmember Gloria Flores
Approved the designation (by motion) of Mayor Alice M. Patino as the Voting Delegate and City Manager David W. Rowlands as the alternate for the League of California Cities Annual Conference (League).

Motion carried by a recorded vote

12.a.5 Adoption of a Resolution Approving the First Amendment to Memorandum of Understanding between the City of Santa Maria and the Service Employees International Union Local 620, February 20, 2024 – December 31, 2025
Action: Adopted as Resolution No. 2025-138.

Moved by: Councilmember Soto
Seconded by: Councilmember Gloria Flores

1. Adopted a Resolution authorizing and approving the First Amendment to the Memorandum of Understanding between the City of Santa Maria and the Service Employees International Union Local 620, February 20, 2024 – December 31, 2025; and

2. Authorized City Manager or designee to execute Memorandum of Understanding.

Motion carried by a recorded vote

12.b COMMUNITY DEVELOPMENT DEPARTMENT

12.b.1 Community Development Block Grants Final Consolidated Annual Performance and Evaluation Report for the 2024-2025 Fiscal Year
Moved by: Councilmember Soto
Seconded by: Councilmember Gloria Flores
Received and filed information regarding the Consolidated Annual Performance and Evaluation Report for the 2024-25 Fiscal Year.

Motion carried by a recorded vote

12.b.2 Adoption of a Resolution Awarding a Professional Services Agreement to City Detect for the Use of Artificial Intelligence (AI) Technology in Code Enforcement Activities Action: Adopted as Resolution No. 2025-139.

Moved by: Councilmember Soto
Seconded by: Councilmember Gloria Flores

1. Adopted a Resolution awarding a Professional Services Agreement to City Detect for the use of artificial intelligence (AI) technology in code enforcement activities in the amount of $66,000 annually; and

2. Authorized City Manager, or designee, to execute agreement.

Motion carried by a recorded vote
5 12.c FINANCE DEPARTMENT

12.c.1 Payment of Warrants
Moved by: Councilmember Soto
Seconded by: Councilmember Gloria Flores
Order ratified subject to having been certified as being in conformity with the budget and having been approved for payment by the Director of Finance.

Motion carried by a recorded vote

12.c.2 Payment of Payroll
Moved by: Councilmember Soto
Seconded by: Councilmember Gloria Flores
Order ratified subject to having been certified by the proper Department Directors, as shown on records on file in the Department of Finance, and having been approved for payment by the Director of Finance.

Motion carried by a recorded vote

12.d POLICE DEPARTMENT

12.d.1 Adoption of a Resolution Approving an Agreement with the City of Guadalupe for the Provision of Emergency Dispatch, Radio, and IT Services Action: Adopted as Resolution No. 2025-140.

Moved by: Councilmember Soto
Seconded by: Councilmember Gloria Flores

1. Adopted a Resolution approving an Agreement with the City of Guadalupe for the provision of emergency dispatch, radio, and IT services; and

2. Authorized City Manager, or designee, to execute agreement.

Motion carried by a recorded vote

12.e PUBLIC WORKS DEPARTMENT

12.e.1 Adoption of a Resolution Establishing a Proposed No Stopping Zone on Main Street (State Route 166) at the intersection of Depot Street
Action: Adopted as Resolution No. 2025-141.

Moved by: Councilmember Soto
Seconded by: Councilmember Gloria Flores
Adopted a Resolution establishing a No Stopping Zone on Main Street (State Route 166) at the intersection of Depot Street.

Motion carried by a recorded vote
6 12.e.2 Adoption of a Resolution Establishing a Proposed No Stopping Zone on Main Street (State Route 166) at the intersection of Pine Street
Action: Adopted as Resolution No. 2025-142.

Moved by: Councilmember Soto
Seconded by: Councilmember Gloria Flores
Adopted a Resolution establishing a No Stopping Zone on Main Street (State Route 166) at the intersection of Pine Street.

Motion carried by a recorded vote

12.e.3 Adoption of a Resolution Establishing a Proposed No Stopping Zone on Main Street (State Route 166) at the intersection of Russell Avenue
Action: Adopted as Resolution No. 2025-143.

Moved by: Councilmember Soto
Seconded by: Councilmember Gloria Flores
Adopted a Resolution establishing a No Stopping Zone on Main Street (State Route 166) at the intersection of Russell Avenue.

Motion carried by a recorded vote

12.e.4 Adoption of Resolutions to Award Two Professional Services Agreement For On-Call Construction Stormwater Inspection Services
Action: Adopted as Resolution No. 2025-144 and 2025-145.

Moved by: Councilmember Soto
Seconded by: Councilmember Gloria Flores

1. Adopted a Resolution awarding a Professional Services Agreement to Tetra Tech, Inc. for On-Call Construction Stormwater Inspection Services in the amount of $500,000; and

2. Adopted a Resolution awarding a Professional Services Agreement to Trihydro for On-Call Construction Stormwater Inspection Services in the amount of $500,000; and

3. Authorized City Manager, or designee, to execute agreements.

Motion carried by a recorded vote
7 12.e.5 Adoption of Resolutions to Award Four Professional Services Agreements for On-Call Construction Management and Inspection Services
Action: Adopted as Resolution No. 2025-146, 2025-147, 2025-148, and 2025-149.

Moved by: Councilmember Soto
Seconded by: Councilmember Gloria Flores

1. Adopted a Resolution awarding a Professional Services Agreement to Cannon Corporation for On-Call Construction Management and Inspection Services in the amount of $300,000; and

2. Adopted a Resolution awarding a Professional Services Agreement to Filippin Engineering, Inc. for On-Call Construction Management and Inspection Services in the amount of $300,000; and

3. Adopted a Resolution awarding a Professional Services Agreement to MNS Engineers, Inc. for On-Call Construction Management and Inspection Services in the amount of $300,000; and

4. Adopted a Resolution awarding a Professional Services Agreement to Wallace Group for On-Call Construction Management and Inspection Services in the amount of $300,000; and

5. Authorized City Manager, or designee, to execute agreements.

Motion carried by a recorded vote

12.e.6 Adoption of a Resolution Awarding a Bid to G. Sosa Construction, Inc. and Approving an Agreement for Phase III of the Enos Ranch Project, Bid No. 2025-07 Action: Adopted as Resolution No. 2025-150.

Moved by: Councilmember Soto
Seconded by: Councilmember Gloria Flores

1. Adopted a Resolution awarding an agreement to G. Sosa Construction, Inc. for the construction of Phase III of the Enos Ranch Project, Bid No. 2025-07 in the amount of $1,343,540.80; and

2. Authorized City Manager, or designee, to execute agreement.

Motion carried by a recorded vote

12.e.7 Adoption of Resolutions Awarding Professional Services Agreements for On-Call Right of Way Appraisal Services
Action: Adopted as Resolution No. 2025-151 and 2025-152.

Moved by: Councilmember Soto
Seconded by: Councilmember Gloria Flores

1. Adopted a Resolution awarding a Professional Services Agreement to BBG, Inc. for On-Call Right-of-Way Appraisal Services in the amount of $300,000; and

2. Adopted a Resolution awarding a Professional Services Agreement to Hamner, Jewell & Associates for On-Call Right-of-Way Appraisal Services in the amount of $300,000; and

3. Authorized City Manager, or designee, to execute agreements.

Motion carried by a recorded vote
8 12.e.8 Adoption of Resolutions to Award Four Professional Services Agreement for On-Call Geotechnical Engineering and Materials Testing Services Action: Adopted as Resolution No. 2025-153, 2025-154, 2025-155, and 2025-156.

Moved by: Councilmember Soto
Seconded by: Councilmember Gloria Flores

1. Adopted a Resolution awarding a Professional Services Agreement to Achievement Engineering Corp. for On-Call Geotechnical Engineering and Materials Testing Services in the amount of $300,000; and

2. Adopted a Resolution awarding a Professional Services Agreement to Earth Systems Pacific for On-Call Geotechnical Engineering and Materials Testing Services in the amount of $300,000; and

3. Adopted a Resolution awarding a Professional Services Agreement to EnGeo for On-Call Geotechnical Engineering and Materials Testing Services in the amount of $300,000; and

4. Adopted a Resolution awarding a Professional Services Agreement to Krazan and Associates for On-Call Geotechnical Engineering and Materials Testing Services in the amount of $300,000; and

5. Authorized City Manager, or designee, to execute agreements.

Motion carried by a recorded vote

12.e.9 Adoption of a Resolution Awarding a Professional Services Agreement for Resident Engineer, Construction Management, and Inspection Services for the Santa Maria Sports Complex Project
Action: Adopted as Resolution No. 2025-157.

Moved by: Councilmember Soto
Seconded by: Councilmember Gloria Flores

1. Adopted a Resolution awarding a Professional Services Agreement to Filippin Engineering, Inc. for Resident Engineer, Construction Management, Inspection Services for the Santa Maria Sports Complex in the amount of $1,425,638.60; and

2. Authorized City Manager, or designee, to execute agreement.

Motion carried by a recorded vote

12.e.10 Adoption of a Resolution Approving a Transit “Ride Free” Fare Promotion Reimbursement Agreement with Santa Barbara County Association of Governments Action: Adopted as Resolution No. 2025-158.

Moved by: Councilmember Soto
Seconded by: Councilmember Gloria Flores

1. Adopted a Resolution approving a Transit Fare Promotion Reimbursement Agreement with the Santa Barbara County Association of Governments; and

2. Authorized the City Manager, or designee, to execute agreement and administer administrative and immaterial changes as needed during the life of the agreement.

Motion carried by a recorded vote
9 12.e.11 Adoption of a Resolution Approving a Memorandum of Understanding with the San Luis Obispo Council of Governments and the City of San Luis Obispo for a Pilot Route Express Transit Service between Santa Maria and San Luis Obispo Action: Adopted as Resolution No. 2025-159.

Moved by: Councilmember Soto
Seconded by: Councilmember Gloria Flores

1. Adopted a Resolution approving a Memorandum of Understanding with the San Luis Obispo Council of Governments and the City of San Luis Obispo for a pilot express transit service between Santa Maria and San Luis Obispo; and

2. Authorized City Manager, or designee, to execute the Memorandum of Understanding.

Motion carried by a recorded vote

12.e.12 Adoption of a Resolution Authorizing the Execution of a Master Agreement and Program Supplements for State-Funded Transit Projects with the California Department of Transportation (Caltrans) For Transit and Intercity Rail Capital Program (TIRCP) Funds Action: Adopted as Resolution No. 2025-160.

Moved by: Councilmember Soto
Seconded by: Councilmember Gloria Flores

1. Adopted a Resolution authorizing the execution of a Master Agreement, and Program Supplements for State-Funded Transit Projects with the California Department of Transportation (Caltrans); and

2. Authorized City Manager, or designee, to execute agreement.

Motion carried by a recorded vote

12.e.13 Adoption of a Resolution Authorizing Energy Efficiency Project for Facility Led Lighting Upgrades at Various City Facilities
Action: Adopted as Resolution No. 2025-161.

Moved by: Councilmember Soto
Seconded by: Councilmember Gloria Flores
Adopted a Resolution authorizing Energy Efficiency Project Work Order for LED lighting upgrades at various City Facilities in an amount not to exceed $3,882,718, under Pacific Gas and Electric Company’s (PG&E) Sustainable Solutions Turnkey Program and authorize the City Manager to execute the PG&E On-Bill Financing loan agreement.

Motion carried by a recorded vote
10 12.e.14 Adopt a Resolution Approving the Project List for Fiscal Year 2025-26 for the California State of Good Repair Program and Authorize the Submittal of a Grant Application for the Purchase of Digital Signage from Daktronics to Support the Transit Program Action: Adopted as Resolution No. 2025-162.

Moved by: Councilmember Soto
Seconded by: Councilmember Gloria Flores

1. Adopted a Resolution approving the project list for Fiscal Year 2025-26 for the California State of Good Repair Program; and

2. Authorized City Manager, or designee, to submit a grant application for the purchase of digital signage from Daktronics to support the transit program.

Motion carried by a recorded vote

12.e.15 Adoption of a Resolution Approving Final Map and Subdivision Improvement Agreement for Bellecrest Residences, Tract 6040
Action: Adopted as Resolution No. 2025-163.

Moved by: Councilmember Soto
Seconded by: Councilmember Gloria Flores
Adopted a Resolution approving the Subdivision Improvement Agreement and the recordation of the Final Map for Bellecrest Residences, Tract 6040.

Motion carried by a recorded vote

12.e.16 Adoption of a Resolution Amending Contract with MOVE Santa Barbara County Action: Adopted as Resolution No. 2025-164.

Moved by: Councilmember Soto
Seconded by: Councilmember Gloria Flores

1. Adopted a Resolution amending the contract with MOVE Santa Barbara County for Pedestrian and Bicycle Safety Professional Services in the amount of $120,065; and

2. Authorized City Manager, or designee, to execute agreement.

Motion carried by a recorded vote

13. APPOINTMENTS

13.a Appointment to the Recreation and Parks Commission Item continued to the October 21, 2025, City Council meeting. 11 14. PUBLIC HEARING

14.a Adoption of Resolution Approving Community Development Block Grant Priorities Funding for Fiscal Year 2026-2027
Community Programs Manager Rosie Rojo gave the presentation.

Mayor Patino opened the public hearing at 6:38 p.m., there being none, closed public comment.

Action: Adopted as Resolution No. 2025-165.

Moved by: Councilmember Escobedo
Seconded by: Councilmember Gloria Flores

1. Adopted a Resolution approving the Community Development Block Grant priorities for Fiscal Year 2026-27 funding process; and

2. Approved the use of Fiscal Year 2026-27 CDBG Capital funding for two City projects.

Ayes (4): Councilmember Gloria Flores, Councilmember Soto, Councilmember Escobedo, and Mayor Patino
Absent (1): Councilmember Aguilera-Hernandez
Motion carried by a recorded vote (4 to 0)

14.b Adoption of Resolutions Authorizing Use of Bond Opportunities for Land Development Program and Authorizing the City of Santa Maria to Join the Statewide Community Infrastructure Program Director of Community Development Chenin Dow gave the presentation.

Mayor Patino opened the public hearing at 6:44 p.m.

One written public comment was received by Erik Justesen.

Mayor closed the public hearing at 6:44 p.m.

Action: Adopted as Resolution No. 2025-166 and 2025-167.

Moved by: Councilmember Escobedo
Seconded by: Councilmember Gloria Flores

1. Adopted a Resolution authorizing the use of the Bond Opportunities for Land Development (BOLD) program and authorizing the California Municipal Finance Authority to accept applications from property owners, conduct proceedings and levy special taxes within the City of Santa Maria pursuant to the Mello-Roos Community Facilities of 1982, as amended; and authorizing related actions; and

2. Adopted a Resolution authorizing the City of Santa Maria to join the Statewide Community Infrastructure Program (SCIP), authorize the California Statewide Communities Development Authority to accept applications from property owners, conduct special assessment proceedings and levy assessments and special taxes and to form assessment districts and community facilities districts within the territory of the City of Santa Maria; embodying a joint community facilities agreement setting forth the terms and conditions of community facilities district financing; approving form of acquisition agreement for use when applicable, and to authorize related actions.

Ayes (4): Councilmember Gloria Flores, Councilmember Soto, Councilmember Escobedo, and Mayor Patino
Absent (1): Councilmember Aguilera-Hernandez
Motion carried by a recorded vote (4 to 0)
12 15. REGULAR BUSINESS

15.a Discussion on a Request to Form an Immigration Ad Hoc Committee Item continued to the October 21, 2025, City Council meeting.

Mayor Patino invited public comment. Speaking from the public was Cynthia Lara, Brenda Garcia, Guinevere Kent, Teresa Suarez, Lorena, Jonathan Arenas Leon, Esperanza, Haley, Michelle Ambriz, Patricia Solorio, Elena Magana, Abby Hogan, Miranda Perez Lopez, Savannah Belunza, Elvia Salazar, Erica Diaz-Cervantes, Armanda Santiago, Raul Olivera, Sergio Castillo, Saul Martinez, Cliff Solomon, AJ Joven, Mariela Vazquez, Brandon Vasquez, Reynaldo Rodriguez, and (FIRST NAME) Valencia.

Written public comments were also received by Sergio Castillo, Hunter Jameson, Lata Murti, Teresa Suarez, and Fernando Martinez.

15.b Adoption of a Resolution Approving a New Employment Agreement Between the City of Santa Maria and David Wayne Rowlands
Item continued to the October 21, 2025, City Council meeting.

Written public comment was received by Carol Ogburn.

16. REPORT BY CITY MANAGER
City Manager Rowlands announced that the October 7th City Council meeting has been cancelled. The next City Council meeting is scheduled for October 21st, with agenda items including the Award of the Americans with Disabilities Act Transition Plan, Award of the Pine Street Sewer Project, Municipal Code Amendments regarding Accessory Dwelling Units, continued appointments to the Recreation and Parks Commission, and continued discussion on the request to establish an Immigration Ad Hoc Committee.

The November 4th City Council Meeting would include items on the agenda, such as the Quarterly Reports for the Chamber of Commerce.

17. ORAL REPORTS OF COUNCILMEMBERS AND OFFICERS (INCLUDING AB 1234 REPORTS) Councilmember Flores announced attending the Annual Day of Hope event, the CommUnify Board meeting, Serve Santa Maria, and the September 11th Tribute.

Councilmember Escobedo shared he attended the Annual Day of Hope event and the 9-11 Tribute.

Councilmember Aguilera-Hernandez - Absent.

Councilmember Soto reported she attended the Special City Council Meeting on September 2, 2025.

Mayor Patino noted she attended the following: Jury Duty, the Livable California Teleconference, Special City Council Meeting on September 2, 2025, Sherriff's Project Opioid Event, League of California Cities Roundtable Event for Mayors and Councilmembers, Developer Impact Fees Workshop, Santa Barbara County Association of Governments Meeting, Air Pollution Control District Meeting, Day of Hope Car Show, EconoAlliance Presidents Council Event, Annual Day of Hope, Local Agency Formation Commission Meeting, Serve Santa Maria, 3rd Annual Hancock Honors Celebration, and the 9-11Tribute.

18. ADJOURNMENT
There being no further business before the City Council, Mayor Patino declared the City Council meeting adjourned at 7:49 p.m.

Chief Deputy City Clerk Alice M. Patino, Mayor

COUNCIL AGENDA REPORT
TO: Mayor and City Council
FROM: Donna G. Schwartz, Chief Deputy City Clerk
DATE: October 21, 2025
SUBJECT: Approve Bond Releases for Centennial Square Planned Development No. PD2020-0009
Description:

The City Council will consider authorizing various bond releases for Centennial Square Planned Development Permit No. 2020-0009 located at 360 East Plaza Drive.

RECOMMENDATION:

City Council to approve the release of various bonds in connection with Centennial Square Planned Development Permit No. 2020-0009 at 360 East Plaza Drive.

BACKGROUND:

The Public Improvements as required by the Centennial Square Planned Development Permit No. PD2020-0009 dated July 21, 2021.

DISCUSSION:

At the request of the developer, inquiries were sent to various departments on August 26, 2025, requesting authorization to release the following bonds:
 Faithful Performance Bond – Public Improvements [#4460132] in the full amount of $975,638.73 posted in the form of a surety to guarantee public improvements; and order that the Labor and Material Bond in the amount of $487,819.37 and the Guarantee and Defective Material Bond in the amount of $97,563.87 be retained for six months and one year, respectively from the date of the release of the Faithful Performance Bond for public improvements.
 Faithful Performance Bond – Public Landscaping [#4460134] in the full amount of $66,122.00 posted in the form of a surety to guarantee public improvements to install public landscaping, and order that the Labor and Material Bond in the amount of $33,061.00 and the Guarantee and Defective Material Bond in the amount of $6,612.20 be retained for six months and one year, respectively from the date of release of the Faithful Performance Bond for public landscaping.

Full releases were granted by each department.

COUNCIL AGENDA REPORT
TO: Mayor and City Council
FROM: Chuen Wu, Assistant City Manager
DATE: October 21, 2025
SUBJECT: Adoption of a Resolution Approving a Budget Amendment for Public, Education, and Government (PEG) for Several Audiovisual and Production Solutions for Fiscal Year 2025-26
Description:

The City Council will consider adopting a Resolution to increase the budget in the Public, Education, and Government (PEG) division of the City Manager’s Office by $100,000 toward several audiovisual and production solutions for fiscal year 2025-26, replacing obsolete audiovisual system equipment in the tower production room to support.

RECOMMENDATION:

Adopt a Resolution approving a budget amendment for Public, Education, and Government for an audiovisual and production solution project for Fiscal Year 2025-26.

BACKGROUND:

The City of Santa Maria receives specific PEG revenues paid by Comcast Cablevision.

These special revenues are separate from General Fund revenues.

In September 2025, the City’s supplier notified staff that certain products in use have reached obsolescence and replacement parts will no longer be available. Without purchasing an upgrade, the City would be unable to continue said operations.

DISCUSSION:

The project is to replace obsolete audiovisual system equipment in the tower production room to support all three Santa Maria Community Television TV channels and web streaming; purchase one network switch for a connected project at the Public Library’s Shepard Hall; purchase replacement components in a server room, upgraded camera equipment for the city hall council chambers, and; purchase a multi-terabyte server for video editing and storage.
2 This will maintain and enhance public meeting transparency as part of Santa Maria’s Smart City, Safe City strategic plan to improve the quality of life, access, and provide a safe environment for City employees.

The PEG revenues received from Comcast are for capital projects.

Fiscal Considerations
The requested $100,000 is available in the PEG fund balance.

Impact on the Community
The solution will maintain and enhance the City’s three community access TV channels, continue public participation in and transparency of City public meetings, improve the City’s ability to record staff training events, provide PEG members with a studio space, and enable users of Shepard Hall to widely share their meetings and thus expand programming on Santa Maria Community Television.

ATTACHMENT(S)
A. Resolution
Attachment A
RESOLUTION NO.

A RESOLUTION OF THE CITY COUNCIL

OF THE CITY OF SANTA MARIA, CALIFORNIA

APPROVING A BUDGET AMENDMENT FOR PUBLIC,

EDUCATION, AND GOVERNMENT FOR AN AUDIOVISUAL

AND PRODUCTION SOLUTION PROJECT FOR
FISCAL YEAR 2025-26
WHEREAS, the City of Santa Maria receives Public, Education, and Government (PEG) funding from Comcast Cablevision for capital projects; and WHEREAS, it is recommended to amend the 2025-26 budget for subsequent appropriations, actions, and costs as determined to be in the public’s best interest.

NOW, THEREFORE, IT IS HEREBY RESOLVED by the City Council of the City of Santa Maria, California, as follows:

SECTION 1. Increase appropriations by $100,000 in the Public, Education, and Government division for several audiovisual and production solutions; and SECTION 2. The Chief Deputy City Clerk is hereby authorized to make minor changes herein to address clerical errors, so long as substantial conformance of the intent of this document is maintained. In doing so, the Chief Deputy City Clerk shall consult with the City Manager and City Attorney concerning any changes deemed necessary.

PASSED AND ADOPTED at a regular meeting of the City Council of the City of Santa Maria, California, held this 21st day of October 2025.

ATTEST:

Chief Deputy City Clerk
Mayor
APPROVED AS TO FORM:
_______________________________
City Attorney
APPROVED AS TO CONTENT:
_______________________________
Department Director
_______________________________
City Manager

COUNCIL AGENDA REPORT
TO: Mayor and City Council
FROM: David W. Rowlands, City Manager
DATE: October 21, 2025
SUBJECT: Adoption of a Resolution Adding a Regular City Council Meeting on December 2, 2025, and Canceling the Regular City Council Meeting on December 16, 2025
Description:

The City Council will consider adding a regular City Council meeting on December 2, 2025, and canceling the regular City Council meeting on December 16, 2025.

RECOMMENDATION:

Adopt a Resolution adding a regular City Council meeting on December 2, 2025, and canceling the regular City Council meeting on December 16, 2025.

BACKGROUND:

Section 2-1.01 of the Santa Maria Municipal Code sets the time, day, and place for holding City Council meetings to discuss items of City business. The City Council has the authority to cancel meetings due to a lack of quorum or lack of business items.

DISCUSSION:

The City Council approved a regular meeting schedule for 2025 on December 17, 2024.

The calendar did not include a regular meeting on December 2, 2025, but did include a meeting on December 16, 2025.

Alternative(s)
The City Council can decide not to add the December 2, 2025, regular meeting or cancel the December 16, 2025, meeting and meet as scheduled on the previously approved calendar.

Fiscal Considerations
There is no foreseeable fiscal impact as a result of this agenda item. 2 Impact on the Community
Staff does not anticipate an impact on the community for the addition of the December 2, 2025, City Council meeting or the cancellation of the December 16, 2025, City Council meeting.

ATTACHMENT(S)
A. Resolution – Add December 2, 2025, and Cancel the December 16, 2025, City Council Meeting Attachment A

Page 1 of 2 ends

RESOLUTION NO.

A RESOLUTION OF THE CITY COUNCIL OF THE

CITY OF SANTA MARIA, CALIFORNIA,

ADDING A REGULAR CITY COUNCIL MEETING ON DECEMBER
2, 2025, AND CANCELING THE REGULAR CITY COUNCIL
MEETING ON DECEMBER 16, 2025
WHEREAS, the City Council meets on a regular schedule twice a month, on the first and third Tuesdays; and
WHEREAS, the City Council has the authority to cancel meetings when necessary; and
WHEREAS, The City Council approved a regular meeting schedule for 2025 on December 17, 2024. The calendar did not include a regular meeting on December 2, 2025, but did include a meeting on December 16, 2025.

