Lathrop City Council
April 13, 2026

ITEM 4. 13

CITY MANAGER' SREPORT
APRIL 13, 2026 CITY COUNCIL REGULAR MEETING
ITEM: APPROVE AMENDMENT NO. 1 WITH VEOLIA WATER
WEST OPERATING SERVICES, INC., FOR THE

OPERATION AND MAINTENANCE OF THE LATHROP

CONSOLIDATED TREATMENT FACILITY AND

APPROVE BUDGET AMENDMENT
RECOMMENDATION: Adopt Resolution to Approve Amendment No. 1 with Veolia Water West Operating Services, Inc., for the
Operation and Maintenance of the Lathrop
Consolidated Treatment Facility and Approve Budget
Amendment
SUMMARY:

The Lathrop Consolidated Treatment Facility ( CTF) provides sewer treatment capacity for the Crossroads, Mossdale, River Islands, South Lathrop, Gateway and Central Lathrop Specific Plan development areas. Veolia Water West Operating Services, Inc., (Veolia) provides Operations and Maintenance ( O&M) services based on a 2023 Amended and Restated O&M Agreement. An amendment to this agreement is needed primarily due to changes in operation and maintenance requirements due to Capital Improvement Project ( CIP) WW 22- 38 Phase 3 CTF Expansion and CIP WW 25-6 Phase 4 CTF Expansion.

Staff requests Council approve Amendment No. 1 with Veolia for the CTF O&M services for a cost of $ 174, 219. 45 per month. Sufficient funds were not included in the Fund 6080 ( WW Recycling Plant -# 1 MBR) to cover the increase in cost, and therefore a budget amendment in the amount of $400, 00 is requested for fiscal year FY) 2026/7paid for by revenue generated by rate payers within new development areas.

BACKGROUND:

The CTF provides sewer treatment capacity for the Crossroads, Mossdale, River Islands, South Lathrop, Gateway and Central Lathrop Specific Plan development areas. On March 13, 2023, City Council approved an Amended and Restated Wastewater O&M agreement with Veolia. This agreement replaced the original agreement and amendments between the City and US Filter Operating Services from 2003. The agreement must be amended to expand the scope and monthly service fee to cover new maintenance and operational obligations from facility improvements constructed as a part of CIP WW 22- 38 Phase 3 CTF Expansion and CIP WW 25-6 Phase 4 CTF Expansion.

CITY MANAGER' S REPORT PAGE 2
APRIL 13, 2026 CITY COUNCIL REGULAR MEETING
APPROVE AMENDMENT NO. 1 WITH VEOLIA WATER WEST OPERATING SERVICES, INC., FOR THE OPERATION AND MAINTENANCE OF THE LATHROP

CONSOLIDATED TREATMENT FACILITY AND APPROVE BUDGET AMENDMENT REASON FOR RECOMMENDATION:

Staff requests City Council approve Amendment No. 1 with Veolia for O&M services of the CTF. The amendment ensures that the scope and service fee are adjusted accordingly to cover changes in O&M requirements from the completed improvements constructed with the Phase 3 and Phase 4 Expansions.

FISCAL IMPACT:

The current fees for the Veolia O&M contract are $ 149, 219. 45 per month. The negotiated fee adjustment under the new agreement is $ 174, 219. 45per month. FY 2025/6 budgeted sufficient funds in Fund 6080 ( WW Recycling Plant # 1 MBR) to cover this increase, however sufficient funds were not included for FY 2026/7, therefore staff requests Council approve a budget amendment in the amount of 400, 00 paid for by revenue generated by rate payers within new development areas.

Fiscal Year 2026/7:

Increase Revenue
6080- 5034- 344- 01- 36 $400, 00
Increase Appropriation
6080- 5034- 420- 01- $400, 00
ATTACHMENTS:

A. Adopt Resolution to Approve Amendment No. 1 with Veolia Water West Operating Services, Inc for the Operation and Maintenance of the Lathrop Consolidated Treatment Facility and Approve Budget Amendment B. Amendment No. 1 to the Amended and Restated Wastewater Plant Operation and Maintenance Agreement with Veolia Water West Operating Services, Inc.

CITY MANAGER' SREPORT PAGE 3
APRIL 13, 2026 CITY COUNCIL REGULAR MEETING
APPROVE AMENDMENT NO. 1 WITH VEOLIA WATER WEST OPERATING SERVICES, INC., FOR THE OPERATION AND MAINTENANCE OF THE LATHROP

CONSOLIDATED TREATMENT FACILITY AND APPROVE BUDGET AMENDMENT APPROVALS:

Jonah Sonner Date
Compliance Engineer
1170076
Brad Jxayl or Date
Publi Works Director/ City Engineer
Cari
Financ Di ector
Date
5// 7/ 020. 2
Thomas Hedegard Date
Deputy City Manager
Michael King Date
Assistant City Manager
zzz
Salvador Navarrete Date
City Attorney
Step en J. Salvatore
City Manager
Date
Li-,
RESOLUTION NO. 26 -

A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF LATHROP TO APPROVE AMENDMENT NO. 1 WITH VEOLIA WATER WEST OPERATING SERVICES, INC., FOR OPERATION AND MAINTENANCE OF THE LATHROP

CONSOLIDATED TREATMENT FACILITY AND APPROVE BUDGET AMENDMENT WHEREAS, the Lathrop Consolidated Treatment Facility ( CTF) provides sewer treatment capacity for the Crossroads, Mossdale, River Islands, South Lathrop, Gateway and Central Lathrop Specific Plan development areas; and WHEREAS, Veolia Water West Operating Services, Inc., (Veolia) provides Operations and Maintenance ( O&M) services based on a 2023 Amended and Restated O&M Agreement; and
WHEREAS, an amendment to this agreement is needed primarily due to changes in operation and maintenance requirements due to the Phase 3 CTF Expansion, Capital Improvement Project ( CIP) WW 22- 38 and Phase 4 CTF Expansion, CIP WW 25-6; and
WHEREAS, the current fees for the Veolia O&M contract are $ 149, 219. 45per month, and the negotiated fee adjustment under the new agreement is $ 174, 219. 45 per month; and
WHEREAS, sufficient funds were included in Fund 6080 ( WW Recycling Plant - 1 MBR) to cover this increase in cost for Fiscal Year ( FY) 2025/6; and WHEREAS, sufficient funds were not included in Fund 6080 ( WW Recycling Plant -# 1 MBR) to cover this increase in cost for FY 2026/7, therefore staff requests Council approve a budget amendment in the amount of $400, 00 paid for by revenue generated by rate payers within new development areas.

Fiscal Year 2026/7:

Increase Revenue
6080- 5034- 344- 01- 36 400, 00
Increase Appropriation
6080- 5034- 420- 01- $400, 00
NOW THEREFORE, BE IT RESOLVED, that the City Council of the City of Lathrop does hereby approve Amendment No. 1 with Veolia Water West Operating Services, Inc., for a total cost of $ 174, 219. 45per month to be paid from Fund 6080 WW Recycling Plant -# 1 MBR); and
BE IT FURTHER RESOLVED, that the City Council of the City of Lathrop does hereby approve a budget amendment in the amount of $400, 00 as detailed above.

The foregoing resolution was passed and adopted this 13th day of April 2026, by the following vote of the City Council, to wit:

AYES:

NOES:

ABSENT:

ABSTAIN:

Paul Akinjo, Mayor
ATTEST: APPROVED AS TO FORM:

Teresa Vargas, City Clerk Salvador Navarrete, City Attorney ATTACHMENT " B"
AMENDMENT NO. 1 TO AMENDED AND RESTATED WASTEWATER

PLANT OPERATION AND MAINTENANCE AGREEMENT
This Amendment No. 1 ( this " Amendment") to that certain Amended and Restated Wastewater Plant Operation and Maintenance Agreement is made as of April 13, 2026 by and between Veolia Water West Operating Services, Inc., a Delaware corporation (" VWWOS"), and the City of Lathrop, California, a California municipal corporation (" City" and, together with VWWOS, the " Parties").

