Item No. 6.
TO:HONORABLE MAYOR AND MEMBERS OF THE CITY COUNCIL
FROM:OFFICE OF THE CITY MANAGER
BY:MATTHEW BAUMGARDNER, DIRECTOR OF PUBLIC WORKS/CITY ENGINEER DATE:AUGUST 25, 2026
SUBJECT:APPROVAL OF A PROFESSIONAL SERVICES AGREEMENT WITH TETRA TECH, INC.
FOR DESIGN OF SYSTEMWIDE WATER SUPPLY TREATMENT IMPROVEMENTS
EXECUTIVE SUMMARY
The City Council will consider awarding a professional services agreement to Tetra Tech, Inc. in the amount of $8,040,000 for the design of the Systemwide Water Supply Treatment Improvements. The proposed water supply treatment improvements would allow for treatment to remove per- and polyfluoroalkyl substances (PFAS) from groundwater extracted from the City's northerly and southerly groundwater wells. The improvements are necessary to help the City achieve compliance with future state and federal drinking water regulations.
RECOMMENDATION
That the City Council:
1. Approve a professional services agreement with Tetra Tech, Inc. in the amount of $8,040,000 for design of Systemwide Water Supply Treatment Improvements;
2. Authorize the Mayor to execute the agreement; and,
3. Authorize the City Manager to execute any and all amendments to the agreement as deemed necessary.
BACKGROUND
The City relies on groundwater to meet 100% of its potable water and fire flow demands. All wells in the City are impacted by PFAS with varying concentrations of perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS). This project will allow for treatment to remove PFAS from groundwater extracted from the City's northerly and southerly wells. Due to levels of PFOS and PFOA above future National Primary Drinking Water Regulations (NPDWR) Maximum Contaminant Levels (MCLs), the affected wells are at risk of shut down without treatment. The operational goal of the treatment system to be designed for water entering the distribution system is to treat PFOS and PFOA to concentrations lower than the future NPDWR MCL of 4.0 nanograms per liter (ng/L), treat perfluorobutanesulfonic acid (PFBS) and perfluorohexanesulfonic acid (PFHxS) to concentrations lower than the established California (CA) Division of Drinking Water (DDW) Notification Levels (NLs) of 500 ng/L and 3 ng/L, respectively, and to treat perfluorohexanoic acid (PFHxA) to concentrations lower than the proposed CA DDW NL of 1 ug/L.
The proposed professional services agreement would allow for the design of the northerly and southerly water supply treatment improvements, associated influent water distribution pipeline systems from the City’s existing groundwater wells to the treatment plants in question, product water transmission pipeline systems from the treatment plants back out to the City’s existing water transmission system, and associated improvements and services provided herein. The Consultant’s scope of work shall generally consist of the preparation of construction plans, specifications, engineer’s estimate, and record drawings.
ANALYSIS
To initiate design of the Systemwide Water Supply Treatment Improvements, a Request for Proposals (RFP) for design services was published on June 10, 2026 in Planet Bids to consultants experienced in the design of such projects.
On July 16, 2026 staff received proposals from two consulting firms, namely: NCS Engineering, PC and Tetra Tech, Inc. A panel from the Public Works Department reviewed and evaluated the proposals. The results of the proposal evaluations found Tetra Tech, Inc. to have the greatest level of experience, the most comprehensive scope of services, a clear understanding of the project goals and objectives, and to have proposed the most complete design approach and dedicated staff members. Tetra Tech, Inc. demonstrated experience with similar projects completed for the Yorba Linda Water District, Serano Water District, and the Cities of Fullerton and Orange. In addition, Tetra Tech, Inc. possesses the necessary licenses and has met all other requirements for the project.
The scope of Tetra Tech, Inc.’s services includes the following tasks:
Project management
Utility search, research, surveying, and geotechnical analysis Preliminary design including civil, structural, mechanical, electrical, and other analysis Pilot pipe study
Permitting
Final design and preparation of engineer ’s estimate
Water treatment plant and distribution system disinfection and monitoring plan California Environmental Quality Act and National Environmental Pollution Act documentation Public outreach
State Water Resources Control Board emerging contaminant and state revolving fund loan application and assistance
Construction support services
Preparation of As-built/record drawings
Staff is recommending that the City Council approve a professional services agreement with Tetra Tech, Inc. in the amount of $8,040,000 for the design of the Systemwide Water Supply Treatment Improvements. Design is anticipated to begin in September 2026 and be completed by late 2027 during which time the City will pursue grant funding for the construction of such improvements.
CITY COUNCIL PRIORITIES
Quality of Life, Safety and Infrastructure
FISCAL IMPACT
Approval of the recommended actions will result in an expenditure of approximately $8,040,000 as provided in the table below.
Description Amount
Design $8,040,000
Total Estimated Design
Cost:$8,040,000
Sufficient funding is currently available in the Fiscal Year 2026-2027 Water Fund CIP as shown in the table below.
Account
No.Funding Source Amount
51-1-8701 FY 2026-27 Systemwide Water
Supply Treatment Improvements CIP $8,600,000
51-2-8701
FY 2026-27 Systemwide Water
Supply Treatment Improvements CIP
(Federal EPA Grant)
$1,000,000
Total Project Funding:$9,600,000
Attachments
Attachment A: Agreement with Tetra Tech
CITY OF DOWNEY
PROFESSIONAL SERVICES AGREEMENT
WITH TETRA TECH, INC. FOR CIVIL ENGINEERING SERVICES
1. PARTIES AND DATE.
This Agreement is made and entered into this 25th day of August, 2026 by and between the City of Downey, a California municipal corporation and charter city with its principal place of business at 11111 Brookshire Avenue, Downey California 90241 ("City") and Tetra Tech, Inc.,a Delaware corporation,with its principal place of business at 17885 Von Karman Avenue, Suite 500, Irvine, CA 92614 ("Consultant"). City and Consultant are sometimes individually referred to as “Party” and collectively as “Parties.”
2. RECITALS.
2.1 Consultant.
Consultant desires to perform and assume responsibility for the provision of certain professional civil engineering services required by City on the terms and conditions set forth in this Agreement. Consultant represents that it has demonstrated competence and experience in providing civil engineering services to public clients, is licensed in the State of California, and is familiar with the plans of City.
2.2 Project.
City desires to engage Consultant to render such services for the Systemwide Water Supply Treatment Improvements (“Project”) as set forth in this Agreement.
3. TERMS.
3.1 Scope of Services and Term.
3.1.1 General Scope of Services. Consultant promises and agrees to furnish to City all labor, materials, tools, equipment, services, and incidental and customary work necessary to fully and adequately supply the professional civil engineering services necessary for the Project ("Services"). The Services are more particularly described in Exhibit "A", Consultant’s Proposal for Systemwide Water Supply Treatment Improvements attached hereto and incorporated herein by reference. All Services shall be subject to, and performed in accordance with, this Agreement, the exhibits attached hereto and incorporated herein by reference, and all applicable local, state and federal laws, rules and regulations.
3.1.2 Term. The term of this Agreement shall be effective on the date of issuance of the City’s written notice to proceed and shall continue in effect until June 30, 2031, unless earlier terminated as provided herein. Consultant shall complete the Services within the term of this Agreement, and shall meet any other established schedules and deadlines. The term of this Agreement may be extended by written amendment to this Agreement signed by the City Manager and the Consultant.
3.2 Responsibilities of Consultant.
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
2 3.2.1 Control and Payment of Subordinates; Independent Contractor. The Services shall be performed by Consultant or under its supervision. Consultant will determine the means, methods and details of performing the Services subject to the requirements of this Agreement. City retains Consultant on an independent contractor basis and not as an employee. Consultant retains the right to perform similar or different services for others during the term of this Agreement. Any additional personnel performing the Services under this Agreement on behalf of Consultant shall also not be employees of City and shall at all times be under Consultant's exclusive direction and control. Consultant shall pay all wages, salaries, and other amounts due such personnel in connection with their performance of Services under this Agreement and as required by law. Consultant shall be responsible for all reports and obligations respecting such additional personnel, including, but not limited to: social security taxes, income tax withholding, unemployment insurance, disability insurance, and workers' compensation insurance.
In the event that Consultant or any employee, agent, or subcontractor of Consultant providing services under this Agreement claims or is determined by a court of competent jurisdiction or the California Public Employees Retirement System (CalPERS) to be eligible for enrollment in CalPERS as an employee of City, Consultant shall indemnify, defend, and hold harmless CITY for the payment of any employee and/or employer contributions for CalPERS benefits on behalf of Consultant or its employees, agents, or subcontractors, as well as for the payment of any penalties and interest on such contributions, which would otherwise be the responsibility of City.
3.2.2 Schedule of Services. Consultant shall perform the Services expeditiously, within the term of this Agreement, and in accordance with the Schedule of Services set forth in Exhibit "A" attached hereto and incorporated herein by reference.
Consultant represents that it has the professional and technical personnel required to perform the Services in conformance with such conditions. In order to facilitate Consultant's conformance with the Schedule, City shall respond to Consultant's submittals in a timely manner. Upon request of City, Consultant shall provide a more detailed schedule of anticipated performance to meet the Schedule of Services. The parties acknowledge that the Schedule of Services may be amended by mutual agreement due to changes in circumstances, including changes in the performance schedules of other third parties performing work for the City on the Project, which affect the timing of Consultant's performance of the Services.
3.2.3 Conformance to Applicable Requirements. All work prepared by Consultant shall be subject to the approval of City.
3.2.4 Substitution of Key Personnel. Consultant has represented to City that certain key personnel will perform and coordinate the Services under this Agreement. Should one or more of such personnel become unavailable, Consultant may substitute other personnel of at least equal competence upon written approval of City. In the event that City and Consultant cannot agree as to the substitution of key personnel, City shall be entitled to Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
3 terminate this Agreement for cause. As discussed below, any personnel who fail or refuse to perform the Services in a manner acceptable to the City, or who are determined by the City to be uncooperative, incompetent, a threat to the adequate or timely completion of the Project or a threat to the safety of persons or property, shall be promptly removed from the Project by the Consultant at the request of the City.
3.2.5 City’s Representative. The City hereby designates City Manager, or his or her designee, to act as its representative for the performance of this Agreement (“City’s Representative”). City’s Representative shall have the power to act on behalf of the City for all purposes under this Contract. Consultant shall not accept direction or orders from any person other than the City’s Representative or his or her designee.
3.2.6 Consultant’s Representative. Consultant hereby designates Steve Tedesco, or his or her designee, to act as its representative for the performance of this Agreement (“Consultant’s Representative”). Consultant’s Representative shall have full authority to represent and act on behalf of the Consultant for all purposes under this Agreement. The Consultant’s Representative shall supervise and direct the Services, using his best skill and attention, and shall be responsible for all means, methods, techniques, sequences and procedures and for the satisfactory coordination of all portions of the Services under this Agreement.
3.2.7 Coordination of Services. Consultant agrees to work closely with City staff in the performance of Services and shall be available to City's staff, consultants and other staff at all reasonable times.
3.2.8 Standard of Care; Performance of Employees. Consultant shall perform all Services under this Agreement in a skillful and competent manner, consistent with the standards generally recognized as being employed by professionals in the same discipline in the State of California. Consultant represents and maintains that it is skilled in the professional calling necessary to perform the Services. Consultant warrants that all employees and subcontractors shall have sufficient skill and experience to perform the Services assigned to them. Finally, Consultant represents that it, its employees and subcontractors have all licenses, permits, qualifications and approvals of whatever nature that are legally required to perform the Services, including a City Business License, and that such licenses and approvals shall be maintained throughout the term of this Agreement. As provided for in the indemnification provisions of this Agreement, Consultant shall perform, at its own cost and expense and without reimbursement from the City, any services necessary to correct errors or omissions which are caused by the Consultant’s failure to comply with the standard of care provided for herein. Any employee of the Consultant or its sub-consultants who is determined by the City to be uncooperative, incompetent, a threat to the adequate or timely completion of the Project, a threat to the safety of persons or property, or any employee who fails or refuses to perform the Services in a manner consistent with the standard of care set forth herein, shall be promptly removed from the Project by the Consultant and shall not be re-employed to perform any of the Services or to work on the Project.
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
4 3.2.9 Laws and Regulations. Consultant shall keep itself fully informed of and in compliance with all applicable local, state and federal laws, rules and regulations in force at the time the Services are performed by Consultant and in any manner affecting the performance of the Project or the Services, including all applicable Cal/OSHA requirements, and shall give all notices required by law. Consultant shall be liable for all violations of such laws and regulations in connection with Services. If the Consultant performs any work knowing it to be contrary to such laws, rules and regulations and without giving written notice to the City, Consultant shall be solely responsible for all costs arising therefrom. Consultant shall defend, indemnify and hold City, its officials, directors, officers, employees and agents free and harmless, pursuant to the applicable indemnification provisions of this Agreement, from any claim or liability arising out of any failure or alleged failure to comply with such laws, rules or regulations. Consultant’s violation of such laws, rules and regulations shall also constitute a material breach of this Agreement.
3.2.10 Insurance.
3.2.10.1 Time for Compliance. Consultant shall not commence the Services or the Project under this Agreement until it has provided evidence satisfactory to the City that it has secured all insurance required under this section. In addition, Consultant shall not allow any subcontractor to commence work on any subcontract until it has provided evidence satisfactory to the City that the subcontractor has secured all insurance required under this section. The City reserves the right to modify these requirements, including limits, based on the nature of the risk, prior experience with insurer, coverage or other special circumstances.
3.2.10.2 Minimum Requirements. Consultant shall, at its expense, procure and maintain for the duration of the Agreement insurance against claims for injuries to persons or damages to property which may arise from or in connection with the performance of the Agreement, the Services or the Project by the Consultant, its agents, representatives, employees or subcontractors. Consultant shall also require all of its subcontractors to procure and maintain the same insurance for the duration of the Agreement. Such insurance shall meet at least the following minimum levels of coverage:
(A) Minimum Scope of Insurance. (1)Commercial General
Liability (CGL): Insurance Services Office Form CG 00 01 covering CGL on an “occurrence” basis including products and completed operations, property damage, bodily injury and personal and advertising injury; (2)Automobile Liability: Insurance Services Office Form Number CA 0001 covering Code 1 (any auto) or if Consultant owns no autos, Code 8 (hired) and 9 (non-owned); and (3)Workers’ Compensation : Workers’ Compensation insurance as required by the State of California with Statutory Limits; and (4) Employer’s Liability Insurance.
(B) Minimum Limits of Insurance. Consultant shall maintain limits no less than: (1)Commercial General Liability (CGL):No less than $2,000,000 per occurrence for products and completed operations, bodily injury, property damage and Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
5 personal and advertising injury. If Commercial General Liability Insurance or other form with general aggregate limit applies, either the general aggregate limit shall apply separately to this Agreement/location (ISO CG 25 03 or 25 04) or the general aggregate limit shall be twice the required occurrence limit; (2)Automobile Liability:No less than $2,000,000 per accident for bodily injury and property damage; and (3)Workers’ Compensation:Workers’ Compensation limits as required by the Labor Code of the State of California with Statutory Limits; (4) Employer’s Liability: Employer’s Liability limits of no less than $2,000,000 per accident for bodily injury or disease. Employer’s Liability coverage may be waived by the City if City receives written verification that Consultant has no employees.
If the Consultant maintains broader coverage and/or higher limits than the minimum shown in this subdivision 3.2.10.2, the City requires and shall be entitled to the broader coverage and/or the higher limits maintained by the Consultant. Any available insurance proceeds in excess of the specified minimum limits of insurance and coverage shall be available to the City.
3.2.10.3 Professional Liability (Errors & Omissions). Consultant shall procure and maintain, and require its sub-consultants to procure and maintain, for a period of five (5) years following completion of the Services or the Project, errors and omissions liability insurance appropriate to its profession. Such insurance shall be in an amount not less than $2,000,000 per occurrence or claim and $2,000,000 in the aggregate, and shall be endorsed to include contractual liability. If the Consultant maintains broader coverage and/or higher limits than the minimum shown in this subdivision 3.2.10.3, the City requires and shall be entitled to the broader coverage and/or higher limits maintained by the Consultant. Any available insurance proceeds in excess of the specified minimum limits of insurance and coverage shall be available to the City.
3.2.10.4 Insurance Endorsements. The insurance policies shall contain the following provisions, or Consultant shall provide endorsements on forms approved by the City to add the following provisions to the insurance policies:
(A) Additional Insured Status. The Commercial General
Liability policy shall be endorsed to state that: (1) the City, its directors, officials, officers, employees, agents and volunteers shall be covered as additional insureds with respect to liability arising from the work, Services, Project or operations performed by or on behalf of the Consultant, including materials, parts or equipment furnished in connection with such work, Services. Project or operations; and (2) the insurance coverage shall be primary insurance as respects the City, its directors, officials, officers, employees, agents and volunteers, or if excess, shall stand in an unbroken chain of coverage excess of the Consultant’s scheduled underlying coverage. Commercial General Liability insurance coverage may be provided in the form of an endorsement to the Consultant’s insurance (at lease as broad as ISO Form CG 20 10 11 85 or both CG 20 10, CG 20 26, CG 20 33 or CG 20 38; and CG 20 37 forms if later revisions are used).
(B) Waiver of Subrogation. Consultant hereby grants to City a waiver of any right to subrogation which any insurer of said Consultant may acquire against Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
6 the City by virtue of the payment of any loss under said insurance policies set forth herein. Consultant agrees to obtain any endorsement that may be necessary to affect this waiver of subrogation, but this provision applies regardless of whether or not the City has received a waiver of subrogation endorsement from the insurer. (C) All Coverages. Each insurance policy required by this Agreement shall be endorsed to state that: (A) coverage shall not be suspended, voided, reduced or canceled except with written notice by certified mail, return receipt requested to the City; and (B) any failure to comply with reporting or other provisions of the policies, including breaches of warranties, shall not affect coverage provided to the City, its directors, officials, officers, employees, agents and volunteers.
3.2.10.5 Primary Coverage. For any claims related to this Agreement, the Consultant’s insurance coverage shall be primary insurance and primary coverage at least as broad as ISO CG 20 01 04 13 with respect to the City, its directors, officials, officers, employees, agents and volunteers. Any insurance or self-insurance maintained by the City, its directors, officials, officers, employees, agents and volunteers shall be excess of the Consultant’s insurance and shall not be called upon to contribute with it in any way.
3.2.10.6 Separation of Insureds; No Special Limitations. All insurance required by this Section shall contain standard separation of insureds provisions.
In addition, such insurance shall not contain any special limitations on the scope of protection afforded to the City, its directors officials, officers, employees, agents and volunteers.