NOW, THEREFORE, IT IS HEREBY RESOLVED by the City Council of the City of Santa Maria, California, as follows:

SECTION 1. A regular City Council meeting on Tuesday, December 2, 2025, at 5:30 p.m. has been added; and
SECTION 2. The regular City Council meeting scheduled for Tuesday, December 16, 2025, at 5:30 p.m. has been canceled; and
SECTION 2. The Chief Deputy City Clerk is hereby authorized to make minor changes herein to address clerical errors, so long as substantial conformance of the intent of this document is maintained. In doing so, the Chief Deputy City Clerk shall consult with the City Manager and City Attorney concerning any changes deemed necessary. //
//
//
Attachment A

Page 2 of 2 ends

PASSED AND ADOPTED at a regular meeting of the City Council of the City of Santa Maria, California, held this 21st day of October 2025.

ATTEST:

COUNCIL AGENDA REPORT
TO: Mayor and City Council
FROM: Tom Watson, City Attorney
DATE: October 21, 2025
SUBJECT: Adoption of a Resolution Approving Execution of a Settlement Agreement and Related Support Documents in the Matter of City of Santa Maria vs. California State Water Resources Control Board Description:

The City Council will consider adopting a Resolution authorizing the Mayor, or designee, to execute a Settlement Agreement and related supporting documents in the matter of City of Santa Maria vs. California State Water Resources Control Board et al. (Case No. 25CV-0136) and all related litigation, appropriation, and authorization of payment of settlement funds.

Environmental Notice: The Project qualifies for Class 6 and 7 Categorical Exemptions pursuant to Sections 15306 and 15307 of the California Environmental Quality Act (CEQA) State Guidelines.

RECOMMENDATION:

1. Adopt a Resolution approving the Settlement Agreement and related supporting documents in the matter of City of Santa Maria vs. California State Water Resources Control Board et al. (Case No. 25CV-0136) and all related litigation, appropriation, and authorizing payment of settlement funds; and

2. Authorize the Mayor, or designee, to execute the Settlement Agreement and any related supporting documents.

BACKGROUND:

Between 1949 to 1987 SEMCO Twist Drill and Tool Company (“SEMCO”) operated its precision tool manufacturing business at 2936 Industrial Parkway, Santa Maria, California which used a petroleum hydrocarbon-based lubricant and volatile organic compounds, such as trichloroethane in its operations. In approximately 1985, these compounds were detected in a nearby water well during testing by the City of Santa Maria. Following detection of these compounds in the well and a subsequent report by the city to the Santa Barbara County Public Health Department, the well was closed. In 1987, following closure of the well, the California Regional Water Quality Control Board, Central Coast Region (“Regional Board”) issued a Cleanup and Abatement Order (“CAO”) to SEMCO and its successors in interest for ongoing monitoring and remediation of the site. Despite the issuance of this CAO, the CAO was not completed to existing environmental standards or to the satisfaction of the Regional Board and on April 27, 2023, the Regional 2 Board issued its intent to issue a second CAO to the Santa Maria Public Airport District, County of Santa Barbara and City of Santa Maria based upon the fact that all three (3) entities owned the land between 1949 and 1968 while SEMCO rented the location for its business operations. Despite a lack of any evidence that the City of Santa Maria or other public entities had knowledge or control over SEMCO’s business safety or environmental protection practices, the Regional Board issued a new CAO (No. R3-2023-0070) on September 23, 2023. The new CAO included the successors in interest of the SEMCO property along with the public entities (including the City) based solely on the prior ownership of the property for the cleanup and monitoring of the site. Initial cost estimates for the complete implementation of the second CAO exceeded $25 million dollars.

Following issuance of the September 26, 2023, CAO all public entities submitted a timely administrative appeal to the State Water Resources Control Board (“State Board”) which is the entity that oversees Regional Board decisions. The State Board did not respond to the administrative appeals which functioned as a denial of the appeals as a matter of law pursuant to the Water Code. Due to the lack of administrative relief from the State Board, all public entities challenged the Regional Water Boards issuance of the CAO by filing separate Petitions for Writs of Mandate requesting the California Superior Court to independently review and invalidate the Regional Boards issuance of the CAO against the public entities based upon a lack of evidence connecting the entities to the practices of SEMCO which led to the condition of the site.

Based upon the facts of the case as challenged by all public entities along with input from independent engineering and environmental consultants, the Regional Board and public entities entered negotiations in the spring of 2025 to seek an informal resolution that would ensure proper site remediation while limiting the cost to the public entities. On April 17, 2025, the Regional Board and the public entities reached a tentative agreement on basic settlement terms for the resolution of this matter. Following this tentative agreement, the parties have worked through legal counsel, along with professional environmental engineers and consultants to create a detailed formal settlement agreement which sets forth an agreeable site work plan for monitoring and remediation which limits the cost to the public entities.

DISCUSSION:

The County of Santa Barbara received title to real property which contained the SEMCO site in June 1949 following conveyance from the US Army. Shortly thereafter the County conveyed one half of its interest in the real property to the City of Santa Maria where it was held by the City and County as tenants in common until 1964 when it was conveyed to the newly formed Santa Maria Public Airport District. Thus far in the litigation, the only link between the City of Santa Maria (and other public entities) to the SEMCO site is the ownership of the land. Accordingly, the only connection between SEMCO and the City of Santa Maria was a landlord/tenant relationship. However, although there is a strong argument that the lack of evidence connecting the city with any knowledge, direction or control over the SEMCO operation favors its position in the litigation, the uncertainty of litigation combined with the costs including expert witnesses, testing fees and laboratory 3 analysis favors strong consideration of settlement if an agreement can be reached at reasonable costs and conditions.

The initial agreement between the parties as contained in the Settlement Agreement requires a monitoring and remediation plan of the site through two (2) technical work plans which specify a Soil Vapor Extraction (“SVE”) and Deep Groundwater Zone Assessment and Monitoring. Upon final execution of the Settlement Agreement by all parties which is anticipated to occur in October 2025, the Regional Board will Stay enforcement of the Cleanup and Abatement Order as to the public entities, and the public entities will dismiss their respective Petitions for Writs of Mandate (without prejudice) currently pending in the Superior Court. The parties will then work collaboratively to achieve the goals of the remediation and monitoring work plans which will be implemented by the environmental engineering firm Langan, CA, Inc. and monitored by Santa Barbara County and its separate environmental engineering consultants. Under the terms of the Settlement Agreement, the City of Santa Maria and County of Santa Barbara are committed to the remediation, monitoring and reporting requirements for a period of twenty-four (24) months or until the work plan goals are achieved. The settlement agreement requires a financial contribution by the City of Santa Maria of $437,500.00 which will be used to pay for its share of the settlement work. If completion of the work plans does not fully meet the agreed upon remediation and monitoring standards, additional costs will be shared equally between the City of Santa Maria and the County of Santa Barbara. Any additional charges require joint pre-approval by the city and county.

This settlement brings certainty by substantially reducing the financial impact to the city by reducing its potential financial obligation in cleanup costs, ongoing court, legal, and expert fees initially estimated at $25 million to just over $1 million. Settlement also demonstrates a commitment to the prioritization of the safety of our community through environmental cleanup efforts of the former SEMCO site. If approved, the settlement is expected to be completed within twenty-four (24) months and upon completion will result in a Release of Liability as to the current Order, the removal of the public entities as site dischargers, a dismissal (with prejudice) of the litigation and an enforceable commitment by the Regional Board to take no further action against the city or other public entities in this matter.

The City Attorney’s Office has worked closely throughout this litigation with legal counsel for the County of Santa Barbara and Public Airport District and recommends the approval of this settlement including appropriation and authorization of payment of the related funding. The County and Airport District have approved the proposed settlement terms and are prepared to execute the settlement agreement and related documents. If the Settlement Agreement is approved, the parties will also execute related documents which are attached hereto which reflect further terms to carry out the settlement including two (2) written Work Plans produced by Langan in consultation with professional environmental engineering consultants and the Regional Board which are incorporated into the Settlement Agreement setting forth the technical details of the remediation and monitoring requirements for project completion.
4 Alternative(s)
The alternatives to settlement of this case are continuing litigation efforts against the Regional Board through the city’s pending Petition for Writ of Mandate in the San Luis Obispo Superior Court, or a dismissal of the challenge to the Order with a full commitment to completing the original Cleanup Order. Completing the CAO as originally ordered is not only unfair to the city and its residents as there is no evidence that the city caused or contributed to this pollution, but the monetary costs are very large as previously articulated. Continued litigation is also costly and uncertain. If the City completely prevails in litigation, mounting legal costs including court fees, expert witness fees and environmental consultants could cost hundreds of thousands of dollars or more.

Additionally, pursuant to section 13305 of the California Water Code, if the subject property were to become nonoperational while containing an ongoing condition of pollution or nuisance and the owner does not or cannot correct the condition, the Regional Board can request the city and county perform the abatement or cleanup of the condition.

Accordingly, even if the city prevails, the Regional Board could seek further assistance in cleaning up the site under certain conditions.

Fiscal Considerations
As part of any settlement agreement reached in this case, the city currently has $635,643.04 available from the initial $800,000.00 committed to resolve this matter.

Based upon initial environmental testing and consultant recommendations which have been tentatively approved by the Regional Board, the settlement amount to resolve this matter is $437,500.00.

Impact on the Community
The proposed settlement terms will limit the liability of the City by performing cleanup and monitoring of the site for a limited period and at a certain and limited cost to the city while prioritizing the health and safety of the community.

Other Agency Review
The Utilities Department has worked with the City Attorney’s Office throughout this litigation and is aware of the tentative settlement terms and agrees that the terms of this proposed settlement is the best alternative currently available to the City of Santa Maria.

ATTACHMENT(S)
A. Resolution
B. Settlement Agreement (w/attached work plans)
Attachment A

Page 1 of 3 ends

RESOLUTION NO.

A RESOLUTION OF THE CITY COUNCIL

OF THE CITY OF SANTA MARIA, CALIFORNIA

APPROVING THE SETTLEMENT AGREEMENT AND RELATED

SUPPORTING DOCUMENTS IN THE MATTER OF CITY OF SANTA MARIA VS. CALIFORNIA STATE WATER RESOURCES CONTROL BOARD ET AL.

CASE NO. 25CV-0136 AND ALL RELATED LITIGATION, AND

APPROPRIATION, AND AUTHORIZING PAYMENT OF SETTLEMENT FUNDS WHEREAS, between 1949 to 1987 SEMCO Twist Drill and Tool Company (“SEMCO”) operated its precision tool manufacturing business at 2936 Industrial Parkway, Santa Maria, California which used a petroleum hydrocarbon-based lubricant and volatile organic compounds, such as trichloroethane in its operations; and WHEREAS, in 1985, these compounds were detected in a nearby water well during testing by the City of Santa Maria. Following detection of these compounds and a subsequent report by the city to the Santa Barbara County Public Health Department, the well was closed; and
WHEREAS, in 1987, following closure of the well, the California Regional Water Quality Control Board, Central Coast Region (“Regional Board”) issued a Cleanup and Abatement Order (“CAO”) to SEMCO and its successors in interest for ongoing monitoring and remediation of the site. Despite the issuance of this CAO, the CAO was not completed to existing environmental standards or to the satisfaction of the Regional Board; and
WHEREAS, on April 27, 2023, the Regional Board issued its intent to issue a second CAO to the Santa Maria Public Airport District, County of Santa Barbara and City of Santa Maria based upon the fact that all three (3) entities owned the land between 1949 and 1968 while SEMCO rented the location for its business operations; and WHEREAS, on September 23, 2023 the Regional Board issued a new CAO (No.

R3-2023-0070) to the successors in interest of the SEMCO property along with the City, County and Airport District as the previous owners of the land for the cleanup and monitoring of the site; and
WHEREAS, following issuance of the September 26, 2023, CAO all public entities appealed issuance of the CAO to the State Water Resources Control Board (“State Board”) based upon a lack of evidence connecting the public entities to the environmental practices of SEMCO. The State Board denied the appeal and the City along with the other public entities challenged the Regional Water Boards issuance of the CAO by filing a Petition for Writ of Mandate in this lawsuit requesting the California Superior Court to independently review and invalidate the Regional Boards issuance of the CAO against them based upon a lack of evidence connecting the entities to the practices of SEMCO which led to the condition of the site; and
Attachment A

Page 2 of 3 ends

WHEREAS, on April 17, 2025, the Regional Board, City and other public entities reached a tentative agreement on settlement terms for the resolution of this lawsuit.

Following the tentative agreement, the parties have worked through legal counsel, along with professional environmental engineers and consultants to create a detailed formal settlement agreement which sets forth agreeable site work plans for monitoring and remediation while limiting the cost to the public entities; and WHEREAS, under the terms of the proposed settlement agreement the City of Santa Maria will contribute $437,500.00 which will be used to pay for its share of the settlement work as set forth by the environmental consultant retained by the city, county and airport district and tentatively approved by the Regional Board. If completion of the work plans does not fully meet the agreed upon remediation and monitoring standards, additional costs will be shared equally between the City of Santa Maria and the County of Santa Barbara. Any additional charges require joint pre-approval by the city and county; and
WHEREAS, upon settlement the parties agree to dismiss all litigation, suspend the Cleanup and Abatement Order as to the public entities, implement the terms of the settlement agreement including completion of the environmental work plans, and upon achieving the remediation and monitoring standards, the City along with the other public entities will be removed as dischargers under the CAO and no further action will be required; and
WHEREAS, the terms of this settlement have been tentatively approved by the County of Santa Barbara and Public Airport District and based upon the facts and information known to the City of Santa Maria, legal counsel recommends accepting the terms of this settlement as the most favorable legal outcome and cost control for this matter and requests appropriation and authorization for the payment of the City of Santa Maria’s payment obligations under the agreement; and
NOW, THEREFORE, BE IT RESOLVED by the City Council of the City of Santa Maria, California, as follows:

SECTION 1. The above recitals are true and correct and incorporated herein by reference.

SECTION 2. The mayor, or designee, is authorized to enter into the settlement agreement for this case by fully executing the Settlement Agreement and all supporting documents necessary to effectuate settlement in the matter of City of Santa Maria vs.

California State Water Resources Control Board et al. (Case No. 25CV-0136) and all related litigation. The settlement funds are herby appropriated and payment of the city’s portion of the settlement contribution is authorized.

SECTION 3. The Chief Deputy City Clerk is directed to place this Resolution and any extension or renewal for reconsideration on the City Council agenda prior to the expiration of this Resolution or any extension or renewal.

Attachment A

Page 3 of 3 ends

SECTION 4. The Chief Deputy City Clerk is hereby authorized to make minor changes herein to address clerical errors, so long as substantial conformance with the intent of this document is maintained. In doing so, the Chief Deputy City Clerk shall consult with the City Manager and City Attorney concerning any changes deemed necessary.

PASSED AND ADOPTED at a regular meeting of the City Council of the City of Santa Maria, California, held this 21st day of October 2025.

Mayor
ATTEST:

Chief Deputy City Clerk
APPROVED AS TO FORM:

By:

City Attorney
APPROVED AS TO CONTENT:

By:

Department Director
By:

City Manager

SETTLEMENT AGREEMENT AND RELEASE
This Settlement Agreement and Release (hereinafter referred to as the “Agreement”) is entered into, by, between, and among respective petitioners and/or real parties in interest, the County of Santa Barbara (“COUNTY”), the Santa Maria Public Airport District (“AIRPORT DISTRICT”), and the City of Santa Maria (“CITY”) (collectively, “LOCAL AGENCIES”) and respondent the California Regional Water Quality Control Board, Central Coast Region (“WATER BOARD”). The LOCAL AGENCIES and WATER BOARD are collectively referred to herein together as “PARTIES” and each singularly as “PARTY” based on the respective provisions herein.

RECITALS
A. WHEREAS the WATER BOARD is the lead agency with jurisdiction over the investigation and cleanup of the real property consisting of six parcels identified as Santa Barbara County Assessor Parcel Numbers 111-291-035, 111-291-036, 111-291-037, 111-291-038, 111- 291-041, and 111-291-042 (the “Site”).

B. WHEREAS, on September 26, 2023, the WATER BOARD issued Cleanup and Abatement Order No. R3-2023-0070 (“CAO”) related to the former operations of SEMCO Twist Drill and Tool Company, Inc. (“SEMCO”) at the Site. The CAO contends that SEMCO operated a precision tool manufacturing business at the Site and used cutting oil (a petroleum hydrocarbonbased lubricant) and volatile organic compounds (“VOCs”), such as trichloroethylene (“TCE”) and 1, 1,1-trichloroethane (“TCA”), as degreasers to clean tools and metal parts. The COUNTY and CITY jointly owned the Site from 1949-1964, during which time the Site was leased to SEMCO. The AIRPORT owned the Site from 1964-1968, during which time the Site was leased to SEMCO.

C. WHEREAS the CAO states that investigations have indicated that the Site is impacted with VOCs, petroleum hydrocarbons, and 1,4-dioxane in soil, soil gas, and groundwater.

D. WHEREAS the CAO identifies the LOCAL AGENCIES as dischargers responsible for the cleanup of the impacted soil, soil gas, and groundwater.

E. WHEREAS the PARTIES disagree on whether the LOCAL AGENCIES were properly named as dischargers in the CAO.

F. WHEREAS, on October 25, 2023, the AIRPORT DISTRICT filed a petition with the State Water Resources Control Board (“STATE WATER BOARD”) for review of the CAO.

After the STATE WATER BOARD dismissed the petition by operation of law, on February 22, 2024, the AIRPORT DISTRICT filed a petition for writ of mandate and complaint for injunctive relief in the Superior Court, originally filed in the County of Santa Barbara and transferred to the San Luis Obispo County Superior Court as Case No. 24CV-0379 (“Airport Petition”).

Attachment B
G. WHEREAS, on October 26, 2023, the COUNTY filed a petition with the STATE WATER BOARD for review of the CAO. After the STATE WATER BOARD dismissed the petition by operation of law, on February 22, 2024, COUNTY filed a petition for writ of mandate in the Superior Court, originally filed in the County of Santa Barbara and transferred to the San Luis Obispo County Superior Court as Case No. 24CV-0391 (“County Petition”).

H. WHEREAS, on October 24, 2023, the CITY filed a petition with the STATE WATER BOARD for review of the CAO. After the STATE WATER BOARD dismissed the petition by operation of law, on December 19, 2024, CITY filed a petition for writ of mandate in the Superior Court, originally filed in the County of Santa Barbara and transferred to the San Luis Obispo County Superior Court as Case No. 25CV-0136 (“City Petition”).

I. WHEREAS the Airport Petition, County Petition, and City Petition are referred to herein collectively as “PETITIONS.”
J. WHEREAS the WATER BOARD intends to oppose the PETITIONS.

K. WHEREAS the CAO requires those named therein, including the LOCAL AGENCIES, to meet certain investigatory and cleanup deadlines for the Site, which is enforceable by the WATER BOARD under the Water Code and other statutes.

L. WHEREAS there is a stay of enforcement of the CAO as to the COUNTY and AIRPORT DISTRICT at least through October 13, 2025.

M. WHEREAS the PARTIES desire to avoid litigation and to resolve the differences between the PARTIES.

NOW, THEREFORE, solely for the purpose of settling the claims covered by this Agreement, and to avoid further judicial proceedings and the adjudication of certain issues of law and/or fact, and for no other purpose, in consideration of the mutual promises contained herein, and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the PARTIES hereby stipulate and agree as follows.

TERMS

1. EFFECTIVE DATE. This Agreement shall become effective as of the date the last signature set forth at the end of this Agreement.

2. PARTIES AND BINDING EFFECT.

2.1. This Agreement applies only between the PARTIES, and this Agreement and each provision herein shall be binding upon and inure to the benefit of each (WATER BOARD, COUNTY, CITY, and AIRPORT DISTRICT) and all of these PARTIES and, without limitation, their respective board/council members, officials, directors, officers, principals, staff, agents, representatives, attorneys, employees, departments, divisions, successors, successors-in-interest, assigns, and all persons acting by, at the direction of or in concert with them.

Attachment B

2.2. This Agreement covers and otherwise resolves the “Covered Matters,” which means the CAO, and any and all orders, directives, requirements, civil or administrative actions, and obligations of any kind, relating to any existing or future liability or to compel the LOCAL AGENCIES to perform environmental investigation and response actions to address the Existing Contamination, releases, or threatened releases of a hazardous substance at or originating from the Site, whether that action is onsite or offsite. The “Existing Contamination” means any hazardous substances, pollutants, or contaminants that, as of the Effective Date of this Agreement, have been released, discharged, disposed of, or otherwise placed at the Site that are present or existing on or under the Site, that originate from the Site, or that have migrated or threaten to migrate from the Site, as described in the CAO. The “Covered Matters” also includes any and all costs incurred or to be incurred by the WATER BOARD relating to the Site or this Agreement.

2.3. Nothing in this Agreement shall bind, obligate, or otherwise create any rights or duties applicable to or enforceable by, or impose any limitations or conditions upon, any discharger, person or entity that has not signed the Agreement, nor shall the Agreement be construed to make such person or entity a third-party beneficiary of the Agreement.

2.4. The PARTIES shall have the express authority to enforce all provisions of this Agreement, individually or collectively.

3. COMMITMENTS OF THE PARTIES.

3.1. Settlement Work. In consideration of and in exchange for the stay of enforcement of the CAO while the following work is performed and upon completion, the full and forever release and covenant not to sue in Section 4, the LOCAL AGENCIES agree to perform the following limited scope of work as described herein (“Settlement Work”), through the LOCAL AGENCIES’ joint consultant. The time schedule to implement the following Settlement Work (“Time Schedule”) is set forth in Exhibit “A” and appended to this Agreement.

3.1.1. SOIL VAPOR EXTRACTION (SVE). The scope of work is fully described in Exhibit “B” and appended to this Agreement. The SVE shall address the shallow zone (to the low permeability layer at the bottom of the perched zone at approximately 50-foot below ground surface depth).

A. Remediation Goals. The LOCAL AGENCIES shall operate the SVE System until one of the following remediation goals is reached. The “SVE System” is described in a workplan attached hereto as Exhibit “B”. i. 1 x 10-5 risk in soil gas concentrations using 0.01 attenuation factor (cleanup to a stable concentration of 3,000 µg/m3 TCE); or Attachment B
ii. If after two (2) years 1 x 10-5 risk (3,000 µg/m3 TCE) in soil gas is not achieved, SVE operations may be discontinued once 1 x 10-4 soil gas risk (30,000 µg/m3 TCE) is achieved, provided that vapor intrusion mitigation is installed and operational if greater than 1 x 10-5 vapor intrusion risk remains (e.g., sub-slab depressurization or equivalent is implemented). After the remediation goals identified herein are obtained and the scope of work in Exhibit B is completed, the SVE System shall be owned and the responsibility of the current owner(s) of the property on which the system is located at the Site, including any operation, maintenance, repairs, or otherwise, and the WATER BOARD shall not require the LOCAL AGENCIES to take any further actions regarding the SVE System.

B. Remediation Goal Measurement. The following measurements shall be used in progress reports and to determine the achievement of one of the above remediation goals.
i. Any and all measurements of soil gas concentrations will be made using the 95 percent upper confidence level of the mean concentration as reported for vapor wells, using existing vapor probes SV8, SV11, SV12, SV15, SV16, and SV17 and five (5) SVE wells that will be installed for SVE remediation, identified in the workplan attached hereto as Exhibit B.
ii. Any and all measurements of soil gas concentrations will be made after SVE system shutdown and a suitable “rebound” period, as defined in the workplan in Exhibit “B,” to allow for equilibration and measurement of representative and stable soil gas concentrations.

C. Startup and Reporting. The LOCAL AGENCIES shall install and startup the SVE System as soon as possible, but within the time set in the Time Schedule set forth in Exhibit A, which is intended to allow for design, permitting, and public participation. Following installation and start-up of the SVE System, and for as long as the system is operating, the LOCAL AGENCIES shall submit semi-annual progress reports, which shall include, at least (a) summary of SVE System operations and maintenance, and (b) general evaluation of the SVE System’s performance with respect to the remedial goals identified herein. The progress reports shall be submitted to the WATER BOARD and uploaded to GeoTracker (in accordance with California Code of Regulations, Title 23, Division 3, Chapter 30 and Title 27, Division 3, Subdivision 1, and Title 27, Division 3, Subdivision 2). The WATER BOARD may provide comments or recommendations but shall not Attachment B
require any further action or make further directives to the LOCAL AGENCIES.

D. Cooperation and Changes in Conditions. The PARTIES have negotiated the scope of work to be a complete expression of the LOCAL AGENCIES’ obligations but acknowledge that there may be site conditions that could affect the ability of the LOCAL AGENCIES to perform the work.

Accordingly, the PARTIES also agree:
i. Public Participation. The PARTIES shall coordinate a public notice and public comment period of the interim remedial action consistent with the requirements of Health & Safety Code section 78930, to be published by the WATER BOARD.
ii. Groundwater Recharge. Should groundwater recharge make SVE infeasible in the perched zone at approximately 50-foot below ground surface depth, the LOCAL AGENCIES shall implement dual phase extraction to enable SVE to continue.
iii. SVE System Interruptions. Should operation of the SVE System be interrupted for more than 30 consecutive days or for more than 60 days in any 12-month period, not including the time that the SVE System is shut down for the suitable “rebound” period, then the two (2)-year operating period shall be extended by the same number of days of the interruption within that 12-month period.