RECITALS
WHEREAS, VWWOS and CITY entered into that certain Amended and Restated Wastewater Plant Operation and Maintenance Agreement, dated March 13, 2023 ( the Agreement"), pursuant to which VWWOS agreed to operate and maintain the City' s wastewater
treatment facility ( defined in the Agreement as the " Facility"); and WHEREAS, the City is currently constructing additional treatment assets at the Facility, and the inclusion of such assets to the Facility will affect the scope of the Services performed by VWWOS; and
WHEREAS, this Amendment is now needed to, among other things, modify the scope of Services and the Service Fee contained in the Agreement to accurately reflect work performed by VWWOS after construction of the new assets at the Facility and extend the term of the Agreement;
NOW, THEREFORE, City and VWWOS agree to revise their respective rights and obligations beginning on the effective date of this amendment as follows:

1. Capitalized terms used but not otherwise defined in this Amendment shall have the same meaning given to those terms in the Agreement.

2. Term of Agreement. Section 2. 1 of the Agreement is hereby amended to extend the end of the term of the Agreement from December 31, 2034 to December 31, 2039.

3. Process Control Management Plan. Section 4.3(c) of the Agreement is hereby amended as follows:
c) Process Control Management Plan. Within one hundred eighty ( 180) days of the Effective Date, completion of a significant Facility expansion, or a significant change in the Facility' s process, VWWOS shall provide City a draft Process Control Management Plan ( PCMP) for the portion of the Facility upon which Services shall commence." For the purposes of this section, "significant change in the Facility' s process" shall refer to permanent modifications to the Facility' s process controls required as a result of receipt of Non -Specification Influent.

4. Monitoring and Measuring. Sections 4.(a) of the Agreement is hereby amended by deleting subsections 2. and 3. In their entirety and replacing them with the following:

2. VWWOS shall record all applicable monitoring data in a Water Information Management System ( WIMS) for the Facility established by city, including, but not limited to, field grab samples, visual observations, and laboratory reports prepared by VWWOS or VWWOS- contracted laboratories."

3. VWWOS shall provide City with WIMS data in a tabulated, electronically - searchable format ( e. q., Microsoft Excel) as needed for City to prepare monitoring reports or to advise on treatment performance of the Facility."

5. Preparation of Reports. Section 4. 18 of the Agreement is hereby amended to delete the section in its entirety and be replaced with the following:

Section 4. 18 Preparation of Reports.

The City shall have the sole authority to issue, and shall be solely responsible for issuing and preparing, all reports required under Applicable Law, including the NPDES Permit and WDRs. VWWOS shall provide reasonable assistance to the City with preparation of all reports required under the NPDES Permit and WDRs, which the City will be responsible for preparing and submitting to applicable Governmental Authorities, including inquiries regarding Facility performance.

If City requests that VWWOS prepare any reports, and if such City request causes VWWOS to incur additional costs under this Agreement, City shall reimburse VWWOS therefor as a condition to VWWOS producing such reports. VWWOS shall act consistently with Prudent Industry Practices to ensure the accuracy of such reports, consistent with the requirements of Applicable Law as of the Effective Date, and City shall be responsible for submission of such reports, if applicable."

6. Security. Section 4. 23 of the Agreement is hereby amended to delete the section in its entirety and replace it with the following:

Section 4. 23 Security; Cybersecurity.

Lal VWWOS shall maintain security for the Facility and the Site as specified in Exhibit J. City acknowledges that performance of the foregoing obligations does not constitute a guarantee by VWWOS of the security of the Facility. Provided that VWWOS complies with the provisions of this Section 4. 23, VWWOS shall not have any liability or obligations for Losses related to any theft, vandalism, or unlawful or unauthorized entry upon the Facility or Site although theft vandalism or unlawful or unauthorized entry upon the Facility or the Site shall not alter or diminish VWWOS' sresponsibilities to maintain and repair the Facility pursuant to the terms of Section 4.7, Section 4.8, and Section 4. 9 of this Agreement. City shall not have any liability or obligations to VWWOS Indemnified Parties for Losses related to any theft, vandalism, or unlawful or unauthorized entry upon the Facility or Site.
221 The foregoing notwithstanding, City shall be responsible solely for information technology (" IT") and operational technology (" OT") cvbersecurity of City -owned information systems, networks, and infrastructure that process, store, or transmit Facility data, regardless of location. In no event shall City be responsible or liable for IT or OT cybersecurity of VWWOS- owned assets and technology used at the facility. Within ninety ( 90) days of the Effective Date of this Amendment, the City shall draft a Cybersecurity Plan, in compliance with applicable laws, that describes the processes and procedures that will be followed to ensure the appropriate security of technology resources that are used at the Facility under this Agreement. VWWOS shall agree to or reject the plan within thirty ( 30) days after receipt thereof. If VWWOS rejects the plan, it shall identify the areas of deficiency and such revisions as would make the plan acceptable to VWWOS. If VWWOS fails to respond within such thirty ( 30) day period, City shall implement the plan until such time as VWWOS' scomments are received. If VWWOS agrees to the plan, no further action of City shall be required. If VWWOS requests amendments to it, City shall prepare a revised plan for review by VWWOS under this Section 4. 23( b). City shall submit to VWWOS for review and approval any amendments to the Cybersecurity Plan prior to the date on which such amendments are, or are required by Applicable Law, to be effective.

LcI If City or VWWOS suspects or becomes aware of any unauthorized access to any data by an unauthorized person or third party, or becomes aware of any other security breach relating to data held or stored under this Agreement or in connection with the performance of the Services provided under this Agreement each a " Data Breach"), City or VWWOS, as applicable, shall promptly notify the other party upon becoming aware of such a Data Breach, and VWWOS shall reasonably cooperate with City, and/ or City' s personnel, consultants, and insurance carriers, to prevent or stop such Data Breach. To the extent permitted by law, VWWOS agrees to indemnify, City Indemnified Parties against any and all claims, suits, causes of action, liability, loss, costs and damages, including reasonable attorneys' fees, arising out of or relating to any Data Breach to the extent caused by Veolia' s negligence or willful misconduct or to the extent caused by a Data Breach caused by Veolia- owned IT or OT assets or technology.

Notwithstanding anything to the contrary, if a Data Breach arises out of, results from, or is any way related to an act or omission of the City, its employees, agents, affiliates, representatives, or any third -party hired by the City, the City agrees to reimburse VWWOS for all reasonable costs and expenses, including reasonable attorneys; fees, incurred by VWWOS in responding to, mitigating the effects of, or complying with legal obligations related to such Data Breach. For avoidance of doubt, the occurrence of a Data Breach shall not be construed or constitute as an admission of fault, liability, or wrongdoing by VWWOS in its performance of the Services under the Agreement.

7. City Operating Responsibilities. Section 4. 28( f) of the Agreement is hereby amended to delete subsection ( 1) in its entirety and replace it as set forth below and add a new subsection 7, as follows ( with subsections 2 through 6 to remain unchanged):

1. " Operating and maintaining the entire recycled water system, including operation and maintenance of PMP- 1 (also known as the S- 5 Pump Station), the River Discharge Pump Station, the Cooling Pond ( formally Pond A), and Recycled Water Ponds B and S- 5; provided that VWWOS will coordinate with the City as needed on the operation of PMP- 1 (S- 5 Pump Stationand River Discharge Pump Station;

7. WIMS operations and maintenance."

8. Payments. Section 7.2(a) of the Agreement is hereby amended to change the reference to Section 7.3(b) to Section 7.3(a).