3.2.10.7 Deductibles and Self-Insurance Retentions. Any deductibles or self-insured retentions must be declared to and approved by the City. City may require Consultant to provide proof of ability to pay losses and related investigations, claim administration and defense expenses and costs within the retention. The policy language shall provide or be endorsed to provide that the self-insured retention may be satisfied by either the named insured or City.
3.2.10.8 Acceptability of Insurers. Insurance is to be placed with insurers with a current A.M. Best’s rating no less than A:VII, authorized to do business in California, and satisfactory to the City.
3.2.10.9 Verification of Coverage. Consultant shall furnish City with original certificates of insurance, including all required amendatory endorsements (or copies of the applicable policy language effective coverage required by this provision) and a copy of the Declarations and Endorsement Page of the Commercial General Liability policy listing all policy endorsements to the City before the commencement of work under this Agreement.
However, failure to obtain the required documents prior to the commencement of work under this Agreement shall not waive the Consultant’s obligation to provide them to the City. The City reserves the right to require complete, certified copies of all required insurance policies, including endorsements, at any time.
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
7 3.2.10.10 Claims-Made Policies. If any of the policies provide coverage on a claims-made basis:
(A) The retroactive date must be shown and must be before the date of this Agreement or the date work commences under this Agreement, whichever is earliest; (B) Insurance must be maintained and evidence of insurance must be provided for at least five (5) years after completion of the Services provided under this Agreement;
(C) If coverage is canceled, non-renewed, and not replaced with another claims-made policy form with a retroactive date prior to the effective date of this Agreement or the date work commences under this Agreement, whichever is earliest, the Consultant must purchase extended reporting coverage for a minimum of five (5) years after completion of the Services under this Agreement.
3.2.11 Safety. Consultant shall execute and maintain its work so as to avoid injury or damage to any person or property. In carrying out its Services, the Consultant shall at all times be in compliance with all applicable local, state and federal laws, rules and regulations, and shall exercise all necessary precautions for the safety of employees appropriate to the nature of the work and the conditions under which the work is to be performed. Safety precautions as applicable shall include, but shall not be limited to: (A) adequate life protection and life-saving equipment and procedures; (B) instructions in accident prevention for all employees and subcontractors, such as safe walkways, scaffolds, fall protection ladders, bridges, gang planks, confined space procedures, trenching and shoring, equipment and other safety devices, equipment and wearing apparel as are necessary or lawfully required to prevent accidents or injuries; and (C) adequate facilities for the proper inspection and maintenance of all safety measures.
3.3 Fees and Payments.
3.3.1 Compensation. Consultant shall receive compensation, including authorized reimbursements, for all Services rendered under this Agreement at the rates set forth in Exhibit "A" attached hereto and incorporated herein by reference. The total compensation shall not exceed Eight Million Forty Thousand Dollars ($8,040,000.00) without written approval of the City. Extra Work may be authorized, as described below, and if authorized, said Extra Work will be compensated at the rates and manner set forth in Exhibit “A” attached to this Agreement.
3.3.2 Payment of Compensation. Consultant shall submit to City a monthly itemized statement which indicates work completed and hours of Services rendered by Consultant. The statement shall describe the amount of Services and supplies provided since the initial commencement date, or since the start of the subsequent billing periods, as appropriate, through the date of the statement. City shall, within thirty (30) days of receiving such statement, review the statement and pay all approved charges thereon.
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
8 3.3.3 Reimbursement for Expenses. Consultant shall not be reimbursed for any expenses unless authorized in writing by City.
3.3.4 Extra Work. At any time during the term of this Agreement, City may request that Consultant perform Extra Work. As used herein, "Extra Work" means any work which is determined by City to be necessary for the proper completion of the Project, but which the parties did not reasonably anticipate would be necessary at the execution of this Agreement. Consultant shall not perform, nor be compensated for, Extra Work without written authorization from the City Manager.
3.3.5 Prevailing Wages. Pursuant to Downey Municipal Code Section 2935, the requirements of California Labor Code Sections 1720 et seq. and 1770 et seq., as well as California Code of Regulations, Title 8, Section 16000 et seq. (“Prevailing Wage Laws”), which require the payment of prevailing wage rates and the performance of other requirements on certain “public works” and “maintenance” projects, shall apply to the Project.
Consultant agrees to fully comply with such Prevailing Wage Laws. City shall provide Consultant with a copy of the prevailing rates of per diem wages in effect at the commencement of this Agreement. Consultant shall make copies of the prevailing rates of per diem wages for each craft, classification or type of worker needed to execute the Services available to interested parties upon request, and shall post copies at the Consultant’s principal place of business and at the Project site. Consultant shall defend, indemnify and hold the City, its elected officials, officers, employees and agents free and harmless from any claims, liabilities, costs, penalties or interest arising out of any failure or alleged failure to comply with the Prevailing Wage Laws. If applicable, Consultant shall be registered at all times with the Department of Industrial Relations under the Public Works Contractor Registration Program for Labor Compliance.
3.4 Accounting Records.
3.4.1 Maintenance and Inspection. Consultant shall maintain complete and accurate records with respect to all costs and expenses incurred under this Agreement. All such records shall be clearly identifiable. Consultant shall allow a representative of City during normal business hours to examine, audit, and make transcripts or copies of such records and any other documents created pursuant to this Agreement. Consultant shall allow inspection of all work, data, documents, proceedings, and activities related to the Agreement for a period of three (3) years from the date of final payment under this Agreement.
3.5 General Provisions.
3.5.1 Termination of Agreement.
3.5.1.1 Grounds for Termination. City may, by written notice to Consultant, terminate the whole or any part of this Agreement at any time either for cause or for the City's convenience and without cause by giving written notice to Consultant of such termination, and specifying the effective date thereof, at least seven (7) days before the Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
9 effective date of such termination. Consultant may only terminate this Agreement for cause upon giving the City not less than seven (7) calendar days' written notice.
Upon termination, Consultant shall be compensated only for those services which have been adequately rendered to City, and Consultant shall be entitled to no further compensation. The City shall within fifteen (15) calendar days following termination pay the Consultant for all services adequately rendered and all reimbursable costs incurred by Consultant up to the date of termination, in accordance with the payment provisions of this Agreement.
The following reasons shall constitute "cause" for which either party may terminate this Agreement as provided herein:
• Substantial failure by the other party to perform in accordance with the terms of this Agreement and through no fault of the terminating party; • Assignment of this Agreement or transfer of the Project by either party to any other entity without the prior written consent of the other party; • Suspension of the Project or the Consultant's Services by the City for more than ninety (90) calendar days, consecutive or in the aggregate, without good cause; • Material changes in the conditions under which this Agreement was entered into, the Scope of Services or the nature of the Project, and the failure of the parties to reach agreement on the compensation and schedule adjustments necessitated by such changes.
3.5.1.2 Effect of Termination. If this Agreement is terminated as provided herein, City may require Consultant to provide all finished or unfinished Documents and Data and other information of any kind prepared by Consultant in connection with the performance of Services under this Agreement. Consultant shall be required to provide such Documents and Data and other information within fifteen (15) days of the City's request.
3.5.1.3 Additional Services. In the event this Agreement is terminated in whole or in part as provided herein, City may procure, upon such terms and in such manner as it may determine appropriate, services similar to those terminated.
3.5.2 Delivery of Notices. All notices permitted or required under this Agreement shall be given to the respective parties at the following address, or at such other address as the respective parties may provide in writing for this purpose:
Consultant:
Tetra Tech, Inc.
17885 Von Karmen Avenue, Suite 500
Irvine, CA 92614
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
10 Phone: (949) 632-2169
Attn: Steve Tedesco, P.E., Sr. Vice President
City:
City of Downey
11111 Brookshire Avenue
Downey, California 90241
Phone: (562) 904-7286
Fax: (562) 904-7296
Attn: Matt Baumgardner, P.E.,
Director of Public Works/City Engineer
With a courtesy copy to:
City of Downey
City Attorney’s Office
11111 Brookshire Avenue
Downey, California 90241
Such notice shall be deemed made when personally delivered or when mailed, forty- eight (48) hours after deposit in the U.S. Mail, first class postage prepaid and addressed to the party at its applicable address. Actual notice shall be deemed adequate notice on the date actual notice occurred, regardless of the method of service.
3.5.3 Ownership of Materials and Confidentiality.
3.5.3.1 Documents & Data; Licensing of Intellectual Property. This Agreement creates a non-exclusive and perpetual license for City to copy, use, modify, reuse, or sublicense any and all copyrights, designs, and other intellectual property embodied in plans, specifications, studies, drawings, estimates, and other documents or works of authorship fixed in any tangible medium of expression, including but not limited to, physical drawings or data magnetically or otherwise recorded on computer diskettes, which are prepared or caused to be prepared by Consultant under this Agreement (“Documents & Data”). Consultant shall require all subcontractors to agree in writing that City is granted a non-exclusive and perpetual license for any Documents & Data the subcontractor prepares under this Agreement. Consultant represents and warrants that Consultant has the legal right to license any and all Documents & Data. Consultant makes no such representation and warranty in regard to Documents & Data which were prepared by design professionals other than Consultant or provided to Consultant by the City. City shall not be limited in any way in its use of the Documents and Data at any time, provided that any such use not within the purposes intended by this Agreement shall be at City’s sole risk.
3.5.3.2 Confidentiality. All ideas, memoranda, specifications, plans, procedures, drawings, descriptions, computer program data, input record data, written information, and other Documents and Data either created by or provided to Consultant in Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
11 connection with the performance of this Agreement shall be held confidential by Consultant.
Such materials shall not, without the prior written consent of City, be used by Consultant for any purposes other than the performance of the Services. Nor shall such materials be disclosed to any person or entity not connected with the performance of the Services or the Project. Nothing furnished to Consultant which is otherwise known to Consultant or is generally known, or has become known, to the related industry shall be deemed confidential.
Consultant shall not use City's name or insignia, photographs of the Project, or any publicity pertaining to the Services or the Project in any magazine, trade paper, newspaper, television or radio production or other similar medium without the prior written consent of City.
3.5.4 Cooperation; Further Acts. The Parties shall fully cooperate with one another, and shall take any additional acts or sign any additional documents as may be necessary, appropriate or convenient to attain the purposes of this Agreement.
3.5.5 Attorney's Fees. In the event of any litigation, whether in a court of law, administrative hearing, arbitration, or otherwise, arising from or related to this Agreement of the services provided under this Agreement, the prevailing party shall be entitled to recover from the non-prevailing party all reasonable costs incurred, including staff time, court costs, attorneys' fees and all other related expenses in such litigation.
3.5.6 Indemnification.
3.5.6.1 General Indemnification. Except as provided in subdivision
3.5.6.2 below which is applicable to “design professionals” only, Consultant shall defend (with counsel acceptable to City), indemnify and hold the City, its officials, officers, employees, volunteers and agents free and harmless from any and all claims, demands, causes of action, costs, expenses, liability, loss, damage or injury, in law or equity, to property or persons, including wrongful death, in any manner arising out of or incident to any alleged negligent acts, errors, omissions or willful misconduct of Consultant, its officials, officers, employees, agents, consultants and contractors arising out of or in connection with the performance of the Services, the Project or this Agreement, including without limitation the payment of all consequential damages and attorneys’ fees and other related costs and expenses. The Consultant’s duty to indemnify shall extend to any and all claims, demands, causes of action, costs, expenses, liability, loss, damage or injury, in law or equity that Consultant and/or its personnel are employees of the City, have been misclassified as an independent contractors, or failed to pay any or all necessary state or federal withholdings and/or taxes. Consultant shall defend, at Consultant's own cost, expense and risk, any and all such aforesaid suits, actions or other legal proceedings of every kind that may be brought or instituted against City, its directors, officials, officers, employees, agents or volunteers. Consultant shall pay and satisfy any judgment, award or decree that may be rendered against City or its directors, officials, officers, employees, agents or volunteers, in any such suit, action or other legal proceeding. Consultant shall reimburse City and its directors, officials, officers, employees, agents and/or volunteers, for any and all legal expenses and costs incurred by each of them in connection therewith or in enforcing the indemnity herein provided. Consultant's obligation to indemnify shall not be restricted to insurance proceeds, if any, received by the City, its Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
12 directors, officials officers, employees, and agents or volunteers. Consultant shall not be obligated to defend, indemnify or hold the City harmless in any manner whatsoever for any claims or liability arising solely out of the City's own negligent acts, errors or omissions or willful misconduct.
3.5.6.2 Design Professionals. The provisions of this subdivision
3.5.6.2 shall apply only in the event that Consultant is a "design professional" within the meaning of California Civil Code section 2782.8(c). If Consultant is a "design professional" within the meaning of Section 2782.8(c), then, notwithstanding subdivision 3.5.6.1 above, to the fullest extent permitted by law (including, without limitation, Civil Code sections 2782 and 2782.6), Consultant shall defend (with legal counsel reasonably acceptable to City), indemnify and hold harmless City and City’s officers, officials, employees, volunteers and agents from and against any Claim that arises out of, pertains to, or relates to, directly or indirectly, in whole or in part, the negligence, recklessness, or willful misconduct of Consultant, any subconsultant, subcontractor or any other person directly or indirectly employed by them, or any person that any of them control, arising out of Consultant's performance of any task or service for or on behalf of City under this Agreement. The Consultant’s duty to indemnify shall extend to any and all claims, demands, causes of action, costs, expenses, liability, loss, damage or injury, in law or equity that Consultant and/or its personnel are employees of the City, have been misclassified as an independent contractors, or failed to pay any or all necessary state or federal withholdings and/or taxes. Such obligations to defend, hold harmless and indemnify City or any City officers, officials, employees or volunteers shall not apply to the extent that such Claims are caused in part by the sole active negligence or willful misconduct of City or such City officers, officials, employees, volunteers and agents. Consultant's cost to defend City and/or City’s officers, officials, employees or volunteers against any such Claim shall not exceed Consultant's proportionate percentage of fault with respect to that Claim; however, pursuant to Civil Code section 2782.8(a), in the event that one or more defendants is unable to pay its share of defense costs due to bankruptcy or dissolution of the business, Consultant shall meet and confer with City (and, if applicable, other parties) regarding any unpaid defense costs. To the extent Consultant has a duty to indemnify City or any City officers, officials, employees, volunteers and/or agents under this subdivision 3.5.6.2, Consultant shall be responsible for all incidental and consequential damages resulting directly or indirectly, in whole or in part, from Consultant's negligence, recklessness or willful misconduct.
3.5.7 Entire Agreement. This Agreement contains the entire Agreement of the parties with respect to the subject matter hereof, and supersedes all prior negotiations, understandings or agreements.
3.5.8 Governing Law. This Agreement shall be governed by the laws of the State of California. Venue shall be the courts in Los Angeles County.
3.5.9 Time of Essence. Time is of the essence for each and every provision of this Agreement.
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
13 3.5.10 City's Right to Employ Other Consultants. City reserves right to employ other consultants in connection with this Project.
3.5.11 Successors and Assigns. This Agreement shall be binding on the successors and assigns of the parties.
3.5.12 Assignment or Transfer. Neither party shall assign, hypothecate, or transfer, either directly or by operation of law, this Agreement or any interest herein without the prior written consent of the other party. Any attempt to do so shall be null and void, and any assignees, hypothecates or transferees shall acquire no right or interest by reason of such attempted assignment, hypothecation or transfer.
3.5.13 Construction; References; Captions. Since the Parties or their agents have participated fully in the preparation of this Agreement, the language of this Agreement shall be construed simply, according to its fair meaning, and not strictly for or against any Party. Any term referencing time, days or period for performance shall be deemed calendar days and not work days. All references to Consultant include all personnel, employees, agents, and subcontractors of Consultant, except as otherwise specified in this Agreement.
All references to City include its elected officials, officers, employees, agents and volunteers except as otherwise specified in this Agreement. The captions of the various articles and paragraphs are for convenience and ease of reference only, and do not define, limit, augment, or describe the scope, content, or intent of this Agreement.
3.5.14 Amendment; Modification. No supplement, modification, or amendment of this Agreement shall be binding unless executed in writing and signed by both Parties.
3.5.15 Waiver. No waiver of any default shall constitute a waiver of any other default or breach, whether of the same or other covenant or condition. No waiver, benefit, privilege, or service voluntarily given or performed by a Party shall give the other Party any contractual rights by custom, estoppel, or otherwise.
3.5.16 No Third Party Beneficiaries. There are no intended third party beneficiaries of any right or obligation assumed by the Parties.
3.5.17 Invalidity; Severability. If any portion of this Agreement is declared invalid, illegal, or otherwise unenforceable by a court of competent jurisdiction, the remaining provisions shall continue in full force and effect.
3.5.18 Prohibited Interests. Consultant maintains and warrants that it has not employed nor retained any company or person, other than a bona fide employee working solely for Consultant, to solicit or secure this Agreement. Further, Consultant warrants that it has not paid nor has it agreed to pay any company or person, other than a bona fide employee working solely for Consultant, any fee, commission, percentage, brokerage fee, gift or other consideration contingent upon or resulting from the award or making of this Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
14 Agreement. For breach or violation of this warranty, City shall have the right to rescind this Agreement without liability. For the term of this Agreement, no member, officer or employee of City, during the term of his or her service with City, shall have any direct interest in this Agreement, or obtain any present or anticipated material benefit arising therefrom.
3.5.19 Equal Opportunity Employment. Consultant represents that it is an equal opportunity employer and it shall not discriminate against any subcontractor, employee or applicant for employment because of race, religion, color, national origin, handicap, ancestry, sex or age. Such non-discrimination shall include, but not be limited to, all activities related to initial employment, upgrading, demotion, transfer, recruitment or recruitment advertising, layoff or termination. Consultant shall also comply with all relevant provisions of any City Minority Business Enterprise program, Affirmative Action Plan or other related programs or guidelines currently in effect or hereinafter enacted. During the performance of this contract, Consultant and its subconsultants agree to follow equal opportunity employment provisions as provided in Title 41 of the Code of Federal Regulations (CFR) Section 60-1.4(b) which requirements are hereby incorporated into this Agreement.
3.5.20 Labor Certification. By its signature hereunder, Consultant certifies that it is aware of the provisions of Section 3700 of the California Labor Code which require every employer to be insured against liability for Worker's Compensation or to undertake self- insurance in accordance with the provisions of that Code, and agrees to comply with such provisions before commencing the performance of the Services.
3.5.21 Authority to Enter Agreement. Consultant has all requisite power and authority to conduct its business and to execute, deliver, and perform the Agreement. Each Party warrants that the individuals who have signed this Agreement have the legal power, right, and authority to make this Agreement and bind each respective Party.