3.1.2. DEEP GROUNDWATER ZONE ASSESSMENT AND MONITORING. The scope of work is fully described in Exhibit “C” and appended to this Agreement.

A. Vertical Profiling of City Supply Well 2AS. The LOCAL AGENCIES shall conduct a vertical profiling of Well 2AS to identify TCE, 1,4-Dioxane, and TPHg/TPHd across the well’s screen interval.

B. Deep Groundwater Monitoring Well Installation. The LOCAL AGENCIES shall install two (2) deep groundwater monitoring wells near the Site to investigate the offsite impacts, if any, for migration of contaminants that originated from the Site.
i. Ownership. The CITY shall own and maintain these two deep groundwater monitoring wells until completion of the Settlement Work described in this section (3.1.2.) is completed.

Attachment B
ii. Location of Wells. The PARTIES acknowledge that the two off-site deep groundwater monitoring wells will be placed on public property. The location or ownership of the wells is not intended to be an admission or construe separate liability of the LOCAL AGENCIES relating to ownership or operations of the real property upon which the wells are located for contamination originating from the Site.
iii. Status of Wells after Completion of Work. Once the Settlement Work described in this section (3.1.2.) is completed, the CITY may quit-claim or otherwise transfer ownership of the two wells to the current property owner(s) of the SEMCO Site or take other steps to transfer ownership of the wells to other parties named in the CAO (other than the LOCAL AGENCIES), who shall own and be
responsible for properly maintaining the wells. The COUNTY shall approve the form of any quitclaim or other ownership transfer conveyance for any well located on COUNTY property.

The CITY shall make a good faith attempt to transfer ownership of the wells to each of the parties named in the CAO. Should the transfer of ownership of the wells be accepted or rejected by one or more parties named in the CAO, the CITY and/or COUNTY shall notify the WATER BOARD.

If after the COUNTY and/or CITY provide notice to the WATER BOARD, and transfer of the wells have not been accepted by any other party named in the CAO (other than the LOCAL AGENCIES) within 365 days after the notice to the WATER BOARD, then the CITY may freely abandon, transfer, cap or otherwise cease utilization of each well in any manner in which it sees fit. This period shall be tolled during any period in which the WATER BOARD has an administrative or judicial enforcement action pending to enforce the terms of the CAO or other orders concerning the contamination related to the Site issued by the WATER BOARD against parties other than the LOCAL AGENCIES.

C. Groundwater Monitoring.
i. Semi-Annual Deep Groundwater Well Sampling Events. The LOCAL AGENCIES shall conduct eight (8) groundwater
monitoring events over a four (4)-year period, on a semi-annual basis, to sample and gauge the depths to water each of the following wells: the two (2) groundwater monitoring wells that are to be Attachment B
installed by the LOCAL AGENCIES and groundwater monitoring well DW-1 located at the Mafi Trench facility (collectively, “Sampling Wells”).
ii. CITY Well 2AS Sampling Events. The LOCAL AGENCIES shall conduct two (2) groundwater monitoring events over four (4)-years (once every other year during the semi-annual sampling events) of CITY Well 2AS.
iii. Shallow Well Sampling Event. The LOCAL AGENCIES shall conduct one (1) groundwater monitoring event of all available onsite shallow perched groundwater monitoring wells prior to the SVE System startup.
iv. Sampling Methods. Sampling analytes shall include USEPA Method 8260B/C for VOCs and TPHg/TPHd by USEPA Method
8015M. In two (2) of the groundwater monitoring events, the timing of which is set forth in Exhibit A, a general minerals sampling analysis shall also be performed.
v. Reporting. The LOCAL AGENCIES shall submit semi-annual groundwater monitoring reports to the WATER BOARD within thirty (30) days following each of the monitoring events and shall upload the groundwater data and reports to GeoTracker. The WATER BOARD may provide comments or recommendations but shall not require any further action or make further directives to the LOCAL AGENCIES.

3.1.3. TECHNICAL EVALUATIONS. The LOCAL AGENCIES shall submit to the WATER BOARD, and shall upload a copy to GeoTracker, the following technical evaluations by the deadlines set forth in the Time Schedule in Exhibit A. The LOCAL AGENCIES shall not be required to implement any work, repairs, or take any other action with respect to the groundwater treatment system or in response to the evaluation.

A. Existing Groundwater Treatment System Evaluation. A technical evaluation of the existing groundwater treatment system at the Site shall include at least details on what parts would need to be installed and other repairs that would need to be completed to make the system operable for groundwater pump and treatment of contaminated groundwater in the future.

Attachment B
B. Future Hydraulic Containment Evaluation. If after the second sampling event of the CITY Well 2AS, the detections are above 12 micrograms per liter, a technical evaluation of the use of Well 2AS for future hydraulic containment, including at least details on what work would need to be completed to have the well serve as a hydraulic containment well to prevent migration of contaminated groundwater beyond the Site boundaries in the future.

3.2. CEQA. Settlement Work being conducted pursuant to this Agreement shall be deemed as exempt from CEQA as it is being conducted in lieu of the Order, which and, as such, is exempt from the provisions of the Public Resource Code section 21000, et seq. in accordance with California Code of Regulations, title 14, section 15307 and 15308. The WATER BOARD, as the lead agency within the meaning of CEQA, shall submit a Notice of Exemption to the State Clearinghouse and to the Clerk of the County of Santa Barbara within five business days after this Agreement is fully executed, and to take all other steps necessary to comply with the requirements for exemption from CEQA.

3.3. Due Care. The LOCAL AGENCIES, and their contractors, shall exercise due care at the Site with respect to the Existing Contamination, and shall comply with all applicable local, State, and federal laws and regulations.

3.4. Modification of Time Schedule. The deadlines set forth in the Time Schedule herein may be extended by modification of Exhibit A by the WATER BOARD and LOCAL AGENCIES, and any of them. In accordance with section 10 of this Agreement, the LOCAL AGENCIES must submit written notification to the WATER BOARD of any and all requests to extend a deadline in Exhibit A at least 60 days prior to the applicable deadline or shall state why 60 days-notice is not feasible, state the need for additional time, and propose modification(s) to Exhibit A. The WATER BOARD shall not unreasonably withhold consent to a modification of the deadline(s) in Exhibit A.

3.5. Cooperation. Should there be any changes in conditions not otherwise contemplated herein that affect the ability of the LOCAL AGENCIES’ performance of the Settlement Work, the Parties shall meet and confer subject to the dispute resolution procedures in this Agreement to address issues should they arise.

3.6. Stay of CAO Enforcement. Upon this Agreement taking effect and so long as the LOCAL AGENIES are in compliance with this Agreement, the WATER BOARD will stay enforcement of the CAO against the LOCAL AGENCIES, only, and shall not impose fines, penalties, require, direct, or order the LOCAL AGENCIES to take any other actions with respect to the Covered Matters while the Settlement Work and conditions of this Agreement are completed.

Attachment B

3.7. Dismissal of Petition and Tolling.

3.7.1. Good Faith Settlement Determination. Within thirty (30) days of this Agreement taking effect, the LOCAL AGENCIES may file a motion for good faith settlement determination in their respective Petitions. A copy of any and all orders from the court making a good faith settlement determination shall be provided to the WATER BOARD to be placed in the WATER BOARD’s public files, including on GeoTracker for the Site.

3.7.2. Dismissal without prejudice. Within ten (10) court days of a decision by the Court on the motion for good faith settlement, or if no motion is filed then within fortyfive (45) days following the effective date of this Agreement, the LOCAL AGENCIES, respectively, shall file a request for dismissal without prejudice of the PETITIONS and with the court retaining jurisdiction. As stated elsewhere in this Agreement, the Court shall retain jurisdiction to enforce the settlement pursuant to California Code of Civil Procedure section 664.6.

3.7.3. Tolling of PETITION Claims. The PARTIES agree that the running of any and all applicable statutes of limitations, and any other statute, law, rule or principle of equity of similar effect, and any other time-related defenses or limitations on actions, including, but not limited to, the time limitations for filing any and all pleadings, petitions, commencing litigation, bringing suit, or instituting proceedings (collectively, “Time Defenses”), with respect to any and all rights, claims, and causes of action that have accrued or may accrue that could or might be asserted by any PARTY that are based on, arise out of, or in any way relate to the facts and circumstances associated with the PETITIONS, including mandamus relief, shall be tolled and suspended during the Tolling Period.

3.7.3.1. The “Tolling Period” shall be in place until there is a “No Further Action” letter and notice of completion of the Settlement Work. The Tolling Period may be extended by mutual written agreement of the PARTIES. The PARTIES shall not withhold consent to an extension of the Tolling Period so long as the LOCAL AGENCIES are performing the Settlement Work.

3.7.3.2. The PARTIES agree that the time included in the Tolling Period shall be excluded from computing, and determining the applicability or validity of, any Time Defenses for any and all Claims.

3.7.3.3. The PARTIES agree that no litigation or other legal proceedings will be instituted between them with regard to the matters in the PETITIONS until expiration of the Tolling Period. This provision does not apply to, nor do the PARTIES intend to toll any claims for Attachment B
breach of this Settlement Agreement, which may be brought at any time consistent with the Dispute provisions herein.

3.7.3.4. The PARTIES may terminate this provision only upon the filing of a breach of the Settlement Agreement claim, and thereupon, the Tolling Period shall terminate ninety (90) days following receipt of the notice of the filing of the breach of contract claim, at which time all claims must be preserved through the initiation of litigation.

LOCAL AGENCIES may initiate litigation, suit or proceeding at any time during the ninety-day period.

3.7.3.5. The PARTIES agree that each shall not plead, assert, or otherwise raise any Time Defenses, to the extent such is tolled by this Agreement, as a bar to other limitations on any Claims and provided as long as such Time Defenses were not already barred as of the Effective Date of this Tolling Agreement.

3.7.3.6. This provision constitutes a valid and effective written agreement to toll pursuant to California Code of Civil Procedure section 360.5.

3.7.3.7. This “Tolling of PETITION Claims” section of the Agreement may be used by any Party in a court of law as an absolute bar to the assertion of any position contrary to the terms of this provision.

3.7.3.8. Upon issuance of a notice of completion of the Settlement Work and No Further Action Letter, the PETITION Claims shall be
extinguished as a matter of law on the date of the No Further Action Letter.

3.8. Notice of Progress and Completion of Settlement Work. The LOCAL AGENCIES shall provide notices of progress and completion of the respective scopes of the Settlement Work, which may be in the form of the reports as required above. Within thirty (30) days of a notice of completion of any portion of the Settlement Work as well as a notice of final completion, the WATER BOARD shall provide a notice of determination of completion, confirming that the Settlement Work has been fully performed. Upon the LOCAL AGENCIES’ notice of final completion of all scopes of the Settlement Work, the WATER BOARD shall provide concurrence on the completion and a “No Further Action” determination. If the WATER BOARD determines that any such Settlement Work has not been completed in accordance with this Agreement, the WATER BOARD shall notify the LOCAL AGENCIES in writing and provide a detailed list of the deficiencies. The LOCAL AGENCIES may either correct the stated deficiencies, or if disputed, the PARTIES shall follow the dispute procedure set forth in this Agreement.

Attachment B

4. WATER BOARD’S RELEASE AND COVENANTS NOT TO SUE.

4.1. In consideration for the LOCAL AGENCIES’ promise and performance described herein, and effective upon complete performance of the Settlement Work described in Section 3 of this Agreement, the WATER BOARD does hereby:

4.1.1. Remove the LOCAL AGENCIES, and each of them, from the CAO for the Site, and upon removal, promises not to take any further or future action or enforcement as to the LOCAL AGENCIES only, relating to the Covered Matters, whether such actions are onsite or offsite.

4.1.2. Release and forever discharge the LOCAL AGENCIES, together and separately, and each of them, from all known and unknown civil and administrative actions, orders, directives, complaints, claims, charges, liabilities, obligations, promises, agreements, controversies, damages, actions, causes of action, suits, rights, demands, costs, losses, debts, penalties, fines, oversight costs, fees, and expenses (including attorneys’ fees and costs actually incurred), of any nature whatsoever, whether at law or in equity, or known or unknown, which the WATER BOARD has, or may have had, against the LOCAL AGENCIES, whether or not apparent or yet to be discovered, or which may hereafter develop, for any acts or omissions related to or arising from the Covered Matters. This release expressly covers, but is not limited to, any and all direct or indirect claims and administrative and regulatory authority that could be exercised pursuant to the California Water Code (including but not limited to sections 13000, et seq), California Health & Safety Code (including but not limited to Division 45, Part 2, sections 78000, et seq), Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), 42 U.S.C. § 9601, et seq, and Resource Conservation and Recovery Act (RCRA), 40 CFR § 239, et seq. This Agreement resolves any and all claims for relief relating to or arising from the Covered Matters that has or could have been alleged by the WATER BOARD against the LOCAL AGENCIES, and each of them, no matter how characterized, including, without limitation, compensatory damages, damages for breach of contract, penalties, bad faith damages, reliance damages, liquidated damages, damages for humiliation and embarrassment, punitive damages, costs, and attorneys’ fees.

4.2. The covenants and promises made herein shall not be contingent on the outcome, data, results, and/or detections of any contaminant or constituent. This means that even if there are actionable detections of contamination, including but not limited to any immediate, imminent and/or substantial impact or endangerment, that this Agreement shall remain operative and enforceable. As stated elsewhere in this Agreement, this Agreement does not inure to third parties and thus, the WATER BOARD shall retain all powers to enforce the CAO and any other obligations as to any other named “discharger” except the LOCAL AGENCIES.

Attachment B

5. CITY’S RESPONSIBILITY FOR ITS WATER SUPPLY WELLS. If hazardous substances originating from the Site impact any of the CITY’s drinking water supply wells, then the CITY shall be responsible for addressing and treating any hazardous substance pollution within its drinking water supply wells (e.g., through wellhead treatment, or otherwise, at the discretion of the CITY). The CITY shall not request assistance from the WATER BOARD for replacement water pursuant to Water Code section 13304 for impacts related to this Site. Nothing in this provision is intended to be an admission or construe separate liability of the CITY relating to ownership or operations of its drinking water supply wells for contamination originating from the Site.

6. JUSTIFIABLE RELIANCE. The PARTIES acknowledge and agree that the PARTIES, and each of them, are justifiably and reasonably relying upon the terms and conditions set forth in this Agreement, and that this Agreement is enforceable in accordance with its terms.

7. COOPERATION.

7.1. The LOCAL AGENCIES have executed a separate, related agreement for the cooperation, coordination, and assistance of each other in implementing the terms of this Agreement, including, but not limited to, providing technical, monetary, and/or administrative support to implement the terms of this Agreement (the “Common Interest Agreement”). As memorialized in the Common Interest Agreement and any amendment thereto, the COUNTY and CITY shall be responsible for ensuring and facilitating the LOCAL AGENCIES’ obligations relating to the Settlement Work set forth in this Agreement, including but not limited to communications, coordination, and cooperation with the WATER BOARD. The AIRPORT DISTRICT shall not be responsible for, nor actively participate, in facilitating the performance and completion of the Settlement Work.

7.2. The LOCAL AGENCIES may implement their obligations under the terms of this Agreement in conjunction with, or through, an agent(s) or independent contractor(s) selected by the LOCAL AGENCIES. The LOCAL AGENCIES shall retain sole discretion to hire and fire any such agent or independent contractor.

7.3. The WATER BOARD shall cooperate and assist the LOCAL AGENCIES with sufficient access to the Site and Mafi Trench site. Should it be necessary, the WATER BOARD agrees that it will use all authority provided to it by law (including but not necessarily limited to, Water Code § 13304) to obtain sufficient access to the Site for the LOCAL AGENCIES to perform their obligations under this Agreement. The PARTIES acknowledge and agree that the LOCAL AGENCIES, or any of them, shall not be deemed to be in breach of this Agreement if the Settlement Work cannot be completed due to an inability of the PARTIES to access the Site.

Attachment B

7.4. At least five (5) days prior to commencement of any portion of the physical Settlement Work that will take place on the Site, the LOCAL AGENCIES, which may be done through their consultant, shall give notice to the WATER BOARD. Upon reasonable notice thereafter, the WATER BOARD shall be authorized to access any portion of the Site that may be subject to the Settlement Work and over which the LOCAL AGENCIES, or any of them, have the authority to grant such access. The WATER BOARD shall have the right to photograph, sample, and monitor the Site for the purposes of ensuring compliance with this Agreement. The LOCAL AGENCIES shall have the right to obtain copies of all photographs, sampling data reports/analyses, and notes taken by the WATER BOARD during such Site inspection.

8. CONTRIBUTION PROTECTION.

8.1. With regard to claims for contribution against the LOCAL AGENCIES, the PARTIES agree that this Agreement is an administrative settlement for purposes of Section 113(f)(2) of CERCLA, 42 U.S.C. § 9613(f)(2) and the Hazardous Substance Account Act (HSAA), California Health and Safety Code § 79920(b), and that the LOCAL AGENCIES are entitled to protection from contribution actions or claims under CERCLA, HSAA, or as may be otherwise provided by law, for the Covered Mattersin this Agreement to the fullest extent permitted by law.

8.2. The LOCAL AGENCIES may file a motion for good faith settlement determination of their respective PETITIONS. The WATER BOARD shall not oppose the motion. The PARTIES acknowledge and agree that this motion is made as an additional protection of the LOCAL AGENCIES against third party claims. However, this Agreement is not contingent on the Court’s determination of a good faith settlement and shall still be effective without such finding.

8.3. Nothing in this Agreement, precludes or limits any of the PARTIES from seeking cost recovery or other claims brought against third parties (i.e., parties other than the PARTIES covered in this Agreement), including but not limited to, cost recovery or contribution under 42 U.S.C. §§ 9607, 9613.

9. NO ADMISSION OF LIABILITY.

9.1. Nothing in this Agreement is intended, shall constitute, or be construed as an admission or concession of guilt, fault, or liability on the part of any of the PARTIES, nor shall it be construed as an admission of the existence or non-existence of any fact. Neither this Agreement, nor any part of the negotiations had in connection herewith shall constitute evidence, a waiver of any right or defense, an estoppel, or an admission of any matter of law or fact either as among the PARTIES or with respect to any person or entity not a party to this Agreement.

Attachment B

9.2. This Agreement will not be admissible for any purpose other than (1) to support the LOCAL AGENCIES’ motion for good faith settlement determination; (2) pursuant to California Evidence Code section 1123, and without objection, for the sole purpose of interpreting and enforcing the Agreement, if needed; (3) to rebut a defense or to defend against any claim, action, or other proceeding that may be brought, instituted or taken by one of the PARTIES against the other in breach of this Agreement; and (4) to establish, rebut, defend any third party claim for contribution and/or to invoke the contribution protections contained in this Agreement.

9.3. The PARTIES acknowledge and agree that the fact that the LOCAL AGENCIES are agreeing to perform this scope of work, and any evidence of the work (including but not limited to work plans, data, reports, records, lab reports, field notes, logs, figures, maps, analysis, conclusions or any other indicia or record) do not constitute an admission or waiver by the LOCAL AGENCIES of any rights or legal theories that could have been raised in the PETITIONS. The PARTIES understand and expressly acknowledge that this shall not be used to argue that the LOCAL AGENCIES were, at any time, properly named in the CAO.

10. NOTICES. Any notice, request, demand, consent, approval or other communication required or permitted hereunder or by law shall be deemed given or made only if in writing by mail and email addressed as follows, or to such other address as may, from time to time, be designated by written notice to the other PARTIES, as follows. Any PARTY may designate, but notice to all of the other PARTIES, substitute addresses or addressees for notices, which shall not be subject to the modification provision of this Agreement, and thereafter, notices are to be directed to those substitute addresses or addressees. At the time of this Agreement, notice are as follows:

WATER BOARD:

Attn: Ryan Lodge, Executive Officer
895 Aerovista Place, Suite 101
San Luis Obispo, CA 93401
Email: [email protected]
Sophie N. Froelich
Office of Chief Counsel, State Water Resources Control Board 1001 I Street, 22nd Floor
Sacramento, CA 95814
Email: [email protected]
Dylan C. Redor
Office of the Attorney General of California
300 S. Spring St.

Los Angeles, CA 90013
Email: [email protected]
Attachment B
COUNTY:

Ted Teyber
County of Santa Barbara – General Services
Santa Barbara, CA 93101
Email: [email protected]
Christine M. Monroe
County Counsel’s Office, County of Santa Barbara
105 E. Anapamu Street, Suite 201
Santa Barbara, CA 93101
Email: [email protected]
CITY:

City of Santa Maria
Attention: City Manager
110 E. Cook Street
Santa Maria, California 93454
Office of City Attorney
Attention: Thomas Watson
204 E. Cook Street
Santa Maria, California 93454
Email: [email protected]
AIRPORT DISTRICT:

Martin Pehl, General Manager
3217 Terminal Drive
Santa Maria, CA 93455
Email: [email protected]
Josh George
Adamski Moroski Madden Cumberland & Green LLP
P.O. Box 3835
San Luis Obispo, CA 93403-3835
Email: [email protected]

11. AUTHORITY AND VOLUNTARY EXECUTION. Each of the individuals signing this Agreement represents and warrants their full power and authority to bind the party on whose behalf they sign, and that this Agreement as so executed will be binding upon each of the PARTIES. The PARTIES represent that they have carefully read this Agreement, know its contents, and freely and voluntarily signed it.

Attachment B

12. JOINT PREPARATION. Each of the PARTIES hereto has cooperated in the drafting and preparation of this Agreement through their respective counsel, and said counsel has carefully reviewed and examined this Agreement for execution by said PARTIES, or any of them.

Therefore, the Agreement shall be construed as if all the PARTIES jointly prepared it, and any uncertainty or ambiguity in the Agreement shall not be interpreted against any one Party.

13. ENTIRE FINAL AGREEMENT. The PARTIES acknowledge that this Agreement and its reduction to final form is the result of extensive good faith negotiations between the PARTIES through their respective counsel. This Agreement contains all of the terms and conditions agreed upon by the PARTIES relating to the Covered Matters by this Agreement, and supersedes any and all prior and contemporaneous agreements, negotiations, correspondence, understandings, and communications of the PARTIES, whether oral or written, respecting the Covered Matters by this Agreement.

14. COUNTERPARTS AND SIGNATURES. This Agreement may be executed in any number of counterparts, and each of such counterparts shall for all purposes be deemed to be an original, and all such counterparts shall together constitute one and the same instrument. The PARTIES agree that facsimile and electronic signatures will be treated in all respects as having the same effect as an original signature. The PARTIES agree that this Agreement will be considered signed when the signature of a Party is delivered by hand, by mail, by facsimile, or by e-mail transmission.

15. SURVIVAL. That the representations set forth in this Agreement shall endure forever and shall survive the execution of this Agreement and the settlement and dismissals of the PETITIONS.

16. SEVERABILITY. If any provision of this Agreement is determined to be unenforceable for any reason, it shall be adjusted rather than voided, if possible, in order to achieve the intent of the Parties. In any event, the remaining provisions shall be deemed valid and enforceable to the maximum extent possible.

17. GOVERNING LAW. This Agreement shall be interpreted, construed, governed and enforced under and pursuant to the laws of the State of California. Any litigation regarding this Agreement or its contents shall be filed in the County of San Luis Obispo.

18. MODIFICATIONS. This Agreement may not be amended or modified, except by a written instrument signed by all of the PARTIES.

19. DISPUTES, ENFORCEMENT, AND REMEDIES. If any dispute arises between or among the PARTIES regarding this Agreement or any of the obligations herein, the PARTIES shall resolve any such dispute using the following dispute resolution procedures:

Attachment B

19.1. The PARTIES shall attempt to resolve any disagreements concerning this Agreement expeditiously and informally. To ensure that the meet and confer process is as productive as possible, the aggrieved PARTY shall first notify the other PARTIES in writing, setting forth the basis for its position and to set a meeting. The other PARTIES shall provide a written response, if any, within ten (10) days.

Thereafter, the PARTIES shall meet and confer in person or via videoconference to attempt to resolve the matter without, and prior to seeking judicial intervention.

19.2. Any agreement reached by the PARTIES pursuant to this Section shall be in writing and shall, upon signature by each of the PARTIES, be incorporated into and become an enforceable part of this Agreement.

19.3. If after sixty (60) days of initiating the meet and confer process the PARTIES are unable to resolve their dispute, any PARTY may seek judicial intervention and determination by a court of competent jurisdiction. Nothing in this provision requires that any PARTY seek judicial intervention within a certain time period, and the PARTIES may continue to attempt to resolve the matter without judicial intervention.

19.4. Pursuant to California Code of Civil Procedure section 664.6, the Court shall retain jurisdiction over the PARTIES to interpret and enforce the settlement and/or this AGREEMENT.

20. NO ATTORNEY FEES AND COSTS. The PARTIES agree that each will be responsible for itsown expenses, including attorney’s fees and costs, in connection with the enforcement of this Agreement.