9. Pass -Through Expenses. Section 7.8(b) of the Agreement is hereby amended to correct a scrivener' s error in the Agreement and change " Sodium Biosulfate" to state " Sodium Bisulfite".

10. Confidential Information. Article 9 is hereby amended to insert a new Section 9. 6 as follows and to renumber the existing Sections 9. 6 and 9. 7 to Sections 9. 7 and 9.8, respectively:

Section 9. 6 Background Assets and Intellectual Property. Unless otherwise agreed, the City and VWWOS represent, warrant, and agree that each Party will retain all rights, ownership, title, and interest in and to their respective assets and Intellectual Property existing prior to, incorporated into, or developed independently from (" Background Assets and Intellectual Property") the Services performed by VVWVOS under this Agreement. Nothing under the Agreement shall be construed as granting, transferring, assigning, or implying any right or interest in the other Party' s Background Assets and Intellectual Property, whether expressly or by implication. In no event will either Party' s Background Assets and Intellectual Property be transferred, owned, licensed, sublicensed, exploited, or delivered to the other Party upon the expiration of termination of the Agreement. Each Party shall take reasonable steps to protect and preserve the other Party' s Intellectual Property rights consistent with this Section 9. 6 by providing prompt notice to the other Party of any known or suspected infringement or misappropriation of such rights."

11. City Remedies for VWWOS Event of Default. Section 14. 4(g) is hereby amended by deleting that subsection in its entirety and replacing with the following:
q) Intellectual Property. Unless otherwise agreed by the Parties, VWWOS shall grant to City an revocable, United States -only, non- exclusive, non- sublicensable, nontransferrable, royalty -free limited license to access and use VWWOS Background Assets and Intellectual Property only to the extent expressly granted by VVWVOS to maintain and operate the facility for the remainder of the Term herein. Such license may be accessed or used by City or City employees solely for the maintenance and operation of the Facility, provided that such license shall be used for no other purpose except with respect to the City' s Facility. At all times VWWOS' s Background Assets and Intellectual Property accessed and used at the Facility shall be treated as Confidential Information subject to the limitations under Article 9 of this Agreement, and City shall remain responsible and ensure that any person or entity to whom City delegates such license complies with all terms and conditions herein."

12. Construction and Testing. Exhibit N, attached to this Amendment, is hereby added to the Agreement as Exhibit N. Upon completion of the construction and upgrades to the Facility outlined in such Exhibit N, and completion of the Startup Plan outlined in such Exhibit N collectively, the " Construction and Testing"), VWWOS will provide notice to the City of the completion of the Construction and Testing. Upon the City' s receipt of such notice, the following amendments to the Agreement will take place:

Scope of Services. The assets constructed and upgraded as set forth in Exhibit N will be deemed to be part of the Facility.

ILI Exhibit B. Exhibit B to the Agreement will be amended with Exhibit B- 1, attached to this Amendment.

Exhibit I. Exhibit I to the Agreement will be deleted and replaced with Exhibit I1, attached to this Amendment; Exhibit K. Exhibit K to the Agreement will be amended with Exhibit K- 1, attached to this Amendment.

13. This Amendment sets forth the entire agreement between the Parties with respect to the matters set forth herein. There have been no additional oral or written representations or agreements. Except as expressly modified or amended herein, all the terms and conditions set forth in the Agreement remain unchanged, in full force and effect, and are incorporated by reference. In the event of a conflict between the provisions of the Agreement and this Amendment, the provisions of this Amendment shall govern and control.

14. This Amendment may be executed in multiple counterparts, each of which is deemed an original but together constitute one and the same instrument, and a signature delivered by facsimile, email, or other means of electronic transmission is deemed to have the same legal effect as delivery of an original signature. The individuals executing this Amendment represent and warrant that they have the right, power, legal capacity, and authority to enter into this Amendment on behalf of the respective legal entities of VVWVOS and the City. This Amendment shall inure to the benefit of and be binding upon the Parties hereto and their respective successors and assigns.

Signature Page Follows]
IN WITNESS WHEREOF, the Parties have executed and entered into this AMENDMENT NO. 1 as of the date first written above.

CITY OF LATHROP, CALIFORNIA
By:

Name: Stephen J. Salvatore
Title: City Manager
ATTEST:

By:

Name: Teresa Vargas
Title: City Clerk
APPROVED AS TO FORM:

By:

Name: Salvador Navarrete
Title: City Attorney
RECOMMENDED FOR APPROVAL:

By:

Name: Michael King
Title: Assistant City Manager
VEOLIA WATER WEST OPERATING SERVICES, INC.

DocuSigned by:

FA" AwA
By: 30730112C40BD4K..

Name: Aaci tya Raman
Title: President, Municipal water
Exhibit N
PACE Advanced Water Engineering
Technical Memorandum
Date: November 18, 2025
To: Ken Reed, Senior Construction Manager — City of Lathrop From: Andy Komor, MS, PE — PACE; Ashley Green, PhD — PACE Re: V3. 1 Phase III Startup Plan for Bioreactor and Membrane Systems at Lathrop CTF A713 Table of Contents:

Background 1
Stage 0 — Functional Testing 2
Step Oa: Existing Condition 2
Step 0b: Clean Water Testing of Phase III ( start of Dec ' 25) 2 Step 0c: Emptying Phase III of Clean Water ( late Dec ' 25 or early Jan ' 26) 3 Stage 1 — Seeding Phase III with MLSS 5
Step 1 a: Day 1 of Seeding ( late Dec ' 25 or early Jan ' 26) 6 Step lb: Day 2 of Seeding 7
Step 1c: Day 3 of Seeding 8
Step ld: Day 4 of Seeding 9
Step le: Day 5 of Seeding 9
Step 1f: Day 6 of Seeding ( morning) 10
Stage 2 — Phase III Operation and Phase II Repairs 12
Step 2a: Day 6 of Seeding ( afternoon) 12
Step 2c: Days 6 — 90 ( finishing as late as Apr '26) 13 Step 2d: Days 90+ 14
Background
Bioreactors and membranes at the Lathrop Consolidated Treatment Facility (CTF) are undergoing a series of upgrades to improve treatment performance. Phase III construction is nearing completion and includes bioreactors 3 and 4, as well as membranes 6, 7, and 8. Phase IV construction, which includes bioreactors 5 and 6 and membranes 4 and 5, is still in progress.

This startup plan outlines the six -day sequence of activities required to startup and commission the Phase III system, followed by the multi -month process to decommission, repair, and restart the Phase II system.

Discharge specifications for each stage of startup are also provided.

The startup plan ( Stages 0-2) for commissioning the Phase III system is detailed in this document. 17520 Nev. hope Street. Suite 200 Fountain Valley. CA 92708 P.' 714) 481- 7300 F.' 7141481- 7299 www. pacewater. com V3 Phase lII Startup Plan for Bioreactor and Membrane Systems at Lathrop CTF November 18, 2025 City of Lathrop - # A713 Page 2 of 14
Stage 0 — Functional Testing
Prior to seeding the new Phase III system with MLSS- activated sludge, the new bioreactors and membranes need to be tested for functionality.

Step Oa: Existing Condition
In this step, Phase II bioreactors 1 and 2 will be filled with mixed liquor suspended solids ( MLSS) activated sludge, and membranes 1, 2, and 3 will remain operating normally. The equalization pipes between Phases II and I I I will remain closed during this step and bioreactors 3 and 4 and membranes 6, 7, and 8 will be initially empty ( shown in gray in Figure Oa). Phase IV bioreactors 5 and 6 are still under construction.

Figure Oa. Phase I II is empty while Phase II operates normally at Lathrop CTF.