3.5.22 Counterparts. This Agreement may be executed in counterparts, each of which shall constitute one and the same instrument.
3.5.23 Effect of Conflict. In the event of any conflict, inconsistency, or incongruity between any provision of this Agreement, any of its exhibits, attachments, purchase order, or notice to proceed, the provisions of this Agreement will govern and control.
3.6 Subcontracting.
3.6.1 Prior Approval Required. Consultant shall not subcontract any portion of the work required by this Agreement, except as expressly stated herein, without prior written approval of City. Consultant shall require and verify that all subcontractors maintain insurance meeting all of the requirements set forth in this Agreement. Consultant shall ensure that City is an additional insured as required in Section 3.2.10.4. Subcontracts, if any, shall contain a provision making them subject to all provisions stipulated in this Agreement.
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
15 3.7 Miscellaneous.
3.7.1 Debarment and Suspension. A contract award shall not be made to any Consultant and its subconsultants listed on the governmentwide exclusions in the System for Award Management (SAM), in accordance with the United States Office of Management and Budget (OMB) guidelines contained in 2 C.F.R. part 180 that implement Executive Orders 12549 (3 C.F.R. part 1986 Comp., p. 189) and 12689 (3 C.F.R. part 1989 Comp., p. 235), “Debarment and Suspension.”.
3.7.2 Anti-Lobbying. Consultants who apply or bid for an award of more than $100,000 shall file the required certification in accordance with Title 31 United States Code (USC) Section 1352 which requirements are hereby incorporated into this Agreement. Each tier certifies to the tier above that it will not and has not used federally appropriated funds to pay any person or organization for influencing or attempting to influence an officer or employee of any agency, a Member of Congress, officer or employee of Congress, or an employee of a Member of Congress in connection with obtaining any federal contract, grant, or any other award covered by 31 USC Section 1352. Each tier shall also disclose any lobbying with non-federal funds that takes place in connection with obtaining any federal award. Such disclosures shall be forwarded from tier to tier up to the recipient who in turn will forward the certification(s) to the federal awarding agency.
TETRA TECH, INC.CITY OF DOWNEY,
a Delaware Corporationa California municipal corporation and charter city
By:By:
Claudia M. Frometa, Mayor
______________________________
Steve Tedesco
Sr. Vice PresidentIts:
Attest:Attest:
_____________________________
SecretaryMaria Alicia Duarte, CMC City Clerk
Approved as to Form:Approved as to Form:
_______________________________________________________ Legal CounselJohn Funk, City Attorney
0119.123859
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
1 EXHIBIT "A"
SCOPE OF SERVICES, SCHEDULE,AND COMPENSATION
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
PROPOSAL TO PROVIDE
SYSTEMWIDE
WATER SUPPLY TREATMENT
IMPROVEMENTS
Capital Improvement
Project No.24-22
Northerly Water Supply
Treatment Improvements
Capital Improvement
Project No.26-28
Southerly Water Supply
Treatment Improvements
YORBA LINDA WATER DISTRICT
HEADQUARTERS PEAS TREATMENT PLANT
TETRA TECH
JULY 2026
EXHIBIT A
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
City of Downey - Public Works Department
Dan Mueller, Deputy Director of Public Works/Utilities Manager 11111 Brookshire Avenue
Downey, CA 90241
RE: Systemwide Water Supply Treatment Improvements
Dear Mr. Mueller and Selection Team:
The City of Downey is working to secure a reliable, long-term groundwater supply by implementing two regional PFAS treatment facilities that will protect drinking water quality, while maintaining uninterrupted service to the community.
Delivering this program requires a consultant with a thorough understanding of the City’s groundwater system, proven experience designing and implementing PFAS treatment facilities throughout Southern California, and the expertise to guide the project from planning through design, permitting, construction, and startup.
Since 2020, Tetra Tech has partnered with the City to evaluate PFAS impacts, develop the Citywide PFAS Evaluation Report, and establish the treatment strategy that forms the foundation of this project. We are pleased to continue that partnership and oer the following advantages:
1. Downey-Specic Knowledge: We understand the City’s groundwater system, operational objectives, and treatment strategy because we developed the Citywide PFAS Evaluation Report and have visited every well site that will be incorporated into this program.
2. Proven PFAS Team: Our proposed team has successfully delivered PFAS treatment projects for Downey and numerous Southern California water agencies, bringing practical lessons learned from planning, design, permitting, and construction.
3. Demonstrated PFAS Success: This team has designed ten PFAS treatment facilities, including the rst operating PFAS treatment plant in Orange County and the nation’s largest ion exchange PFAS treatment facility. We also have extensive experience securing and administering federal, state, and local funding.
4. Reliable Project Delivery: Our project management approach is built around accurate cost estimating, proactive schedule management, and disciplined quality control. Our references can conrm our consistent record of delivering PFAS projects on schedule and within budget.
5. Practical, Innovative Solutions: Drawing on experience from completed PFAS facilities, we have developed innovations in pilot testing, regulatory coordination, equipment procurement, and construction sequencing that reduce project risk, schedule, and cost.
6. Local Resources and Regulatory Experience: Our Irvine sta are committed to this project and bring extensive experience working with local agencies, permitting authorities, and regulatory requirements throughout Southern California.
7. Trusted Performance: Our PFAS projects have earned six ASCE awards and a reputation for technical excellence, responsiveness, and successful project delivery.
8. Complete Project Delivery: From planning through startup, Tetra Tech provides all engineering disciplines, environmental services,funding support,construction management,commissioning,and specialty subconsultants required to successfully deliver this program.
Our team understands the importance of this investment to the City and its residents. As your project manager, I will serve as your single point-of-contact and ensure our team delivers a high-quality project that meets your schedule, budget, and performance expectations. The rendering on our proposal cover illustrates our vision for thecompleted Southerly Treatment Plant. I welcome the opportunity to discuss our qualications and can be reached at 949.632.2169 with any questions. I hereby acknowledge Addendum 1.
Sincerely,
17885 Von Karman Avenue | Suite 500 | Irvine, CA 92614-5227 Tel 949.809.5000 Fax 949.809.5010 tetratech.com
Steve Tedesco, PE, BCEE, Project Manager
Sr. Vice President | 949.632.2169
[email protected]
August 3, 2026
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 CITY OF DOWNEY 2
As the City of Downey advances implementation of its
systemwide PFAS treatment program, Tetra Tech oers
extensive experience delivering PFAS treatment facilities that meet U.S. EPA and California Division of Drinking
Water requirements.
Our PFAS removal designs incorporate cutting-edge
technologies such as granular activated carbon (GAC)
adsorption, ion exchange (IX) resins, and ultraviolet (UV) advanced oxidation processes (AOP), depending on
site-specic needs.TetraTech’s engineers are skilled in conducting pilot studies to determine the most eective treatment approach,ensuring long-term compliance and
operational eciency.
Beyond technical design, Tetra Tech works closely with
state and local agencies to ensure that all projects align with environmental and safety regulations, addressing
both community health concerns and water supply
sustainability. Our holistic approach combines regulatory knowledge, engineering expertise, and innovative
solutions, making us a trusted partner in California’s eorts to combat PFAS contamination.
Qualications and Experience
Florence Water Improvements Downey 4th Street Improvements Peer Review Downey Parking Structure Firestone Dry Well Improvements Sewer System Mgmt Plan Update Pangborn Drainage Analysis Well No. 11 PFAS WTP Foster Rd/Carfax Ave Storm Drain PHG Report Cost Estimates PFOA & PFOS Well Analysis Downey-Sewer 24-24 Downey-Cole Street Improvements Downey 5th Street Improvements Structural Evaluation for Downey PD The following table lists other contracts Tetra Tech has held with City of Downey within the past ve years.
Over the past ve years, Tetra Tech has completed or designed more than ten PFAS treatment facilities throughout Southern California, including multiple projects for the City of Downey.
PROJECT/LOCATION CAPACITY MGDCONTAMINANT REMOVAL TREATMENT Citywide PFAS Study for City Wells, Downey, CA 20.0 PFOA, PFOS, 1, 4-Dioxane IX, GAC, UVAOP PFAS Study & Design Well 2, Downey, CA 4.0 PFOA, PFOS IX PFAS Study & Design Well 4, Downey,CA 4.0 PFOA, PFOS IX YLWD Headquarters PFAS Plant, Placentia, CA 25.0 PFOA,PFOS IX Fullerton Main PFAS Plant, Fullerton, CA 7.2 PFOA,PFOS, TCE GAC John Garthe PFAS Plant, Santa Ana, CA 13.8 PFOA,PFOS, PFBS, PFHxS IX FullertonWells 6, 7, & 8, Fullerton, CA 5.0 PFOA,PFOS, TCE GAC PFAS Compliance Study, City of South Gate, CA 7.0 PFOA, PFOS, TCE, 1, 4-Dioxane IX, GAC, UVAOP Well 28 PFAS Treatment Systems, Orange, CA 6.5 PFOA,PFOS IX Kimberly 1A PFAS WTP, Fullerton, CA 4.3 PFOA,PFOS IX
Kimberly Wells 2 & 10 PFAS WTP, Fullerton, CA 6.5 PFOA,PFOS, PFBS, PFHxS IX Serrano Water PFAS CL “Larry” Pharris Jr Plant, Villa Park, CA 4.0 PFOA,PFOS IX Well ET-1 PFAS Study & Design, Irvine, CA 1.4 PFOA,PFOS, TCE GAC Well, SGU PFAS Study & Design, Irvine, CA 0.7 PFOA,PFOS, TCE GAC Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 CITY OF DOWNEY 4
PRINCIPAL STAFF MEMBERS EXPERIENCE AND % AVAILABILITY FOR THIS PROJECT Name & Role Relevant Project Experience Snapshot
Steve Tedesco,PE,
BCEE
Project Manager
City of Downey, Citywide PFAS Study. Project Manager for PFAS treatment, alternative evaluations, hydraulic modelling, and permitting.
City of South Gate, PFAS Compliance Study. Technical Advisor. Study to determine options to add PFAS treatment to four existing wells aected by PFOS and PFOA. Yorba Linda Water District, Headquarters PFAS Treatment Plant. Project Manager. Serrano Water District, C.L. “Larry” Pharris Jr. Filtration Plant. Project Manager. City of Fullerton, Kimberly 1A PFAS Water Treatment Plant. Project Manager.
Kara Buttacavoli, PE
Process Team Lead
City of Downey, Citywide PFAS Study. Project Engineer. City of South Gate, PFAS Compliance Study. Project Manager. Study to determine options to add PFAS treatment to four existing wells aected by PFOS and PFOA. Yorba Linda Water District, Headquarters PFAS Treatment Plant. Project Engineer. Serrano Water District, C.L. “Larry” Pharris Jr. Filtration Plant. Project Engineer. Irvine Ranch Water District, ET-1 and SGU PFAS Treatment Plants. Project Manager.
Mark Bush, PE
Conveyance Team Lead
Carlsbad Sewater Desalination Intake Pump Station, Phases 1& 2. Technical Reviewer.
Design and construction of brine dilution pumps at the existing plant with minimal production shutdown.
Lockheed Martin, North Hollywood Operable Unit Permanent Intertie Pipeline Design Services. Project Director.
Well Site Improvements, Irvine Ranch Water District. Technical Reviewer.
Crisna Raymond, PE
Civil Engineer
City of Downey, Citywide PFAS Study. Project Engineer. Yorba Linda Water District, Headquarters PFAS Treatment Plant. Project Engineer. Serrano Water District, C.L. “Larry” Pharris Jr. Filtration Plant. Project Engineer. City of Fullerton, Kimberly Well 1A WTP. Project Engineer.
Amanda Taylor, PE
Process Engineer
City of Downey, Citywide PFAS Study. Process Engineer. Yorba Linda Water District, Headquarters PFAS Treatment Plant. Process Engineer. Serrano Water District, C.L. “Larry” Pharris Jr. Filtration Plant. Process Engineer. City of Fullerton, Kimberly Well 1A WTP. Process Engineer.
Molly Lovegren, PE
Pipeline Engineer
Golden StateWater Company,Persimmon and FarnaWells PFAS.Project Engineer. City of Oxnard, Conduit Replacement and Rehabilitation. Design Engineer. Carlsbad Seawater Desalination Intake Pump Station, Phases 1& 2. Design Engineer. Lockheed Martin, North Hollywood Operable Unit Permanent Intertie Pipeline Design Services. Design Engineer.
Kyle Bohn, PE
Pump Stations
City of Oxnard, Conduit Replacement and Rehabilitation. Project Manager. City Trunk Line North Unit 2, Los Angeles Department of Water & Power. Project Engineer.
Lockheed Martin, North Hollywood Operable Unit Permanent Intertie Pipeline Design Services. Design Engineer.
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 CITY OF DOWNEY 5
TYPE & EXTENT OF SERVICES:
This study of 18 existing wells
aected by PFOS and PFOA
included analysis of water quality,
siting study, comparison of IX and
GAC treatment, evaluation of
piping wells to a central location for
treatment, capital cost estimates,
O&M estimates, and lifecycle cost
analysis. The report was used as an
attachment to the City of Downey’s
funding application to the Water
Replenishment District.
PFAS TREATMENT:
Ion Exchange
PROJECT FEATURES:
Analyzed water quality
Reviewed well pumps & motors
Analyzed centralized treatment
option
Provided site layouts
Developed capital & operations
costs
Prepared life-cycle cost analysis
for all alternatives
Analyzed life-cycle costs of treatment
at each well to centralized treatment
at one site and centralized treatment
at two sites
Analyzed life-cycle cost of future
1,4 Dioxane treatment
Prepared site plans &
process flow diagrams for all
alternatives
Built a hydraulic model of the
City water distribution system
Used the hydraulic model to
size proposed pipelines, pump
stations, & well pumps
ADDITIONAL PROJECTS:
Well No 2 PFAS Treatment Plant.
Tetra Tech designed a 1,200-GPM
PFAS treatment plant for Well No.
2, for installation and operation of
IX equipment for removal of PFOA
and PFOS from well feed water.
Well No 4 PFAS Treatment
Plant. The treatment target for
PFOS and PFOA in treated water
was nondetect (<2 ng/L). The
operational goal for water entering
the distribution system was below
the current PFOS and PFOA
notication levels of 6.5 ng/L and
5.1 ng/L, respectively. Four IX
vessels were arranged in a lead-lag
conguration as two trains. A dual-
pass conguration was selected
to meet the overall water quality
goal. Lead-vessel changeout was
initiated when a sample above
the 2.0 ng/L reporting level was
detected. Any residual PFOA or
PFOS detected between the lead
and lag vessels was adsorbed by
the lag vessel.
Reference:
City of Downey
Dan Mueller, PE
11111 Brookshire Avenue
Downey, CA 90241
[email protected]
562.904.7110
Number of Wells: 18
Capacity: 13,900 GPM
Cost: $198,700 (Fee)
Completion Date: Study completed
July 2021
Key Sta:
Steve Tedesco, PE, Project Manager
Kara Buttacavoli, PE, Project Engineer
Crisna Raymond, PE, Project Engineer
Amanda Taylor, PE, Process Engineer
Experience of Firm & Team on Similar Projects, References These images are early renderings of the proposed northern and southern treatment plant improvements.
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 CITY OF DOWNEY 6
TYPE & EXTENT OF SERVICES:
This plant includes an IX system
consisting of 11 pairs of lead/
lag vessels (22 vessels total),
bag lter pretreatment, booster
pump station, and a new on-site
generation system for chlorine
disinfection. To accommodate
the system within the existing
site, the team completed an
extensive analysis of required site
improvements.
PFAS TREATMENT:
Ion Exchange
PROJECT FEATURES:
Designed the largest PFAS IX
Treatment Plant in the U.S.
Evaluated treatment optionsat three
sites and at one combined site
Incorporated a 25.0 MGD
pump station and emergency
generators
Competed the detailed
blending analysis required for
DDW permitting
Reference:
Orange County Water District
Chris Olsen, PE
18700 Ward Street
Fountain Valley, CA 92708
[email protected]
714.378.3211
Number of Wells: 10
Capacity: 17,360 GPM (25.0 MGD)
Cost: $2.8M (Fee)
$32.5M (Construction)
Completion Date: 2022
Key Sta:
Steve Tedesco, PE, Project Manager
Kara Buttacavoli, PE, Project Engineer
Crisna Raymond, PE, Project Engineer
Amanda Taylor, PE, Process Engineer
ASCE Orange County Branch
Project of the Year 2021
ASCE Los Angeles Chapter Section
Project of the Year 2022
TYPE & EXTENT OF SERVICES:
Tetra Tech provided a
comprehensive planning document
evaluating PFAS treatment
options and other non-treatment
alternatives. The recommendations
in the study allow the City to plan,
budget, and implement water
system improvements to address
PFAS compliance for the City’s
water system.
PFAS TREATMENT:
Ion Exchange and GAC
PROJECT FEATURES:
Analyzed water quality
Reviewed well pumps & motors
Analyzed centralized treatment
option
Provided site layouts
Developed capital & operations
costs
Provided costs for 1,4-Dioxane
treatment
Reference:
City of South Gate
Chris Castillo
4244 Santa Ana Street
South Gate, CA 90280
[email protected]
323.563.5779
Number of Wells: 4
Capacity: 5,100 GPM
Cost: $165,000 (Fee)
Completion Date: 2022
Key Sta:
Steve Tedesco, PE, Principal-in-Charge
Kara Buttacavoli, PE, Project Manager
PFAS Compliance Study
SOUTH GATE, CA
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 CITY OF DOWNEY 7
TYPE & EXTENT OF SERVICES:
This project consists of a 3,000
GPM IX System with a bag-lter
pre-treatment, 3,000 GPM booster
pump station, and new chemical
feed system for disinfection.
Tetra Tech provided design and
construction services.
PFAS TREATMENT:
Ion Exchange
PROJECT FEATURES:
Online within one year of
construction start
Maximized use of local
groundwater
Designed portions of the
facility below grade to reduce
visual impacts for neighboring
properties
Second project placed into
service by OCWD PFAS program
ASCE Orange County Branch
Water Treatment Project of the Year 2020
Reference:
Orange County Water District
Benjamin Smith, PE
18700 Ward Street
Fountain Valley, CA 92708
[email protected]
714.378.3211
Number of Wells: 2
Capacity: 3,000 GPM
Cost: $824,151 (Fee)
$3.8M (Construction)
Completion Date:2022
Key Sta:
Steve Tedesco, PE, Project Manager
Kara Buttacavoli, PE, Project Engineer
Crisna Raymond, PE, Project Engineer
Amanda Taylor, PE, Process Engineer
TYPE & EXTENT OF SERVICES:
Located on a very small site with a
single well, this facility is designed
to produce 3,200 GPM using
an IX System with a bag-lter
pretreatment and a new chemical
feed system for disinfection.