21. EXHIBITS.

A. Settlement Work Time Schedule
B. Workplan for Onsite Soil Vapor Extraction
C. Offsite and Onsite Groundwater Characterization Work Plan IN WITNESS WHEREOF, the PARTIES have entered into this Agreement as of the Effective Date set forth above.

CALIFORNIA REGIONALWATER QUALITY

CONTROL BOARD, CENTRAL COAST REGION
By: _______________________________
Title: ______________________________
Date: ______________________________
Attachment B

CITY OF SANTA MARIA
By: _______________________________
Title: ______________________________
Date: ______________________________

SANTA MARIA PUBLIC AIRPORT DISTRICT
By: _______________________________
Title: ______________________________
Date: ______________________________

COUNTY OF SANTA BARBARA
By: _______________________________
Title: ______________________________
Date: ______________________________
Attachment B

EXHIBIT A

SETTLEMENT WORK TIME SCHEDULE
Soil Vapor Extraction
Scope of Settlement Work Deadline
Start-up
- Design
- Public Participation
- Permitting
- Completion Reports
Within 400 days of the effective date of the
Agreement, subject to extension if air permit
not issued within 180 days of application
submittal.

Semi-Annual Progress Reports Due semi-annually, for as long as the system is in operation, on or by:
• April 30 – first semi-annual report for
October to March;
• October 31 – second semi-annual
report for April to September.

Groundwater Monitoring
Scope of Settlement Work Deadline
Well Installation
- Design
- Permitting
- Completion Reports
Within 150 days of the effective date of the
Agreement, subject to extension if off-site
permitting requires more than 60 days.

Semi Annual Sampling of two new wells and
Mafi Trench well (8 events total)
Semiannually, for approximately four years
until 8 events:
• First Quarter (October to March)
• Third Quarter (April to September)
Semi-Annual Reports (8 reports total) Semiannually, for approximately four years until 8 reports are submitted, on or by:
• April 30
• October 31
Attachment B
Sampling of available shallow onsite wells (1
event total)
Within 150 days of the effective date of the
Agreement and shall be included in the first
groundwater monitoring report.

Vertical Profiling of City Well 2AS (1 event
total)
Within 150 days of the effective date of the
Agreement and shall be included in the first
groundwater monitoring report.

Sampling of City Well 2AS (2 events total) Event 1: Within 150 days of the effective date of the Agreement and included in the first
groundwater monitoring report; and
Event 2: Shall be sampled during 6th semiannual groundwater monitoring event and included in the 6th semi-annual groundwater
monitoring report.

Mineral Sampling of two new wells and Mafi
Trench well (2 events total)
Event 1: Within 150 days of the effective date
of the Agreement and included in the first
groundwater monitoring report; and
Event 2: Shall be sampled during 4th semiannual groundwater monitoring event and included in the 4th semi-annual groundwater
monitoring report.

Technical Evaluations
Scope of Settlement Work Deadline
Existing Groundwater Treatment System
Evaluation
Within 270 days of the effective date of the
Agreement.

Future Hydraulic Containment Evaluation If necessary, within 120 days following the 6th semi-annual groundwater monitoring report, in
which the sampling results of City Well 2AS
are included.

Attachment B

OFFSITE AND ONSITE GROUNDWATER

CHARACTERIZATION WORK PLAN
for
2936 Industrial Parkway
Santa Maria, California
Prepared For:

The County of Santa Barbara,
The City of Santa Maria,
& The Santa Maria Public Airport District
Prepared By:

Langan CA, Inc.
104 West Anapamu St # 204B
Santa Barbara, California 93101
Christina Rain, PE
Senior Project Manager
Dorinda Shipman, PG, CHG
Principal
19 September 2025
781016901
Attachment B
Offsite and Onsite Groundwater Characterization Work Plan 2936 Industrial Parkway
Santa Maria, California
Langan Project Number: 781016901
19 September 2025
Page i

TABLE OF CONTENTS

1.0 INTRODUCTION............................................................................................................ 1

2.0 BACKGROUND ............................................................................................................. 1

2.1 Site Location ........................................................................................................ 1

2.2 Relevant Nearby Property Information .............................................................. 2

2.3 Site History........................................................................................................... 2

2.4 Geology and Hydrogeology ................................................................................ 2

2.4.1 Geology..................................................................................................... 3

2.4.2 Hydrogeology........................................................................................... 4

2.5 Known Extent of VOCs in Deep Water-Bearing Zone ....................................... 4

3.0 PROPOSED SCOPE OF WORK ..................................................................................... 5

3.1 Mobilization ......................................................................................................... 5

3.1.1 Access, Survey, Permitting, and Health and Safety Plan ....................... 5

3.1.2 Utility Clearance....................................................................................... 6

3.2 Groundwater Well Installation, Development, and Sampling .......................... 6

3.2.1 Groundwater Well Installation ................................................................ 6

3.2.2 Groundwater Well Development ............................................................ 7

3.2.3 Well Survey............................................................................................... 8

3.2.4 Decontamination and Waste Management............................................ 8

4.0 SAMPLING AND ANALYSIS PLAN/QUALITY ASSURANCE PROJECT PLAN........... 8

4.1 Sampling and Analysis Plan................................................................................ 8

4.1.1 Depth to Groundwater Measurements ................................................. 9

4.1.2 Groundwater Sampling Methodology and Laboratory Analysis.......... 9

4.1.3 Alternative Sampling Approach: Passive Sampling .............................10

4.1.4 Vertical Profiling at Municipal Supply Well 2AS...................................11

4.2 Quality Assurance Project Plan..........................................................................11

4.2.1 Field QA/QC Procedures............................................................................11

4.2.2 Laboratory QA/QC Procedures...............................................................12

5.0 REPORTING..................................................................................................................13

6.0 IMPLEMENTATION SCHEDULE..................................................................................14

7.0 REFERENCES ...............................................................................................................15

FIGURES
TABLES

APPENDICES
781016901.02 Offsite Deep Groundwater Investigation Work Plan_2936 Industrial Parkway Attachment B
Offsite and Onsite Groundwater Characterization Work Plan 2936 Industrial Parkway
Santa Maria, California
Langan Project Number: 781016901
19 September 2025
Page ii

FIGURES
Figure 1 – Site Location Map
Figure 2 – Site Plan
Figure 3 – Site Plan with Deep Water-Bearing Zone Groundwater Exceedances Figure 4 – Proposed Offsite Deep Water-Bearing Zone Monitoring Well Locations Figure 5 – Monitoring Well Construction Diagrams
TABLES
Table 1 – Proposed Well Construction Details
Table 2 – Historical Groundwater Elevations for Deep Water-Bearing Zone Monitoring Wells Table 3 – Historical Groundwater Analytical Results for Deep Water-Bearing Zone Monitoring Wells
Table 4 – Sampling and Analysis Plan

APPENDICES
Appendix A – Table A1, Existing Well Construction Details for Deep Water-Bearing Zone and Well Completion Logs and Boring Logs for Deep Water-Bearing Zone Appendix B – Historical Geological Cross-Sections
Attachment B
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1.0 INTRODUCTION
On behalf of the County of Santa Barbara (COSB), the Santa Maria Public Airport District (SMPAD), and the City of Santa Maria (City), Langan has prepared this Offsite and Onsite Groundwater Characterization Work Plan (Work Plan) for the former SEMCO Twist Drill and Tool Company, Inc., (SEMCO) Site located at 2926, 2936, 2946, 2956, 2976, and 2986 Industrial Parkway in Santa Maria, California (the “Site”) (Figures 1 through 3). The California Regional Water Quality Control Board, Central Coast Region (“Central Coast Water Board”) has identified the Site as Case No. S28 (SLT3S2411351).

This Work Plan provides the scope of work for the installation of two offsite deep groundwater monitoring wells (Table 1 and Figures 4 and 5), as required by the Settlement Agreement, SEMCO (COSB/SMPAD/CSM v. Water Boards) (Settlement Agreement). This Work Plan also provides the Sampling and Analysis Plan/Quality Assurance Project Plan (SAP/QAPP) for baseline and semi-annual groundwater monitoring of shallow/perched zone wells and deep water-bearing zone wells, also in accordance with the Settlement Agreement.

This Work Plan is organized as follows: Section 2.0 Background; Section 3.0 Proposed Scope of Work; Section 4.0 Sampling and Analysis Plan/Quality Assurance Project Plan; Section 5.0 Reporting; Section 6.0 Implementation Schedule; and Section 7.0 References for the Work Plan.

2.0 BACKGROUND

2.1 Site Location
The Site is approximately 7.31 acres in size and is comprised of six parcels (COSB Assessor’s Parcel Numbers [APNs] 111-291-035 through 111-291-038, 111-291-041, and 111-291-042) located in Santa Maria east of the Santa Maria Public Airport (Figures 1 through 3). Santa Maria is situated in a valley north of Orcutt, California, and south of the Santa Maria River. The valley is bordered on the west by the Casmalia Hills and Pacific Ocean and to the east by the San Rafael Mountains and the Los Padres National Forest. The Site slopes gently from north to south at an approximate elevation of 240 to 236 feet above mean sea level.

The Site is bounded by Industrial Parkway and commercial/industrial businesses to the west, commercial/industrial businesses to the north and south, and the Santa Maria Valley Railroad Trail followed by the Santa Maria Country Club to the east. Parcel 111-291-037 at 2936 Industrial Parkway is located on the western side of the Site where the historical SEMCO facility is located.

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An inactive onsite City municipal water supply well (Well 2AS), which was shut down in 1985, is located near the southern Site boundary (Figures 2 and 3). Apart from an easement to Well 2AS, the COSB, SMPAD, and City do not own or control the Site.

2.2 Relevant Nearby Property Information
The surrounding area consists of a park, athletic fields, the Santa Maria Airport, and various industrial and commercial buildings. No schools, hospitals, residential areas, or other sensitive receptors are present within 1,000 feet of the Site. The nearest residential neighborhood is east of the Santa Maria Country Club over 1,000 feet from the Site. The Mafi Trench Corporation site at 3037 Industrial Parkway is the location of groundwater monitoring well MAFI-DW-1, which is approximately 410 feet southwest of the Site (Figure 4). 1 2.3 Site History
As described by the Order No. R3-2023-0070 (Order), the Site was developed in 1942, when it began operation as the Santa Maria Lompoc Army Air Base until 1946. From approximately 1949 to 2001, the Site was occupied by a tool manufacturing business producing precision drilling bits and related cutting tools operated by SEMCO. During disputed time periods, SEMCO used cutting oil (a petroleum hydrocarbon-based lubricant), trichloroethene (TCE), and 1,1,1-trichloroethane (1,1,1-TCA) onsite during its operations. VOCs were reportedly stored onsite in aboveground storage tanks (ASTs) and the cutting oil was stored in an underground sump. The U.S. Army had at least two underground storage tanks (USTs) on the property (T1242 and T1273). Based on previous sampling results available on GeoTracker indicating elevated concentrations of total petroleum hydrocarbons, TCE and 1,1,1-TCA, the Central Coast Water Board suspects SEMCO discharged waste on the property. Former municipal supply Well 2AS was reported to have a TCE concentrations of up to 59 micrograms per liter (µg/L) between 1984 and 1985, above the drinking water standard of 5 µg/L2(Cleanup and Abatement Order No. R3- 2023-0070 Former SEMCO Twist Drill and Tool Company, Inc. et al., 2023).

2.4 Geology and Hydrogeology
Geologic and hydrogeologic information for the Site is described below. Boring logs for the deep water-bearing zone and historical geological cross-sections are provided in Appendices A and B, 1 https://geotracker.waterboards.ca.gov/profile_report?global_id=SLT3S0301290 2 California State Water Resources Control Board (SWRCB) Drinking Water Maximum Contaminant Levels (MCLs) (November 2024).

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respectively.

2.4.1 Geology
The Site is located in the Santa Maria Valley in the County of Santa Barbara, California. The regional geology consists of Pliocene to recent fluvial river channel deposits, alluvium, and terrace deposits with the Orcutt and Paso Robles formations and tertiary rocks and terrestrial sand dunes at higher elevations. Various tectonic events created the California Coast Ranges and the Transverse Ranges of Southern California, which are present to the south, west and east of the Santa Maria Valley (Worts, 1951).

Subsurface lithology at the Site has been identified as the following based on past investigation activities (ACG, 2021 and boring log for 2AS in Appendix A):
• The uppermost unit (Unit 1) from the ground surface to approximately 38 to 40 feet below ground surface (bgs) consists of clayey fine- to medium-grained sand and silty fine-grained sand, to a well-sorted fine- to medium-grained sand, light brown to tan color. Minor lenses of clayey silt and silty clay up to 6 inches thick are found within this unit, particularly at approximately 15 feet bgs.
• The upper middle lithologic unit (Unit 2) has a boundary with the uppermost unit at approximately 38 feet bgs and ranges in thickness from approximately 8 to 20 feet. The lithologic composition of this unit is variable, consisting of interlayered clayey sand, sandy silt, sandy clayey silt, and silty clay. Minor amounts of clean fine- to medium-grained sand, clay, and clayey gravel exist throughout the unit.
• The lower middle lithologic unit (Unit 3) extends from approximately 57 to 125 feet bgs and consists of poor to well sorted, medium- to coarse-grained sand with minor gravelly layers. Sandy clay to clay lenses of up to 5 feet thick are present throughout the unit, but do not appear to be laterally extensive. Cobble clasts are also present throughout this unit.
• The lowermost lithologic unit (Unit 4) encountered in investigations to date dominantly consists of poorly to well-sorted sandy gravel and clayey, sandy gravel, and gravel. Gravel size ranges from pea gravel to cobbles. Lenses of brown to tan, poorly sorted, silty, fineto medium-grained sand and silty clay are present throughout the unit. The base of this unit was not penetrated, but reportedly extends to at least 248 feet bgs.

Attachment B
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2.4.2 Hydrogeology
The Site is located within the Santa Maria River Valley Groundwater Basin (CA Department of Water Resources [DWR], 2004), which generally consists of unconsolidated gravel, sand, silt, and clay in undifferentiated alluvial, river channel, and dune sand deposits. Groundwater occurs in at least two distinct saturated zones (Appendix B): a perched water-bearing zone (Unit 1, shallow water-bearing zone), with groundwater present from approximately 10 feet bgs to a clay or hardpan (aquitard, Unit 2), located at approximately 40 to 50 feet bgs and a deeper, regional water-bearing zone (deep water-bearing zone) at approximately 210 feet bgs, Unit 4.

Groundwater flow beneath the Site is inferred to be to the south in the deep zone based on reported groundwater elevations in nearby water supply wells (Figure 4). The groundwater underlying the Site has designated beneficial uses, including agricultural water supply, municipal and domestic water supply, and industrial use (CCRWQCB, SWRCB, and CalEPA, 2019).

During investigations for VOCs, petroleum hydrocarbons, and 1,4-dioxane, multiple onsite groundwater monitoring wells were installed and sampled. Between 1987 and present, first encountered groundwater in the onsite perched/shallow zone was observed between 7 and 35 feet bgs, and first encountered groundwater in the deep groundwater-bearing zone was observed between 127 and 190 feet bgs. Groundwater is encountered inconsistently in the perched/shallow zone, with several wells exhibiting dry conditions across the various monitoring events. During the most recent monitoring event in 2021 (ACG, 2021), shallow groundwater was observed at variable depths between 10 and 34 feet bgs, and the deep monitoring wells (DMW-1 to DMW-5) were dry indicating the deep-zone groundwater was below the bottom of the wells.

Depth to water measurements in 2024/2025 showed water present at approximately 185-feet in 2AS and 191-feet in MAFI-DW-1, to the south. Therefore, this Work Plan has been developed based on depth to groundwater of approximately 190 to 220 feet bgs in the areas south of the Site. Historical groundwater elevations for deep water-bearing zone monitoring wells relevant to this work plan are provided in Table 2.

2.5 Known Extent of VOCs in Deep Water-Bearing Zone
Historical groundwater analytical results for deep water-bearing zone monitoring wells are provided in Table 3. Groundwater monitoring was conducted in the four deep zone groundwater wells onsite (DMW-1 through DMW-4) in 1990, 1991, 1998 and 2003. DMW-5 was discovered in 2021 during a groundwater monitoring well investigation, but was noted as dry (ACG, 2021).

Langan does not have access to well construction information for DMW-5. TCE was detected above the California drinking water maximum contaminant level (MCL) of 5 µg/L in DMW-2 and Attachment B
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DMW-3, with a maximum detected concentration of 1,200 µg/L. 1,2-dichloroethane, cis-1,2- dichloroethene and 1,4-dioxane were also detected above MCLs or notification levels (NLs) in DMW-2 in 2003. TCE has also been present in groundwater above MCLs at former supply well 2AS, located in the southern portion, and MAFI-DW-1, located 410 feet southwest of the Site.

Water supply well 2AS was sampled for TCE in 1985, with a concentration of 59 µg/L, and was promptly removed from the local water supply network. MAFI-DW-1 was sampled in 1992, 2017 and 2019 through 2024. TCE and cis-1,2-dichloroethene concentrations exceeded their respective MCLs in all seven sampling events, with TCE detected at up to 100 µg/L. The detections of 1,4-dioxane are below the response level of 35 µg/L. 3 Langan also reviewed TCE concentration data for nearby supply wells available in the State Water Resources Control Board’s Groundwater Ambient Monitoring and Assessment Program Groundwater Information System (GAMA-GIS). As shown on Figure 4, TCE impacts appear to be localized to the Site and possibly downgradient areas, though it is not yet known whether the offsite TCE detections are attributable to the Site. Inferred upgradient, offsite municipal water supply wells 4, 8S, and 11S were non-detect for TCE in 2006, 2020, and 2024, respectively.

Inferred cross-gradient, offsite municipal supply well 6S, located west of the Site, was non-detect for TCE based on various sampling events from 1985 through 2022. Inferred downgradient, offsite municipal supply well 7S, which is 4,000 feet south of the Site, was non-detect for TCE in 2012, after having detections of TCE in the early 2000s as high as 7.4 µg/L.

3.0 PROPOSED SCOPE OF WORK
The scope outlined in this Work Plan includes installing two offsite deep groundwater monitoring wells to approximately 250 to 270 feet bgs (Figure 4).

3.1 Mobilization

3.1.1 Survey, Permitting, and Health and Safety Plan
Prior to well installation, a survey will be performed of the proposed well locations to identify and define offset(s) from nearby roadways and infrastructure. Preliminary locations are depicted on Figure 4. The locations shown are approximate and may be adjusted such that 1) utilities are properly located and avoided, (2) the installation will not require tree removal or other major park disruptions, and (3) the locations are generally accessible for installation and monitoring. 3 California Notification and Response Levels. Available online at:
https://www.waterboards.ca.gov/drinking_water/certlic/drinkingwater/14-Dioxane.html Attachment B
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Groundwater monitoring well installation permits will be obtained from the COSB Environmental Health Services (CSBEHS) prior to beginning drilling activities. DMW-6 is planned to be installed on COSB Parks Department (Parks Department) property. An encroachment permit is not anticipated to be required on Parks Department property based on discussions with Parks Department personnel. DMW-7 is planned to be installed on City property and Langan anticipates an encroachment permit will be required.

A Langan Site-specific Health and Safety Plan will be prepared to ensure safe working conditions during the field activities and will outline steps to minimize or prevent accidents and/or exposure to chemicals of concern. All onsite personnel will be required to review and adhere to the Health and Safety Plan.

3.1.2 Utility Clearance
At least two working days prior to mobilization, the proposed well locations will be clearly marked on the ground surface with water-based UV white paint and/or stakes. DigAlert will be contacted to identify and mark out underground utilities within 10 feet of the proposed locations. A private utility locating company will be contracted to scan for utilities in a 10 foot by 10 foot area around each well location. Additionally, the well locations will be cleared using soft-digging techniques to at least 5 feet bgs prior to drilling (this may require several hand-auger locations to cover

1.5 times the proposed well diameter or air-knifing).

3.2 Groundwater Well Installation, Development, and Sampling

3.2.1 Groundwater Well Installation
Two 9-inch diameter soil borings will be advanced to maximum depth of 270 feet bgs, using sonic drilling at the approximate locations shown on Figure 4. Precise well locations will be confirmed following local survey of the proposed well locations. The drilling will be performed by a California-licensed C-57 contractor and will be completed under the responsible oversight a California-licensed Professional Geologist or Engineer. Soil cores will be collected from the inner core barrel plastic sleeves that are located within the larger override casing. Soil from the soil cores will be field screened for VOCs using a photoionization detector (PID) and will be classified visually in accordance with the Unified Soil Classification System (USCS). The USCS descriptions and PID readings will be recorded on field logs for inclusion in the Offsite Deep Groundwater Investigation Report (see Section 5.0). Soil sampling is not proposed given that the proposed wells are located approximately 700 feet and 1,375 feet from the Site.

Attachment B
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A groundwater monitoring well will be installed in each boring (DMW-6 and DMW-7) with proposed depths of approximately 240 and 245 feet, respectively. The wells will be constructed with a 4-inch-diameter Schedule 80 polyvinyl chloride (PVC) casing with 0.020-inch machined slot screens from approximately 200 to 240 feet bgs and 205 to 245 feet bgs, respectively. The screens will be adjusted as necessary during well installation to position the top of screen approximately 10 feet above the estimated depth of the water table and provide a 40-foot screen length. The screen is intended to be placed fully within geologic Unit 4 (e.g., gravel). Proposed well construction details are listed in Table 1 and depicted on Figure 5.

The monitoring wells will be backfilled with #3 sand from the bottom of the borehole annular space (i.e., approximate bottom of the screened interval) to approximately 2 feet above the well screen. The filter pack will be surged, sealed, and 5 feet of hydrated bentonite will be placed above the sand in the annular space. Bentonite-cement grout will be placed in the annular space from the hydrated bentonite layer to ground surface. Both wells will be completed with flushmounted traffic-rated well boxes set in concrete. The concrete pad will be raised approximately 1 to 1.5 inches above ground surface to prevent burial and slightly sloped to prevent damage to vehicles and promote runoff. If the well is installed in a sidewalk or roadway, the wells will be constructed flush with the ground surface to minimize potential trip hazards. The well number (identification) will be etched into the concrete pad. The top of casing will be marked to indicate where depth to groundwater measurements will be measured. As-built well construction details along with boring logs will be presented in the Offsite Deep Groundwater Monitoring Well Installation Report (See Section 5.0).

3.2.2 Groundwater Well Development
The newly installed monitoring wells will be developed in accordance with procedures specified in the State of California Department of Water Resources Monitoring Well Standards (Bulletin 74- 90) (DWR, 1991). Between 2 and 7 days following well installations, a well development rig or drill rig will be used to surge the screened interval. A bailer will be used to remove solids introduced during the surging. The well will be purged using an electric submersible pump until water quality parameters (turbidity, pH, conductivity, and temperature) adequately stabilize. A value is considered to have stabilized when three consecutive readings taken at one-half well volume intervals are within 10% of each other (pH stabilization = 0.2 pH units). A minimum of one well volume will be removed during purging, or enough water to lower the water level to approximately one-half its original level, if well recharging allows. Data collected during development will be recorded on well-development logs and presented in the Offsite Deep Attachment B
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Groundwater Monitoring Well Installation Report.

3.2.3 Well Survey
The horizontal locations and vertical elevations of the newly installed groundwater monitoring wells will be surveyed by a State of California-licensed land surveyor in accordance with State Water Resources Control Board GeoTracker standards. The horizontal coordinates will be reported in latitude/longitude to seven decimal places with an accuracy of less than 0.1 meter using the 1983 North American Datum (NAD83). Relative elevations will be reported within an accuracy of 0.01 feet using 1988 North American Vertical Datum (NAVD88). The surveyor will mark the survey points of the wells on the tops of the casings and groundwater levels will be measured from these points.

3.2.4 Decontamination and Waste Management
Reusable sampling equipment will be decontaminated between sample intervals using the triplewash method. Decontamination procedures include an initial wash with tap water mixed with non-phosphate detergent, followed by a rinse with tap water, and finished by a rinse with distilled water.

Soil cuttings, decontamination water, and purge water will be stored in DOT-approved 55-gallon drums, totes, or bins pending characterization for offsite disposal. Temporary storage of the investigation-derived waste (IDW) will be coordinated with the COSB, City, and/or the Site property owners. The IDW will be managed according to state and federal regulations by a licensed waste hauler and disposed at a licensed facility.

4.0 SAMPLING AND ANALYSIS PLAN/QUALITY ASSURANCE PROJECT PLAN Baseline groundwater sampling of shallow/perched zone wells and semi-annual groundwater sampling of deep water-bearing zone wells will be performed in accordance with this Sampling and Analysis Plan/Quality Assurance Project Plan (SAP/QAPP).

4.1 Sampling and Analysis Plan
A baseline groundwater monitoring event and eight semi-annual groundwater monitoring events will be performed over a four- (4) year period commencing upon completion of offsite deep monitoring well installation outlined above. During each monitoring event, the groundwater levels will be gauged at monitored wells. The baseline monitoring event will include sampling of onsite shallow/perched wells MW-1 through MW-16, if groundwater is present, and vertical profile Attachment B
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sampling at municipal supply well 2AS. Semi-annual groundwater monitoring events will be limited to monitoring of offsite wells DMW-6, DMW-7 and MAFI-DW-1. Additionally, supply well 2AS will be included in the first semi-annual monitoring event of year three of the monitoring program.4 A sampling and analysis plan summarizing the baseline and semi-annual monitoring program is provided as Table 4.