Step Ob: Clean Water Testing of Phase III ( start of Dec ' 25) Phase III will be filled with " clean water", i.e. recycled water, for functional equipment testing ( shown in purple in Figure Ob). Functional testing of Phase III will consist of the following steps:

Running the Phase III systems in HAND and then AUTO with temporary permeate plumbing to return permeate to the Phase III RAS channel.

Closing the permeate header valve between Phases II and III, allowing Phase I I I permeate to be temporarily routed to the Phase I I I RAS channel.

Note: The influent channel and RAS sump from Phases II and III are interconnected, and during the clean water testing and commissioning procedure the valves on the connected pipes will remain closed.

PACE
V3 Phase 111 Startup Plan for Bioreactor and Membrane Systems at Lathrop CTF City of Lathrop - # A713 Page 3 of 14
November 18, 2025
Figure Ob. Phase I I I filled with clean water for functional testing while Phase II operates normally.

Step Oc: Emptying Phase 111 of Clean Water ( late Dec ' 25 or early Jan ' 26) After the completion of Phase I I I functional testing with clean water, the Phase I I I system will be partially emptied once the SCADA system is installed and functional. If the SCADA system is not ready, clean water will continue to be recirculated, and biological seeding will be delayed until ready.

Emptying Phase I I I steps ( once the SCADA system is up):

The dewatering pumps will be run prior to emptying Phase III bioreactors 3 and 4 to avoid flotation or groundwater flowing into the tanks.
50% of the water ( around 8 ft. depth remaining) will be pumped out from bioreactors 3 and 4.

Discharge Specifications: The emptied clean water will be sent to the S5 storage basin to allow these bioreactors to be replenished with MLSS activated sludge obtained from bioreactors 1 and 2.

PACE
V3 Phase Ill Startup Plan for Bioreactor and Membrane Systems at Lathrop CTF City of Lathrop - # A713
November 18, 2025

3 1 . _ _ 4 II I
I i ,-- t--- LFigure Oc. Phase III bioreactors 3 and 4 emptied ( 50% of clean water remaining) following functional testing with clean water and SCADA system installation.

PACE
V3 Phase 111 Startup Plan for Bioreactor and Membrane Systems at Lathrop CTF November 18, 2025 City of Lathrop - # A713 Page 5 of 14
Stage 1 — Seeding Phase III with MLSS
Once Phase III bioreactors 3 and 4 are 50% empty, the seeding process will begin by introducing MLSS activated sludge sourced from Phase II bioreactors 1 and 2.

Inflows are typically 1, 000 gallons per minute ( gpm), so to ensure operational safety, bioreactors 1 and 2 will be pumped at a conservative rate of 200 gpm each. This rate is selected to ensure that both bioreactors 1 and 2 remain full and Phase II continues operating while Phase III is being filled.

To begin seeding:

Automatic DO mode will be enabled for all 4 bioreactors.

Temporary submersible pumps will transfer MLSS from bioreactor 1 to bioreactor 3 and from bioreactor 2 to bioreactor 4 at a slow flowrate, around 75 — 200 gpm.

The transfer of MLSS will be conducted over a period of nine hours daily for six consecutive days, aiming to transfer 50% of the activated sludge from bioreactors 1 and 2 to bioreactors 3 and 4. The total time projected to startup and commission Phase III is six days. Membranes 6, 7, 8 will be turned on once bioreactors 3 and 4 reach 100% capacity.

A detailed, daily, description of each day of MLSS and sewage transfer is provided below. This plan will only describe the transfer from bioreactor 1 to bioreactor 3, which will be the same as the transfer from bioreactor 2 to bioreactor 4.

PACE
V3 Phase III Startup Plan for Bioreactor and Membrane Systems at Lathrop CTF November 18, 2025 City of Lathrop - # A713 Page 6 of 14
Step la: Day 1 of Seeding ( late Dec ' 25 or early Jan ' 26) The MLSS from Phase II bioreactor 1 will be slowly transferred to Phase III bioreactor 3 at a flowrate of 200 gpm for a period of nine hours.

Table 1 a, column 6 shows the microbial population ( bacteria concentration in ppm) for bioreactor 1. Column 2 shows the influent flowrate ( Qinflow in gpm), which indicates the volume of raw sewage entering the treatment facility. The total inflow will be evenly distributed, with 50% directed to bioreactor 1 and 50% to bioreactor 2. Column 3 shows the fraction of inflow directed to bioreactor 1, which initially is 50% and gradually decreases over time, reaching 42% by the end of the first day.

Upon completion of MLSS transfer on Day 1, the sewage transfer process to bioreactor 3 will commence.

As shown in Table 1 a, the inflow percentage to bioreactor 3 ( column 14) increases from 0% to 8% and remains at this level until 3: 00 pm on the second day. It is necessary to ensure that the sewage is transferred immediately following the completion of the MLSS transfer.

By the end of day 1, bioreactor 3 is not at full capacity ( Figure 1 a). The total volume of sewage in the tank starts at 50%, due to 370, 00 gallons ( column 16) of clean water remaining after the completion of Phase III functional testing, and ends at 73% on Day 1, as indicated in column 18.

In this early stage of transferring, MLSS from bioreactor 3 ( column 17) appears low because the seed sludge is diluted. Over the following days, as organic load is introduced, MLSS is expected to rise gradually due to bacterial growth.

Table 1a. Day 1 of MLSS and sewage transfer.
2 3
Q inflow Bio1
18Pm) %
4 0:0 1000 50 5,
1: 00 500 50 25
2: 08 5S0 50 2';
3: 00 900 50 43:._
4: 00 400 50 2')`.:
5: 00 SOO 50 25(!
6: 00 600 50 3ili,
7: DO 700 42 294
8: 00 900 42 3Te
9: 00 800 42 336
10: 00 1600 42 672
11: 00 1400 42 54,
12: 00 1600 42
13: 00 1200 42 57- i
14: 00 1500 42 63C
15: 00 1200 42 5J4
16: 00 1100 42 46
17: 00 700 42 294
18: 00 1500 42 63C
19: 00 1700 42 71:
20: 00 1500 42 63
21: 80 1700 42 714
22: 00 1700 42 714
23: 00 1600 42 6%
24' 00:0 1100 42
5 6 7
Blo 1
vol gal
740, 00
740. 00 8. 512 52,35
740. 00 8. 525 52, 612
740. 00 8. 537 52, 688
740. 00 8. 550 52. 765
740, 00 8. 562 52. 842
740, 00 8. 575 52, 919
740. 00 8. 587 52. 996
740, 00 8. 600 53. 074
740000 8, 472 52, 289
740. 00 8347 51.15
740. 00 8. 224 50, 753
740. 00 8, 102 50. 002
740, 00 7. 982 49. 263
740. 000 7. 864 48, 534
740000 7.48 47. 816
740, 00 7, 633 47, 109
740. 00 7. 520 46.12
740000 7. 531 46.80
740. 00 7. 542 46, 548
740. 00 7, 553 46, 615
740. 00 7. 564 46, 683
740. 00 7, 575 46, 752
740. 00 7. 586 46, 820
740, 00 7. 597 46, 888
Bio 1
PP.