Tetra Tech provided design and
construction services.
PFAS TREATMENT:
Ion Exchange
PROJECT FEATURES:
Constructed on extremely small
site
Upgraded well, pump, motor
and variable frequency drive
First OCWD project to obtain
a Division of Drinking Water
Permit
First project placed into service
by OCWD PFAS program
Reference:
Orange County Water District
Benjamin Smith, PE
18700 Ward Street
Fountain Valley, CA 92708
[email protected]
714.378.3211
Number of Wells: 1
Capacity: 3,200 GPM
Cost: $491,724 (Fee)
$1.7M (Construction)
Completion Date: 2021
Key Sta:
Steve Tedesco, PE, Project Manager
Kara Buttacavoli, PE, Project Engineer
Crisna Raymond, PE, Project Engineer
Eric Yuen, PE, SE, Structural Engineer
Amanda Taylor, PE, Process Engineer
Mazen Kassar, PE, Electrical Engineer
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 CITY OF DOWNEY 8
TYPE & EXTENT OF SERVICES:
The plant will treat six on-site wells
with a total capacity of 10,100
GPM. The GAC system will remove
PFOS, PFOA, and VOCs using 6- to
12-foot-diameter, 40,000-pound
vessels.Treated water will ow
to an existing forebay before
entering the distribution system.
The remaining wells will use an IX
system with eight vessels and bag-
lter for pre-treatment. Tetra Tech is
providing design and construction
services.
PFAS TREATMENT:
GAC
PROJECT FEATURES:
Selected GAC treatment to
address VOCs and PFAS in
groundwater
Designed facility to fit existing
operating well site
Planned layout to accommodate
future expansion
Developed 3D renderings to
help stakeholders visualize the
completed site
Reference:
Orange County Water District
Ryan Bouley, PE
18700 Ward Street
Fountain Valley, CA 92708
[email protected]
714.378.8207
Number of Wells: 6
Capacity: 9,400 GPM
Cost: $1.1M (Fee)
$11.3M (Construction)
Completion Date: Under Construction
Key Sta:
Steve Tedesco, PE, Project Manager
Kara Buttacavoli, PE, Project Engineer
Victor Ramirez, PE, SE, Structural
Crisna Raymond, PE, Project Engineer
Eric Yuen, PE, SE, Structural Engineer
Amanda Taylor, PE, Process Engineer
Mazen Kassar, PE, Electrical Engineer
TYPE & EXTENT OF SERVICES:
ET-1 was developed to increase
use of the Irvine Subbasin by
recovering and treating VOC-
impaired groundwater. The facility
uses GAC and air stripping to treat
groundwater extracted from within
the VOC plume. Treated water is
used for nonpotable purposes.
PFAS TREATMENT:
GAC
PROJECT FEATURES:
Selected GAC to address VOCs
and PFAS in groundwater
Designed the facility to fit within
an active well site
Planned the layout to
accommodate future expansion
Coordinated City permitting for
the piping connection
Reference:
Irvine Ranch Water District
Paul Cook
15600 Sand Canyon Ave
Irvine, CA 92618
949.453.5500
[email protected]
Number of Wells: 1
Capacity: 1,100 GPM
Cost: $19,870 (Study); $658,598
(Design); $3M (Construction)
Completion Date: 2025
Key Sta: Steve Tedesco, PE, Engineer-of-Record
Kara Buttacavoli, PE, Lead Project
Engineer
Crisna Raymond, PE, Project Engineer
Eric Yuen, PE, SE, Structural Engineer
Amanda Taylor, PE, Process Engineer
Mazen Kassar, PE, Project Engineer
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 CITY OF DOWNEY 9
TYPE & EXTENT OF SERVICES:
Tetra Tech is providing design
and construction support for the
District’s 12 shallow wells at the
former El Toro Marine Base, where
groundwater contains elevated
VOC levels and PFAS. The design
included GAC treatment, and
the replacement of the existing
air stripper system, along with
city permitting for the requried
pipeline.
PFAS TREATMENT:
GAC
PROJECT FEATURES:
Selected GAC to address
elevated VOC concentrations
and PFAS in groundwater
Replaced the existing air stripper
system
Designed the facility on the
former El Toro Marine Base site
Coordinated city permitting for
the required pipeline
Reference:
Irvine Ranch Water District
Paul Cook
15600 Sand Canyon Ave
Irvine, CA 92618
949.453.5500
[email protected]
Number of Wells: 12 Shallow Wells
Capacity: 600 GPM
Cost: $347,992 (Fee)
$2.9M (Construction)
Completion Date: 2025
Key Sta:
Steve Tedesco, PE, Principal-in-Charge
Kara Buttacavoli, PE, Project Manager
Eric Yuen, PE, SE, Structural Engineer
Amanda Taylor, PE, Process Engineer
Mazen Kassar, PE, Senior Engineer
TYPE & EXTENT OF SERVICES:
Tetra Tech is designing demolition
of the existing well and construction
of Well No. 29 and an associated
PFAS treatment system. The new
well will produce 3,000 GPM, and
the treatment system will treat up to
4,500 GPM. Facilities will include
a wellhead enclosure, a combined
chlorination and electrical building,
and an external roll-up generator
connectionforbackuppower.The
site also includes building and land-
scaping design, paving, and fencing.
PFAS TREATMENT:
Ion Exchange
PROJECT FEATURES:
Designed demolition of Well No. 8
Designed drilling and equipping
of Well No. 29
Specifieda3,000-GPMvertical
turbine pump, mechanical
piping, and sound enclosure
Designed on-site piping ranging
from 4 to 16 inches in diameter
Incorporated a concrete masonry
electrical and chemical storage
building
Reference:
City of Orange
Tuan Cao, PE
189 S. Water Street
Orange, CA 92866
[email protected]
714.288.2492
Number of Wells: 2
Capacity: 4,500 GPM
Cost: $746,000 (Fee)
Completion Date: Ongoing
Key Sta:
Steve Tedesco, PE, Technical Advisor
Mazen Kassar, PE, Electrical Engineer
Well 28 PFAS Treatment Systems
ORANGE, CA
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 CITY OF DOWNEY 10
Project Approach & Understanding
PROJECT MANAGEMENT
Tetra Tech fully understands the importance of this project to the City of Downey and our team has developed a plan and an approach that will complete your project in the
most expeditious manner possible.
We have dedicated over 30 sta members (95 percent
ofwhomarelocal)toworkonthisproject.Theywillbe
organized as a single team with key sta members from
various disciplines (civil, process/mechanical, structural, electrical, I&C, water quality, and 3D CADD) under the
direction of our project manager, Steve Tedesco, PE, BCEE.
This approach will allow our team to have multiple
disciplines working at the same time on the Northerly
Treatment Plant, Southerly Treatment Plant, supply
pipelines, and treated water pipelines.
Our team will also be supported by a pool of 15 additional sta members, to provide both technical and production
assistance. These team members will work on layouts,
designs, specications, details, and control descriptions that are common to PFAS projects.
Steve will meet bi-weekly with the City to review progress and resolve any issues.At these meetings,our team will
roll out the latest plans, review the design, and solicit input. In this manner we expect to have most issues
resolved before our submittals, allowing for review
periods to be shortened to two to three weeks per
submittal.
Tetra Tech will develop and maintain a project
management plan (PMP) to ensure successful execution
of the project. The draft PMP will be submitted within 15 daysofprojectaward,andthe nalPMPwillbesubmitted
within ve days of receiving the City’s draft comments.
The purpose of the PMP is to clearly dene Tetra Tech’s approach, personnel, resources, project schedule, and
milestones in executing and managing scope, schedule,
cost, and to comply with the requirements of the project.
We propose a concise document organized as follows:
Project management organization
Key personnel roles and responsibilities
Project scope, work breakdown structure (WBS),
and technical approach that denes activities and
milestones
Detailed activity-based schedule (organized
consistently with the WBS)
A plan to keep the City up-to-date on the project
Additionally, our team will also prepare a comprehensive, project-specic Quality Control/ Quality Assurance (QA/ QC) Plan (discussed later in this section) that will be used to ensure that each submittal meets or exceeds the City’s requirements. Our goal is to provide high-level product and services that the City is accustomed to and deserves.
On a monthly basis, Tetra Tech will
establish and maintain a repository of
project-related information to ensure
pertinent documentation and data
are available for project reviews,
monthly reports, and to provide a
clear record of the project findings to
support the final design.
3D MODELING CAPABILITIES
Our 3D Models will be used in a virtual reality platform that enables operators, managers, and engineers to walk through our design. This allows you to better understand the design and to make sure that the plant can be safely and eciently operated.
To the right is a photograph of one of the operators of the 25 MGD Yorba Linda Water District Plant performing a
virtual visit to the recently completed design.
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 CITY OF DOWNEY 11
Technical Approach
DATA REVIEW
Our team will review all current and relevant information on the proposed treatment sites so we can determine the best way to treat the aected wells and cost-eectively get the treated water into the distribution system.
PREPURCHASING VESSELS
Pre-purchasing vessels for the
project can result in signicant
time savings for the project.
The current lead time to obtain
vessels is approximately 24-30
weeks. It is critical that our design
teams incorporate the pre-
purchased vessels correctly into
our construction bid packages.
Tetra Tech has done this in the
past on several IX projects. To take
full advantage of the time saved
through pre- purchased vessels, we
recommend:
Designing the concrete slab as a
single mat foundation to hold all
vessels, piping, pipe racks, drain
system, and conduits
Designing the slab with no pipe or
conduit penetrations; this will allow
slab work to begin as soon as the
construction contract is approved
SITE LAYOUT
We recommend incorporating the
following features:
Provide sucient access and
maneuvering space for tanker
trucks to remove spent IX media
and deliver replacement media
Use 5-micron pretreatment lters
to protect the IX media from ne sediment carried by
wells and pipelines
Install a tank-slab drainage and containment system
to collect rainfall runo and leaks, alert operators, and prevent o-site discharge
Replace rupture disks with pressure-relief
valves equipped with limit switches to signal
overpressurization and initiate well shutdown
Design late-pour pockets to simplify vessel and anchor- bolt installation and accommodate eld tolerances
TANKANDVESSELANCHORAGE
Current anchorage code provisions for tanks and vessels (found in Chapter 15 of ASCE 7-16 and Chapter 17 of ACI 318) require that anchor bolts be designed to avoid brittle failures of the surrounding concrete.
Specically, these provisions ensure that the concrete
at anchor bolt locations is signicantly stronger than the anchor bolts themselves, preventing catastrophic failure.
Due to these requirements, post-
installed anchors, which lack sucient
bond strength, are generally unsuitable.
Instead, cast-in-place anchors are
mandated for these applications.
However, cast-in- place anchors
introduce challenges: they are dicult to
position accurately, increasing both the
time and cost of construction. For each
tank or vessel, full-size templates are
required to locate anchors precisely, and
these templates must be positioned by
surveyors and xed securely to prevent
shifting during the concrete pour.
Despite these challenges, code
compliance can be achieved with the
convenience of post-installed anchors
by utilizing a method called “late pour
pockets” at each tank leg.
Please refer to the sketches on
this page for a typical layout and
section of the late pour pockets. In
this approach, formwork blocks out
a small portion of the foundation
around each anchor location during
the main foundation pour. These
pockets remain unlled, allowing for
the post-installation of anchors once
the main foundation is complete.
REVIEW OF WATER QUALITY
Tetra Tech will perform a detailed review of the water
quality for each well. In addition to PFAS compounds
found in the wells, it is critical to review other
contaminants in the wells.
Other inorganic contaminants that can aect IX treatment processes include:
Nitrate
Sulfate
Alkalinity
Iron
Manganese
Turbidity
Suspended Solids
Total Organic Carbon
(TOC)
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 CITY OF DOWNEY 12
Nitrate, sulfate, and TOC can compete with IX resin
adsorption, reducing the bed life. Iron, manganese,
high turbidity, and high suspended solids can cause
clogging and channeling in resins and medias. Complete
water quality data from the past three to ve years will be reviewed to nalize any recommendations based on feed
water quality.
PILOT TESTING OPTIONS
Full Scale Pilot
Full-scale pilot testing provides the most accurate data when predicting media adsorption by IX media. However,
this can be expensive and time-consuming, because it:
Requires on-site power, water, and waste discharge
facilities at the wellheads
Well’s pumping rate should be close to the production
rate to obtain a representative water quality
A full-scale pilot operates until breakthrough occurs,
which can take more than 12 months when IX is used to
remove PFAS from groundwater. Similar durations have
been observed during pilot testing at other Southern
California sites.
Pilot testing by the Water Replenishment District (WRD) and Orange County Water District (OCWD), including
OCWD’s test at the non potable Bessie Well in Anaheim,
demonstrated that multiple IX resins can eectively
remove PFAS containments.
Rapid Small-Scale Column Testing
Rapid small-scale column test (RSSCT) is an eective
and cost-ecient way to compare IX media options and
determine the most eective media type for a given
site and water quality. An RSSCT is most eective at
demonstrating that an IX media will adsorb/ remove a
pollutant in a specic water, and which type of IX media is most eective. An RSSCT IX resin should conform to
the standards listed in ASTM-D6586: Standard Practice
for the Prediction of Contaminant Adsorption. The RSSCT typically requires 6-8 weeks for performance testing and is signicantly less expensive than a full-scale pilot test.
Use of Previously Completed Pilot Reports
Tetra Tech recommends using completed WRD
pilot data and media-supplier modeling rather than
conducting a new full-scale pilot or RSSCT, subject to
DDW concurrence. This approach can reduce cost and
schedule while providing the performance data needed
for regulatory review.
Tetra Tech has already designed and placed four Orange
County treatment plants into service based on pilot
testing conducted at a single Anaheim well. We applied
a similar approach for Bell Gardens Well No.1. As shown in the table on the following page, Tetra Tech compared six key organic and inorganic water quality parameters for Bell Gardens Well No. 1 with data from WRD and other
Los Angeles County PFAS pilot sites. Comparable nitrate, sulfate, alkalinity, and other water quality conditions demonstrated that the existing pilot results were
applicable to Bell Gardens.
After meeting with DDW to review this comparison, Bell
Gardens was allowed to proceed without additional
pilot or RSSCT testing, provided that media suppliers
submitted modeling demonstrating PFAS removal to
applicable regulatory levels and acceptable media life.
Tetra Tech anticipates that Downey may also be able to use existing pilot data and media-supplier modeling in place of new pilot or RSSCT testing, subject to conrmation of comparablewaterqualityandDDWconcurrence.
Tetra Tech used the table on the following page to
compare key organic and inorganic water quality
data for Bell Garden’s Well No. 1 with data from
WRD and other Los Angeles County PFAS pilot tests.
Nitrate, sulfate, and alkalinity concentrationsare
comparable, supporting IX as a suitable treatment
approach for Bell Gardens Well No. 1.
PRELIMINARY TREATMENT SIZING
The PFAS treatment system developed during the
Citywide PFAS Study was sized based on the minimum
empty bed contact time (EBCT) required for adsorption
and the vessel’s allowable super cial velocity, or hydraulic loading rate. IX treatment is typically congured in two- vessel trains, with one vessel serving as the lead and the second serving as the lag.
Standard two-vessel IX trains are commercially available with 12-foot-diameter vessels.Because IX resin produces relatively high head loss per foot of bed depth, many
facilities limit resin depth to approximately 3.7 feet per vessel, which constrains treatment capacity.
For the same vessel size, GAC capacity is lower because GAC requires a longer EBCT—typically 15 minutes.
Therefore, GAC systems require more or larger vessels
than IX systems, increasing capital cost. Tetra Tech
evaluated the life-cycle costs of GAC and IX alternatives during the Citywide PFAS Study.
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28- 13 -TETRA TECHCITY OF DOWNEYWater Quality Analysis Used to Justify Eliminating Pilot and Bench Testing Description Bell GardensWRD PilotPicoWaterDistrictPico Water DistrictUnits Well #1LHHCWD Well #10MTBLW Well #7Well 11 Pilot Well 2 Well 12 Well 4Well 5Test Type Vendor Model Projections Full Scale PilotPartial Pilot (to 25%)RSSCT RSSCT RSSCTGAC / Resin Tested IX: Evoqua PSR2+. Calgon Cal Res 2301, Purolite PFA694EGAC: Calgon F400, AV1240CB, AV1240LDX, AV1240PFASPurolite PFA694E IX ResinGAC: Calgon F400, Evoqua AV1240LDIX: Evoqua PSR2+, Calgon CalRes 2301Sulfatemg/L 73.0174.0 77.5110.0 89.091.0 58.0 61.0Nitrate (as N)mg/L as N2.0 2.82.5 2.52.00 4.60 1.202.40Alkalinity (as CaCO3) mg/L130.0 200.0 168.0180.0 170.0 140.0110.0 110.0Chloridemg/L 47.0107.0 51.176.0 Fluorideppb 0.3 ND Arsenicppb 2.23.0 2.01.8 Calciummg/L 49.0109.0 65.090.2 68.060.0 40.0 43.0Ironug/L ND ND11.0 NDND 0.0 NDManganeseug/L ND 3.05.1 ND4.9 ND NDSodiummg/L 45.069.0 54.056.0 Potassiummg/L 3.35.0 4.04.7 Magnesiummg/L 8.721.0 13.04.0 11.014.0 7.7 9.8pHUnits 7.6 7.5 7.36.5 6.6 6.5TDSmg/L 320.0643.0 410.0520.0 Total Organic Carbon TOC mg/L 0.77 0.810.5 1.51.7 0.6 0.5Peruoro hexanoic acid PFHxA ng/L (ppt) 10.03.4 5.15.6 ND12.0 9.2 12.0Peruorodecanoic acid PFDA ng/L (ppt)1.8 2.0 2.5 ND 5.8NDPeruoro heptanoic acid PFHpA ng/L (ppt) 6.72.2 3.73.0 ND2.6 4.1 4.5Peruoro octanoic acid PFOA ng/L (ppt) 15.012.4 15.012.0 9.711.0 13.0 13.0Peruoro nonanoic acid PFNA ng/L (ppt) 3.33.0 3.62.1 3.2ND 3.2 2.8Peruoro butane sulfonic acid PFBS ng/L (ppt) 6.36.3 9.05.6 9.09.5 6.6 7.1Peruoro hexane sulfonic acid PFHxS ng/L (ppt) 5.46.4 6.64.0 5.54.1 4.3 3.4Peruoro octane sulfonic acid PFOS ng/L (ppt) 37.032.2 35.722.0 140.013.0 35.0 18.0Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 CITY OF DOWNEY 14
PERMITTING
Tetra Tech sta are very familiar with the local, state, and federal permitting required for this project. From our experience, the most critical permit is the approval of the California DDW. We have obtained over ten PFAS plant approvals from DDW in the last ve years. Our team will meet early and often with DDW to ensure that they are onboard with the project and that we understand exactly what DDW needs to approve the permit to operate.