4.1.1 Depth to Groundwater Measurements
Monitoring wells will be gauged using a water level indicator to the nearest 0.01 foot measured at the marked survey points and recorded on a field log.

4.1.2 Groundwater Sampling Methodology and Laboratory Analysis The shallow and deep monitoring wells will be purged and sampled using low-flow (minimaldrawdown) purging methods using a bladder pump or an electric submersible pump equipped with a flow-rate controller and dedicated tubing. A peristaltic pump may be used for shallow sample locations. Anticipated equipment will include a bladder pump or submersible positivedisplacement pump with adjustable discharge rate, an electronic water level indicator, and a flow cell with water quality instruments that measure temperature, electrical conductivity (EC), pH, dissolved oxygen (DO), oxidation-reduction potential (ORP), and turbidity. Groundwater will be discharged from the pump through polyethylene tubing into the flow cell to measure the groundwater quality parameters.

An electronic water level indicator will be used during sampling to measure depth to water or drawdown to inform the appropriate pumping rate. The target pumping rate will be 100 to 500 milliliters per minute; however, a sustainable low-flow pumping rate will be established such that head loss targets 0.3 feet or less of drawdown. The groundwater monitoring well will be purged until water quality parameter readings (pH, temperature and specific conductance) stabilize. Water quality parameters and volumes purged will be recorded on purge sheets every 3 to 5 minutes. If groundwater parameters haven’t stabilized after three well volumes, two additional well volumes shall be purged from the well, prior to sample collection. Monitoring well purging will be considered complete after five well volumes have been removed from the well. 4 If sampling of former municipal supply well 2AS is not possible, a suitable shallow well shall be sampled in the vicinity in consultation with Central Coast Water Board.

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Parameter Stability Criteria
Temperature +/-0.5 ºC
pH +/-0.2
Specific Conductance +/-10%
Immediately following purging, the groundwater sample will be collected and placed in the appropriate laboratory- supplied sampling containers directly from the dedicated pump tubing.

The samples will be labeled with sample-point identification, project name, and analysis requested, and then placed on ice pending delivery to a California ELAP-certified laboratory under chain-of-custody protocol.

The groundwater samples will be analyzed for VOCs by USEPA Method 8260B and TPHg/d by USEPA Method 8015-modified. Field duplicates and equipment and trip blanks will also be analyzed for VOCs using USEPA Method 8260B, as further described in Section 4.2.1.

Additionally, one groundwater sample collected as part of the baseline monitoring event will be analyzed for the constituents outlined in the City industrial wastewater discharge permit. The baseline monitoring event, the first semi-annual monitoring event of year one of the monitoring program, and the first semi-annual monitoring event of year three of the monitoring program (fifth semi-annual monitoring event) will also include 1,4-dioxane by EPA Method 8270 (all wells) and general minerals (deep wells only). General minerals will include analysis for sodium, potassium, calcium, magnesium, chloride, carbonate, bicarbonate, sulfate and nitrate under EPA Methods E300.1, SM2320B, SM4500, E200.8, SM2510B, and SM2540C.

4.1.3 Alternative Sampling Approach: Passive Sampling
Passive sampling (passive diffusion or HydraSleeve no-purge sampling) will be implemented at each deep monitoring well as an alternative to low flow sampling at the discretion of the Central Coast Water Board. A passive diffusion sampler consists of one or more semipermeable membranes former into a tubular shape, sealed at the bottom and filled with deionized water.

The sampler will be suspended in the screened interval at the desired sampling location and left in place for chemical equilibrium to occur. Due to the concentration gradient between the deionized water and the well formation groundwater, contaminants and other chemical constituents will flow into the sampler until equilibrium is reached. The time to equilibrium will depend on the manufacturer of the sampler and the recommendation for each chemical of concern, and typically is approximately 2 to 3 weeks. A HydraSleeve no-purge sampler collects a discrete water column sample into a sample sleeve. No-purge sampling will be performed in Attachment B
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accordance with the manufacturer’s standard operating procedure.5 A bottom weight is secured to the sampler to carry the sampler to the specified sampling depth.

4.1.4 Vertical Profiling at Municipal Supply Well 2AS
Vertical profiling of municipal supply well 2AS will be conducted during the baseline groundwater monitoring event. A video survey of the interior of the well will be conducted using an exploratory camera to confirm the screened interval is 182 to 238 feet bgs (as per the markup of the well construction log included in Appendix A). Three low-flow, passive diffusion or no-flow groundwater samples will then be collected at 2AS. A sample will be collected at approximately 210 to 215 feet bgs (or at first encountered groundwater along the screened interval) to match the depth of TCE detected in MAFI-DW-1 in 2023 and one sample each at the middle and bottom of the saturated screened interval at 220 to 225 feet bgs and 230 to 235 feet bgs, respectively.

Sampling multiple depths along the well screen is intended to evaluate the vertical profile of potential contamination. If the measured groundwater level is deeper than anticipated (i.e., deeper than 210 feet bgs), then only two samples may be collected.

4.2 Quality Assurance Project Plan
Quality assurance/quality control (QA/QC) procedures will be used in both sample collection and chemical analysis. The purpose of the QA/QC procedures is to ensure the reliability and validity of data generated during the monitoring events described in this work plan. QC samples will be collected during field activities, including a groundwater field duplicate, an equipment blank, and a trip blank sample.

4.2.1 Field QA/QC Procedures
Field QA/QC procedures will be performed during the investigations and will consist of the following measures:
• Chain of custody (COC) records will be used to document sample collection and will be submitted to the laboratory performing the chemical analyses. A COC record will accompany all samples submitted for chemical analyses; and • Daily information regarding sample collection will be recorded in field logs, including sample type(s), description, sample identification number(s), and sample time(s). 5 HydraSleeve Standard Operating Procedure. Available online at:
https://eonpro.com/wp-content/uploads/2023/04/HydraSleeve-SOP-2.0-2023-1.pdf Attachment B
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Field QA/QC samples will be collected and submitted for chemical analyses along with the groundwater samples, and will include the following:
• Field Duplicate Sample: One duplicate groundwater sample will be collected and analyzed per sampling day to evaluate the analytical procedures and methods employed by the laboratory. The duplicate groundwater sample will be collected concurrently with its parent groundwater sample and will be submitted for VOCs analysis. • Equipment Blank Sample: One equipment blank sample will be collected per sampling day to determine the efficacy of decontamination procedures for sampling equipment and will be collected when disposable sampling equipment is not used. The equipment blank sample will consist of deionized water poured over or pumped through the decontaminated sampling equipment, and collection of the rinsate into the appropriate sample containers. The equipment blank sample will be submitted for VOCs analysis. • Trip Blank Sample: One trip blank sample will be submitted and analyzed per sampling day. The trip blank water sample will consist of a sample of deionized water provided by the laboratory and stored with the samples collected during each day of field activities.

The purpose of the trip blank sample is to evaluate the potential for cross-contamination of aqueous samples during handling. The trip blank sample(s) will be handled in the same manner as all other samples and submitted for VOCs analysis.

4.2.2 Laboratory QA/QC Procedures
Laboratory QA/QC procedures will include the following:
• Chemical analyses will be performed within the required holding time for all samples chemically analyzed.
• A state-certified hazardous waste testing laboratory will conduct the required analysis.

The laboratory will provide the following information for each sample:
• Method blank data;
• Surrogate recovery, instrument tuning, and calibration data; and • Signed laboratory reports including the sample designation, date of sample collection, date of sample analysis, laboratory analytical method employed, sample volume, and the minimum RL.

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5.0 REPORTING
An Offsite Deep Groundwater Monitoring Well Installation Report will be prepared describing well construction and development, and deviations from this Work Plan (if any). The Well Installation Report will provide as-built well construction details, boring logs, well-development records, and copies of the DWR well completion reports.

Separate Baseline and Semi-annual Groundwater Monitoring Reports will be prepared for the baseline groundwater monitoring event and each subsequent semi-annual monitoring event. The Baseline and Semi-annual Groundwater Monitoring Reports will include the following elements for general consistency with the Order and for compliance with the Terms:

1. A table with well completion information, including top of well casing elevation, total depth, and screen interval with respect to both mean sea level and ground surface for all monitored wells.

2. Results of field and laboratory sampling in tabular form compared to drinking water MCLs. • If detections warrant, and in discussion with COSB and Central Coast Water Board, then the 5
th semi-annual groundwater monitoring report may recommend further evaluation of the use of former municipal supply well 2AS for future hydraulic containment. The evaluation would include detailed recommendations for what work would need to be completed to have the well serve as a hydraulic containment well to prevent potential migration of contaminated groundwater beyond the Site boundaries in the future.

3. Scaled maps showing the Site and the locations of monitoring wells.

4. Maps showing calculated potentiometric groundwater elevations at each monitoring well and interpreted potentiometric surfaces for each water-bearing zone, as applicable to the monitoring event.

5. Maps showing VOCs and 1,4-dioxane concentrations and an interpretation of the chemical distribution.

6. An evaluation and interpretation of available data.

7. The signature or stamp of a registered professional with applicable experience attesting, under penalty of perjury, that the report is true and accurate.

8. Sampling protocols and field sampling logs.

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9. Narrative description of sample collection protocols and summary of analytical results for any and all detected compounds; and

10. Certified laboratory analytical reports and chain of custody records for current monitoring data.

The reports will be reviewed and approved by a licensed California Professional Geologist or Engineer. Groundwater analytical data and reports will be submitted to the Central Coast Water Board via upload to GeoTracker within 45 days of receipt of the laboratory data as an EQuIS electronic data deliverable (EQEDD).

6.0 IMPLEMENTATION SCHEDULE
Following approval of this Work Plan, the implementation schedule for well installation and sampling will follow the schedule outlined below:
• Baseline monitoring event and reporting for shallow/perched zone wells and former municipal supply well 2AS: within 90- to 120-days of the fully executed Settlement Agreement.
• Deep groundwater monitoring well installation, development, survey, and reporting:
within 120 days of the fully executed Settlement Agreement. The schedule is based on necessary permits being obtained within 60 days of the fully executed Settlement Agreement. Well installation, development and survey require an estimated three weeks for field completion. Well completion reports will be submitted to DDW, the COSB, and the Central Coast Water Board 30 days following completion of well installation. • Semiannual groundwater sampling and reporting: Deep well semi-annual monitoring will be performed within October to March and April to September of each calendar year for eight total semi-annual monitoring events. Groundwater sampling is estimated to require up to three weeks, dependent upon sampling approach. Semi-annual reports will be submitted, on or by April 30 and October 31.

The listed schedule is subject to change based on timelines for this Work Plan, the Settlement Agreement, and permits required for well installation.

Attachment B
Offsite and Onsite Groundwater Characterization Work Plan 2936 Industrial Parkway
Santa Maria, California
Langan Project Number: 781016901
19 September 2025

Page 15 ends

7.0 REFERENCES
Analytical Consulting Group, Inc. (ACG). 2021. Monitoring Well Investigation Report. Former Semco Twist Drill & Tool Company. 2936 Industrial Parkway. Santa Maria, California. Site I.D. No.

SLT3S2411351 (October 20, 2015, California Water Code [Water Code] section 13267 Investigative Order [2015 Order]). July 16.

ACG. 2021. Site Assessment Workplan. Monitoring Well Evaluation. Soil Vapor Sampling. Indoor Air Sampling. Former Semco Twist Drill & Tool Company. 2936 Industrial Parkway. Santa Maria, California. Site I.D. No. SLT3S2411351 (October 20, 2015, California Water Code [Water Code] section 13267 Investigative Order [2015 Order]). February 12.

California Department of Water Resources (DWR). 1991. Monitoring Well Standards Bulletin 74-90. June 1991.

Central Coast Regional Water Quality Control Board (CCRWQCB). 2015. Letter entitled “Site Cleanup Program: SEMCO Twist Drill and Tool Company, Inc., 2936 Industrial Parkway, Santa Maria, Santa Barbara County (GeoTracker Global ID# SLT3S2411351) – Requirement for Site Investigation.” October 20.

CCRWQCB. 2023. Cleanup and Abatement Order No. R3-2023-0070. Former Semco Twist Drill and Tool Company, Inc. ET AL. Industrial Parkway, Santa Maria Santa Barbara County.

September 25.

CCRWQCB, State Water Resources Control Board (SWRCB), and California Environmental Protection Agency (CalEPA), 2019. Water Quality Control Plan for the Central Coastal Basin. June.

DWR. 2004. California Department of Water Resources Santa Maria River Valley Groundwater Basin. California’s Groundwater Bulletin No. 118. Last updated February 27, 2004.

Eon Products, Inc. Standard Operating Procedures for Groundwater Sampling Using Passive Diffusion Samplers.

Everest Services, Inc. (Everest), 2004. 2003 Third Quarter Report for Groundwater Monitoring Activities at 2936 Industrial Parkway APNs 111-291-027 & 028. Santa Maria, California. Santa Barbara County, California. February 24.

Haro Environmental, 2024. Offsite Deep Groundwater Monitoring Investigation Work Plan, 2936 Industrial Parkway, Santa Maria, California 93455. Prepared for Rhine, L.P. March 25.

Padre Associates, Inc., 2024. Report of Findings, Annual 2024 Groundwater Monitoring Event, 3037 Industrial Parkway, Santa Maria, Santa Barbara County, California (Global ID No.

SLT3S0301290). December.

Tetra Tech, 1999. Technical Report on Groundwater Monitoring, SEMCO Twist Drill & Tool Company, 2936 Industrial Parkway, Santa Maria, California. March 22.

Attachment B
Offsite and Onsite Groundwater Characterization Work Plan 2936 Industrial Parkway
Santa Maria, California
Langan Project Number: 781016901
19 September 2025

Page 16 ends

Worts, G.F. 1951. Geology and Ground-Water Resources of the Santa Maria Valley Area, California. Geologic Survey Water-Supply Paper 1000. 1951. Available online:
https://pubs.usgs.gov/wsp/1000/report.pdf
Attachment B
TABLES
Attachment B
Table 1
Proposed Well Construction Details
SEMCO, Santa Maria, California
Langan Project: 781016901
September 2025
Well
Screen
(Top)
Well Screen
(Bottom)
(elev in ft amsl) (ft bgs) (in) (in)
DMW-6 252 240 4 193 198 0.020 200 240
DMW-7 253 245 4 198 203 0.020 205 245
Notes:
amsl - above mean sea level
bgs - below ground surface
elev - elevation
ft - feet
in - inches
Screen
Slot Size
Top of
Bentonite
Seal Depth
Estimated Surface
Well ID Grade
Anticipated Screened
Interval
Casing
Diameter
Total
Depth of
Well
Top of
Sand Pack
Depth
(ft bgs) (ft bgs)

Page 1 of 1 ends

Attachment B
Table 2
Historical Groundwater Elevations for Deep Water-Bearing Zone Monitoring Wells SEMCO, Santa Maria, California
Langan Project: 781016901
September 2025
Well Casing Elevation
(feet amsl)
Well depth (feet
bwc) Date measured
Depth to Water (feet
bwc)1
Groundwater Elevation
(feet amsl)
Mar-91 186.64 51.10
Aug-94 191.89 45.85
Jun-95 183.55 54.19
Jun-96 175.10 62.64
Jan-97 166.55 71.19
Jun-97 166.55 71.19
Dec-97 158.84 78.90
Jul-98 141.96 95.78
Nov-98 142.06 95.68
Dec-98 141.30 96.44
Jul-99 132.99 104.75
Jan-00 126.81 110.93
Jul-00 127.44 110.30
Dec-00 126.98 110.76
Jun-21 Abandoned
Mar-91 185.62 50.81
Dec-98 139.91 96.52
Sep-03 139.22 99.48
Jun-21 Dry
Mar-91 185.20 50.99
Aug-94 191.33 44.86
Jun-95 183.10 53.09
Mar-91 185.20 50.99
Jun-96 174.72 61.47
Jan-97 166.20 69.99
Jun-97 166.27 69.92
Dec-97 158.57 77.62
Jul-98 146.75 89.44
Nov-98 141.85 94.34
Dec-98 139.67 96.52
Jul-99 131.31 104.88
Jan-00 125.20 110.99
Jul-00 125.82 110.37
Dec-00 125.38 110.81
Sep-03 139.00 99.43
Jun-21 Unable to locate
Mar-91 187.12 51.09
Dec-98 141.48 96.73
Sep-03 141.00 99.50
Jun-21 Dry
May-92 -- --
Mar-17 -- 44.9
Mar-19 193.64 40.25
Sep-19 196.54 37.35
May-20 192.28 41.61
Nov-20 197.74 36.15
Nov-21 202.44 31.45
Nov-22 207.97 25.92
Nov-23 206.94 26.95
Nov-24 190.7 43.19
Notes:
1Groundwater depths for DMW-1 through DMW-4 calculated based on casing top elevation reported as of September 2003. amsl - above mean sea level
bwc - below well casing
-- - not applicable / no data available
DMW 1
DMW 2
Historical onsite data from 2003 Third Quarter Report For Groundwater Monitoring Activities at 2936 Industrial Parkway, APNs 111-291-027 & 028, Santa Maria, California , dated February 24, 2004 by Everest Services, Inc.

MAFI-DW1
233.89
237.74 208
199
200
207
215
238.21
236.19
236.43
Historical offsite (MAFI-DW-1) data from Annual 2024 Groundwater Monitoring Event, Report of Findings, 3037 Industrial Parkway, Santa Maria, California , dated December 2024 by Padre Associates, Inc.

DMW 3
DMW 4

Page 1 of 1 ends

Attachment B
Table 3
Historical Groundwater Analytical Results for Deep Water-Bearing Zone Monitoring Wells SEMCO, Santa Maria, California
Langan Project: 781016901
September 2025
Semi-Volatile
Organic
Compounds
1,1,1-Trichloroethane1,1,2-Trichloroethane
1,2-Dichloroethane
Cis-1,2-Dichloroethene
Dibromochloromethane
Tetrachloroethene (PCE)
Toluene
Trans-1,2-Dichloroethene
Trichloroethene (TCE)
Vinyl Chloride
1,4-Dioxane (P-Dioxane)
Petroleum Hydrocarbons
(C04-C12) GRO
Petroleum Hydrocarbons
(C13-C22) DRO
Petroleum Hydrocarbons
(C23-C40) ORO
Petroleum Hydrocarbons
(C14-C34)
71-55-6 79-00-5 107-06-2 156-59-2 124-48-1 127-18-4 108-88-3 156-60-5 79-01-6 75-01-4 123-91-1 PHCC4C12 PHCC13C22 PHCC23C40 PHCC14C34 200 5 0.5 6 801 5 150 10 5 0.5 0.381,2 NS NS NS NS
Sample Name Original Sample
Name Sample Date µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l DMW-1_120390 DMW1-12-90 12/03/1990 ND U ND U ND U ND U ND U ND U ND U ND U ND U ND U NA NA NA NA NA DMW-1_122890 DMW1-2-90V 12/28/1990 ND U ND U ND U ND U ND U ND U 1.3 ND U ND U ND U NA NA NA NA NA DMW-1_121598 DMW-1 12/15/1998 ND U ND U NA ND U NA ND U ND U ND U ND U ND U NA NA NA NA NA DMW-2_120390 DMW2-12-90 12/03/1990 3.0 ND U ND U 1.2 0.26 ND U 1.3 ND U 13 ND U NA NA NA NA NA DMW-2_122890 DMW2-2-90V 12/28/1990 ND U ND U ND U 2.1 ND U ND U ND U ND U 24 ND U NA NA NA NA NA DMW-2_121498 DMW-2 12/14/1998 ND U ND U NA 1.3 NA ND U ND U ND U 45 ND U NA NA NA NA NA DMW-2_092203 GWDMW2-092203 09/22/2003 ND U 1.7 0.5 97 ND U ND U ND U ND U 1,200 ND U 5.0 NA NA NA ND U DMW-3_032291 DMW3-3-91 03/22/1991 ND U ND U ND U 1.4 ND U ND U ND U ND U 21 ND U NA NA NA NA NA DMW-3D_032291 DMW3-3-91D 03/22/1991 ND U ND U ND U 1.4 ND U ND U ND U ND U 22 ND U NA NA NA NA NA DMW-3_121598 DMW-3 12/15/1998 ND U ND U NA ND U NA ND U ND U ND U 1.6 ND U NA NA NA NA NA DMW-3_092203 GWDMW3-092203 09/22/2003 ND U ND U ND U ND U ND U ND U ND U ND U 6.7 ND U ND U NA NA NA ND U DMW-4_032291 DMW4-3-91 03/22/1991 ND U ND U ND U ND U ND U ND U 6.5 ND U ND U ND U NA NA NA NA NA DMW-4_121598 DMW-4 12/15/1998 ND U ND U NA ND U NA ND U ND U ND U 1.4 ND U NA NA NA NA NA DMW-4_092203 GWDMW4-092203 09/22/2003 ND U ND U ND U ND U ND U ND U ND U ND U ND U ND U ND U NA NA NA 230 B166 B166 5/21/1985 5.0 NA 0.1 U NA 0.1 U 0.1 U 0.1 U 1 U 0.1 U 0.1 U NA NA NA NA NA B1667 B1667 5/30/1985 1.0 NA 1.0 U NA 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U NA NA NA NA NA B1668 B1668 5/30/1985 1.0 U NA 1.0 U NA 1.0 U 1.0 U 1.0 U 1.0 U 59 1.0 U NA NA NA NA NA MAFI-DW-1_050592 DW-1 5/5/1992 NA NA 0.5 U 0.5 U NA 0.5 U NA 0.5 U 7.5 0.5 U NA NA NA NA NA MAFI-DW-1_031517 DW-1 3/15/2017 NA NA 1 U 10.9 NA 1 U NA 1 U 60.1 3 U NA NA NA NA NA MAFI-DW-1_031519 DW-1 3/15/2019 NA NA 0.5 U 9 NA 0.5 U NA 0.5 U 45 0.5 U 1.0 U NA NA NA NA MAFI-DW-1_092419 DW-1 9/24/2019 NA NA 5.0 U 10 NA 5.0 U NA 5.0 U 56 5.0 U 1.1 U NA NA NA NA MAFI-DW-1_050720 DW-1 5/7/2020 NA NA 5 U 8.4 NA 5 U NA 5 U 79 5 U 1.2 U NA NA NA NA MAFI-DW-1_111020 DW-1 11/10/2020 NA NA 5 U 9.4 NA 5 U NA 5 U 65 5 U 1.2 U NA NA NA NA MAFI-DW-1_113021 DW-1 11/30/2021 NA NA 5 U 18 NA 5 U NA 5 U 63 5 U 0.59 J NA NA NA NA MAFI-DW-1_112822 DW-1 11/28/2022 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MAFI-DW-1_112823 DW-1 11/28/2023 NA NA 5.0 U 11 NA 5.0 U NA 5.0 U 100 5.0 U 0.65 J NA NA NA NA MAFI-DW-1_111824 DW-1 11/18/2024 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MAFI-DW-1
Location
DMW-1
DMW-2
DMW-3
DMW-4
2AS
Off-site Onsite
Analyte3
Volatile Organic Compounds Petroleum Hydrocarbons
CAS Number
Drinking Water MCLs

Page 1 of 2 ends

Attachment B
Table 3
Historical Groundwater Analytical Results for Deep Water-Bearing Zone Monitoring Wells SEMCO, Santa Maria, California
Langan Project: 781016901
September 2025
Notes:

Groundwater results were compared to California Title 2022 Drinking Water MCLs (November 2024) 1Groundwater results were compared to San Francisco Bay RWQCB Groundwater Direct Exposure ESLs - MCL Priority (July 2019) 2 The State Water Resources Control Board (SWRCB) has adopted a drinking water notification level (NL) of 1 µg/l.

CAS - Chemical Abstract Service
ESL - Environmental Screening Level
MCL - State Maximum Contaminant Level
NA - Not Analyzed or Not Available (Historical Data)
ND - Not detected
NS - No standard
RWQCB - Regional Water Quality Control Board
µg/l - micrograms per liter
Qualifiers:

J - Estimated concentration. Compound detected above the method detection limit and below the reporting limit.

U - The analyte was analyzed for, but was not detected at a level greater than or equal to the RL; the value shown in the table is the RL.

Exceedance Summary:
- Result exceeds Groundwater Direct Exposure ESL - MCL Priority 3 Groundwater analytical data is cited from the 1999 Tetra Tech report, Technical Report on Groundwater Monitoring, SEMCO Twist Drill & Tool Company, and the 2003 Everest Services, Inc. report, 2003 Third Quarter Report For Groundwater Monitoring Activities. 10

Page 2 of 2 ends

Attachment B
Table 4
Sampling and Analysis Plan
SEMCO, Santa Maria, California
Langan Project: 781016901
September 2025
Baseline
First Semiannual:

October-March 2025-
2026
Second Semiannual:

April-September 2026
Third Semiannual:

October-March 2026-
2027
Fourth Semiannual:

April-September 2027
Fifth Semiannual:

October-March 2027-
2028
Sixth Semiannual: AprilSeptember 2028
Seventh Semiannual:

October-March 2028-
2029
Eighth Semiannual:

April-September 2029
MW-1 to
MW-16
VOCs by USEPA Method
8260B
TPHg/d by USEPA
Method 8015-modified
1,4-Dioxane by USEPA
Method 8270
Gauge Depth-toGroundwater
Industrial Waste Water
Discharge Criteria (one
well/sample only)3
-- -- -- -- -- -- -- --
DMW-6.