BIo1
lbs
52, 459
8 10 11 12 I
13 14 15 16
Q inflow Q inllow
QI to Q3 to Blo 3 to Bio 3 Q3 vol
Igpm1 Ibs out cum lbs % of inflow I gpm) gat)
oK
OK - -
OK -
OK -
OK -
OK
OK -
OK
266 OK 861 861
2W OK 848 1. 711
206 . 3K 836 2, 549
206 , 3t 824 3,77
200 GK 811 4. 193
206 )< 799 4. 998
200 OK 788 5. 793
200. 3K 776 6. 578
200 '; K 764 7. 351
OK 7. 362
OK - 7, 373
OK 7384
OK - 7. 395
OK 7. 405
OK 7. 416
OK 7. 427
OK - 7. 438
17 18
Q3 MLSS Q3 vo1
ppm) % to full
50%
370. 00 - 50%
370. 00 - 504
370000 - 50%
370000 - 50%
370, 00 - 504:
370. 00 505'.
370. 00 50%
382. 000 270 52%
394. 000 521 53%
406, 000 753 55%
418. 000 969 56%
430000 1.69 58%
442. 000 1356 60%
454. 000 1. 530 61%
466. 000 1. 692 63%
8 88 483. 280 1. 824 654
8 56 486. 640 1. 814 66%
8 120 493, 840 1. 790 674
8 136 502, 000 1. 764 68%
8 120 509200 1. 741 694
6 136 517. 360 1. 716 70%
8 136 525.20 1. 692 71%
8 128 533200 1. 670 72%
8 88 538. 40 1. 656 73%
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November 18, 2025
Figure 1a. On Day 1, Phase II bioreactors are seeding Phase III with MLSS activated sludge. Phase III has reached 73% of its total capacity.

Step lb: Day 2 of Seeding
Bioreactor 1 continues to pump MLSS to bioreactor 3 at a rate of 200 gpm for nine hours. This pumping occurs during the day to avoid overnight pumping. Table lb shows that by 5: 00 pm on day 2, Phase III bioreactors will reach 100% of their capacity ( column 18) and at this point, membranes 6, 7, and 8 will be turned on and active ( column 19). Phase III RAS pumps will also be manually turned on.

On day 2, the percentage of inflow sewage decreases from 42% to 34% ( column 3) and sewage transfer has increased from 8% to 16% ( column 14). The total MLSS concentration at the end of day 2 reaches 2, 325 ppm ( column 17), which is still low but projected to grow over time.

By the end of day 2, Phase 3 bioreactors will be full and in operation (Figure lb).

Discharge Specifications: Phase 3 membrane permeate produced from this day forward ( if turbidity and ammonia compliant), will be chlorinated, dechlorinated, and sent to the San Joaquin River.

If turbidity is non -compliant, permeate is automatically routed to the emergency storage basin.

If ammonia is non -compliant, permeate will be manually routed to the emergency storage basin, and immediate action will be taken to resolve the high ammonia before resuming discharge to the river.

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Table lb. Day 2 of MLSS and sewage transfer.
1 2 4 6 7
Bio1 BIo1 Sol
L,• to) , vat al Ibt
1: 00 500 42 7 740. 000 7. 608 46, 956
2: 00 550 42 740, 00 7. 620 47. 025
3: 00 900 42 740, 00 7, 631 47. 093
4: 00 400 42 740. 00 7, 642 47, 162

5. 00 500 42 740. 00 7, 653 47, 231
6: 00 600 42 740. 00 7, 664 47. 300
7: 00 700 42 740. 00 7. 675 47369
8: 00 900 42 740, 00 7, 686 47438
9: 00 SOO 42 336 740, 000 7, 573 46, 736
10: 00 1600 42 672 740, 000 7. 461 46. 045
1100 1400 42 588 740, 00 7. 040 45. 364
12: 00 1600 42 672 740. 00 7. 242 04. 693
13: 00 1200 42 504 740, 00 7. 135 44, 032
14: 00 1500 42 630 740, 00 7, 029 43. 380
15: 00 1200 42 504 740. 00 6, 925 42. 739
16: 00 1100 34 374 740. 00 6, 823 42. 106
17, 00 700 34 238 740. 00 6. 722 41484
18: 00 1500 34 518 740000 6, 731 41, 544
19: 00 1700 34 578, 740. 00 6741 41, 605
20: 00 1500 34 510 740. 00 6. 751 41. 665
21: 00 1700 34 578 740000 6. 761 41. 726
22: 00 1700 34 578 740. 00 6. 771 41. 787
23: 00 1600 34 544 740. 00 6, 781 41. 848
24: 00:0 1100 34 374 740. 00 6, 791 41. 909
8 9 10 11 12 I
13 14 15 16 I
17 18
Qlnflow QInflow
131 to Q3 to Bio 3 to 810 3 QS vol Q3 MLSS Q3 vol
1gp') Ills out cum W. % of Inflow 1 m) 1 all ( m) % to lull

7. 449 8 40 540. 880 1. 651 73%

7. 459 8 44 543.20 1546 73%

7. 470 8 72 547. 840 1. 635 74%

7. 481 8 32 549. 760 1. 632 74%
7, 492 8 40 552, 160 1. 627 75%
7503 8 48 555. 040 1, 621 75%
7514 8 56 558, 400 1. 613 75%
200 770 8, 295 8 72 574. 720 1. 731 78%
200 758 9. 065 8 64 590.60 1. 801 80%
200 747 9, 826 8 128 610, 240 1. 931 82%
200 736 10. 576 8 112 62& 960 2. 016 85%
200 725 11317 8 128 648.40 2. 092 88%
200 714 12. 048 8 96 666. 400 2. 168 90%
200 704 12, 769 8 120 685.00 2333 93%
200 694 13. 481 8 96 703. 360 2398 95%
200 683 14.84 16 176 725920 2. 343 98%

14. 205 16 112 732. 640 2. 325 99'- Ph1 RAS / MBR ON
0, - 14, 226 16 240 747. 040 2. 305 101%
Ox - 14. 246 16 272 763. 360 2. 308 103%
OK - 14. 267 16 240 777,60 2. 312 105%
OK - 14. 288 16 272 794080 2315 107%
OK - 14309 16 272 810. 40 2. 318 110%
OK - 14330 16 256 825. 760 2. 322 112%
OK - 14. 350 16 176 836. 320 2. 325 113%
S?i'J1• L___ ____ I II
Figure lb. On Day 2, Phase II bioreactors are seeding Phase III with MLSS activated sludge. Phase I I I has reached 100% of its total capacity. Membrane permeate moves forward to disinfection if ammonia and turbidity are compliant based on in -line measurements.

Step lc: Day 3 of Seeding
As shown in table lc, bioreactor 1 continues to pump MLSS to bioreactor 3 at 200 gpm for nine hours column 9). By the end of day 3, 3,71 ppm of MLSS ( column 17) will have been transferred to bioreactor 3, and the percentage of inflow sewage will decrease from 34% to 26% ( column 3). The rate of sewage transfer is expected to rise from 16% to 24% ( column 14).

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Table 1c. Day 3 of MLSS and sewage transfer.
2 3 4 5 6 7 8I 9 10 11 12 I
13 Q inflow Bio1 Blot No No
l: •to) % sot • m lbs
1: 00 500 34 170 740. 00 6. 801 41. 970
2: 00 550 34 13' 740. 00 6. 810 42, 031
3: 00 900 34 740. 00 6. 820 42. 093
4: 00 400 34 . ;-. 740. 00 6. 830 42, 154
5: 00 500 34 170 740. 00 6. 840 42, 215
6: 00 600 34 204 740. 00 6. 850 42277
7, 00 700 26 740. 00 6, 860 42. 339
8: 00 900 26 _ 740. 00 6, 759 41, 712
9: 00 800 26 209. 740. 00 6.59 41. 095
10: 00 1600 26 416 740. 00 6. 560 40,87
1100 1400 26 364 740. 00 6. 463 39. 889
12: 00 1600 26 416 740, 00 6, 368 39. 299
13: 00 1200 26 312 740, 00 6273 38, 717
14: 00 1500 26 390 710, 00 6. 181 38. 145
15: 00 1200 26 312 740, 00 6. 089 37, 580
16: 00 1100 26 286 740, 00 5, 999 37, 024
17: 00 700 26 182 740, 00 6, 008 37. 078
18: 00 1500 26 390 740, 00 6, 017 37. 132
19, 00 1700 26 442 740, 00 6, 025 37. 187
20: 00 1500 26 390 740, 00 6. 034 37. 241