We have included the following permitting services in our budget:
Engineer’s report
Pilot pipe study
Water quality blending plan for each treatment site
Comparison study evaluating whether completed WRD pilot data can replace new pilot or RSSCT testing, potentially reducing schedule and cost Operations, Monitoring, and Maintenance Plan (OMMP)
Water treatment plant and distribution system disinfection plan Working closely with the City operators, we will ensure that all these plans have been properly reviewed and can be implemented in time to meet the project schedule.
Scope of Work
NORTHERLY WATER SUPPLY TREATMENT
IMPROVEMENTS
The northern treatment plant will serviceWell Nos.2,
4, 7, 8, 10, 14, 17, and 18. Note: Well No. 9 was recently destroyed and is no longer included. The improvements
are to include but not be limited to the following:
• Northerly water treatment plant and associated
facilities including onsite piping, booster pump station, chemical enclosures/storage, and all necessary utility
improvements to properly equip, activate, and operate
the treatment plant
• SCADA Improvements to replace existing SCADA
software and hardware at Utilities Yard, well sites, and emergency interconnections and to accommodate
treatment facilities
• Associated water pipeline improvements
• Upgrades to the northwesterly well sites to
accommodate the treatment plant and pipeline
improvements including but not limited to well pump
and motor rehabilitation and SCADA connectivity to the
treatment plant
• Perimeter wall, power gates, site security, and lighting improvements
• Automatic backup power generation
• Permitting – State, local, and CEQA/NEPA
• Perimeter/site landscaping and irrigation improvements • Site Low Impact Development (LID) improvements
SOUTHERLY WATER SUPPLY TREATMENT
IMPROVEMENTS
Text The southern plant will service Well Nos. 11, 12,
15, 16, 19, 23, 24, 25, 29, and 30. Note: southerly plant improvements should also be designed to accommodate
installation of future groundwater wells (Well No. 27 to be located at 7926 Springer Street and Well No.28 to
be located at the Utilities Yard). The improvements are to include but not be limited to the following:
• Southerly water treatment plant and associated
facilities including onsite piping, booster pump station, chemical enclosures/storage, and all necessary utility
improvements to properly equip, activate, and operate
the treatment plant
• Abandonment/removal of existing booster pump
station
• Seismic retrot improvements to existing 5 million
gallon (MG) at grade and below grade tank
• SCADA Improvements to replace existing SCADA
software and hardware at Utilities Yard, well sites, and emergency interconnections and to accommodate
treatment facilities
• Associated water pipeline improvements
• Upgrades to the southeasterly well sites to
accommodate the treatment plant and pipeline
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 CITY OF DOWNEY 15
improvements including but not limited to well pump
and motor rehabilitation and SCADA connectivity to the
treatment plant
• Perimeter wall, power gates, site security, and lighting improvements
• Automatic backup power generation
• Permitting – State, local, and CEQA/NEPA
• Perimeter/site landscaping and irrigation improvements • Removal of existing and installation of new Utilities Yard backll materials storage enclosure(s) with overhead
coverage
• Removal/abandonment of existing and installation of
new vehicle wash station including installation of new
clarier and sewer lateral connection to existing City
sewer main
• Repaving of entire Utilities Yard site including any
necessary site drainage and LID improvements
TASK NO. 1 – PROJECT MANAGEMENT
Tetra Tech will perform the following tasks:
1.1 Following Notice-to-Proceed, attend a kick-o meeting with City representatives to review the project in detail and to determine specic requirements regarding the project design criteria. In addition, Tetra Tech will prepare a Project Management Plan (PMP) and Quality Control/Quality
Assurance Plan (QA/QC Plan) for City review.
1.2 Maintain communication with the City’s Project
Engineer and operations sta throughout the duration
of the project, including bi-weekly meetings to review
preliminary plans as well as project status at 60%, 90%, and 100% design levels.
1.3 Prepare meeting agendas and minutes serving as a
communication record and listing any required follow-
up actions. Agendas will be provided two days before
meetings, and minutes will be provided within one week
after the meeting.
1.4 Prepare and provide a detailed project schedule with updates monthly.
1.5 Remain cognizant of the status of each task as it
proceeds and expeditiously resolve any issues that may
impede progress.
1.6 Proactively initiate communications with the City
to address issues in a timely fashion and bring any
potentially complex project issues to the attention of the Project Manager as quickly as possible.
1.7 Coordinate project development and approvals with
the City.
1.8 Implement the QA/QC plan for the project. This task will include maintaining organization and communication over the entire project team, cost and schedule
monitoring, and performing a constructability review of the project plans and estimate upon project completion.
Tetra Tech has included as part of our team independent technical reviewers and a construction contractor to
provide QA/QC reviews.
TASK NO. 2 – UTILITY SEARCH, RESEARCH,
SURVEYING, AND GEOTECHNICAL ANALYSIS
2.1 Attend a preliminary design meeting with City sta
to review project scope. Coordinate design schedule
and nalize the City’s design criteria and parameters that will be incorporated into the project. As the need arises, attend additional meetings as necessary.
2.2 Research all available City records and documents
including, but not limited to, existing improvement
plans, maps, analyses, “As-Built” drawings, utility plans, hydraulic models, grant applications, and other pertinent information necessary for said project.
2.3 Conduct a detailed utility search within project limits.
Send Utility Notices (preliminary and nal) to all utility companies with facilities located within the project limits.
Identify possibleconicts and incorporate into design as appropriate.Include all utilities on the project base plans.
Verify all utilities in the eld to ensure that they are shown correctly on the plans. Tetra Tech will also coordinate with the utility companies/agencies in the event of any conicts or necessary relocations or if new services are needed. If necessary, Tetra Tech will pothole any utilities needed to determine the depth and to verify the location of the facility.
2.4 Tetra Tech will coordinate permitting through all
necessary federal, state, and local agencies, including but not limited to: State Water Resources Control Board DDW, Los Angeles Regional Water Quality Control
Board, Los Angeles County Flood Control District
(LACFCD), Sanitation Districts of Los Angeles County,
Southern California Edison (SCE), Southern California Gas Company, South Coast Air Quality Management District
(SCAQMD), California Air Resources Board (CARB), and
City of Downey Building and Safety, Planning, and Public Works. City will pay for all permitting and plan check fees associated with project.
2.5 Establish horizontal controls and perform a ground
survey of all surface features to create the topographic mapping of the area from right-of-way to right-of-way.
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 CITY OF DOWNEY 16
Capture all existing utility information during survey and import such information into the base map les. The base drawing will include all underground utilities, surface features, visible surface utilities (manholes, water valves, re hydrants, catch basins, utility boxes, utility poles, overhead utilities, guy wires, vaults, etc.) curb/gutters, driveways, sidewalks, curb ramps, easements, centerline, and right- of-way lines. Our subconsultant for this project, Metz
Engineering,hassurveyedseveralofthestreetswherethe
proposed pipelines will be located. They will use this data to expedite the design survey and save costs.
2.6 Provide a plan for potholing necessary to capture
critical horizontal/vertical information of existing utilities to properly construct improvements. Assume to perform
one hundred seventy-ve (175) potholes. Tetra Tech
has provided a unit price for any additional potholes
required. Any utility potholing or surveying requiring
sidewalk or lane closures will require a no-fee permit from the City. In addition, trac control must be provided in accordance with the WATCH Manual.
2.7 Provide a geotechnical analysis/evaluation of
subsurface at treatment plant sites and pipeline
alignments as necessary to design and construct the
proposed water supply treatment and associated
pipeline improvements. The following subsurface
investigations will be provided:
a) Northerly Treatment Plant: 1 boring and 1 CPT to
50 feet deep, and 1 boring to 20 feet deep
b) South Treatment Plant: 1 boring and 1 CPT to 50
feet deep and 2 borings to 20 feet deep
c) Pipeline: 34 borings to 10 feet deep
TASK NO. 3 – PRELIMINARY 60% DESIGN
3.1 Design and prepare construction plans in AutoCAD.
Such work will include all necessary civil, structural, mechanical, electrical, instrumentation, and other
analyses and designs, including any necessary hydraulic modeling scenarios as necessary to conrm pipeline
sizes. Unless otherwise indicated, pipeline plans will be prepared at 40 scale and treatment plant site plans at 20 scale. Separate standalone plan sets will be prepared for each of the projects and will include the following:
A. Title Sheet
B. General notes
C. Water supply treatment plant and associated site
improvements – plans and proles
D. Water pipeline plans and proles
E. Details and standard drawings
3.2 Plans will t 24” x 36” City of Downey standard “Title Block” sheet.
3.3 Plans and prole sheets will be prepared at a scale of 1” = 40’ horizontal and 1” = 4’ vertical.
3.4 Submit electronic version of the construction plans (24” x 36” PDF).
TASK NO. 4 – PILOT PIPE STUDY
City does not currently treat or disinfect its groundwater supply yet meets all present state and federal water
quality standards. Given the present lack of disinfectant in the City’s water supply system, Tetra Tech will prepare a pilot pipe study to include but not be limited to a ow- through pipe loop study and corrosion coupon testing
for copper and lead as provided in System Wide PFAS
Analysis Report.
TASK NO. 5 – 90% PLANS AND ENGINEER’S
ESTIMATESUBMITTAL
Tetra Tech will submit progress copies of the plans and engineer’s estimate for City approval at 90% completion level, as follows:
Electronic version of the construction plans (24” x 36” PDF).
One (1) set of the engineer’s estimate on 8 ½” x 11”
sheets including electronic version (PDF and MS Excel
“.xls” le).
TASK NO. 6 – FINAL 100% PLANS AND
ENGINEER’S ESTIMATE SUBMITTAL
Submit nal plans and engineer’s estimate as follows:
A. Plans
Electronic version of the construction plans (24” x 36” PDF) suitable for reproduction by the City.
Digital copyof AutoCAD “.dwg” le(s) with all associated references. As-Design plans will be in AutoCAD 2026
format and suitable for immediate integration (e.g.
geocoding) into the City’s existing GIS system.
B. Specications (Special Conditions Section)
Digital copy of the specications (special conditions
section) (MS Word “.doc” le).
C. Engineer’s Estimate
Contract line items, quantities based on plan takeo,
unit prices based on current industry construction
prices, and total project amount.
Digital copy of the engineer’s estimate, including copies of all backup calculations (PDF and MS Excel “.xls” le).
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 CITY OF DOWNEY 17
TASK NO. 7 – WATER TREATMENT PLANT AND
DISTRIBUTION SYSTEM DISINFECTION AND
MONITORING PLAN
Tetra Tech will prepare a water treatment plant and
distribution system disinfection and monitoring plan
for both sites, and the City water distribution system, as necessary, due to implementation of the water supply
treatment systems.
TASK NO. 8 – CEQA/NEPA ENVIRONMENTAL
COMPLIANCE AND PUBLIC OUTREACH
Tetra Tech will provide all services necessary for
completion of CEQA and NEPA environmental
compliance. Assume CEQA environmental review will rely
on an Initial Study (IS)/Mitigated Negative Declaration (MND) prepared with the City as lead agency. Prepare
and complete all NEPA environmental requirements as
required by the State Water Resources Control Board
Emerging Contaminant (EC) and State Revolving Fund
(SRF) Loan Application and Agreement requirements.
Tetra Tech will attend the City Council meeting where the CEQA/NEPA document is adopted, upon City request.
Tetra Tech will also prepare for, attend, and present
projects during one public outreach/workshop event.
TASK NO. 9 – STATE WATER RESOURCES
CONTROL BOARD EMERGING CONTAMINANT
EC AND STATE REVOLVING FUND SRF LOAN
APPLICATION SUPPORT AND ASSISTANCE
General Information application packages have already
been submitted by the City for each of the Northerly
Water Supply Treatment Improvements and Southerly
Water Supply Treatment Improvements projects. Tetra
Tech will support and assist the City with all other
remaining application (Technical Application and
Environmental Application Packages) requirements,
including but not limited to, plans, specications,
and completion of CEQA/NEPA documentation/
requirements.
TASK NO. 10 – ASBUILT/RECORD DRAWINGS
AND CONSTRUCTION ENGINEERING SUPPORT
Tetra Tech will prepare as-built/record drawings based
on redlined drawings to be furnished by the City/
Contractor upon the completion of construction. Submit
as-built plans to City on Mylar and in digital format as required (PDF, AutoCAD “.dwg” le(s) with all associated references). As-built plans will be in AutoCAD format and suitable for immediate integration (e.g. geocoding) into the City’s existing GIS system.
Tetra Tech will provide construction and post construction engineering assistance to the City, including but not
limited to, review of material submittals, responding to requests for information (RFIs), eld design changes/
modications, treatment plant start up, and activation.
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 CITY OF DOWNEY 18
Quality Control & Quality Assurance
Tetra Tech has a mandatory quality assurance and quality control (QA/QC) program for all projects. Our QA/QC
program for this project will be led by Project Manager Steve Tedesco and supported by our QA/QC Team. We
maintain this program based on the concept of continually improving quality by:
Identifying and resolving problems so they do not re-
occur
Identifying and eliminating ineciency and waste
Reducing variability
Increasing performance
All deliverables, whether draft or nal, undergo a
formal review process prior to submittal.
This QA/QC process covers all aspects of project delivery and integrates with project management processes so
that quality is maintained throughout the development of each deliverable. Our quality plan will be included in our deliverables at the 60-, 90- and the 100 percent design submittals.
QA/QC activities are identied during project planning
and applied throughout the project life.QAactivities
help guide the project work based on professional
and regulatory standards. QC activities occur at key
milestones to conrm project quality. Continuous
improvement is achieved on the projectby applying these QA/QC activities and on future projects by applying
lessons learned.
Our stringent quality approach allows our team
to identify issues early and implement
a corrective action plan to resolve
discrepancies with minimal impact
to the project. During the 60-,
and 90-percent submittal
reviews if an issue arises
we will work with the City
of Downey to develop a
solution, implement the
solution and then follow-
up to ensure the issue
is resolved and provide
closure so the project
can continue to progress
forward. If requested, QA/
QC documentation will be
provided to the City after each
milestone so there is a record of
all activities and buy in from each
discipline, as well as from the City.
DEVELOPMENT AND IMPLEMENTATION
OF QA/QC PLAN
Our process and procedures will be reviewed and
approved by the City, specic to the details and
requirements of this project. Modications will be made as necessary to meet the QA/QC requirements of each
individual task.
INDEPENDENT REVIEW AND VERIFICATION
Our assigned QA/QC team, independent of the project
design team, will perform in-process reviews and signo on all project deliverables prior to submittal to the City.
WORKINPROCESS INSPECTION
Project documents will be reviewed throughout the
design process and before each scheduled submittal of
design documents. Steve will implement QC reviews in
which technical leads will meet to review the in-progress documents, maintain discipline coordination, and make
certain that technical requirements are met.
COMMUNICATION WITH THE CLIENT
Project quality and change issue updates will take place between our project manager, Steve, and the City’s
project manager in accordance with the approved QA/
QC plan.
SUBCONSULTANT
COMMITMENT
Our subconsultants will be
required to employ similar
quality review processes
for their deliverables.
Tetra Tech will verify that
each subconsultant has
followed the QC plan for
your project.