DMW-7, and
MAFI-DW-1
--
VOCs by USEPA Method
8260B
TPHg/d by USEPA
Method 8015-modified
1,4-Dioxane by USEPA
Method 8270
General minerals1
Gauge Depth-toGroundwater
VOCs by USEPA Method
8260B
TPHg/d by USEPA
Method 8015-modified
Gauge Depth-toGroundwater
VOCs by USEPA Method
8260B
TPHg/d by USEPA
Method 8015-modified
Gauge Depth-toGroundwater
VOCs by USEPA Method
8260B
TPHg/d by USEPA
Method 8015-modified
Gauge Depth-toGroundwater
VOCs by USEPA Method
8260B
TPHg/d by USEPA
Method 8015-modified
1,4-Dioxane by USEPA
Method 8270
General minerals1
Gauge Depth-toGroundwater
VOCs by USEPA Method
8260B
TPHg/d by USEPA
Method 8015-modified
Gauge Depth-toGroundwater
VOCs by USEPA Method
8260B
TPHg/d by USEPA
Method 8015-modified
Gauge Depth-toGroundwater
VOCs by USEPA Method
8260B
TPHg/d by USEPA
Method 8015-modified
Gauge Depth-toGroundwater
2AS
Vertical Profiling for:

VOCs by USEPA Method
8260B
TPHg/d by USEPA
Method 8015-modified
1,4-Dioxane by USEPA
Method 8270
General minerals (single
sample depth only)1
Gauge Depth-toGroundwater
-- -- -- --
VOCs by USEPA Method
8260B
TPHg/d by USEPA
Method 8015-modified
1,4-Dioxane by USEPA
Method 8270
General minerals1
Gauge Depth-toGroundwater
-- -- --
Notes:

1. General minerals will include analysis for sodium, potassium, calcium, magnesium, chloride, carbonate, bicarbonate, sulfate and nitrate under USEPA Methods E300.1, SM2320B, SM4500, E200.8, SM2510B, and SM2540C.

2. One sample duplicate, equipment blank, and trip blank will be collected per field day and will be analyzed for VOCs using USEPA Method 8260B.

TPHg/d - total petroleum hydrocarbons as gasoline and diesel USEPA - United States Environmental Protection Agency
VOCs - volatile organic compounds
-- - not applicable
Well
Sampling Events2

3. Industrial waste water discharge criteria in accordance with City of Santa Maria industrial wastewater discharge permit requirements: arsenic, boron, cadmium, total chromium, copper, lead, mercury, nickel, silver, sodium, zinc, and total metals by USEPA Method 6020/200.8; cyanide by SM 4500-CN; hexavalent chromium by USEPA Method 7199; carbon and nitrogen (total nitrogen) by USEPA Method 415.3M; total phenols by USEPA Method 625.1; total identifiable chlorinated hydrocarbons by USEPA Method 624.1; pentachlorophenol by USEPA Method 4010A or 8270; biochemical oxygen demand by USEPA Method SM5210B; chemical oxygen demand by USEPA Method SM5220D; total suspended solids by USEPA Method SM2540D; total dissolved solids by USEPA Method SM2540C; total oil and grease by USEPA Method 1664A; chlorine by USEPA Method SM4500; and pH by USEPA Method 9040C.. Sample will be collected from MW-10 if adequate water is present for sampling.

Page 1 of 1 ends

Attachment B

FIGURES
Attachment B
SEMCO
Attachment B
SEMCO
Attachment B
SEMCO
Attachment B
Path: \\langan.com\data\SBA\data9\781016901\Project Data\ArcGIS\APRX\781016901.aprx © 2025 Langan
Project Figure Title Project No.

Date
Scale
Drawn By
Figure
Langan CA, Inc.
1" = 900'
AC
9/18/2025
781016901

SANTA BARBARA COUNTY CALIFORNIA

SANTA MARIA

PROJECT
104 W Anapamu Street, Suite 204B
Santa Barbara, CA 93101
T: 805.957.6000 F: 805.957.6001 www.langan.com
!?@ ED
ED
ED
ED
ED
ED
DMW-6
DMW-7
DMW-4
GW Elevation = NA
TCE non detect in 2022
GW Elevation = 43 feet AMSL in 2024
TCE = 100 µg/L in 2023
GW Elevation = 52 feet AMSL in 2017
TCE = NA
WELL 11S
CA4210011_011_011
WELL 8S
CA4210011_008_008
WELL 4
CA4200961_004_004
WELL 6S
CA4210011_006_006
WELL 2AS
CA4210011_001_001
MAFI: DW-1
EVERGREEN 02
CA4210016_003_003
10N34W34G002S
WELL 7S
CA4210011_007_007
09N34W03A002S
GW Elevation = NA
TCE non detect in 2024
GW Elevation = NA
TCE non detect in 1996
GW Elevation = NA
TCE = 59 µg/L in 1985
GW Elevation = 22 feet AMSL in 2023
TCE non detect in 2012,
as high as 7.4 µg/L in 2000 GW Elevation = NA
TCE = NA
GW Elevation = NA
TCE non detect in 2020
GW Elevation = Dry at 31 feet AMSL in 2021
TCE non detect in 2003
DMW-2
GW Elevation = Dry at 37 feet AMSL in 2021
TCE = 1,200 µg/L in 2003
DMW-1
GW Elevation = NA/Abandoned in 2021
TCE non detect in 1998
DMW-3
GW Elevation = NA/Not Located in 2021
TCE = 6.7 µg/L in 2003
GW Elevation = NA
TCE non detect in 2006
SEMCO
.
900 0 900

SCALE IN FEET
Legend
!?@ MAFI: Deep Monitoring Well DW-1
ED
Proposed Deep Monitoring Well
ED
Deep Monitoring Well
Water Supply Well
Inferred Groundwater Flow Direction
Approximate Site Boundary
Notes:

1. Aerial imagery provided by Esri.

2. All features shown are approximate.

3. TCE = trichloroethene in micrograms per liter (µg/L)

4. GW = Groundwater

5. NA = TCE data and/or elevation data not available.

6. AMSL = Above Mean Sea Level

7. Supply Well information obtained from Groundwater
Ambient Monitoring and Assessment Program Groundwater
Information System (GAMA GIS; June 2025) and Deep
Groundwater Well Location Map by West Environmental
Services & Technology (April 2025)
4 PROPOSED OFFSITE DEEP

WATER-BEARING ZONE

MONITORING WELL

LOCATIONS
SEMCO
Attachment B
9-inch borehole Bottom of boring Bottom of screen at 250 feet bgs 4 inch diameter well screen: Sch 80 PVC flush threaded, 0.020-inch slots #3 filter sand pack 5 feet Bentonite chip or pellets seal, hydrated Ground surface Cover Cement-bentonite grout (less than 2% bentonite) 4 inch Sch 80 PVC well casing 240 feet bgs 200 feet bgs 2 feet Interval Depth 193 feet bgs 2 feet 5 feet 5 feet Concrete (for well box) 9-inch borehole Bottom of boring Bottom of screen at 270 feet bgs 4 inch diameter well screen: Sch 80 PVC flush threaded, 0.020-inch slots #3 filter sand pack 5 feet Bentonite chip or pellets seal, hydrated Ground surface Cover Cement-bentonite grout (less than 2% bentonite) 4 inch Sch 80 PVC well casing 245 feet bgs 203 feet bgs 2 feet Interval Depth 198 feet bgs 2 feet 5 feet 5 feet Concrete (for well box) 40 feet 40 feet 205 feet bgs 198 feet bgs Place centrilizers on maximum 40-ft spacing Place centrilizers on maximum 40-ft spacing Drawing Title Figure No.

Project No. Date Figure 5 MONITORING WELL CONSTRUCTION DIAGRAMS 781016901 6/13/2025 ABU DHABI ATHENS DOHA DUBAI LONDON PANAMA NEW JERSEY NEW YORK CONNECTICUT PENNSYLVANIA WASHINGTON, DC VIRGINIA WEST VIRGINIA OHIO FLORIDA TEXAS ARIZONA CALIFORNIA 135 MAIN STREET, SUITE 1500, SAN FRANCISCO, CA 94105 T:415 955 5200 F:415 955 5201 www.langan.com Filename: \\langan.com\data\SBA\data9\781016901\Project Data\CAD_01\Environmental\781016901-N-SP0103_2025.dwg Date: 9/22/2025 Time: 10:51 User: agekas Style Table: Langan.ctb Layout: Well Construction Diagrams Date Issuances Description Date Revisions Description 9/19/2025
Attachment
B

APPENDIX A

WELL COMPLETION REPORTS AND BORING LOGS
Attachment B
Table A1
Existing Well Construction Details for Deep Water-Bearing Zone SEMCO
Santa Maria, California
Langan Project: 781016901
September 2025
2003 2021
Well
Completion
Log (1988 -
1991)
DMW-1 DMW-1 Abandoned NA 208 188 - 208 4 inches 237.74 237.9 Flush mount with traffic box
DMW-2 DMW-2 Sampled Located, well plug intact,
dry but moist at the bottom 199 179 - 199 4 inches 236.43 236.4 Flush mount with traffic box DMW-3 DMW-3 Sampled Not located 200 180 - 200 4 inches 236.19 236.38 Flush mount with traffic box
DMW-4 DMW-4 Sampled Located, dry 207 187 - 207 4 inches 238.21 238.44 Flush mount with traffic box
DMW-51
-- Dry Located, dry but moist at
the bottom 200.631
-- 4 inches -- -- --
2AS 2AS -- -- 247 182 - 238 -- -- -- --
MAFI-DW-1 DW-1 NA Sampled 215 175 - 215 4 inches 233.89 -- -- Notes:
1 Well location found during 2021 investigation and not previously noted on other maps or reports. Noted as "DMW5?" for the purpose of the 2021 investigation. 2 Well Head Elevation is presumed to be Top of Casing Elevation bgs - below ground surface
msl - mean sea level
NA - not applicable
Information gathered from the 2003 Everest Services, Inc. report, 2003 Third Quarter Report For Groundwater Monitoring Activities , the 2021 Analytical Consulting Group, Inc. report, Monitoring Well Investigation Report, Former Semco Twist Drill & Tool Company , and Well Completion Logs provided in Appendix A Surface cover
Well Head
Elevation2 (at
installation)
(feet above msl)
Ground Surface
Elevation (at
installation) (feet
above msl)
Well Status
Well Depth
(feet bgs)
Well Name
Screen
Interval (feet
bgs)
Well
diameter Boring

Page 1 of 1 ends

Attachment B
Attachment B
Attachment B
Attachment B
Attachment B
Attachment B
Attachment B
Attachment B
Attachment B
Attachment B
Attachment B
Attachment B
Attachment B
Attachment B
Attachment B
Attachment B
t
�ERCE

WELL COMPLETION RECORD
JOB NO. ·:, O'l. 73 .00' WELL No. l>MW3 HYDROGEOLOGIST CEb awd .sl- b cuENT .SE/'1 to DRILLER La.-3>1<- ·E11J vr�'t.211mexki
wELL LocAT10N 2..q 3, :r:�"--sil·;et..,.( ·pk_:J DATE/TIME s/e/c,1 @oei/D

GROUND SURFACE

DETAILS OF CONSTRUCTION
Date Completed 3 - 9 -q /
Borehole Diameter (in.) IC) -J&i\
Type and Size of Casing (in.) 4-1� LC. S 1"
Type and Size of Screen (in.) 'I '"'IM � S, 'ii
Screen Perforation Diameter (in.) o.c,·-l.D �,"'
Screen Length (ft.) 2. 0, 0 � f
Centralizer Depths (ft.) .NJi.�.�.-=._.

Completion Technique:
1) Type of Filter Pack and Placement
Method
Lhl, t!, I-a. v: :tt-3 / TtYrVL ,'-£. l 2 -r e of Bentonite ana P od '�_;_--=-�=-1---!.---=�UJ.'4-�� '�
Method
,Mel� � + IT.-�ie. p.s:,1.s
Descriptio�f Potential f4;,;ems With Well:

IJ_,::,/e-, '
� i.. c. "51 = Lt::JW Ca-.
.. l, .. 'V\, � 4-t!� (
4,t., 6S = Sfain /44,, .sl,:-ef
Development Technique
.s:"' bM.e""� ; ht:< 'Pu.1114 ·
GROUT

BENTONITE

FILTER PACK
Well Head Elevation ___ _
Ground Surface Elev. _____ _
Well Head Completion Method
"Tra� C. aux -. f/u.,i Jl'ttf.ul, 1-
Drilling Method/Rig Type
1::,ua,,I Tu,h. ( e._/1:>M l .�.j,ifr:'M S
Surface Casing: Type )//1.

Diameter __ _
Length __ _

MATERIALS
Cement (sks.) ?> :sic�
Filter Pack Material (tt.3 ) 'l sk,s
Casing Material (ft.) '2.l!JO--f!f
Bentonite (ft� ) 3 AiLc!.k 'f?f::.

I h 7. 0 Top of Bentonite Seat J '{, 7. Ott.
j? 3, 6 T / 7 2 I · op of Filter Pack �. t:) ft .
. Top of Screen /�rO ft.

Bottom of Screen 1.,o&.Ott . .
-Bottom of Hole 2�1, 0 ft.

NOTE: ALL DEPTHS AREREFERENCED TO GROUND SURFACE
Attachment B
--
I ,
�ERCE
'BORING NUMBER b MW 3

FJELD LOG OF BORING
SHEET -' OF --b
PROJECT NAME PROJECT NUMBER I !3.EVATJON AND DAllJM I LOCATION _SE)i tD ·i O '2. 7 ''3 • 0 0. t 2-C/ �' :XNiu.t,,fMd.,( p�" ORILUNG COMPANY DATE AND TIME STARTED l.a14 n.� t,,,, ,;,'�IJV'l�e'H. -k( DRILLER f'€ s \I' � 3-7-'II Q 11 30
DRILJ.Joo E
\

UIPMENT
't::> -n l �..t.; +�rK.-s

SIZE AND TYPE OP'BIT
I o-ik. C 'r8U v.L ._ IV\
DRILLING FLUID N�-e

SAMPLE HAMMER
TYPE n"+uma.�"
>-
8 en a: � w
..J DEPTH >
0 a. 8 s (FEET) :E
< w u, a:
--
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2..
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DRILLING METHOD l bw..e..( Wa.. L
COMPLETION oei+ 1� 1
HOLE DIAMETER NO. OF BULK ss
s;+ "'- IV\ SAMPLES '-/ -
DRILLING ANGLE ,s WA'TER FIRST
LEVEL
1 L/eJ-/k

I HYDROGEOLOGIST/ DATE
DRIVING WT. DROP 3t::)-� � CE't>I 6L. b

ESTIMATED
§� ..J 0 mu

DESCRIPTION
�\,-A.\\. .Q.\�-l-- 4-e "Md� LJ,M-a ra.111\.-tJ
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DATE AND TIME COMPLETED
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TOTAL NO. OF S,AMPLES
3/
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CHECKED BY/ DATE

COMMENTS
l C 7r---, ',.f- I'Ii f) , j
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Attachment B
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I I
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� ERC � � Environmental
and Energy
Services Co.

I BORING NUMBER t> i"l bl .3
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DEPTH _, 8 CL.
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FIELD LOG OF BORING (CONTINUED)
=== !i 9�
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Attachment B

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and Energy
Services Co.
'BORING NUMBER t> M h/3
> > § u, a: w w
DEPTH it
(FEET) ::::2 8 ui w
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DESCRIPTION
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Attachment B
� ERC � Environmental
and Energy
Services Co.
'BORING NUMBER t> M \v 3
> re § m w
DEPTH �
(FEET) == 8 -c
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FIELD LOG OF BORING _(CONTINUED)
;: � 9:::::1 m8

DESCRIPTION
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Attachment B
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� ERC .,..=, Environmental
and Energy
- Services Co.
'BORING NUMBER D M 'W -s
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DEPTH ... 8 0 � § {FEET) <B !
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FIELD LOG OF BORING (CONTINUED)
== !z 9� DESCRIP.TION
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ESTIMATED
u, 0
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COMMENTS
.

Attachment B
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�ERC
� Environmental
and Energy
Services Co.

IBORING NUMBER D ,"-I w 3
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DEPTH I (FEET)
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==� g::::, m 8

DESCRIPTION
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Attachment B
�ERCE

WELL COMPLETION RECORD
JOB NO. ':>0173 & 00 i
cuENT :s/E Meo
WELL NO. J>jv) W '/HYDROGEOLOGIST f!e O av;uf �i..., b
WELL LOCATION 2'13-b �U5fuaf 1"?/rJ

GROUND SURFACE

DETAILS OF CONSTRUCTION
Date Completed ---''3=---_'l ___ -_q_l ___ _
Borehole Diameter (in.) l 0-,�
Type and Size of Casing (in.) '-1 ... ,� . LC S
A
Type and Size of Screen (in.) Lf-i� 6�"
1 Screen Perforation Diameter (in.) D.o'lO-Jv..

Screen Length (ft.) 1. o,c-#�
Centralizer Depths (ft.) AlA.._,_:_,-=-.--=-•
Completion Technique:
1) Type of Filter Pack and Placement
Method
L 0'\C:'> 1-a \- :il:3 f trt!M, .. :f
2) Type of Bentonite�nd Placement Method
i/'t -i\.\ \Jo iela. T&t.� l--e ·
3) Type of Grout Mixture an
Method V cl e\aj 6!'.RY-± } T .-,:,,.,,; � {7-!. 4:J,;) Description of Potentiat'Problems With Well:

Ne+-4
� -Le..,... _ _ :S_= __ �
-=--
. _"-'_Ca_v-....,..�-,:w,-6-+-c:_r:_I_
re � � :S = � 4-a,�I� :, t-t:-e l
Development Technique
..s '" b ""t:v:12·, b 1-e P le m. f .

DRILLER L a.j n <: Lmti r-,,,,m ev,, Jd
DATE/TIME 3fe;/ct1 @ oq 15· , i
,,
,: 1
I
'
= i'78,S
= 185". 0
= ifJ'l .. O
Well Head Elevation ___ _
Ground Surface Elev .. ___ _
Well Head Completion Method
7raB'ic 130,(
Drilling Method/Rig Type
Diameter __ _
Length __ _

MATERIALS
�eFAent (sks.) 3 5k"':,
Filter Pack Material (ft.3 ) 'l S /c S
Casing Material (ft.) ·J... I 0
Bentonite (ft� ) ·41 ba ckcb
Top of Bentonite Sear i/8.,.:S' ft.

Top of Filter Pack iSS. 0 ft.

Top of Screen i 8 h O .ft.

GROUT

BENTONITE

FILTER PACK
;;.:�:r.i?�l��i:,
Bottom of Screen J..C 7. t:> ft.

Bottom of Hole 1.�et� ., · ft.

NOTE: ALL DEPTHS ARE REFERENCED TO GROUND SURFACE
:. ,· · .
'•
Attachment B
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I BORING NUMBER .t> 1'1 'W j

PROJECT NAME

FIELD LOG OF BORING
SHEET _J OF ---12._

PROJECT NUMBER
Sc,A,f t: D ·:; 0 2. 7 3 , C o J I ELEV A TION AND DATUM I LOCATION i.q ··; � I,�u ;h"t�( ·pk�
/ I

DRILLING COMPANY
�Lij t1.<: e,;1 ,l ;l/'"b,'\i"ett. Ja. (
DRILLER + ·
!> -ev ,e_
DATE �D TIME rAR_TED
•·3 ·- B ·-q I J 300
DATE AND TIME ;°
MPLfilED_ ·3 ,.q ·-9 ( o'J • o
DRIU� E\

UIPMENT
·t;>...; l �"'� +�..--,i.�-s
SIZE AND TYPE OF"BIT
10-i"" C V'c>c.J �,.,.L � I�
DRILLING FLUID NM,e

SAMPLE HAMMER
TYPE /ti.(.. �:J.i_·t,
>
§ (I) a: LLI LLI
DEPTH ..I
0 Q. iS
e (FEET) :::::e (J � w
..I a:

2..
"
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,z..
h(
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If
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"2."
-ze
�RILLIN( METHOD " l COMPLETION DEPTH, TOTAL NO. OF S'AMPLES b'4.£- Wa. L �o c,, "/· 3
HOLE DIAMETER NO. OF BULK ss DRIVE l
p
rr�
5;+ IC)- ,� SAMPLES - � -·
DRILLING ANGLE ¢
,
WATER
LEVEL
FIRST ' ( � �,
AFTER _!.:L_HOURS IS· � '"' 1&7 +i

HYOROGEOLOGIST/ DATE CHECKED BY/ DATE
DRIVING WT. '--ltJ-1 b DROP �30 ·-� h C El;:,) �I-. b j . 3�q� ( == !z g::,
m 8

DESCRIPTION
.S � ,i"' , 'M. -ftlt'.,t.M. - � c..Ca� -,1.'etl� e,�
�1,l ;1.. � �t\,V\� - .b � V\ MLH. '.:, v-,
IJ>J Ll-c:..Ao.i' +-e�
·1 ,
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�-r-/i\,�-( L &19 .., . .P
'Zn .f-d'f. � ��J�,J. /I L1.u � / J ?-c .J-1� JJ.1:.C
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":l rn ,t, . {!_t)t.1v--je-(!, •• -,a,·""�A �av1."l.,
\ ,;, k "'" ·h�""' '.9'A
d:, " -· -� 1-c�t
Set me v�
V -
�O't5 +..k,etJrM.I) 4.
{rr._,,;, "2JI'
I
a-f- "2. 2. ·-,# ·/.-

ESTIMATED
cn a PERCENT OF
� ID COMMENTS ::,�
en GR SA Fl
..
�� ' 84 1i-S
CL
:;�. e.r; ,�
-S? q5 .s
,sp i'fi s
Attachment B
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and Energy
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I BORING NUMBER 't:> M w "
►
§ 8)
DEPTH -' 8 0 (FEET) :::
< w
-' 0 a:

32. 3 :.J
3�
� � ...I :::,
m 8

FIELD LOG OF BORING (CONTINUED)

DESCRIPTION

ESTIMATED
u, o PERCENT OF
fA m
:::, ;! u, GR SA Fl
SHEET ·Z, OF�

COMMENTS
·-···-----
5S --&---+-c�-4-,,�,......1--------------------f--+---t--t--+--------------t ·u Ii/ o /( -t:'.<;.6'l/'-c'1!1,·1
+ ,. ✓ I ,_J \) I '
,r ---'--+-�-�-��L..J:-�-��=--------------+--+-1--+-�H��, ;-1T,��/t?Yl...;._· __ --t �� -....J-�-1---1----------------+---+-+--+---t---------, Attachment B
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IBORING NUMBER
'bM hi Jj
► ►
§ (I) a: w
DEPTH _, >
0 C. 8 e (FEET) ==
c[ w
_, (I) a:
72 -
7'/
7i.,
7B ':Y'
fJ,O

82..
£!,y
8b
8#3
�,o
')·i.

C/v
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�,e ,:.,
iOO
,en.
. to/
tt:J(;,
1013
� � _.=> m8
,�
(U
-..;
�
"
"1..'"l
FIELD LOG OF BORING {CONTINUED)

DESCRIPTION
.5C{V\.lt::.. lLl ,t.A- & � -f:'+
5 i { .L_, 5 t'v"'-t� 0. •'d. c,.1..,c:J. .. . ,.>,.�i-W.-1--€ ·h.-., '- '+ l� 1 l ... t,vl-&t '7 , l'\k:"? -<1.tl- ., k,l ,__, ·
./, c;:::. -�c.,,,.., 4 , (a,,t";;,..J...'2.__
.1HL-�l •�w_ \ c� :� --��\.i-��?
n\-eA,uM - �) c:ca..v-�e-i'�-,,, � < J ..:v,.��J
u,1.�·& �\\M,1:V- �,� 1 ·L .J
di""VL �ttJe hr 11 , /.P✓11�
&c.,,--.JA?.. .
.I
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I
/, �A f- hr-�Yl'
1/1 ·
/i./JW/J .J J., • lg:1.·:, ..17 ✓A�c..J2t I -- t c, ,./.o 6-,;. . 1
� C>c..'Y" ,'-1 - t " ')c,-•,.._ . k;' ·: .,(_ . l J- · - 1.-1,.,,'_{,i,.._ "5;:...., •
"' .,.
lvo ;? -e, cc: \.'-f:"•'4
)
.St;l_ll\ckc , Ct vtl•'-"<,.l l(:)k-t 'b�:v.

Jo� ,J JU-crl!J,,,{ �, ;_ct.,, �l -f2.r.-l'-M
7 .
t.' ; 5-(�, +c, ·2 ... ,V\+� c�---lu �:,t.Y.,_.kA.