21. 00 1700 26 442 740. 00 6. 043 37, 295

22. 00 1700 26 442 740, 00 6. 052 37.50
23: 00 1600 26 416 740, 00 6. 061 37. 404
24: 00:0 1100 26 740. 00 6. 070 37. 459
14 15 16 I
17 18
Q Inflow Q inflow
Q1 to Q3 to Ito 3 to Blo 3 Q3 val Q3 MISS
lop.) lbs out cum Ws % of inflow ( gpm) ( gat Ippm)
aK - 14. 371 16 80 841, 120 2, 329
D - 14. 392 16 88 846. 400 2, 332
OK - 14, 413 16 144 855, 040 2, 335
OK - 14. 434 16 64 858.0 2, 339
OK - 14. 455 16 80 863. 680 2, 342
06 . 14, 477 16 96 869. 440 2, 346
200 Y0 687 15.85 16 112 888, 160 2. 460
200 41 677 15. 884 16 144 908. 800 2, 574
200 7K 667 16. 574 16 128 928, 40 2, 685
200 . 0 657 17. 255 16 256 955. 840 2, 796
200 J< 647 17. 927 16 224 981. 280 2, 905
200 : K 638 18, 591 16 256 1. 008, 640 3, 012
200 =, 0 628 19. 246 16 192 1. 032. 160 3, 119
200 -,< 619 ' 19 19. 893 16 240 1. 058, 5660 3223
200 OK 610 20. 532 24 288 1. 087, 840 3.27
OK 20. 562 24 264 1,03, 680 3.32
OK 20. 592 24 168 1.13, 760 3.37
OK 20, 622 24 360 1.35, 360 3.41
OK - 20, 652 24 406 1.59. 840 3,46
OK 20, 682 24 360 1.81. 440 3.51
OK - 20. 713 24 408 1. 205. 920 3.56
OK - 20. 743 24 408 1. 230. 400 3.61
OK - 20. 773 24 384 1. 253. 440 3.66
OK 20. 803 24 264 1. 269.80 3,71
Q3 vol
to fuU
114%
1145E
116%
116%
117µ
117%
120%
123%
125%
129%
133%
136%
139%

14. 3%
147E
149%
151%
153%
157%
160%
163'.
1665'.
169%
172%
Step 1 d: Day 4 of Seeding
As shown in table 1d, bioreactor 1 continues to pump MLSS to bioreactor 3, but now at a reduced flow of 150 gpm for nine hours ( column 9). This flow adjustment was made due to a lower total inflow, which on this day is expected to be between 26% and 18% ( column 3). The rate of sewage transfer is expected to rise from 24% to 32% ( column 14).
1 2
Q inflow Bio 1
gpm) %
0:0 1000 26
1: 00 500 26
2: 00 550 26
3: 00 900 26
4: 00 400 26
5: 00 500 26
6: 00 600 26
7: 00 700 26
8: 00 900 26
9: 00 800 26
10: 00 1600 26
11: 00 1400 26
12'. 00 1600 26
13: 00 1200 26
14: 00 1500 26
15: 00 1200 26
16: 00 1100 26
17: 00 700 18
18: 00 1500 18
19: 00 1700 18
20: 00 1510 18
21: 00 1700 18
22: 00 1700 18
23: 00 1600 18
24: 00:0 1100 18
13 234
1 15
203.
41:
286
27:
5003
300
205
19'
Bio 1
vol gal
740. 00
740. 00
740, 00 6. 070 37. 459
740. 00 6. 078 37, 513
740. 00 6. 087 37, 568
740. 00 6. 096 37. 623
740. 00 6. 105 37, 678
740, 00 6, 114 37, 733
740. 00 6. 123 37. 788
740. 00 6. 057 37.82
740. 00 5. 992 36. 981
740. 00 5. 928 36. 584
740. 00 5. 864 36. 192
740, 00 5. 801 35. 803
740. 00 5. 739 35. 419
740. 00 5. 677 35, 039
740. 00 5. 617 34, 663
740. 00 5,56 34. 291
740. 00 5.64 34.41
740. 00 5.73 34,91
740. 00 5.81 34. 442
740. 00 5.89 34, 492
740. 00 5.97 34, 542
740. 00 5. 605 34, 593
740. 00 5. 613 34. 643
Table 1d. Day 4 of MLSS and sewage transfer.

Bio1
ppm
7 I
9 10 11 12 I13 14 15 16
Q Inflow Qinflow
Bio1 Q1toQ3 toBlo3 to )1103 Wool
lbs ( gpm) lbs out cum lbs % oflnflow Igpm) ( golf
OK 20, 803
OK 20. 834
OK - 20864
OK - 20. 894
OK 20. 925
OK 20. 955
150 OK 460 21. 446
150 DC 455 21. 932
150 1< 4. 50 22. 414
150 ' 0 445 22. 892
150 - 3C 440 23. 366
150 .. 436 23, 836
150 iK 431 24. 301
150 OK 426 24. 763
150 7K 422 25221
OK 25258
OK 25,95
OK 25. 332
OK 25, 369
OK 25. 406
OK 25. 443
OK 25, 480
OK 25. 517
I
17 18
Q3 MLSS
PP.)
24 264 1. 269280 3,71
24 216 1282240 3.76
24 96 1, 288, 000 3.81
24 120 1. 295.00 3.86
24 144 1, 303. 840 3.91
24 168 1. 313. 920 3.95
24 216 1. 335. 880 3. 475
24 192 1. 356. 400 3, 554
24 384 1, 388. 440 3. 632
24 336 1. 417. 600 3. 709
24 384 1. 449. 640 3, 786
24 288 1. 475. 920 3. 862
24 360 1. 506.20 3. 938
24 288 1. 532. 800 4. 012
24 264 1, 557. 640 4. 087
32 224 1. 571. 080 4. 093
32 480 1, 599. 880 4. 099
32 544 1. 632. 520 4. 105
32 480 1. 661. 320 4, 111
32 544 1, 693. 960 4, 117
32 544 1, 726. 600 4. 123
32 512 1. 757. 320 4. 129
32 352 1, 778. 440 4. 135
Step 1e: Day 5 of Seeding
As shown in table 1e, bioreactor 1 continues to pump MLSS to bioreactor 3, at a reduced flow of 150 gpm for nine hours ( column 9), due to total inflow to bioreactor 1 declining progressively, from 18% to 10% as PACE
V3 Phase 111 Startup Plan for Bioreactor and Membrane Systems at Lathrop CTF November 18, 2025 City of Lathrop - # A713 Page 10 of 14
indicated in column 3. Meanwhile, the rate of sewage transfer is projected to increase from 32% to 40% column 14).