Scoping
Cost/ScheduleControls
QA/QCPlan
CommunicationsCommunity&Sustainability
Health&Safety
ProjectCloseout/Catalog
TETRATECH’S
QA/QC
PROGRAM
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28- 19 -TETRA TECHCITY OF DOWNEYScheduleTask NameDuration Start FinishNotice to Proceed0 daysThu 7/30/26Thu 7/30/26Task 1 - Project Management365 daysThu 7/30/26Wed 12/22/271.1 Kick-off Meeting0 daysThu 7/30/26Thu 7/30/261.2 Bi-weekly Meetings365 daysThu 7/30/26Wed 12/22/271.3 Meetings & Agenda365 daysThu 7/30/26Wed 12/22/271.4 Monthly Schedule365 daysThu 7/30/26Wed 12/22/271.5 Task status & resolve issues365 daysThu 7/30/26Wed 12/22/271.6 Proactive Comunications365 daysThu 7/30/26Wed 12/22/271.7 Coordinate project development & approval365 daysThu 7/30/26Wed 12/22/271.8 Implement QA/QC Plan20 daysThu 7/30/26Wed 8/26/26Task 2 - Utility Search, Research, Survey, Geotechnical Reports65 daysThu 7/30/26Wed 10/28/262.1 Preliminary Design Meeting0 daysThu 7/30/26Thu 7/30/262.2 Research all available data15 daysThu 7/30/26Wed 8/19/262.3 Perform utility search20 daysThu 7/30/26Wed 8/26/262.4 Coordinate permitting20 daysThu 7/30/26Wed 8/26/262.5 Survey & Mapping30 daysThu 7/30/26Wed 9/9/262.6 Potholing (175 Potholes)40 daysThu 8/20/26Wed 10/14/262.7 Prepare Geotechical Reprot40 daysThu 8/20/26Wed 10/14/26City of Downey Review10 daysThu 10/15/26Wed 10/28/26Task 3 - Preliminary (60%) Design170 daysThu 7/30/26Wed 3/24/27Task 3 - Preliminary (60%) Design65 daysThu 7/30/26Wed 10/28/263.1 Prepare 60% Design Plans60 daysThu 7/30/26Wed 10/21/26City of Downey Review5 daysThu 10/22/26Wed 10/28/26Task 4 - Pilot Pipe Study65 daysThu 7/30/26Wed 10/28/264.1 Pilot Plant Plan5 daysThu 7/30/26Wed 8/5/264.2 Assemble pipe loop with City staff5 daysThu 8/6/26Wed 8/12/264.3 Run pilot loop & take sample20 daysThu 8/13/26Wed 9/9/264.4 Lab Testing20 daysThu 8/13/26Wed 9/9/264.5 Draft Report10 daysThu 9/10/26Wed 9/23/264.6 Respond to comments5 daysThu 9/24/26Wed 9/30/264.7 Final Report10 daysThu 10/1/26Wed 10/14/26City of Downey Review10 daysThu 10/15/26Wed 10/28/26Task 5 - 90% Plans & Engineer's Estimate50 daysThu 10/29/26Wed 1/6/275.1 Prepare 90% Design Plans30 daysThu 10/29/26Wed 12/9/265.2 Engineer's Estimate5 daysThu 12/10/26Wed 12/16/26City of Downey Review15 daysThu 12/17/26Wed 1/6/27Task 6 - Final (100%) Plans, Specification, & Estimate55 daysThu 1/7/27Wed 3/24/276.1 Prepare Final Design Plans15 daysThu 1/7/27Wed 1/27/276.2 Final Specifications & Bid Documents15 daysThu 1/7/27Wed 1/27/276.3 Engineer's Estimate10 daysThu 1/7/27Wed 1/20/27City of Downey Review10 daysThu 1/28/27Wed 2/10/27Award Construction Contracts30 daysThu 2/11/27Wed 3/24/27Task 7 - Distribution System Disinfection & Monitoring Plan20 daysThu 1/7/27Wed 2/3/277.1 Prepare draft plan for review10 daysThu 1/7/27Wed 1/20/277.2 Respond to comments5 daysThu 1/21/27Wed 1/27/277.3 Prepare Final Plan5 daysThu 1/28/27Wed 2/3/27Task 8 - CEQA/NEPA Compliance & Public Outreach60 daysThu 10/22/26Wed 1/13/278.1 Prepare Draft CEQA/NEPA20 daysThu 10/22/26Wed 11/18/26City of Downey Review10 daysThu 11/19/26Wed 12/2/268.2 Address comments10 daysThu 12/3/26Wed 12/16/268.3 Attend Public Outreach Meetings20 daysThu 11/19/26Wed 12/16/268.4 Prepare Final CEQA/NEPA Plans20 daysThu 12/17/26Wed 1/13/27Task 9 - Funding Assistance60 daysThu 10/22/26Wed 1/13/279.1 Assist with State Board application15 daysThu 10/22/26Wed 11/11/269.2 Prepare required documents45 daysThu 11/12/26Wed 1/13/27Task 10 - As-Built drawings & Construction EngineeringSupport505 daysThu 3/25/27Wed 2/28/2910.1 Review Shop Drawings480 daysThu 3/25/27Wed 1/24/2910.2 Respond to RFIs480 daysThu 3/25/27Wed 1/24/2910.3 Design Clarifications480 daysThu 3/25/27Wed 1/24/2910.4 Site Visits480 daysThu 3/25/27Wed 1/24/2910.5 Prepare Plan Revisions480 daysThu 3/25/27Wed 1/24/2910.6 Startup & Testing25 daysThu 1/25/29Wed 2/28/2910.7 Prepare Record Drawings20 daysThu 1/25/29Wed 2/21/29Final Completion0 daysWed 2/28/29Wed 2/28/297/30Notice toProceed7/301.1 Kick-offMeeting1.2Bi-weeklyMeetings1.3 Meetings & Agenda1.4 MonthlySchedule1.5 Taskstatus & resolveissues1.6ProactiveComunications1.7 Coordinateproject development & approval1.8 Implement QA/QC Plan7/302.1 PreliminaryDesign Meeting2.2 Researchallavailabledata2.3 Perform utilitysearch2.4Coordinatepermitting2.5 Survey& Mapping2.6 Potholing(175 Potholes)2.7 PrepareGeotechicalReprotCityof DowneyReview3.1 Prepare 60% Design PlansCityof DowneyReview4.1PilotPlantPlan4.2 Assemblepipe loopwith Citystaff4.3 Runpilot loop& take sample4.4 LabTesting4.5DraftReport4.6 Respond to comments4.7 FinalReportCityofDowneyReview5.1 Prepare 90% Design Plans5.2Engineer's EstimateCityofDowneyReview6.1 Prepare Final Design Plans6.2FinalSpecifications&BidDocuments6.3 Engineer's EstimateCityof DowneyReviewAwardConstruction Contracts7.1 Prepare draftplan for review7.2 Respondto comments7.3Prepare FinalPlan8.1 Prepare Draft CEQA/NEPACityofDowneyReview8.2Address comments8.3 Attend Public Outreach Meetings8.4 Prepare FinalCEQA/NEPA Plans9.1 Assist with State Board application9.2 Prepare required documents10.1ReviewShopDrawings10.2 Respond to RFIs10.3 Design Clarifications10.4 Site Visits10.5 Prepare Plan Revisions10.6 Startup& Testing10.7 Prepare RecordDrawings2/28FinalCompletionJunJulAugSepOctNovDecJanFebMarAprMayJunJulAugSepOctNovDecJanFebMarAprMayJunJulAugSepOctNovDecJanFebMarAprMayJun2026202720282029City ofDowneySystemwide Water Supply ImprovementsCIP Projects Nos. 24-22 & 26-28Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 CITY OF DOWNEY 20
Required Information
1. LEGAL NAME OF YOUR FIRM, ADDRESS, AND
TELEPHONE NUMBER
Tetra Tech, Inc.
17885 Von Karman Avenue, Suite 500
Irvine, CA 92614-5227
Tel 949.809.5000
2. YEAR YOUR FIRM WAS ESTABLISHED
1966, in Pasadena, CA
3. IDENTIFICATION OF PROJECT MANAGER
This project will be led by Steve Tedesco, PE, BCEE
4. NAME, ADDRESS, AND PHONE NUMBER OF THE
PERSON TO WHOM CORRESPONDENCE SHOULD
BE DIRECTED
Steve Tedesco, PE, BCEE
Sr. Vice President
17885 Von Karman Avenue, Suite 500
Irvine, CA 92614-5227
949.632.2169
[email protected]
5. LIST OF SUBCONSULTANTS, IF ANY, WHO WILL
BE A PART OF THE PROJECT TEAM, INCLUDING
AREAS OF RESPONSIBILITY
Pascal & Ludwig Constructors - QA/QC Verdantas - Geotechnical Metz Engineers - Survey Kehoe Testing & Engineering - Materials Testing Scott Foster Engineering, Surge Analysis 2R Drilling - Drilling Associated Trac Safety - Trac Control Plans Centerra Subsurface - C Below - Potholing Gillis & Panichapan Architects, Inc - Architecture
6. LIST OF SMALL AND MINORITY FIRMS’
PARTICIPATION AND APPROXIMATE DOLLAR
VALUE OF THE CONTRACT TO THE FIRMS
Kehoe Testing & Engineering, SBE: $4,000
Scott Foster Engineering, SBE: $87,500
2R Drilling, SBE: $43,000
Centerra Subsurface - C Below, SBE: $270,000
Trac Control Engineering, SBE: $750,000
Gillis & Panichapan Architects, Inc, SBE: $179,750
Please refer to our GFE outreach GPa steps appended
to this proposal.
7. GENERAL DESCRIPTION OF THE STRUCTURE OF
YOUR ORGANIZATION
Publicly-traded corporation
8. A MINIMUM OF FOUR REFERENCES THAT THE
CITY MAY CONTACT
Chris Olsen, Executive Director of Engineering and
Water Resources, Orange County Water District
714.478.3232
[email protected]
Paul Cook, General Manager, Irvine Ranch Water District 949.453.5500
[email protected]
Jerry Vilander, General Manager, Serrano Water District 714.538.0079
[email protected]
Roseanne Weston, PE, PMP, Engineering Director,
Yorba Linda Water District
714.701.3102
[email protected]
9. REPRESENTATIVE LISTING OF SIMILAR
CONTRACTS THAT INVOLVED PROJECTS
RECEIVING FEDERAL GRANT FUNDING AND
COMPLIANCE WITH FEDERAL REQUIREMENTS
Please refer to the table on Page 2 of this proposal.
10. LIST OF CONTRACTS WITH THE CITY OF DOWNEY
DURING THE LAST FIVE YEARS
Please refer to the table on Page 2 of this proposal.
11. GENERAL INFORMATION CONCERNING TETRA
TECH’S ABILITY TO PERFORM THIS WORK
Please refer to the body of this proposal.
12. TETRA TECHS RATE SCHEDULE WITH EFFECTIVE
DATES
Please refer to our Fee Proposal on in the appendix.
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
RACHEL DRAFTING
2-PAGE RESUMES, TO BE
INCLUDED IN DRAFT 2
APPENDIX FEE
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
Price Summary / TotalsTask PricingTotals8,040,000Bill Rate >350.00 325.00 280.00 145.00260.00 160.00 325.00240.00 240.00 235.00320.00 150.00 145.00280.00 160.00 250.00 225.00150.00 235.00 185.00145.00 140.00 320.00 320.00350.00Specify Add'l Fees on Setup 0Technology Use FeeProj Area >Management Process Process ProcessCivil Civil Conveyance ConveyanceConveyance Conveyance Electrical/I&C Electrical/I&C Electrical/I&C Structural StructuralMechanical Mechanical Administration Cad Design CAD Design CAD Design CAD DesignQA/QC QA/QC QA/QC8,040,000Submittedto: City ofDowney - Public Works Department(Attn: Dan Mueller)Contract Type: T&MProject Phases / TasksFrom Thru Months32,188676 666 8881,852 672 1,216374 572 5121,320 304 2,0402,392 276 1,282940 3,580 288684 1,836 4,774 4,464210 90 2800.00%6,159,230 1,877,130 3,640- -8,040,00012345678910111213141516171819202122232425Task 1 - Project Management07/30/26 12/22/2716.5 37 328296 134 54- - 64- 16 -- - -- - -- - -28 - -- - -- -90,490 648- -- 91,1381.1 Kickoff Meeting12 2 4423,340 6483,9881.2 Bi-weekly Meetings42 12 1216212,56012,5601.3 Meeting agendas & minutes36 4 1216410,06010,0601.4 Monthly Schedule Updates20 4 4845,3805,3801.5 Task status & resolve issues34 20 244410,59010,5901.6 Proactive Communications64 40 1244420,84020,8401.7 Coordinate project development & approvals56 40 444418,24018,2401.8 Implement QA/QC plan32 12 48449,4809,480Task 2 - UtilitySearch,Research,Survey,Geotechnical Analysis07/30/26 10/28/262.9 7 58306 44 2612 - 56100 12 -- - 44 - 84 - 1620 - -- - -- -73,030 674,162- -- 747,1922.1 Preliminary Design Meeting8 4 42,7002,7002.2 Research all available data52 8 44 48 4441213,94013,9402.3 Perform utility search6624 402011,09011,0902.4 Coordinate permitting84 20 420 4019,90019,9002.5 Survey & Mapping32 4 42049,200 207,200216,4002.6 Potholing (175 potholes)28 4 44 4126,780 302,658309,4382.7 Prepare Geotchnical Report36 4 44 4444 449,420 164,304173,724Task 3 - Preliminary(60%)Design07/30/26 03/24/277.6 17 153 12,420168 236 320 73688 336 104172 172 49680 720 90080 420 360 1,00412 328 1,032 2,2762,196 64 2892 2,279,880234,976 -- -2,514,8563.1 Prepare 60% Design Drawings12,420 168 236320 736 88336 104 172172 496 80720 900 80420 360 1,00412 328 1,032 2,2762,196 64 2892 2,279,880234,976 -- -2,514,856General (12 sheets)176 41616 816 812 12164 128 12 161637,04037,040Civil (48 sheets)1,312 4080 40 24080 320240 240 1220237,240237,240Pipeline (108 sheets)2,692 3280 160 160480240 48080 120 42042020562,500562,500Traffic Control (8 Sheets)32 1216410,800 173,600184,400Structural (48 sheets)1,364 121680 42080 160 320240 820 8239,160239,160Architectural (12 Sheets)76 1212408 421,060 58,57679,636Process (82 sheets)2,532 3280 160 480120 48080 420 320320 2020490,700 2,800493,500Electrical (65 sheets)2,284 121240 48048040 240 480480 128359,740359,740Instrumentation(52 sheets)1,952 1220 12040 24042040 80 480480 128321,640321,640Task 4 - Pilot Pipe Study07/30/26 10/28/262.9 7 58450 42 -104 80 -- - -- - -- - -- - 21212 - -- - -- -104,920 27,440 1,680- -134,0404.1 Pilot Plant Plan64 420 4012,80012,8004.2 Assemble pipe loop with City staff48 84011,8001,68013,4804.3 Run pilot loop & take samples108 8208026,40026,4004.4 Lab testing50 284011,940 27,44039,3804.5 Draft Report96 820 4020 819,90019,9004.6 Respond to comments32 416128,5808,5804.7 Final Report52 82020 413,50013,500Task 5 - 90% Plans & Estimate10/29/26 01/06/272.2 5 4510,532 88 164160 736 96 336112 172 172496 88 720900 88 420 3601,044 12 208612 1,736 1,616 6832 961,940,720 625,296- -- 2,566,0165.1 Prepare 90% Design Plans10,360 84 160160 736 88336 104 172172 496 80720 900 80420 360 1,00412 208 6121,656 1,616 6428 921,903,980 625,296- -- 2,529,276General (12 sheets)168 4816 816 812 12164 128 12 161634,44034,440Civil (48 sheets)1,252 2040 40 24080 320240 240 1220217,240217,240Pipeline (108 sheets)2,432 1280 160 160480240 48040 120 32032020517,600 95,200612,800Traffic Control (132 Sheets)28 81649,400 442,400451,800Structural (48 sheets)1,232 8880 42040 160 240240 820 8214,160214,160Architectural (12 Sheets)68 88408 418,360 84,896103,256Process (82 sheets)1,928 880 80 480120 48040 240 200160 2020377,400 2,800380,200Electrical (54 sheets)1,752 8440 48048040 40 320320 128273,140273,140Instrumentation(32 sheets)1,500 812 4040 24042040 40 320320 128242,240242,2405.2 Engineer's Estimate172 4 488884080 44 436,74036,7406.0 Final(100%)Plans,Specifications,& Estimate01/07/27 03/24/272.5 6 494,002 52 8252 100 36 10030 88 88128 24 360360 40 21488 364 132148 192 562 57268 30 92759,790 266,224- -- 1,026,0146.1 Prepare Final Design Plans3,956 50 7648 100 2496 30 8888 128 20360 360 40210 88 364128 148 192562 572 6428 92747,820 266,224- -- 1,014,044General (13 sheets)112 288 48 28 884 88 12 121222,77022,770Civil (15 sheets)410 820 20 8020 8070 80 122076,69076,690Pipeline (108 sheets)1,096 88 2080 8012080 240120 40 40120 12020227,180227,180Traffic Control (132 Sheets)16 4845,400 224,000229,400Structural (10 sheets)622 41240 21040 40 120120 820 8112,860112,860Architectural (12 Sheets)128 43,960 39,42443,384Process (82sheets)580 812 20 128 12040 80 120120 2020114,840 2,800117,640Electrical (54 sheets)812 81212 24024020 20 120120 128130,580130,580Instrumentation(32sheets)296 812 88 12012012853,54053,5406.2 Final Specifciations & Bid Documents24 2 44444 26,2806,2806.3 Engineers Estimate22212 445,6905,690Task 7 Distribution System Disinection and MonitoringPlan01/07/27 02/03/270.9 2 18270 20 -60 40 -- - -- - -- - -- - 140- - -- - 10- -64,300 -- -- 64,3007.1 Prepare draft plan for review88 420 4020418,58018,5807.2 Respond to comments70 82040218,04018,0407.3 Prepare Final Plan112 82080427,68027,680Task 8 - CEQA/NEPA Pcompliance & Public Outreach10/22/26 01/13/272.7 6 54264 36 -- - 8044 - -- - -- - -- - 8024 - -- - -- -62,040 -280 -- 62,3208.1 Prepare Draft CEQA & NEPA Plans72 440 20816,20016,2008.2 Address Comments112 84 880 1224,92024,9208.3 Attend Public Outreach Meetings32 16169,76028010,0408.4 Prepare Final CEQA/NEPA Plans48 820 16411,16011,160Task 9 - Provide Fundingassistance10/22/26 01/13/272.7 6 54272 12 -- - 12040 - -- - -- - -- - 8020 - -- - -- -62,800 -- -- 62,8009.1 Assist with State Board application72 440 20816,20016,2009.2 Prepare required documentation200 880 2080 1246,60046,600Task 10 - As-Built & Construction EngineeringSupport03/25/27 02/28/2922.8 51 454 3,37680 104 180 160132 260 100140 80 200108 236 23260 224 132 64028 - -200 80 -- -721,260 48,384 1,680- -771,32410.1 Submittal / Shop Drawings (200)1,632 12 4040 120 40120 40 8080 120 40120 120 40120 120 24020120338,000 28,224366,22410.2 RFI Response (70)452 8 2040 40 4080 40 404 1212 8 1212 80 4102,680102,68010.3 Design Clarifications (60)228 8 840 12204 1212 8 2080 451,78051,78010.4 Site Visits (40)176 16 8204 1612 208040,0201,68041,70010.5 Prepare plan revisions (20)196 12 420204 2020 4 128042,520 9,52052,04010.6 Startup & Testing Assistance172 20 2040 2040 161647,42047,42010.7 Prepare Record Drawings520 4 420 20 2080 1240 4040 8080 8098,840 10,640109,480Totals07/30/26 02/28/29 30.532,188676 666 8881,852 672 1,216374 572 5121,320 304 2,0402,392 276 1,282940 3,580 288684 1,836 4,774 4,464210 90 280 0.00%6,159,230 1,877,130 3,640- -8,040,000Task PricingTotalsScheduleWork DaysOffWork DaysTotalLabor HrsSubs Travel Mat'ls & Equip ODCsLaborRate Esc.LaborEngineer 1 (Various)CAD Designer (Various)Sr Engineer 3 (SteveEllis)Sr Engineer 3 (VictorRamirez)Principal Engineer (TomEpperson)Engineer 3 (GeoffHeinen, PE)Sr Engineer 1 (Peter Yu)Project Engineer 1 (KyleMatsumoto)Sr Project Administrator(Deana Escamilla)CAD Director (WillieJohnson)Sr CAD Designer 2 (RussWojtaszek)Sr Engineer 1 (KyleBohn)Project Engineer 2 (EricaJenkins)Sr Engineer 3 (MazenKassar)Engineer 2 (JamesRoberts)Engineer 2 (Johnson Le)Sr Engineer 2 (Eric Yuen)Sr Engineer 2 (AmandaTaylor)Engineer 1 (NicholasMao)Project Engineer 2(Crisna Raymond)Engineer 3 (Jodie Yu)Conveyance TeamLeader (Mark Bush)Sr Engineer 1 (MollyLovegren)Capital Improvements Project N0.24-22 Northly Water Supply Treatment Improvements and Capital Project No. 26-28 Southerly Water Supply ImprovementsTotal PricePricing by ResourceProject Manager (SteveTedesco, PE)Process Team Leader(Kara Buttacovoli)25 ResourceCity of Downey - Statewide Water Supply TreatmentIPrice ProposalRevision Date:Jul 16, 2026Labor PlanTetra Tech - Confidential and ProprietaryPage 1 of 1Printed 7/16/2026Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
Project Management
Project Manager $350.00
Principal Engineer $350.00
Sr Project Administrator $150.00
Engineers
Engineering Technician $95.00
Engineer 1 $145.00
Engineer 2 $150.00
Engineer 3 $160.00
Project Engineer 1 $225.00
Project Engineer 2 $235.00
Sr Engineer 1 $240.00
Sr Engineer 2 $280.00
Sr Engineer 3 $320.00
Designers & Technicians
CAD Technician 1 $91.00
CAD Technician 2 $106.00
CAD Technician 3 $128.00
CAD Designer $140.00
Sr CAD Designer 1 $160.00
Sr CAD Designer 2 $185.00
CAD Director $235.00
General & Administrative
Project Assistant 1 $80.00
Project Assistant 2 $96.00
Project Administrator $145.00
Graphic Artist $160.00
The above rates are good until December 31, 2027. Subcontractors will be billed at cost plus 12%. Other direct costs (ODS) including postage, FedEx, printing, and etc. will be billed at cost plus 10%. If there are any unusual expenses such as equipment, large printing jobs, or travel outside of California, we will negotiate those expenses with the City.