T t J < 7
Y\1 .P Ju:u,1,,\-- -.\..o c,._oc?..,·� -::1 r-r!t. •n �A �?--',1;\.l't l.l.J ll v..,.;f:eA' . )�� .. \. llA .,9 ,:.:.. I-. 7 ., .1 L�vu:.-' �
.·
(!_e>().� ·-C) .--�:l f;I --e&e S ti.'l,,✓-,t u,,./ Ci'r-oi'-'1.... ./\,'-1'.Zl,t..-y-e , L&c,-� I) ,r.-.�v--'4-r-..-.;�: Jc:,,{ ,

ESTIMATED
...
u,O PERCENTOF
� m
:::,�
en GR SA Fl
Sm 0 t? ,s
Jlo q,< 25
::,? D t/5 5
w, l:.-D ·7,� 5
- -
Cxc fa; -� .s
5? t, /(Xi D
t:to 5 1t;s 6
SHEET _LOF __fu_

COMMENTS
jlJ5 0
)/ /- la !t.- & ��U* --J• . -,e-· ' 't;:l.4..
all-� //i-f{-er�(
l6c:.,.:)_.(,_;_ �-ire, "..,L· (.
-
�ro�z C)'-J,-a ./ ... - ( • • t{} ,) cc�,. {-{
Attachment B
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I BORING NUMBER 'C) ./YI \v �
> > 8 Cl) cc UJ UJ
..I DEPTH ..I 8 c..
(FEET} ==
4 UJ
..I Cl) a:
iJ ·2..

II '1
,, "
i/8
C, iAO
lz ..2.

JJ..tl
lL�
126
t"�O
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iv-i__
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,
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lt/e
·
·
·
-··- -·
·
· ··-
== � g::::i m8
FIELD LOG OF BORING _(CONTINUED)

DESCRIPTION
San,\.. e t-l4-.. et---4- £(9 � /
c_ \a"1 .!,f_.,. , �:,�:;,vtk arel<l-'.{ , ✓J LU 6....c1-L"-z�:.,,1 � ��-;;{ . t/ . ,,, ,+' "v--cr(.,,• J ., hl"'X'.� ?l.�+t'_ck, �'\-1..t,'--( � . t ·&I L-.11,u.( � r�-1�\ ·h \ ✓, "'Z-,-( � '
•J (
\V
-s·1 \ �--1 �\'\ " 1:..-� . l'¼..-ediu' nA -di ,-�i in I � •.._C �£/ j;;� L -;, h + h ;-�. �1 : lb-� I /-s-:,� kc£
!llC1?'+·-' /�_pJ Z.. v.-· -12. 7 -F'r- - 1 ;-q_ r../<,l l a•;-et-· < l
-� e:.l�.Lt -c�, .(;;� � - �_.,,1,\_e-�XtaH,I -
J. ., ': · ...i ' �f
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_, Jl � ' ,
1-1,;<, ·
·
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/
I
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J
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Sc-,,·a,.� <
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c \ /\.'--', t'"-• 5? L�.tL,I "''f v-tl(.,1.4- l . "j,C°l"'�- k. ·k.
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��+4 •
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I

ESTIMATED
...
u,O PERCENTOF
� ca
::::, ;! u, "GR SA A
5(A} 5 95 0
Goe. ''-') 2< i.S
�m Bo 2()
9tb 75 ,s
S(.. � ..Le
G<::. ?D z..5 "2S
SM io 7c LC
6•1-\ 5 C, 2...1:: -; ('·
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�c '5l1 LS L5
SHEET ;_/ OF--'._

COMMENTS
Attachment B
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I BORING NUMBER O j� ·w lf . ,
>
§
...
·// C..}\ /
/ ·/ / // /
/ Q L/
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1?
(I) re LLI w
DEPTH ..J 8 a. 3: !z
(FEET) ==
c( w g::,
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154
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lb#
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ltJB
i70
i'72..
174
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118
Ji!,c .

IEJi....
let(
186'
it7�

FIELD LOG OF BORING (CONTINUED)

DESCRIPTION
�,
C.\a,.,1 e"1 e:, C\. �\ ,lu. C! .. -c:. I :-..._ ( 1.,'--t'-" -k�v-K \ ..
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a i-a c·-tJ . ��illh V ·J -
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M .PA 1· u i,11 - -1-,.)
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l�ck ..i( Cl -+ e � l)l CQ.-;, � �,
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SHEET 6 OF�

ESTIMATED
...
u,O PERCENTOF
� m COMMENTS ::,� m .GR SA �
·-� _ _c:, ·- c7 ( 6:' C)<,;, 55
C�c., So 2� 2._S' f' r-�t-{01 ,c: >,A.( ///11 .;
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Attachment B
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I BORING NUMBER l) ,'v) 1,J 1
> >
§ u, a: w w
DEPTH ..J >
0 c.. 8 e (FEET} ::e
cc
(I) a:
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FIELD LOG OF BORING _(CONTINUED)
== !z 9=>
m 8

DESCRIPTION
-Q � ... � M.�' lw\11,'\..-- �c-,z-�- 9;�,n�, 5,e"�' t
u,/ ,, ... a"�-�x-k.A>�· { f., �a.f-<,L.·ta, �£,
6 ·r--a.. �- l �l, "',,, , • ,._Q_ ( ¾l i\ -e - ..\c>) c:c� t �---- c1 r-a, ;, 1::J�i1rul ;_,:; {--t. � .. --L-+ Yl,,tc�ke�-rA, "�
ll �1/' I l, ...: VY'- f-:r-,.,(_ '
,
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J 'J J' I i
Sciv\.� G �--rz. '--,..( 1 d -b� 1 1 � . · ., r; ul�i.:....-k ;1 1 5�Ji.!, C-c...<>a �"-£� .. -£✓ l;L <:J
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µ ,,
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- - -

ESTIMATED
...
u,O PERCENTOF
� ID
:::,� UJ .GR SA �
r;-p lo as" s
�{,() rD �5 5-
L
(:,q_, ft.":() l.{,C
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---..

SHEET..i_oF�

COMMENTS
..
c,<1 CD
-- -
Attachment B
Attachment B
Attachment B
Attachment B

APPENDIX B

HISTORICAL GEOLOGIC CROSS SECTIONS
Attachment B

GOLF COURSE
I ·1 -1 I ·1 I I I I I I . I i -, . I I I I I I I- I I I I · 1 I I I I I I I I I I I I I I I I I - I I I I . I 1 · I · 1 I I I I I I I I I I I I I · 1 I I I I I I I I ·1 I I ®N•
�ffjh� DMW4

PARKING LOT
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and Energy
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.
�NB18 NB10 Ci>NB42
NB39� NB17 · .

NB 14
Ci> .
.

NBB &
(MW4)
. (MW7)
NB22� NB 12 S�f1B38 " · · -· 'l!> NB11'LB31
w-i�--.--... MW3_Nl} . g B26
.• . NB.33 • N 34 . MW1"'• . ·. e, B D84 •
·NB3S
15 QNB40 _a) @ NB18
�DMW3

LANDSCAPED
®NB20
AREA

INDUSTRIAL PARKWAY
eortng and Cross-Section Location Map
A'
I
<i> NBB
DMW1
NB7
(MW5)
OLD FOUNDATKlN
WELL 2AS
.,
a 100
. FEET
LEGEND
I
$ BORING AND MONITOR WELL LOCATION
@ BORING LOCATION -CROSS-SECTION TRANSECT

FI GU RE
3- 1
I
-----------�----.;.._-------�-------------- ------_, .
___ ___J
Attachment B
f
240'
220'
200'
180'
>·
w
. _,
�
w 160'
z
. w
0 140'
�
w·
Z·
.Z 120'
0 �.

UJ
UJ
100'
80'
40'
20'
.,,._ ERC ..,. � Environmental
and Energy
Services Co.

A
(NORTH)
3 ,-
m
Q
SP
SP
SP/SC
SP
SP
SM/SP · SP
SP SP
SW/GW
SW/SP
SP
SP
SW/SP
SW/SP
N i:l3 N
·· �
CC en
SP/SC
SP/SC
SC
SP/SC
SC
.sw
SM
SP
SC
SP/SW
SC/GC
SC/GC
SP i
· sc/GC
SW/SP
SC/SP
·
· sp
SP
SM/SC
GW
SC
GW
SC
SC
GC
SP
GC
GC
GP
GW
GP/GW
SP
SP
SP
SOP
GW/GC
�
Q
SP
SP
SP
SM
SW
SW
SM
SC
'
Geologic Cross-section A·A'
. N
m
Q i.

A'
(SOUTH)

C GROUND SURFACE

SP , SP
SM
SM/SC
SM
SP
SP/SC
GP
SP
SP
SW
1: SP
.. SP
GC
SW
SW/SC
SW
SW
SC
SW
SW
GW
SC/SP
GM
GC
GC
SM·
GM/GC
GC
SP
ac·
GC/GW
GW/SW
.. GW/SW

EXPLANATION
\l . Reg Iona I Water Table Elevation
ML· . uses Classlflcatlon
-pp:J · Fine-grained llthotogles
. .
.. .... . such as ML, CL, and CH

FI GU RE
3-2
Attachment B

GOLF COURSE

I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I ®NB9

I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I

PARKING LOT
� ERC .... � Environmental
and Energy
Services Co.
®NB17
NB22�
(MW11)
NB 12
� (MW6)
3 Mw1 · .. ·. ·.
@
NB1
l-r-7""""7'--,-....,.......,.--r-,-..,......-:,�...-""'7"1 �

LANDSCAPED
AREA

INDUSTRIAL PARKWAY
NB 15
(MWS) @ NB19
Cross-Section Location Map
0 e·
• NBS
NB7
(MW5)
FEET
100

OLD FOUNDATION
WELL 2AS
LEGEND
� MONITOR WELL LOCATION
@ BORING LOCATION -CROSS-SECTION TRANSECT
FIGURE
___________ __;_ _______________________________ _ @]
Attachment B
�
I
A
WEST
0- NB6 NB13 D81

SP SP/SM SP

SP/SM SP/SC SP

SM SP/SM SP/SC
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Attachment B

WORK PLAN FOR ONSITE SOIL VAPOR EXTRACTION
for
2936 Industrial Parkway, Santa Maria
Santa Barbara County, California
Prepared For:

County of Santa Barbara
City of Santa Maria
Santa Maria Public Airport District
Prepared By:

Langan CA, Inc.
104 West Anapamu Street, Suite 204B
Santa Barbara, California 93101
Dorinda Shipman, PG CHG
Principal
Cory Lavoie, CHMM, PMP
Principal
Christina Rain, PE
Senior Project Manager
22 September 2025
781016901
Attachment B
Work Plan For Onsite Soil Vapor Extraction
2936 Industrial Parkway, Santa Maria
Santa Barbara County, California
(Global ID No. SLT3S0301290)
22 September 2025
781016901
Page i

TABLE OF CONTENTS

1.0 INTRODUCTION.............................................................................................................1

1.1 SVE Remedial Goals and Data Quality Objectives ..........................................1

1.2 Work Plan Organization ....................................................................................2

2.0 BACKGROUND ..............................................................................................................3

2.1 Site Description and History .............................................................................3

2.2 Site Geology.......................................................................................................3

2.3 Site Hydrogeology.............................................................................................4

2.4 Prior Site Investigations and Remediation .......................................................5

2.5 Recent Sampling Results ..................................................................................5

2.5.1 Soil ..........................................................................................................5

2.5.2 Soil Vapor...............................................................................................6

2.5.3 Indoor Air................................................................................................6

3.0 SVE DESIGN BASIS AND CONSTRUCTION METHODOLOGY....................................6

3.1 SVE Design.........................................................................................................6

3.1.1 Pore Volume Exchange Assessment ....................................................7

3.1.2 SVE Radius of Capture...........................................................................7

3.1.3 SVE Layout .............................................................................................9

3.2 Pre-Implementation Activities ..........................................................................9

3.2.1 Site-Specific Health and Safety Plan .....................................................9

3.2.2 Access and Permitting .........................................................................10

3.2.3 Survey and Utility Clearance...............................................................10

3.2.4 Agency Notification..............................................................................10

3.3 Well Construction Methodology.....................................................................10

3.3.1 SVE Well Construction.........................................................................10

3.3.2 Well Box Installation at Existing Soil Vapor Monitoring Probes ......11

3.4 SVE System Equipment ..................................................................................12

3.4.1 Vapor Extraction and Treatment Equipment.....................................12

3.5 Air Emissions Controls ....................................................................................13

3.6 Contingencies ..................................................................................................13

3.6.1 Groundwater ........................................................................................13

3.6.2 Potential Short Circuiting ....................................................................14

3.6.3 Location and Elevation Survey............................................................14

3.6.4 Site Power Supply Evaluation.............................................................15

3.7 System Telemetry Requirements ...................................................................15

3.8 Waste Management ........................................................................................15

4.0 SVE OPERATION, MAINTENANCE AND MONITORING............................................15

4.1 SVE Startup Testing........................................................................................15

4.1.1 Startup Phase Groundwater Levels ....................................................16

4.1.2 Sampling...............................................................................................16

4.1.3 Construction Completion Report........................................................17

4.2 Performance Monitoring .................................................................................17

4.3 Remedial Goals, SVE Discontinuation, and Contingency VMS....................18 Attachment B
Work Plan For Onsite Soil Vapor Extraction
2936 Industrial Parkway, Santa Maria
Santa Barbara County, California
(Global ID No. SLT3S0301290)
22 September 2025
781016901
Page ii

TABLE OF CONTENTS
(Continued)

5.0 QUALITY ASSURANCE/ QUALITY CONTROL ...........................................................19

5.1 Field QA / QC Procedures................................................................................19

5.2 Laboratory QA / QC Procedures .....................................................................20

6.0 REFERENCES ...............................................................................................................21 TABLES

FIGURES
781016901.03 Work Plan for Onsite Soil Vapor Extraction Report_2936 Industrial Parkway Attachment B
Work Plan For Onsite Soil Vapor Extraction
2936 Industrial Parkway, Santa Maria
Santa Barbara County, California
(Global ID No. SLT3S0301290)
22 September 2025
781016901
Page iii

ATTACHMENTS
TABLES
Table 1 Onsite Well Construction Summary
Table 2 Historical Groundwater Elevation Data (Shallow/Perched Zone) Table 3 Proposed SVE Well Construction Details
Table 4 Preliminary Estimated VOC Emissions

FIGURES
Figure 1 Site Location Map
Figure 2 Site Plan
Figure 3 Shallow/Perched Groundwater VOCs and 1,4-Dioxane Concentrations Map
Figure 4 Soil Sampling Locations Map
Figure 5 Soil Vapor TCE Concentrations Contour Map
Figure 6 SVE Schematic Layout
Figure 7 Soil Vapor Extraction Well Construction and Wellhead Diagram

APPENDICES
Appendix A Available Well Completion Logs and Boring Logs Appendix B Historical Subsurface Profiles (by Others)
Appendix C Historical Groundwater, Soil, Soil Vapor, and Indoor Air Data Table C1. Historical Groundwater Analytical Data (Shallow/Perched Zone) Table C2. Historical Soil Analytical Data
Table C3. Historical Soil Gas Analytical Data
Table C4. Historical Indoor Air Data
Appendix D Permit Application Forms
Appendix E Contingency Retrofit Vapor Mitigation System Basis of Design Attachment B
Work Plan For Onsite Soil Vapor Extraction
2936 Industrial Parkway, Santa Maria
Santa Barbara County, California
(Global ID No. SLT3S0301290)
22 September 2025
781016901

Page 1 ends

WORK PLAN FOR ONSITE SOIL VAPOR EXTRACTION
2936 Industrial Parkway, Santa Maria
Santa Barbara County, California

1.0 INTRODUCTION
On behalf of the County of Santa Barbara (County), the City of Santa Maria, and the Santa Maria Public Airport District (Agencies), Langan CA, Inc. (Langan) has prepared this Work Plan for Onsite Soil Vapor Extraction (SVE) at the former SEMCO Twist Drill and Tool Company, Inc., (SEMCO) Site located at 2926, 2936, 2946, 2956, 2976, and 2986 Industrial Parkway, Santa Maria, Santa Barbara County, California (the “Site”) (Figure 1).

The Central Coast Regional Water Quality Control Board (CCRWQCB) has identified the Site as CCRWQCB Case No. S28 (SLT3S2411351).

This Work Plan provides the proposed scope of work for onsite SVE as outlined in the terms of Settlement Work contained in the Settlement Agreement between the CCRWQCB and the Agencies (Settlement Agreement). The SEMCO Site is currently also subject to the CCRWQCB Order No. R3-2023-0070 (Order) for the investigation and cleanup or abatement of volatile organic compounds (VOCs), petroleum hydrocarbons, and 1,4-dioxane reportedly discharged at the Site.

1.1 SVE Remedial Goals and Data Quality Objectives
The Site has elevated concentrations of VOCs, petroleum hydrocarbons and 1,4-dioxane in the subsurface.

The Site contaminants of concern (COCs), as defined by the CCRWQCB in Order No. R3-2023-0070, are listed below:
• Trichloroethene (TCE)
• Cis-1,2-dichloroethene (cis-1,2-DCE)
• Trans-1,2-Dichloroethene (trans-1,2-DCE)
• Vinyl Chloride
• Petroleum hydrocarbons, and
• 1,4-Dioxane
These COCs have been detected in groundwater, soil, and soil vapor onsite as described further in Section 2.5. Figure 2 shows monitoring well and previously used extraction well locations and Figure 3 provides VOC and 1,4-dioxane concentrations in shallow/perched groundwater. Figure 4 shows previous soil sampling locations and Figure 5 provides TCE concentration contours for soil vapor. TCE has been detected Attachment B
Work Plan For Onsite Soil Vapor Extraction
2936 Industrial Parkway, Santa Maria
Santa Barbara County, California
(Global ID No. SLT3S0301290)
22 September 2025
781016901

Page 2 ends

at the highest concentrations in soil vapor and is the COC driving the need for remediation. The Settlement Agreement has set SVE remedial goals based on TCE concentrations in soil vapor. The remedial goals require the SVE to operate until one of the two following remedial goals are met:
(1) TCE concentrations in soil vapor have reduced to a concentration of 3,000 micrograms per cubic meter (µg/m3) based on a human health vapor intrusion risk level of 1 x 10-5incremental lifetime cancer risk (ILCR) (based on an attenuation factor of 0.01); or (2) If the first remedial goal (1) is not met, the SVE system has operated for two (2) years (and accounting for any SVE System Interruptions as set forth in the Settlement Agreement), and TCE concentrations have reduced to a concentration of 30,000 µg/m3 or less and based on a risk level of 1 x 10-4ILCR; then the remedial goal shall be achieved by installation of a vapor mitigation system (VMS) at the former SEMCO building. After installation, the SVE system, including VMS, shall be owned and the responsibility of the current owner of the SEMCO Property.

To determine if remedial goals are met, the SVE system will be shut down and soil vapor samples will be collected following a suitable rebound period based on the site-specific conditions and findings from shutdown sampling events at weekly intervals until concentrations are stabilized or can be used to estimate rebound time constants (DTSC, 2011). These soil vapor samples will be collected to represent equilibrium soil vapor concentrations following the removal and treatment of soil vapor by the SVE system. Remedial goals will be compared tothe 95% upper confidence level (95% UCL) of the mean soil vapor concentrations, calculated using data from existing soil vapor probes SV8, SV11, SV12, SV15, SV16, and SV17 and five of the SVE wells that will be installed/utilized for SVE remediationSVE-1, SVE-3, SVE-5, SVE-6, and SVE-8 (Figure 6).

1.2 Work Plan Organization
This Work Plan is organized as follows: Section 2.0 presents background information including a description of the Site and its history, the geologic and hydrogeologic setting, a summary of prior Site investigations and remediation, and the current extent of soil and vapor contamination in the shallow/perched zone; Section 3.0 outlines the SVE design basis for the proposed SVE system; Section 4.0 presents the SVE startup, and operation, maintenance, monitoring and reporting program; Section 5.0 outlines quality control/quality assurance (QA/QC) requirements for field and laboratory procedures; and Section 6.0 provides the documents referenced in this Work Plan. Supporting information is included in the attached tables, figures, and appendices which follow the text.

Attachment B
Work Plan For Onsite Soil Vapor Extraction
2936 Industrial Parkway, Santa Maria
Santa Barbara County, California
(Global ID No. SLT3S0301290)
22 September 2025
781016901

Page 3 ends

2.0 BACKGROUND

2.1 Site Description and History
The approximately 7.31-acre Site is comprised of six parcels (Santa Barbara County Assessor’s Parcel Number [APNs] 111-291-035 through 111-291-038, 111-291-041, and 111-291-042) located in Santa Maria east of the Santa Maria Public Airport. The Site is bounded by Industrial Parkway and commercial/industrial businesses to the west, commercial/industrial businesses to the north and south, and the Santa Maria Valley Railroad Trail followed by the Santa Maria Country Club to the east. The nearest residential neighborhood is east of the Santa Maria Country Club over 1,000 feet from the Site. An inactive Santa Maria municipal water supply well (Well 2AS), which was shut down in 1985, is located near the southern Site boundary. Apart from an easement to the City of Santa Maria for Well 2AS, the Agencies do not own or control the Site.

As described by the CCRWQCB Order, the Site was developed in 1942, when it began operation as part of the Santa Maria Lompoc Army Air Base until 1946. From approximately 1949 to 2001, the Site was occupied by a precision tool manufacturing business producing precision drilling bits and related cutting tools operated by SEMCO. SEMCO used cutting oil (a petroleum hydrocarbon-based lubricant), TCE, and 1,1,1-trichloroethane (1,1,1-TCA) onsite during unstated and apparently disputed time periods. VOCs were reportedly stored onsite in aboveground storage tanks (ASTs) and the cutting oil was stored in an underground sump. The United States Army had at least two underground storage tanks on the property (T1242 and T1273). Based on previous sampling results available on GeoTracker indicating elevated concentrations of total petroleum hydrocarbons, TCE and 1,1,1-TCA, CCRWQCB suspects SEMCO discharged waste on the property. Former municipal supply Well 2AS was reported to have TCE concentrations of up to 59 micrograms per liter (µg/L) between 1984 and 1985, above the drinking water standard of 5 µg/L1(Cleanup and Abatement Order No. R3-2023-0070 Former SEMCO Twist Drill and Tool Company, Inc. et al., 2023).

2.2 Site Geology
The Site is located inthe Santa Maria Valley in Santa Barbara County, California. The regional geology consists of Pliocene to recent fluvial river channel deposits, alluvium, and terrace deposits surrounded by the Orcutt and Paso Robles formations and tertiary rocks and terrestrial sand dunes. Various tectonic events created the California Coast Ranges and the Transverse Ranges of Southern California, which are present to the south, west and east of the Santa Maria Valley (Worts, 1951).
1 San Francisco Bay Regional Water Quality Control Board (SFRWQCB) Groundwater Direct Exposure Environmental Screening Level (ESL) – Maximum Contaminant Level (MCL) Priority (July 2019).

Attachment B
Work Plan For Onsite Soil Vapor Extraction
2936 Industrial Parkway, Santa Maria
Santa Barbara County, California
(Global ID No. SLT3S0301290)
22 September 2025
781016901

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Subsurface lithology at the Site has been characterized as four lithologic units based on past investigation activities at the Site (Analytical Consulting Group, Inc. [ACG], 2021a). SVE implementation is intended for the shallow/perched zone. This zone is the uppermost unit (Unit 1) from the ground surface to approximately 38 to 40 feet below ground surface (bgs). This zone consists of clayey fine- to medium-grained sand and silty fine-grained sand, to a well-sorted fine- to medium-grained sand with light brown to tan color. Minor lenses of clayey silt and silty clay up to 6 inches thick are found within this unit, particularly at approximately 15 feet bgs. This shallow/perched zone is bound by the upper middle lithologic unit (Unit 2). The boundary between the two units is between 38 and 40 feet bgs and Unit 2 ranges in thickness from approximately 8 to 20 feet.

The lithologic composition of this unit is variable, consisting of interlayered clayey sand, sandy silt, sandy clayey silt, and silty clay. Minor amounts of clean fine- to medium-grained sand, clay, and clayey gravel exist throughout Unit 2.

The lower two lithologic units are not considered part of the shallow/perched zone and are not included as part of this Work Plan. Available boring logs and well completion logs are included in Appendix A and subsurface profiles completed by others are included in Appendix B.

2.3 Site Hydrogeology
The Site is located within the Santa Maria River Valley Groundwater Basin (CA Department of Water Resources [DWR], 2004), which generally contains unconsolidated gravel, sand, silt, and clay in undifferentiated alluvial, river channel, and dune sand deposits. Groundwater is found in at least two distinct saturated zones: a perched water-bearing zone (shallow water-bearing zone), with groundwater present from approximately 10 feet bgs to an aquitard located at approximately 40 to 50 feet bgs and a deeper, regional water-bearing zone (deep water-bearing zone) at approximately 210 feet bgs. Groundwater flow beneath the Site is assumed to be to the south in the deep zone based on reported groundwater elevations in nearby water supply wells. The deep water-bearing zone groundwater underlying the Site is of beneficial use/suitable for agricultural water supply, municipal and domestic water supply, and industrial use by the CCRWQCB (CCRWQCB, SWRCB, and CalEPA, 2019).

During groundwater investigations at the Site, multiple onsite groundwater monitoring wells were installed (Figure 2). Between 1987 and present, first encountered groundwater in the onsite perched/shallow zone was observed between 7 and 35 feet bgs and first encountered groundwater in the deep groundwaterbearing zone was observed between 127 and 190 feet bgs. Groundwater is encountered inconsistently in the perched/shallow zone, with several wells encountering dry conditions across the various monitoring events. During the most-recent monitoring event in 2021, shallow groundwater was observed at variable depths between 10 and 34 feet bgs. A summary of onsite well construction details and historical Attachment B
Work Plan For Onsite Soil Vapor Extraction
2936 Industrial Parkway, Santa Maria
Santa Barbara County, California
(Global ID No. SLT3S0301290)
22 September 2025
781016901

Page 5 ends

groundwater elevations for shallow/perched zone monitoring wells relevant to this workplan are provided in Tables 1 and 2.