Table le. Day 5 of MLSS and sewage transfer.
1 2 3 4 5 6 7 9 10 11 12 13 14 15 10 I
17 18
Q Inflow Q inflow
Q inflow Bio 1 Bio 1 No 1 Bic 1 Q1 to Q3 to No 3 to Blo 3 Q3 vol Q3 MLSS i:•m) % vol: al ppm lbs ( gpm) Ibsout cum lbs % ofInflow ( gpm) ( gal) ( p•m) 1: 00 500 18 90 740. 00 5. 621 34, 693 < 25. 554 32 160 1, 788. 040 4, 141 2: 00 550 18 99 740, 00 5, 630 34, 744 JK 25592 32 176 1, 798. 600 4. 147 3: 00 900 18 162 740, 00 5, 638 34, 795 OK - 25, 629 32 288 1, 815880 4, 153 4: 00 400 18 72 740. 00 5. 646 34. 845 OK - 25. 666 32 128 1. 823. 560 4159 5: 00 500 18 90 740. 00 5. 654 34. 896 OK - 25. 704 32 160 1. 833. 160 4, 165 6: 00 600 18 108 740000 5. 663 34947 OK - 25. 741 32 192 1, 844. 680 4. 171 7: 00 700 18 126 740000 5. 671 34. 998 i< - 25. 779 32 224 1, 858120 4, 177 8: 00 900 18 162 740. 00 5. 679 35. 049 150 i< 427 26.43 32 288 1884. 400 4, 252 9: 00 800 18 144 740. 00 5. 618 34. 673 150 \ O 422 26, 703 32 256 1. 908, 760 4. 327 10: 00 1600 18 288 740. 00 5.58 34301 150 i< 417 27. 159 32 512 1948. 480 4.01 11: 00 1400 18 252 740. 00 5. 498 33. 933 150 '< 413 27, 6U 32 448 1, 984. 360 4.74 12: 00 1600 18 289 740. 00 5. 439 33. 569 150 i< 409 29, 061 32 512 2, 024,80 4547 13: 00 1200 18 "' l 740. 00 5, 381 33, 209 150 J< 404 28, 506 32 384 2, 056120 4. 619 14: 00 1500 18 740. 000 5. 323 32, 853 150 ?< 400 28. 947 32 480 2. 093. 920 4. 690 15: 00 1200 18 2E 740. 00 5. 266 32. 500 150 ,< 396 29. 385 32 384 2, 125. 960 4. 761 16: 00 1100 18 198 740. 00 5. 210 32, 151 150 J< 391 29819 32 352 2. 156. 080 4, 832 17: 00 700 10 70 740. 00 5. 154 31806 OK - 29863 40 280 2. 172. 880 4. 839 18: 00 1500 10 150 740. 00 5161 31, 853 OK - 29906 40 600 2.08. 880 4. 846 19: 00 1700 10 IT," 740. 00 5, 169 31899 OK - 29. 950 40 680 2.49. 680 4. 853 20: 00 1500 10 740. 00 5. 176 31, 946 OK _ - 29. 993 40 600 2.85. 680 4860 21: 00 1700 10 740, 000 5, 184 31, 992 OK - 30037 40 680 2. 326. 480 4. 667 22: 00 1700 10 17G 740000 5. 191 32039 OK - 30, 081 40 680 2. 367. 280 4874 23: 00 1600 10 160 740. 00 5. 199 32086 OK - 30, 125 40 640 2. 405. 680 4. 881 24: 00:0 1100 10 110 740. 00 5. 207 32. 132 OK - 30. 169 40 440 2. 432. 080 4. 888 Step 1 f.• Day 6 of Seeding ( morning)
On the final day ( day 6) of the MLSS transfer, bioreactor 1 receives only 10% of the total inflow ( column 3) and the transfer flow from bioreactor 1 to bioreactor 3 is reduced from 150 gpm to 70 gpm. The transfer period will conclude at 3: 00 PM ( light blue in Table 1f), and 50% of the MLSS will have already been sent to bioreactor 3. Figure 1d illustrates the changes in the water volume of bioreactor 3 over the course of this transfer period.

Table lf. Day 6 ( morning, until 3: 00 pm) of MLSS and sewage transfer. 1 2 3 4
Q inflow Bio 1
Rpm) %
5 6 7
B( o1 Bio1 Blo1
vol gal ppm Ibs
740. 00 5. 214 32. 179
740. 00 5, 222 32. 226
740. 00 5. 229 32. 273
740. 00 5. 237 32.20
740. 00 5. 245 32.67
740. 00 5. 252 32415
740. 00 5260 32. 462
740000 5238 32.25
740. 00 5215 32, 188
740. 00 5193 32, 052
740, 00 5. 171 31, 916
740. 00 5150 31, 781
740. 00 5128 31. 647
740. 00 5, 106 31. 513
740 000 5 ORS 31 % R( 1
0 I
s 10 11 12 I13 14 15 16 I
17 18
Q inflow Q inflow
Q1 to Q3 to Bio 3 to No 3 Q3 vol Q3 MLSS
Isom) Ibs out cum lbs % of inflow Isom) ( gal Ilppml
1>00 500 10
2: 00 550 10
3: 00 900 10
4: 00 400 10
5: 00 500 10
6: 00 600 10
7: 00 700 10
8: 00 900 10
9: 00 800 10
10: 00 1600 10
11: 00 1400 10
12: 00 1600 10
13: 00 1200 10
17: 00 700
18: 00 1500
19: 00 1700
20: 00 1500
21: 00 1700
22: 00 1700
23 C
24: 00.;: ..
0 0
0 0
731, 000
722. 000
713, 000
704, 000
695000
686. 000
677. 000
668. 000
659000

5. 125
5133

5. 140
5, 148
5155
5, 163

5. 170

5. 178

5. 185

31. 247
30, 907
30, 566
30, 224

29. 881
29537
29, 191

28. 845

28. 498

30. 213
30257

30.01 30.45

30.89 30. 434
70 184 30, 662
70 184 30. 891
70 183 31, 119
70 182 31346
70 181 31. 573
70 180 31800
70 180 32026
70 179 32. 251
7a - 17R 39 677
150 NO
150 \ O
150 \ O
150 \ O
150 \ O
150 \ O
150 \ O
150 ` O
150 G
385 32909
386 33342
386 33. 777
387 34213
387 34. 650
388 35. 088
388 35. 528
389 35. 969
389 36. 410
40 200 2444. 080 4, 895
40 220 2. 457280 4903
40 360 2, 478, 880 4, 910
40 160 2, 488.80 4917
40 200 2. 500. 480 4. 924
40 240 2. 514. 880 4, 931
40 280 2. 535. 980 4. 968
40 360 2. 561. 680 5, 005
40 320 2. 585. 080 5, 042
40 640 2. 627,80 5, 079
40 560 2665. 480 5, 116
40 640 2. 708, 080 5153
40 480 2, 741. 080 5, 189
40 600 2, 781280 5. 226
AA ARn 1 R1d IRO 59 )
50 550 2. 856. 280 5. 332
50 350 2. 886. 280 5403
50 750 2. 940. 280 5. 473
50 850 3. 000280 5.44
50 750 3054280 5. 614
50 850 3, 114280 5, 685
50 850 3. 174280 5. 757
50 800 3. 231280 5. 828
50 550 3. 273280 5, 000
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V3 Phase 111 Startup Plan for Bioreactor and Membrane Systems at Lathrop CTF November 18, 2025 City of Lathrop - # A713 Page 11 of 14
800, 00
700, 00
600, 00
o
al500, 00
E
o
400, 00
m
o
m 300, 00
w
o
m
200, 00 -
100, 00
Phase 3 RAS and MBR ON
Day 2, 5: 00 PM
Begin Empty Phase 2
Day1 Day2 Day Day 4
Start- up Timeline
Cray 5 Day Days
6-0
Figure ld. Total volume of sewage in Phase III bioreactors from days 1 through 6.

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V3 Phase III Startup Plan for Bioreactor and Membrane Systems at Lathrop CTF November 18, 2025 City of Lathrop - # A713 Page 12 of 14
Stage 2 — Phase III Operation and Phase II Repairs
The Phase II bioreactors and membranes require repairs before the system can be recommissioned to operate in parallel with Phase II I . The following steps outline the process for operating Phase III while efficiently servicing Phase I I .

Step 2a: Day 6 of Seeding ( afternoon)
Following the final transfer at 70 gpm on the morning of Day 6, the Phase II bioreactors will be shut down, and no additional MLSS will be transferred to the Phase I I I bioreactors. The transfer flow rate will then be increased to 150 gpm to expedite the emptying of the Phase II bioreactors. The remaining 50% of the MLSS in the Phase II bioreactors will be wasted.