HOURLY CHARGE RATE AND EXPENSE
REIMBURSEMENT SCHEDULE
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
RACHEL DRAFTING
2-PAGE RESUMES, TO BE
INCLUDED IN DRAFT 2
APPENDIX RESUMES
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
RESUMES TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 City of Downey
PFAS Treatment Systems Design On-Call
Services, Orange County Water District. Project
Manager. Tetra Tech was selected to design the rst three PFAS projects (six aected wells) as part of their program to construct treatment facilities for 66 aected wells in Orange County, including:
Serrano Water District Well 5 and 9 This project
consists of a 3,000 GPM IX system with a bag lter pre- treatment, 3,000 GPM booster pump station, and new
chemical feed system for disinfection.
Kimberley Well 1A Located on a very small site with
a single well, this facility is designed to produce 3,000 GPM using an IX System with a bag lter pre-treatment
and new chemical feed system for disinfection.
Fullerton Main Plant The Plant will treat six onsite wells with a total capacity of 10,100 GPM. PFOS, PFOA and
VOCs will be removed using 6 to12 diameter, 40,000
Ib. GAC vessels that will discharge into an existing forebay then pumped into the distribution system. The remaining wells will be treated with an IX system consisting of 8 vessels and bag lters for pre-treatment.
Yorba Linda Water District Headquarters Plant
This system will treat water from 10 wells with a total capacity of 17,400 GPM. An IX System consisting of 11
pairs of Lead/ Lag Vessels (22 vessels total), bag lter pre-treatment, booster pump station, and new onsite
generation system for chlorine disinfection. In order to get the system on the existing site an extensive analysis of the site improvements was completed.
Kimberly 2 PFASWTP, Fullerton, CA This project
is for the nal design to provide PFAS treatment at
the City of Fullerton Kimberly 2 Well. The plant will
treat ow from one well with future planning to add a
second well to the treatment site for a total capacity of
4.6 MGD. Treatment processes include 5 micron bag
lters, ion exchange pressure vessel contactors, and
new chemical feed facilities for sodium hypochlorite.
The existing booster pump station is being demolished
as part of this project and the well pump is being
replaced to support delivery of the water through
treatment and directly into distribution.
Sherrill Well PFAS WTP This project is for the nal
design to provide PFAS treatment at the Golden State
Water Company Sherrill Well. The 500 gpm plant will
treat ow from one well through 5 micron bag lter
and ion exchange pressure vessel contactors. The
well pump is being replaced to support delivery of the
water through treatment and directly into distribution.
PROJECT MANAGER
Steve Tedesco, PE, BCEE (Continued)
SGU PFAS Treatment Plant, Irvine Ranch Water
District, Irvine, CA. Technical Advisor. Tetra Tech is
providing design and construction support services
for the District’s 12 shallow wells aected by very high VOC levels and PFAS located on site of former El Toro
Marine Base. Design included GAC treatment and the
replacement of a existing air stripper system. Permitting was required from the City on the pipeline.
Well ET-1 PFAS Study, Irvine Ranch Water District,
Irvine, CA. Engineer of Record. ET-1 was developed
to increase utilization of the Irvine Subbasin through
recovery and treatment of VOC impaired, poor-quality
groundwater. The project cleans up the contaminated
VOCs, with the treated water used for non-potable
purposes. Water extracted from inside the VOC plume is
treated using granular activated carbon and air stripping technologies. PFAS was found in the product water from
the existing plant. IRWD contracted with Tetra Tech to
develop options for treating PFAS at ET-1 and planning the site for the future addition of Wells ET-2 and 78 if PFAS is found at these wells.
Well Improvements and Treatment, City of
Compton, CA. Project Manager. Task order contract
to analyze water infrastructure and evaluate its water
production, conveyance, storage, and distribution
infrastructure, including production wells and
associated groundwater quality, as well as provide
design, permitting, and construction management
services. Evaluating eight production wells for water
quality, including potential contaminants such as VOCs, 1,4-dioxane, PFAS, and other organic and inorganic
substances. Assessing wells’ production capacity,
integrity, and condition. Providing recommendations
for rehabilitation and repairs to meet and exceed state and federal water quality standards. Evaluation extends to water-related infrastructure, encompassing security, safety, distribution systems, storage facilities, and SCADA systems, with recommendations for necessary upgrades
or replacements.
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
RESUMES TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 City of Downey
PROCESSTEAMLEAD
Kara Buttacavoli, PE (Continued)
Fullerton Main Plant: The Fullerton Main Plant will
treat six onsite wells with a total capacity of 10,100
GPM.PFOS,PFOA and VOCs will be removed using
6 to 12 diameter, 40,000 Ib. GAC vessels that will
discharge into an existing forebay then pumped into
the distribution system. The remaining wells will be
treated with an IX system consisting of 8 vessels and
bag lters for pre-treatment.
Yorba Linda Water District Headquarters Plant:
This system will treat water from 10 wells with a total capacity of 17,400 GPM. An IX System consisting of 11
pairs of Lead/ Lag Vessels (22 vessels total), bag lter pre-treatment, booster pump station, and new onsite
generation system for chlorine disinfection. In order to get the system on the existing site an extensive analysis of the site improvements was completed.
Kimberly 2 PFASWTP, Fullerton, CA: This project
is for the nal design to provide PFAS treatment at
the City of Fullerton Kimberly 2 Well. The plant will
treat ow from one well with future planning to add a
second well to the treatment site for a total capacity of
4.6 MGD. Treatment processes include 5 micron bag
lters, ion exchange pressure vessel contactors, and
new chemical feed facilities for sodium hypochlorite.
The existing booster pump station is being demolished
as part of this project and the well pump is being
replaced to support delivery of the water through
treatment and directly into distribution.
Sherrill Well PFAS WTP. This project is for the nal
design to provide PFAS treatment at the Golden State
Water Company Sherrill Well. The 500 gpm plant will
treat ow from one well through 5 micron bag lter
and ion exchange pressure vessel contactors. The
well pump is being replaced to support delivery of the
water through treatment and directly into distribution.
SGU PFAS Treatment Plant, Irvine Ranch Water
District, Irvine, CA. Project Manager. Design and
construction support services for the District’s 12 shallow wells aected by very high VOC levels and PFAS located
on site of former El Toro Marine Base. Design included
GAC treatment and the replacement of a existing air
stripper system. Permitting was required from City on
pipeline.
PFAS Study for Wells ET-1, ET-2 and 78, Irvine
Ranch Water District, Irvine, CA. Lead Project
Engineer. Study to determine options to add PFAS
treatment to an operating VOC air stripper project. Well ET-1 operates at 2.0 MGD through on tray air stripper that discharges into a small wet well with a single booster
pump station. Plant is on a small lot with limited space.
Project included analysis of water quality, options for IX or GAC treatment and analysis of adding wells ET-2 and 78
to the project if they become aected by PFAS. Prepared capital and O&M costs.
PFAS Mitigation and Treatment Program, Orange
County Water District, CA. Project Engineer. PFOS
and PFOA treatment was implemented for 18 aected
wells in the Orange County Basin using adsorptive media pressure vessel contactors (IX or GAC). Each well site’s hydraulics were evaluated, leading to modications,
replacement of well pumps, or the addition of booster
pump stations to maintain site capacity. Designs included pre-treatment ltration, backwash systems, and relocated disinfection chemical feeds to prevent degradation of
adsorptive media. PLCs and custom programming were
added to support treatment facility operations, with
phased implementations addressing site-specic water
quality and scalability.
John Garthe Reservoir PFAS Treatment, City of
Santa Ana, CA. Project Manager. Final design for PFAS
treatment at John Garthe site, supplied by ve wells to produce up to 13.8 MGD. New centralized treatment
plant removes PFAS from well supply line prior to storage at reservoir. Treatment equipment includes 5-micron
cartridge lters, ion exchange pressure vessel contactors, new on-site generation, and storage and feed facilities for sodium hypochlorite. Evaluated well pumps on an
individual basis and will replace or modify as needed to meet new plant and system demands.
PFAS Compliance Study, City of South Gate CA.
Project Manager. Study to determine options to add PFAS treatment to four existing wells in the City of South Gate aected by PFOS & PFOA. Study included: analyzed
water quality, reviewed well pumps and motors, analyzed centralized treatment option, provided site layouts,
developed capital and operations costs, and provided
costs for 1,4-Dioxane treatment if needed in future.
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
RESUMES TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 City of Downey
CONVEYANCE TEAM LEAD
Mark Bush, PE (Continued)
Burris Pump Station Phases 1 and 2, Orange
County Water District, Anaheim, CA. Design of
the new Burris Pump Station consisted of four 1,750
horsepower vertical turbine pumps delivering a
maximum ow rate of 200 cubic feet per second to the
Santiago Basins from Burris Basin. Work consisted of
reviewing the existing Burris Pump Station Evaluation
Report, assisting Orange County Water District (OCWD)
with selecting a replacement option, performing nal
design of the selected option, and providing bid and
construction phase services. The project included
unique designs: 190,000 cubic yards of earthwork to
be completed prior to pump station construction, the
construction of a 55-foot diameter by 55-foot-high
circular wet well, which was computer and physically
modeled during design for ow characteristics, and the
construction of an 180,000-gallon surge suppression
system.
Phase 1 Well Equipping, Phase 1B Pipelines and
Treatment Facilities, Eastern Municipal Water
District, San Jacinto, CA. Pipeline Design Lead.
Final design for well equipping, associated piping, and central groundwater treatment plant. Scope includes
survey, geotechnical investigation, nal plans for civil site, mechanical, process, electrical and instrumentation components of treatment and blending facility, and nal plans for well site work, pipeline plan, and prole sheets, specications and cost estimates.
Well Site Improvements, Irvine Ranch Water
District, Irvine, CA. QA/QC. Designed site
improvements and construction for groundwater Wells
6, 12, 14, and 15 including assessments of mechanical,
structural, civil, and instrumentation and control
systems. Conducted a eld visit to sites and prepared a conditional assessment memorandum of all equipment
and site features required to properly operate them.
City Trunk Line North Unit 2, Los Angeles
Department of Water & Power, CA. QA/QC
Manager. Project included over 12,000 feet of 54-inch
welded steel pipe in San Fernando Valley to replace
a segment of Los Angeles City Trunk Line. Originally
constructed in 1914, rst pipeline to serve city from
Los Aqueduct. Performed preliminary and nal design
services, permitting support, trac control, subsurface utility locations, and material procurement documents.
Phase 1 Well Equipping and Treatment Facilities,
Eastern Municipal Water District, San Jacinto,
CA. Pipeline Design Lead. Prepared a preliminary design report with an evaluation of pipeline corridors from four wells to a central groundwater treatment plant, review of treatment technology for iron and manganese removal,
disinfection using chloramines, booster pump station
and reservoir, and well equipping evaluation. Prepared
preliminary design drawings to a 30% design level to
address civil site, mechanical, process, electrical, and instrumentation components of treatment and blending
facility, site work, and pipeline plan and prole sheets.
Scope included a geotechnical investigation of well sites, treatment plant, and pipeline corridors, aerial and ground survey, potholing and a corrosion analysis.
Burris Pump Station Phases 1 and 2, Orange
County Water District, Anaheim, CA. Design of
the new Burris Pump Station consisted of four 1,750
horsepower vertical turbine pumps delivering a
maximum ow rate of 200 cubic feet per second to the
Santiago Basins from Burris Basin. Work consisted of
reviewing the existing Burris Pump Station Evaluation
Report, assisting Orange County Water District (OCWD)
with selecting a replacement option, performing nal
design of the selected option, and providing bid and
construction phase services. The project included
unique designs: 190,000 cubic yards of earthwork to
be completed prior to pump station construction, the
construction of a 55-foot diameter by 55-foot-high
circular wet well, which was computer and physically
modeled during design for ow characteristics, and the
construction of an 180,000-gallon surge suppression
system.
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
RESUMES TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 City of Downey
CIVILDESIGNLEAD
Crisna Raymond, PE (Continued)
Yorba Linda Water District Headquarters Plant:
This system will treat water from 10 wells with a total capacity of 17,400 GPM.An IX System consisting of 11
pairs of Lead/Lag Vessels (22 vessels total), bag lter pre-treatment, booster pump station, and new onsite
generation system for chlorine disinfection. In order to get the system on the existing site an extensive analysis of the site, improvements was completed.
PFAS Study for Wells ET-1, ET-2 & 78, Irvine Ranch
Water District, Irvine, CA. Project Engineer for a study to determine the options to add PFAS treatment to an
operating VOC air stripper project. Well ET-1 operates at
2.0 MGD through on tray air stripper that discharges into a small wet well with a single booster pump station. The existing plant is located on a small lot with limited space.
Project included analysis of water quality, options for IX or GAC treatment and analysis of adding wells ET-2 and 78
to the project if they become aected by PFAS. Capital
and O&M costs were also prepared.
PalmyritaWater Treatment Plant PFAS
Removal, Riverside, CA. Project Engineer. The
City of Riverside has authorized Tetra Tech to provide
design, construction management and inspection
services for site modications at the Palmyrita WTP for Per- and Polyuoroalkyl Substances (PFAS) removal. The
expansions to the site will treat the raw water from the existing four (4) wells in the North Orange Well Field aer it is blended with the euent from the existing Palmyrita WTP.
PFAS Ottawa WTP End Pipe of Treatment, City
of Dayton, OH. Project Engineer. City faces PFAS
contamination at WTP due to a plume in the Mad River
Well Field. Tasked with planning and engineering
evaluation to identify cost-eective PFAS treatment
system to mitigate PFAS levels to below detection limits in nished water. Evaluating storage, blending, adsorptive media selection, siting, and exploring alternative delivery methods. Key considerations include storage adequacy,
blending analysis to achieve 80% treatment levels, bench testing for media selection, and evaluating site options for minimal impact. Project aims to enhance water treatment and storage while minimizing operational costs to provide safe drinking water to Dayton Region. Once complete,
PFAS treatment facility will be largest in the US.
Tract 349 Well Nos 3 and 4 WTP, Water
Replenishment District of Southern California,
Cudahay, CA. Project Engineer. As part of a requirement for state funding, conducted a consolidation evaluation to assess cost and feasibility of merging with another public water system.
SGU PFAS Treatment Plant, Irvine Ranch Water
District, Irvine, CA. Project Engineer. Design and
construction support services for district’s 12 shallow wells aected by very high VOC levels and PFAS located
on site of former El Toro Marine Base. Design included
GAC treatment and replacement of an air stripper system.
Permitting required from city on pipeline.
Well ET-1 PFAS Study and Design, Irvine Ranch
Water District, Irvine, CA. Project Engineer.
Developed ET-1 to increase utilization of Irvine Subbasin through recovery and treatment of VOC-impaired, poor-
quality groundwater. Project cleaned up contaminated
VOCs with treated water used for non-potable purposes.
Water extracted from inside VOC plume treated using
granular activated carbon and air stripping technologies.
Analyzed project water quality. Developed three options for treating PFAS discovered at ET-1 as well as options to include wells ET-1 and 78 into project if PFAS found at those wells. Determined if IX or GAC treatment should be used. Developed capital and operations cost. Prepared
nal design, schedule, and cost estimate.
Irvine Desalter Project Potable and Non-Potable
Well Drilling and Equipping, Irvine Ranch
Water District, CA. Design Engineer. Prepared plans,
specications, and permitting. Design of drilling and
equipping for ve potable water wells and one non-
potable water well, including wellhead equipping for
each well for both aboveground and belowground
facilities. Project included modication to a non-potable water well.
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
RESUMES TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 City of Downey
PROCESSENGINEER
Amanda Taylor, PE (Continued)
Fullerton Main Plant: The Fullerton Main Plant will
treat six onsite wells with a total capacity of 10,100
GPM.PFOS,PFOA and VOCs will be removed using
6 to 12 diameter, 40,000 Ib. GAC vessels that will
discharge into an existing forebay then pumped into
the distribution system. The remaining wells will be
treated with an IX system consisting of 8 vessels and
bag lters for pre-treatment.
Yorba Linda Water District Headquarters Plant:
This system will treat water from 10 wells with a total capacity of 17,400 GPM. An IX System consisting of 11
pairs of Lead/ Lag Vessels (22 vessels total), bag lter pre-treatment, booster pump station, and new onsite
generation system for chlorine disinfection. In order to get the system on the existing site an extensive analysis of the site improvements was completed.
Kimberly 2 PFASWTP, Fullerton, CA: This project
is for the nal design to provide PFAS treatment at
the City of Fullerton Kimberly 2 Well. The plant will
treat ow from one well with future planning to add a
second well to the treatment site for a total capacity of
4.6 MGD. Treatment processes include 5 micron bag
lters, ion exchange pressure vessel contactors, and
new chemical feed facilities for sodium hypochlorite.
The existing booster pump station is being demolished
as part of this project and the well pump is being
replaced to support delivery of the water through
treatment and directly into distribution.
Sherrill Well PFAS WTP: This project is for the nal
design to provide PFAS treatment at the Golden State
Water Company Sherrill Well. The 500 gpm plant will
treat ow from one well through 5 micron bag lter
and ion exchange pressure vessel contactors. The
well pump is being replaced to support delivery of the
water through treatment and directly into distribution.