2.4 Prior Site Investigations and Remediation
Various historical investigations and remediation activities have occurred at the Site between approximately 1985 and present following TCE being found in former municipal supply well 2AS. A groundwater extraction and treatment system was installed onsite in 1992. The treatment system was briefly operational in 1992, and then was offline from 1992 to approximately 1994, before operating again until 2000. Five groundwater extraction wells were connected to the groundwater treatment system. The extraction wells pumped water into a 500-gallon transfer tank and then to a treatment system that of consisted of two or three Carbtrol® granular activated carbon (GAC) absorption canisters in series. Following treatment, the extracted water was either used for irrigation on the western side of the SEMCO building or was reinjected into the subsurface (Tetra Tech, 2000). The extraction wells are shown on Figure 2.

Historical sampling locations are shown on Figures 3 through 5 and historical analytical data are included as Tables C1 through C4 in Appendix C. Pre-2003 sampling activities included soil sampling between 1988 and 1991, soil vapor sampling in 1989, and groundwater monitoring between 1990 and 2003. Sixteen (16) groundwater monitoring wells were installed in the shallow/perched groundwater zone and five monitoring wells2 were installed in the deep aquifer (well completion depths of approximately 199 to 207 feet bgs). One of the deep aquifer wells (DMW-1) was abandoned prior to 2003 and construction records are not available for well DMW-5. Available well completion and boring logs are provided in Appendix A.

2.5 Recent Sampling Results
Recent soil, soil vapor and indoor air sampling was conducted in 2021 and 2022 and is described below.

Groundwater sampling results from 1988 to 2021 for VOCs and 1,4-dioxane are summarized on Figure 3 and in Table C-1.

2.5.1 Soil
In 2022, soil within the shallow zone was sampled between 5 and 50 feet bgs onsite (Figure 4).

Concentrations of COCs, particularly TCE, generally increase with depth to approximately 40 feet bgs where the lithology transitions from predominantly sand to silt.Concentrations of TCE then generally decrease from 40 to 50 feet bgs within the silty soils. Increased concentrations of TCE at soil boring B221, near the 2 A fifth deep aquifer monitoring well was identified during the 2021 monitoring well investigation but was not identified in other Site documents reviewed by Langan. This well is noted as "DMW-5" in Table 1.

Attachment B
Work Plan For Onsite Soil Vapor Extraction
2936 Industrial Parkway, Santa Maria
Santa Barbara County, California
(Global ID No. SLT3S0301290)
22 September 2025
781016901

Page 6 ends

presumed source area, were also detected around 15 to 20 feet bgs, where a higher fines and clay content than surrounding soil was observed (ACG, 2022b). Therefore, TCE likely sorbed to the clayey and silty layers in the shallow zone and may still be present, at decreased concentrations.

2.5.2 Soil Vapor
A round of shallow soil vapor samples was collected in 2021 in and around the presumed source area near B221 from depths ranging from sub-slab to 5 feet bgs. In general, concentrations of soil vapor are highest within the presumed source area and decrease radially outwards (Figure 5). Concentrations decrease rapidly to the east and south and appear to extend laterally to the north and west towards SV17 and SV8. The highest TCE and cis-1,2-DCE concentrations were detected at SV15 at 1,000,000 µg/m3and 4,000,000 µg/m3, respectively. SV15 is located near the maximum TCE concentrations in soil (B221) and perched groundwater (MW-10). The target treatment zone is based on the 2021 soil vapor TCE concentrations detected above 3,000 µg/m3as shown in Figure 5.

2.5.3 Indoor Air
Two rounds of indoor air samples were collected in 2021 and 2022 within the former SEMCO building and nearby storage building (ACG, 2021b; ACG, 2022a). Samples were collected over a 12-hour period when the buildings were closed and unoccupied. VOCs were not detected above applicable RWQCB commercial/industrial environmental screening levels3in indoor air samples. Based on these results, soil vapors from beneath the building slab are not migrating into the onsite buildings at unacceptable levels and there was no observable indoor air concern.

3.0 SVE DESIGN BASIS AND CONSTRUCTION METHODOLOGY
This section provides the design basis and construction methodology for onsite SVE implementation.

The basis of design described herein is centered on the currently understood Site conditions as described in Section 2.0 and may be adjusted, as needed, during implementation. Per the Settlement Agreement Exhibit A, the system permitting, installation, startup and startup reporting will be completed within 350 days of the effective date of the Settlement Agreement4.

3.1 SVE Design
Onsite SVE implementation is intended to include an SVE system with vapor treatment and capacity to manage extracted moisture. The target treatment zone (Figure 6) encompasses the observed extent of TCE 3 https://www.waterboards.ca.gov/sanfranciscobay/water_issues/programs/ESL/ESL_Summary_Tables_Rev3.pdf 4 Subject to extension if air permit is not issued within 180 of application submittal.

Attachment B
Work Plan For Onsite Soil Vapor Extraction
2936 Industrial Parkway, Santa Maria
Santa Barbara County, California
(Global ID No. SLT3S0301290)
22 September 2025
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Page 7 ends

in soil vapor above the vapor intrusion risk management range of 1 x 10-5(3,000 µg/m3 TCE) based on the 2021 onsite soil vapor sampling results (Figure 5). The target treatment zone extends laterally approximately 140 feet north and northwest, 65 feet southwest, and 30 feet southeast from sample location SV15, which had the highest reported TCE concentrations in soil vapor in 2021. The target treatment area is approximately 17,000 square feet. Based on the known Site conditions (Appendices A through C), the vertical target treatment zone is “in the shallow zone (to the low permeability layer at the bottom of the perched zone at approximately 50-foot bgs” and is predominantly sand. This vertical target treatment interval is from the ground surface to the first observed clay interval, up to 50 feet bgs. Therefore, the target treatment zone is approximately 850,000 cubic feet.

3.1.1 Pore Volume Exchange Assessment
The remedial effectiveness of an SVE system is generally dependent upon the number of pore volume exchanges that can be achieved within the target treatment zone. Consistent with United States Army Corps of Engineers (USACE) and United States Environmental Protection Agency (USEPA) guidance, the design has been developed based on a target of at least 1,500 pore volume exchanges per year within the target treatment zone considering the site-specific lithology and COCs. The overlapping radius of capture for the SVE wells closest to the source area will likely result in up to 2,500 pore volume exchanges per year.

Considering the higher sand content within the target treatment zone, a lower number of pore volume exchanges is anticipated to effectively treat the impacted vadose zone soils than would be required for material with a higher clay content. Sand also increases the potential for mass transfer and does not adsorb contaminants like clays, thus, lowering the potentialfor back diffusion. TCE, the primary COC, is a volatile and readily stripped compound and as such, is expected to be readily removed by SVE.

3.1.2 SVE Radius of Capture
The radius of capture for SVE well spacing is based on vacuum influence, pore volume exchanges and establishing a critical pore velocity. The following criteria were considered to determine the design spacing for the SVE wells:
• Based on the Site lithology (sands with some silts) and the contaminant of concern (i.e., TCE is volatile), the number of pore volume exchanges within the target treatment zone was selected to be at least 1,500 pore volume exchanges.
• Balance between the number of wells and the total air extraction flow rate and vacuum capacity of the system. The radius of capture of each well can be increased with an increase in the air extraction flow rate, which may potentially reduce the number of wells required, though may require larger vacuum capacity.

Attachment B
Work Plan For Onsite Soil Vapor Extraction
2936 Industrial Parkway, Santa Maria
Santa Barbara County, California
(Global ID No. SLT3S0301290)
22 September 2025
781016901

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• In general, design calculations estimate the influence of one extraction well. It is a known phenomenon that the estimated vacuum influence and pore volume exchanges will be enhanced when multiple wells are operating concurrently within the treatment zone.

The SVE radius of capture was calculated to be 28 feet based on Site-specific information including a porosity of 0.3 based on sands and silty sands, a screen length of up to 50 feet, an air extraction flow rate of approximately 120 cubic feet per minute (cfm) per extraction well, and the target design number of at least 1,500 pore volume exchanges per year (Fetter, 2014).This radius of capture and air extraction flow rate results in approximately 1,800 pore volume exchanges per year per extraction well (Figure 6). At these extraction rates and radius of capture, the volumetric pore gas velocity is approximately 0.03 centimeters per second (cm/s) which is above the critical pore gas velocity of 0.001 cm/s (USACE, 2002; USEPA, 2001; Dixon and Nichols, 2006).

3.1.2.1 Mafi Trench Pilot Test
Padre Associates, Inc. (Padre) completed a pilot study for dual-phase extraction (DPE) wells in May and June 2024 at the Mafi Trench site at 3037 Industrial Parkway (Figure 1), located approximately 900 feet southwest from the onsite area of SVE implementation. As described in Padre’s Interim Remedial Action Report, High-Vacuum Dual Phase Extraction Pilot Test, California (Global ID No. SLT3S0301290), the geology and hydrogeology at 3037 Industrial Parkway is similar to Site conditions (Sections 2.2 and 2.3; Padre, 2024).

The Mafi Trench pilot study estimated a radius of influence (ROI), using a minimum vacuum of 0.1 inches of water (0.007 inches of mercury [inHg]), ranging from 67.5 feet to 107 feet based on vacuum levels of between 19 inHg and 22 inHg and flow rates of between 12 cfm and 43 cfm at three extraction wells.

The Mafi Trench DPE pilot tests may provide information on the air flow dynamics and gas-phase transport properties of the subsurface, which are useful for evaluating the potential for SVE to achieve mass removal through multi-pore-volume flushing. While the ROI is commonly reported to characterize vacuum propagation, the pilot testing provides useful design parameters for estimating cleanup effectiveness based on the flow rate achieved under vacuum and the observed vacuum response at known distances, which enable estimating soil gas pore velocities.

For example, at Mafi Trench well B-11, an average vapor flow rate of 43 cfm was achieved at 19.5 inHg vacuum, with detectable vacuum influence ( ≥ 0.1 inches of water) extending at least 25 feet radially, and still measurable, though below threshold, out to 130 feet. Based on a uniform circular area of influence within a 25-foot radius, the extracted gas volume corresponds to a volumetric pore gas velocity on the order of approximately 0.02 cm/s, which is above the critical pore gas velocity of 0.001 cm/s (USACE, 2002; USEPA, Attachment B
Work Plan For Onsite Soil Vapor Extraction
2936 Industrial Parkway, Santa Maria
Santa Barbara County, California
(Global ID No. SLT3S0301290)
22 September 2025
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2001; Dixon and Nichols, 2006). Even in wells with lower flow rates, such as B-10 (12 cfm at 21 inHg), measurable vacuum response within 23 feet indicates soil vapor can be transported over a broad area.

These measured flow rates and pressure gradients indicate that under continuous SVE operation, the system can capture the target pore volumes.

For the SEMCO Site, which has similar lithology and target contaminants, this indicates that the SVE as designed has sufficient well density under the appropriate applied vacuum andhas the potential to flushmore than 1,000 pore volumes in one year.

3.1.3 SVE Layout
Based on the estimated effective capture radius of 28 feet for each SVE well, eight SVE wells will be operated within the target treatment zone spaced approximately 56 feet apart as shown on Figure 6 and as described in Section 3.3. The new SVE wells will be screened up to 50 feet bgs based on observed site lithology.

For SVE wells located outdoors, aboveground piping will connect each wellhead to the SVE control panel and GAC off-gas treatment system; wells located within the adjacent building will have sub-slab conveyance piping (Section 3.4).

Each wellhead will have a valve which allows the extraction well flow rate to be adjusted. The blower will be adequately sized to allow for up to 1,000 cfm with capacity up to 20 inHg. Extracted soil vapor will be treated through GAC vessels prior to discharge to the atmosphere in accordance with Santa Barbara County Air Pollution Control District (Air District) requirements. A knockout tank will collect extracted moisture/groundwater, as needed, and connect to a storage tank and potential treatment system prior to either discharge to the sanitary sewer system in accordance with applicable City of Santa Maria wastewater discharge permit requirements, or transport offsite by a vacuum truck for proper disposal. The knockout tank will have a water level sensor to shut down the SVE system in the event the storage tank and knockout tank reach capacity during operation.

3.2 Pre-Implementation Activities

3.2.1 Site-Specific Health and Safety Plan
Langan will prepare a site-specific health and safety plan (HASP) for the planned field activities. The HASP will include procedures, equipment, and materials/supplies to be used to protect workers and tenant health and safety during planned SVE implementation and monitoring activities. The HASP will meet or exceed the requirements set by OSHA’s Occupational Health and Safety Standards CFR 29, subpart 1910.120(b)(4).

Attachment B
Work Plan For Onsite Soil Vapor Extraction
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3.2.2 Access and Permitting
Access agreements will be required with the current Site owners prior to proceeding with SVE system construction. It is also anticipated that the following permits will be required for SVE implementation and testing:
• Well construction permits from the Santa Barbara County Public Health Department, Environmental Health Services (EHS) for the planned SVE wells;
• Permit(s) from the Air District for SVE implementation (Form-07B and/or Form -77); and • Industrial wastewater discharge permit from the City of Santa Maria to discharge the groundwater extracted (and treated if necessary) to the sewer during SVE operation.

Per the Settlement Agreement Exhibit A, the air permit application will be submitted within 90 days of the effective date of the Settlement Agreement.

3.2.3 Survey and Utility Clearance
The proposed boring locations for the SVE wells will be delineated with white paint, and Underground Service Alert (USA) will be contacted at least 48 hours prior to the commencement of well installation activities.

Langan will alsosubcontract a private utility locator to evaluate the proposed boring locations for the presence of underground utilities. Additionally, the well locations will be cleared using soft-digging techniques to at least 5 feet bgs prior to drilling.

3.2.4 Agency Notification
Langan will notify the CCRWQCB at least five days prior to initiating field activities. Langan will notify the Air District andCity of Santa Maria in accordance with theirrespective requirements / permit conditions.

3.3 Well Construction Methodology

3.3.1 SVE Well Construction
Langan will observe and document the construction of the SVE wells. Each boring will be advanced using hand auger/tools and hollow-stem auger drilling techniques. Borings will first be cleared to approximate depths of 5 feet bgs using hand auger/tools and will be advanced to final depths of up to 50 feet bgs using the hollow-stem auger drilling rig operated by a C-57 licensed drilling contractor. The soil borings will be visually logged by Langan personnel in general accordance with the Unified Soil Classification System (USCS), working under the supervision of a California licensed professional geologist, and will note first encountered Attachment B
Work Plan For Onsite Soil Vapor Extraction
2936 Industrial Parkway, Santa Maria
Santa Barbara County, California
(Global ID No. SLT3S0301290)
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groundwater, if observed. Soil will be field screened for organic vapors using a photoionization detector (PID) and examined for visual staining and odors.

The SVE wells will be constructed using 4-inch diameter, schedule 40 polyvinyl chloride (PVC) casing.

The wells will be screened up to 50 feet bgs using 0.010-inch factory slotted screen casing in general accordance with USEPA (USEPA, 2017) and California Well Standards (California DWR Bulletins 74-81 and 74-90) guidance. Blank casing will be used to complete the well from the top of the screened interval to grade. The boring annulus will be backfilled with #2/12 filter pack sand from the bottom of the boring to approximately 1 foot above the screened portion. A one- to two-foot-thick hydrated bentonite-chip seal will be placed above the filter pack sand followed by at least a one-foot- thick cement seal to the ground surface.

Each well will be completed with a locking expansion cap and a flush-mounted, traffic-rated well box set in concrete. Permanent construction techniques, including use of neat-cement grout and well box installation will be implemented in accordance with the Advisory for Active Soil Gas Investigations (CalEPA, 2015). Well construction records (California DWR Form 188) will be submitted to the DWR in accordance with applicable permit requirements. Depth to groundwater, if present, will be recorded once the well has stabilized.

Associated SVE wellheads, including a sampling probe to allow for influent and groundwater sampling, will be installed as part of SVE implementation and will connect to the main SVE system header. A typical well construction diagram is included as Figure 7 and well construction details are included as Table 3.

3.3.2 Well Box Installation at Existing Soil Vapor Monitoring Probes The existing soil vapor probes installed by ACG as part of the 2021 soil vapor sampling were not observed to have well boxes. Therefore, well boxes will be installed at the following six existing soil vapor probes proposed for monitoring required by the Settlement Agreement:
• SV8
• SV11
• SV12
• SV15
• SV16
• SV17
If existing vapor probes are damaged or not usable, reinstallation of soil vapor probes will be documented in the Construction Completion Report (Section 4.1.3) and will proceed in general accordance with the soil gas probe construction approach outlined in the Site Assessment Workplan for Monitoring Well Evaluation, Soil Vapor Sampling, and Indoor Air Sampling (ACG, 2021a).

Attachment B
Work Plan For Onsite Soil Vapor Extraction
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Santa Barbara County, California
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3.4 SVE System Equipment
The full-scale SVE system is anticipated to include the following equipment, or equivalent:
• vapor extraction equipment, including:
o a blower capable of providing up to 20 inHg vacuum at the inlet and 1,000 cfm total air flow rate; o vapor-liquid separator knockout tank;
o transfer pump, and
o associated dilution filter, instrumentation, and valving5; • vapor treatment equipment, including two vapor-phase granular activated carbon (VGAC) vessels connected in series; and
• up to a 2,000-gallon holding tank for temporary storage of extracted moisture/groundwater.

The SVE system is anticipated to be stored in the back lot behind the main building in a fenced area. Additional description of the SVE system equipment is provided in the following sections.

3.4.1 Vapor Extraction and Treatment Equipment
The vapor extraction and treatment equipment is anticipated to be housed in either a trailer or shipping container and include an adequately sizedvapor extraction systemwith the required power service. Wellhead connections, including vacuum gauges and well caps with test ports for collection of vapor samples and a ball valve, will be installed on each of the extraction wells. Wellhead connections will also include an opening and seal for the placement of down-well equipment for groundwater gauging and sampling, if needed6.

Vacuum gauges and well caps will also be installed on observation wells for vacuum measurements. The wellheads will be connected to a main SVE system influent line (main header) prior to treatment. Vapor lines from all wells will manifold to a main header pipe that leads to the inlet of the proposed process equipment.

The wells will manifold above grade to the main header pipe via individual well lines. Monitoring equipment alongthe individual branches and/or main header lines will include flow meters, vacuum gauges, temperature sensors, sampling ports, and flow-control valves, as needed. The knock-out tank will separate moisture/groundwater which may be extracted as part of SVE system operation and pump it to the liquid holding tank. Extracted vapor will be treated using at least two adequately sized VGAC vessels, placed in 5 Valving will include at minimum, a valve at every wellhead to allow for adjustments to the flow rate for each well. 6 While not anticipated, wellhead connections will allow for installing submersible pumps for additional groundwater extraction.

Attachment B
Work Plan For Onsite Soil Vapor Extraction
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series, to accommodate a maximum flow of 1,000 cfm prior to discharge to the atmosphere in accordance with Air District permit requirements.

3.5 Air Emissions Controls
Extracted vapors will be treated through VGAC filters to reduce the COCs and meet the requirements of the Air District permit. Sampling will be conducted on a regular basis from influent and effluent sampling ports to determine mass removal and emissions quantities in accordance with applicable permit requirements. If the SVE system vapor treatment does not meet permit requirements, vapor extraction will be temporarily stopped, and the treatment system will be adjusted to meet the permit requirements, as necessary.

Air District permit application forms are included in Appendix D. Preliminary estimated VOC emissions are provided in Table 4.

3.6 Contingencies

3.6.1 Groundwater
Moisture extracted as part of SVE system operation will be separated from the vapor prior to treatment and stored in a holding tank, as needed. The design is predicated on the perched groundwater zone not being temporally continuous based on well gauging information from 2021. Perched groundwater levels may fluctuate significantly with precipitation with increases in the rainy season (approximately October – March) and decreases in the dry season (approximately April – September) and therefore extraction is not intended to occur continuously during SVE implementation. The wellhead connections for the SVE system will also allow for the installation of a submersible pump for groundwater extraction, if needed during periods of groundwater infiltration in the area (e.g., during and following the rainy season). If submersible pumps are used, the extracted groundwater will be treated using bag filters to remove fines, as needed, and liquid phase GAC vessels of adequate capacity placed in series. The existing water treatment system will be visually assessed prior to groundwater treatment and might be retrofitted, if possible and, as needed, to adequately treat the groundwater prior to discharge in accordance with applicable permits. If the existing water treatment system is no longer viable, a new system will be installed.

Treated water will be discharged to the sewer system under an industrial wastewater discharge permit through the City of Santa Maria. Sampling will be conducted from influent and effluent sampling ports per discharge permit requirements. If effluent does not meet permit requirements, discharge will be temporarily stopped and the treatment system will be adjusted to meet permit requirements, as necessary. SVE system operation may continue while the groundwater treatment system is paused pending adequate space in the Attachment B
Work Plan For Onsite Soil Vapor Extraction
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Santa Barbara County, California
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groundwater storage tanks. A permit application for sewer discharge from an industrial facility is included in Appendix D.

3.6.1.1 Baseline Groundwater Sampling
In accordance with the Settlement Agreement and the Offsite and Onsite Groundwater Characterization Work Plan, September 2025, baseline groundwater samples and depth to groundwater measurements will be collected from shallow/perched groundwater monitoring wells (MW-1 through MW-16). The depth to water measurements will be used to verify groundwater presence and quantity and anticipated VOC concentrations requiring treatment. Additionally, as required, a groundwater sample will be analyzed for the constituents outlined in the City of Santa Maria industrial wastewater discharge permit.

3.6.1.2 Extracted Groundwater Influent and Effluent
As needed, groundwater influent (untreated) and effluent (treated) will be analyzed for constituents outlined by the discharge permit requirements and COCs and evaluated to estimate mass removal of the groundwater treatment system. If quantities are low enough, groundwater may be containerized, sampled for waste characterization, and appropriately disposed of instead of treating and discharging to the sewer.

3.6.2 Potential Short Circuiting
Cracked pavement and existing groundwater extraction wells might provide preferential pathways for ambient air to travel into the subsurface and allow short-circuiting, reducing the vacuum for nearby soil vapor extraction wells. While the extraction wells are designed to prevent flow from ambient air from the immediate surrounding area, the radius of capture will extend past the well box and is therefore influenced by existing wells and the surrounding pavement. Startup testing results will be reviewed, and the conditions within the target treatment capture area assessed. If preferential pathways are identified that could allow the extraction wells to pull ambient air and reduce the vacuum in the subsurface, the pavement will be sealed. Existing extraction wells will be fitted with new, locking expansion caps, as needed, based on existing conditions.

3.6.3 Location and Elevation Survey
If groundwater accumulates and must be extracted and treated prior to discharge, the affected wells will be surveyed by a California-licensed Professional Land Surveyor. Vertical and horizontal locations, including sampling ports, outlets, and ground surface elevation, will be measured in accordance with the State of California’s GeoTracker (GeoTracker) requirements. Following completion of installation and surveying, the survey data will be uploaded to the GeoTracker Electronic Submittal of Information (ESI) system.

Attachment B
Work Plan For Onsite Soil Vapor Extraction
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3.6.4 Site Power Supply Evaluation
SVE systems are generally considered energy-intensive and require industrial-level Site power supply. Prior to implementation, the Site power supply will be evaluated to ensure access to an energy system with the capacity to run the system continuously. The Pacific Gas & Electric Company (PG&E) supplies the energy service to Santa Maria and will be contacted, as needed, to confirm the capacity of the current energy system.

Due to the Site location within a heavily industrial area, it is likely that the energy service is within the required range. In the event the power draw is greater than the system’s current capacity, alternative lower-energy systems may need to be considered as a new power supply drop or transformer from PG&E generally has a lead time of over a year.

3.7 System Telemetry Requirements
Wireless telemetry will be used to provide real-time alarms, including blower status, groundwater storage tank level, vacuum levels, and/or pressure sensors on the groundwater treatment system. The use of the remote telemetry will allow for reduced system downtime.

3.8 Waste Management
Spent GAC media will be transported for offsite recycling or disposal at an approved facility. Documentation for the recycling or disposal of the spent GAC media will be provided in the Semi-Annual SVE Progress Report and/or SVE Completion Report, depending on timing.

4.0 SVE OPERATION, MAINTENANCE AND MONITORING

4.1 SVE Startup Testing
The objective of the SVE startup testing is to refine system parameters and optimize effectiveness of the system. The startup testing will be focused to address thearea of highest observed soil vapor concentrations.

Testing for the SVE system will be performed for up to two weeks to refine the system operation as needed.

The SVE system will operate for up to 24 hours a day and be monitored by field technicians from the SVE system manufacturer with oversight from Langan personnel. Startup testing may include field monitoring, performing stepped rate and constant rate vacuum tests, and sampling.

System operating parameters including temperature, vacuum, influent flow (cfm), applied well-head vacuum, and vacuum at observation wells will be recorded at least three times per day during system startup operation. Total VOC concentrations will be measured in the field using a PID.

Attachment B
Work Plan For Onsite Soil Vapor Extraction
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Santa Barbara County, California
(Global ID No. SLT3S0301290)
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Santa Maria City CouncilOctober 21, 2025

Santa Maria City Council
October 21, 2025