Discharge specifications: The remaining 50% MLSS from bioreactor 1 will be wasted and sent to the digesters ( Figure 2a).

Unless otherwise noted, membrane permeate will be chlorinated, dechlorinated, and then discharged to the San Joaquin river.

Table 2a. Day 6 ( afternoon, after 3: 00pm), begin bioreactor 1 emptying. 1 2 3 4 5 6 7 8 I 9 10 11 12 I 13 14 15 18 I 17 18
Q , n mY B. o l Bio 1 Bio 1 Blot Q1 to Q3
l % vol : al •• m Ibs ( gpm) lbs out cum lb,
1: 00 500 10 740. 00 5, 214 32179 - 30. 213
2'. 00 550 10 740, 00 5. 222 32, 226 OK - 30, 257
3: 00 900 10 740. 00 5. 229 32, 273 OK - 30,01
4: 00 400 10 . I 740000 5, 237 32.20 OK - 30.45
5: 00 500 10 740. 00 5245 32,67 OK - 30.89
6: 00 600 10 740. 00 5. 252 32, 415 OK 30, 434
7: 00 700 10 740O00 5, 260 32, 462 71 OK 184 30. 662
8: 00 900 10 :- 740O00 5. 238 32325 7/ OK 184 30, 891
9: 00 800 10 _: 740. 00 5. 215 32, 188 71 OX 183 31. 119 10: 00 1600 10 15-, 740, 00 5. 193 32. 052 70 ' 182 31.46 11: 00 1400 10 1- -- 740. 00 5. 171 31. 916 70 181 31573 12: 00 1600 10 10: 740, 00 5. 150 31. 781 70 180 31. 800 13: 00 1200 10 1:: 740, 00 5. 128 31. 647 70 180 32, 026 14: 90 1500 10 740. 00 5. 106 31513 70 179 32. 251
1590 L 2 _ _ 740. 00 5. 085 31.80 70 178 32 477
16: 00 1100
17: 00 700
18: 00 1500
19: 00 1700
20: 00 1500
21: 00 1700
22: 00 1700
23: 00 1600
74 -nn -nn lino
731. 000 5, 125 31, 247
722, 000 5133 30, 907
713. 000 5. 140 30, 566
704. 000 5. 148 30, 224
695000 5, 155 23. 881
686, 000 5163 29. 537
677, 000 5. 170 29, 191
668. 000 5178 28. 845
659 MA 5 I. Ti 4QR
150 •. 0
150 NO
151 NO
151 NO
ISO NO
151 NO
ISO NO
131 NO
If.• Nn
385 32, 909
386 33,42
386 33, 777
387 34. 213
387 34. 650
388 35. 088
388 35. 528
389 35. 969
uo ue1A
Q inflow Q Inflow
to Bio3 to Bio3 Q3 vol
of inflow ( gpm) ( gal)
Q3 MLSS
ppnn)
40 200 2, 444. 080 4. 895
40 220 2. 457. 280 4. 903
40 360 2, 478. 860 4. 910
40 160 2, 488.80 4, 917
40 200 2. 500. 480 4924
40 240 2. 514, 880 4. 931
40 280 2. 535880 4968
40 360 2. 561, 680 5O05
40 320 2. 585. 080 5. 042
40 640 2. 627.80 5. 079
40 560 2. 565. 480 5. 116
40 640 2. 708. 080 5, 153
40 480 2. 741. 080 5, 189
40 600 2. 781280 5, 226
40 480 2 814280 5 262
50 550 2. 856. 280 5, 332
50 350 2. 886. 280 5, 403
50 750 2, 940280 5, 473
50 850 3. 000, 280 5.44
50 750 3, 054280 5. 614
50 850 3. 114280 5685
50 850 3. 174, 280 5. 757
50 800 3. 231.80 5. 828
5n C.. 1171 ' MI s enn
PACE
V3 Phase III Startup Plan for Bioreactor and Membrane Systems at Lathrop CTF City of Lathrop - # A713
November 18, 2025

Figure 2a. On Day 6, Phase II has been shut down, and 50% of the MLSS activated sludge will be transferred to the digesters.

Step 2c: Days 6 — 90 (finishing as late as Apr '26)
Throughout this timeframe, Phase III is expected to continue to operate efficiently and without interruption.

Simultaneously, maintenance of the Phase II system, particularly the air scour blowers and membranes, will commence.

The maintenance of the membranes requires special care, as they must remain continuously immersed in water and cannot be allowed to dry out. During the repair process, the membranes will be immersed in a mild chlorine - based solution ( 2-5
ppm). The air scour blowers will be repaired and installed for Phase II. If the air scour repair takes longer than 10 days, the soaking membranes shall be gently mixed using a submersible pump to ensure homogeneous conditions. Following blower repair, Phase II membranes 1, 2, and 3 will undergo a full backwash and descaling.

Phase II bioreactors will be temporarily out of service to allow maintenance on the RAS sump and renovation of the influent box ( Figure 2b). However, Phase II membranes will be online and fed with Phase III RAS. Phase I I I RAS pumps will be turned on high to ensure enough pressure to penetrate all six membranes from Phases II and III. The RAS interconnection valve will be open during this step unless a repair is needed in the RAS channel and then the valve will be closed briefly while the Phase II RAS channel equipment is repaired. The Phase II RAS channel will undergo minor renovations of the WAS pumps and mixer mounting brackets.

Once the Phase II bioreactors are repaired, the Phase II and III systems will be ready to run parallel.

PACE
V3 Phase III Startup Plan for Bioreactor and Membrane Systems at Lathrop CTF November 18, 2025 City of Lathrop - # A713 Page 14 of 14

PHASE RI WRF
1 Figure 2b. During days 6 — 90, Phase II bioreactors will be taken offline for maintenance, but Phase II membranes will run.

Step 2d: Days 90+
Following the successful renovation of Phase II, bioreactors 1 and 2 will be replenished with MLSS activated sludge, thereby reversing the previously described process. Bioreactor 1 will be inoculated with MLSS sourced from bioreactor 3, while bioreactor 2 will receive MLSS sourced from bioreactor 4. Phase II RAS pumps will be turned back on. Phases II and III will run parallel. Phase IV bioreactors 5 and 6 are still under construction.

PACE
Exhibit B- 1: Influent Specifications
The following specifications apply to samples taken at the Facility' sinfluent piping manifold:

Influent Specifications under Phase 3 Improvements
Parameter Unit 4 MGD Capacity ADWF

6. 4 MGD Capacity PDF
BOD @ ADWF Lbs/ day 16, 700
BOD @ PDF Lbs/ day 26, 700
TSS @ ADWF Lbs/ day 14, 200
TSS @ PDF Lbs/ day 22, 700
TKN @ ADWF Lbs/ day 2, 300
TKN @ PDF Lbs/ day 3, 700
Influent Specifications under Phase 4 Improvements
Parameter Unit 6. 25 MGD Capacity ADWF

8. MGD Capacity PDF
BOD @ ADWF Lbs/ day 26, 100
BOD @ PDF Lbs/ day 36, 700
TSS @ ADWF Lbs/ day 22,00
TSS @ PDF Lbs/ day 31,00
TKN @ ADWF Lbs/ day 3, 600
TKN @ PDF Lbs/ day 5, 800
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Exhibit K- 1: Service Fee
The monthly Service Fee, as of July 1, 2022, shall be $ 138, 761. 67.

Upon completion of the Construction and Testing outlined in Exhibit N, the monthly Service Fee shall be $ 174, 219. 45.

All future amounts to be adjusted for inflation in each subsequent year as of July 1 of that year as set forth in Section 7.2(b) of the Agreement ( such increase to be adjusted for inflation as set forth in aforementioned section if the Construction and Testing is not completed by July 1, 2026).