PFAS Study for Wells ET-1, ET-2 & 78, Irvine Ranch
Water District, Irvine, CA. Process Engineer. Study to determine options to add PFAS treatment to an operating VOC air stripper project. Well ET-1 operates at 2.0 MGD through a tray air stripper that discharges into a small wet well with a single booster pump station. The existing plant is located on a small lot with limited space. Project included analysis of water quality, options for IX or GAC treatment, and analysis of adding wells ET-2 and 78 to the project if they become aected by PFAS. We also prepared capital
and O&M costs.
PalmyritaWater Treatment Plant PFAS
Removal, Riverside, CA. Project Engineer. The
City of Riverside has authorized Tetra Tech to provide
design, construction management and inspection
services for site modications at the Palmyrita WTP for Per- and Polyuoroalkyl Substances (PFAS) removal. The
expansions to the site will treat the raw water from the existing four (4) wells in the North Orange Well Field aer it is blended with the euent from the existing Palmyrita WTP.
PFAS Arlington Desalter Plant, Western
Municipal Water District, Riverside, CA. Process
Engineer. Provided technical support to Western
Municipal Water District (WMWD) for the evaluation
and design of a new treatment process for per- and
polyuoroalkyl substances (PFAS) removal at the Arlington Desalter in Riverside County, CA. The 7.25 MGD facility utilizes reverse osmosis (RO) and blending to reduce
nitrate and total dissolved solids (TDS) in groundwater from the unadjudicated Arlington Sub-basin, supplying
potable water to the Cities of Norco and Corona. The
project involved engineering review of the proposed
ion exchange (IX) treatment system for PFAS removal
from the RO bypass stream, including assessment of
operational compatibility, hydraulic integration, and
treatment performance. Work included evaluation of
sizing, siting, cost, and permitting considerations to
support amendment of the facility’s domestic water
supply permit. Recommendations addressed pilot testing, system optimization, and alignment with upcoming
EPA and California Division of Drinking Water (DDW)
PFAS regulations to ensure regulatory compliance and
continued delivery of safe, high-quality drinking water.
PFAS Ottawa WTP End Pipe of Treatment, City
of Dayton, OH. Lead Design Engineer. City faces
PFAS contamination at WTP due to a plume in the Mad
River Well Field. Tasked with planning and engineering
evaluation to identify cost-eective PFAS treatment
system to mitigate PFAS levels to below detection limits in nished water. Evaluating storage, blending, adsorptive media selection, siting, and exploring alternative delivery methods. Key considerations include storage adequacy,
blending analysis to achieve 80% treatment levels, bench testing for media selection, and evaluating site options for minimal impact.
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
RESUMES TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 City of Downey
PIPELINE ENGINEER
Molly Lovegren, PE (Continued)
Carlsbad Desalination Conveyance Pipeline,
Poseidon Water. Design Engineer. Provided
engineering support for approximately 10 miles of
54-inch transmission pipeline conveying treated water
from the Carlsbad Desalination Plant through multiple
jurisdictions. Responsibilities included pipeline design, proles, utility coordination, tunnel interfaces, and
construction support.
Central Water Integration Pipeline, San Antonio
Water System. Project Engineer. Prepared engineering
for multiple large-diameter transmission pipeline
segments supporting integration of a major new potable
water supply into San Antonio’s regional distribution
system.
PFAS Compliance Study, City of South Gate CA.
Design Engineer. Study to determine options to add PFAS treatment to four existing wells aected by PFOS and
PFOA. Study included: analyzed water quality, reviewed
well pumps and motors, analyzed centralized treatment
option, provided site layouts, developed capital and
operations costs, and provided costs for 1,4-Dioxane
treatment if needed in the future.
Moreno Valley Perris Final Design Well Equipping
and Treatment Facilities, Eastern Municipal
Water District, Perris, CA. Project Engineer. Eastern
Municipal Water District (District/EMWD) is planning
to construct two new wells (Wells 65 and 66) to extract and treat the groundwater from the Perris North Sub
basin. Additionally, EMWD is planning to install a new
well (Well 204) to extract and treat groundwater from
the southern portion of the Perris North Sub basin. Doing so, the projects will remediate the aquifer by extracting contaminated groundwater, actively treat groundwater
contaminants, protect the drinking water aquifer, and
reduce water imports to EMWD’s customers. Tetra Tech
prepared an evaluation of the two treatment plant sites for Wells 65 and 66 and Well 204 that builds on the
design basis of the Moreno Valley Area Well 65 and 66
Equipping and Treatment Project – FINAL Preliminary
Design Report (Well 65/66 PDR) and the South Area Well
204 Equipping and Treatment Project – FINAL Preliminary Design Report (Well 204 PDR).
North Hollywood Operable Unit Permanent
Intertie Pipeline Design Services, Lockheed
Martin, Los Angeles County, CA. Project Engineer.
Part of a larger plan that expands the amount of
groundwater extracted and treated from the San
Fernando Valley Basin, which is an important source of
drinking water for the Los Angeles metropolitan area.
Upon completion, the proposed 18-inch intertie pipeline will meet potable water delivery requirements of 4,670
acre-feet per year while operating at a ow velocity of less than seven feet per second (FPS) and will have an average working ow rate of 3,500 GPM and maximum rate of
5,500 GPM. The pipeline will connect an existing 20-inch BWP water main to a 16-inch buried vertical riser (intertie) connected to a 78-inch LADWP water main RSC currently
being constructed approximately 25 feet below grade.
Centennial Park Neighborhood Water Main
Improvements, City of Santa Ana, CA. Project
Engineer. Approximately 20,000 feet of 8-inch PVC
water main to replace existing water mains. The project involved replacing old cast iron mains with new PVC
pipe and then connecting new services to the existing
customer lines. New pipeline alignments were developed
in compliance with State Health separation requirements while also considering trac control and future
maintenance of the pipeline. Developed construction
sequencing to limit the water outage to customers to
less than 8 hours. Connection to the existing water mains required installation of new isolation valves due to the inability of the existing valves to close. This required a design of valve anchor block to keep these new valves
from moving due to thrust and pulling the existing
unrestrained pipe joints apart. The project also required coordination of the appurtenance (e.g. re hydrants, air/ vacs and water quality sampling stations) locations to not impede sidewalk access as well as to not disrupt street parking.
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
RESUMES TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 City of Downey
PUMP STATIONSDESIGN
Kyle Bohn, PE (Continued)
SJVWB-ERRP Phase 1A Pipelines Final Design,
Eastern Municipal Water District, San Jacinto, CA.
Project Engineer. Final design for approximately 4,700
feet of 18-inch and 12-inch PVC raw water pipelines
from four well sites. Work included survey, geotechnical investigation, nal plans, specications, and cost
estimate.
SJVWB-ERRP Phase 1 Well Equipping, Phase
1B Pipelines and Treatment Facilities Final
Design, Eastern Municipal Water District, San
Jacinto, CA. Project Engineer. Final design for the well equipping of four new wells, associated piping and
new central groundwater treatment plant. The scope of
work spanned ve dierent project sites and included
survey, geotechnical investigation, nal plans for civil site, mechanical, process, electrical and instrumentation components of the treatment and blending facility, nal plans for well site work, nal plans for pipeline plan and prole sheets, specications and cost estimates.
Alternate Raw Water Transmission Line, Trabuco
Canyon Water District, CA. Project Engineer.The
project included removing and abandoning the existing
creek crossing and constructing approximately 4,500
feet of new 16-inch PVC raw water transmission main. The nal pipeline alignment routed the pipe through public
walking trails, private property, above-ground over a 144- inch shallow storm drain crossing, through city streets, and across a bridge. It required coordination with Orange County Parks, private property owners, Orange County
Flood Control District, City of Lake Forest, FEMA, and the California Department of Fish and Wildlife.
36-Inch Transmission Main Replacement, City
of Anaheim, CA. Design Engineer. Responsible for
preparing the plans, specications, cost estimates, and construction services for the construction of 700 feet of 36-inch steel pipeline.
Newport Boulevard Water Main Rehabilitation,
City of Newport Beach, CA. Design Engineer.
Provided engineering support for the replacement/
rehabilitation of the existing 20/16-inch cast iron pipeline constructed in the mid-1920s within Newport/Balboa
Boulevard from the intersection of Via Oporto and
Central Avenue to the intersection of Balboa Boulevard
and 19th Street. This pipeline is vital as it provides water and re ow protection to the businesses and residents in the Newport Bay and Peninsula area.
Water Line Replacement Projects, City of
Lakewood, Lakewood, CA. Design Engineer.
Responsible for the preparation of plans and
specications of multiple water line replacement projects for the City of Lakewood. Projects included preparation of plans, specications, and cost estimates for over 50,000 feet of 6- to 12-inch pipeline.
Centennial Park Neighborhood Water Main
Improvements, City of Santa Ana, Santa Ana, CA.
Design Engineer. Responsible for approximately 20,000
feet of 8-inch PVC water main to replace existing water mains.
Central City Water Main Improvements, City
of Santa Ana, Santa Ana, CA. Design Engineer.
Responsible for approximately 6,600 feet of 8-inch PVC
water main to replace existing water mains.
Pico-Lowell Neighborhood Water Main
Improvements, City of Santa Ana, Santa Ana, CA.
Design Engineer. Responsible for approximately 8,200
feet of 8- and 12-inch PVC water main to replace existing water mains.
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
RESUMES TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 City of Downey
QA/QCTEAM
Steve Ellis, PE (Continued)
Well No 1 PFAS WTP, City of Bell Gardens, CA. QA/
QC. Final design for providing PFAS treatment at Well
No. 1. Plant designed to treat ow from one well with a total capacity of 2.9 MGD. Treatment processes included 5-micron cartridge lters, ion exchange pressure vessel contactors, and new chemical feed facilities for sodium hypochlorite.
On-Call Engineering Services for PFAS Treatment
Systems Design, Orange County Water District,
Orange County, CA. QA/QC. Design for aected wells
in Orange County Basin using adsorptive media pressure
vessel contactors (IX or GAC) as part of their program
to construct treatment facilities for 66 aected wells in Orange County.
9 Kimberly Well 1A, PFAS Treatment Systems
Design, Orange County Water District, CA.
QA/QC. Located on a small site with a single well,
facility designed to produce 3,000 GPM using an
IX System with a bag lter pre-treatment and new
chemical feed system for disinfection.
9 Fullerton Main WTP, PFAS Treatment Systems
Design, Orange County Water District, CA. QA/
QC. Design and construction services for site with
Well 3A – 2,250 GPM, Well 4 – 1,400 GPM, Well
5 – 1,500 GPM, Well 6 – 1,400 GPM, Well 7 – 1,700
GPM (o-line), Well 8 – 2,500 GPM, and Well 7A
– Proposed. Five wells (4, 5, 6, 7, and 8) produce
water with TCE and other VOCs. Wells with higher
concentrations of TCE blended with wells with
lower concentrations of VOCs in a blending forebay
structure. Fullerton has an approved blending as
part of Division of Drinking Water permit. Well 3A
pumps directly to distribution system and Well 7
can pump to either forebay or distribution system.
Provided design and construction services.
9 Sherrill Well PFAS WTP. QA/QC. This project is
for the nal design to provide PFAS treatment at
the Golden State Water Company Sherrill Well. The
500 gpm plant will treat ow from one well through
5 micron bag lter and ion exchange pressure
vessel contactors. The well pump is being replaced
to support delivery of the water through treatment
and directly into distribution.
Well ET-1 PFAS Study, Irvine Ranch Water District,
Irvine, CA. QA/QC. ET-1 developed to increase
utilization of Irvine Subbasin through recovery and
treatment of VOC impaired, poor-quality groundwater.
Project cleaned up contaminated VOCs with treated
water used for non-potable purposes. Water extracted
from inside VOC plume treated using granular activated
carbon and air stripping technologies. Found PFAS in
product water from plant. Developed options for treating PFAS at ET-1 and planning site for future addition of Wells ET-2 and 78 if PFAS found at these wells.
SGU PFAS Treatment Plant, Irvine Ranch Water
District, Irvine, CA. QA/QC. Design and construction
support for 12 shallow wells aected by high VOC levels and PFAS located on site of former El Toro Marine Base.
Design included GAC treatment and replacement of an
air stripper system. Permitting was required from city on pipeline.
Albert Robles Center for Water Recycling and
Environmental Learning (Formerly known as
GRIP), Water Replenishment District of Southern
California, CA. Project Engineer. Design of a new
13,000-acre-feet per year of fully advanced treated
recycled water. Treatment process includes inuent
facilities, microltration/ultraltration system, reverse osmosis system, ultraviolet advanced oxidation system,
post treatment/stabilization/disinfection, product water wet well, and brine/waste disposal connection.
System-Wide Reservoir Disinfection Technology
Study, Moulton Niguel Water District, Laguna
Niguel, CA. Project Manager. Prepared a feasibility
study to evaluate disinfection technology options
for replacing systems and providing replacement
recommendations. Options considered included
replacing OSG systems with bulk liquid (12.5%) sodium
hypochlorite storage and metering pumps and replacing
OSG systems with updated OSG technology from same
or dierent equipment manufacturer. Study provided
capital, O&M, and life-cycle cost estimates.
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
RESUMES TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 City of Downey
QA/QCTEAM
Tom Epperson, PE (Continued)
Reservoir Management System Upgrades,
Moulton Niguel Water District, Laguna Niguel,
CA. Principal-in-Charge. Final design plans and
specications for replacement of on-site chlorine
generation facilities with 12.5% bulk sodium hypochlorite and ammonia facilities at ve reservoir sites. Addition of reservoir mixers, new block building, electrical
improvements, and demolition of OSG facilities.
Well Equipping and Treatment at Well No 16,
City of Paramount, CA. Project Manager. City drilled
a new 18-inch diameter well (Well No. 16) to increase
ow into potable water system. Based on water quality
data collected during drilling, newly drilled Well No. 16 requires treatment to lter out naturally occurring arsenic, manganese, and iron. Decommissioning Well No. 13 and
treatment facility and relocating a portion of treatment system to new Well No. 16 site.
Well Nos 13 and 14 Chlorine Treatment
Replacement, City of Paramount, CA. Project
Manager. Design and construction support to replace
chlorine gas disinfection systems with bulk sodium
hypochlorite and ammonia chemical delivery systems at
Wells 13 and 14. At both well sites, disinfection systems located outside within a concrete containment area with a shaded canopy.
Crown Valley Pipeline Replacements, Moulton
Niguel Water District, Aliso Viejo, CA. Project
Director. Replacement of the I.D. No. 1 Master Meter
and accompanying interconnecting piping between
South Coast Water District’s Joint Transmission Main
and client’s proposed Crown Valley Transmission Main.
Project consists of three components: Lower Salada Li
Station Force Main Replacement (approx. 9,400 LF of
dual force mains), Crown Valley Parkway Transmission
Main Lower Reach Replacement (approx. 9,700 LF
of transmission main), and I.D. No. 1 Master Meter
Relocation. Master Meter Relocation consists of utility relocations; new below-grade vault; new mechanical
piping and appurtenances; retaining wall; 16-inch steel piping; site grading; miscellaneous electrical and SCADA improvements.
Katella Avenue Water Main Replacement, City of
Anaheim, CA. Project Manager. Design of 3,000 feet
of 16 inch water main on Katella Avenue from Disneyland Drive/West Street to Harbor Boulevard and 4,000 feet
of 12 inch water main on Katella Avenue from Harbor
Boulevard to Haster Street.
Peters Canyon Channel Water Capture and Reuse
Pipeline, Irvine Ranch Water District, Irvine, CA.
Project Manager. Oversaw over 17,000 feet of 10-inch to 16-inch steel and PVC pipeline. This was a joint project with the City of Irvine, City of Tustin, County of Orange, and Caltrans. Project included three storm drain diversion structures and intake design, hanging the pipeline
from two bridges, bore and jack under the railroad and
backpressure vault.
36-Inch Transmission Main Replacement, City
of Anaheim. Project Manager. Preparation of the
plans, specications, cost estimates and construction
services for the construction of 2,000 feet of 36-inch
steel pipeline. In addition, the design phase had a short schedule due to Caltrans freeway widening.
Small Mains Replacement Project, Phase 1, City
of Paramount, Paramount, CA. Project Manager.
Preparation of the plans, specications, cost estimate
and construction services for 3,500 feet of potable water pipeline varying from 6- to 16-inches in diameter. The
project replaced existing cast iron pipelines with new
pipe within the City’s boundaries.
Newport Boulevard Water Main Rehabilitation,
City of Newport Beach, CA.. Project Manager.
Provided engineering support for the replacement/
rehabilitation of the existing 20/16-inch cast iron pipeline constructed in the mid-1920s within Newport/Balboa
Boulevard from the intersection of Via Oporto and
Central Avenue to the intersection of Balboa Boulevard
and 19th Street. This pipeline is vital as it provides water and re ow protection to the businesses and residents in the Newport Bay and Peninsula area.
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
RESUMES TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 City of Downey
QA/QCTEAM
Victor Ramirez, PE, SE (Continued)
Hubbard Hill North (Q0204) Project, San Diego
County Water Authority, San Diego, CA. 2017.
Structural Project Manager. Structural Project Manager
responsible for the Structural Design and Geotechnical
Data Report for the First Aqueduct Structures, FCFs,
and Lining Rehabilitation. The project removed the
internal lining from steel portions of Pipelines 1 and 2 in the San Luis Rey river valley and Pipeline 1 in Couser Canyon and the Lake Hodges river valley, requiring the
development of pipeline access portals. At each access
portal, removed approximately 40 feet of existing steel pipe to provide access to the pipe’s interior. Borings were needed at the proposed portal locations to support
construction excavation activities. Due to the steep
terrain at several portals, concrete anchor blocks were constructed before removing the pipe. A new concrete
vault replaced the existing structure at most portals.
On-Call Structural Engineering Services, Mesa
Water District, Costa Mesa and Huntington
Beach, CA. Structural Engineer. Provided On-Call
Structural Design Services for Mesa Consolidated Water
District who serves an 18-square mile service area in
north Orange County, which includes distribution of a
combination of imported water, local groundwater, and
recycled water to approximately 23,500 retail accounts
for a population of over 110,000. Task orders included
structural assessment for access hatch additions to
four existing valve vault roofs and the preparation of
plans, specications, and an estimate of the probable
construction cost for the replacement of the precast
concrete lids at four existing buried control valve vaults.
Regulatory Site Chlorination Facility, Otay Water
District, Spring Valley, CA. Structural Engineer.
Oversaw the design modication of an existing pump
station/chlorination facility to accommodate the addition of two 5,000 gallon hypochlorite tanks and two 1,269
gallon aqua ammonia tanks for the purpose of converting its chlorine gas system to a liquid chlorine and aqua
ammonia system.
Milliken Pump Station, Chino Basin Desalter
Authority, Ontario, CA. Structural Engineer. Design of
a building for a booster pump station with separate pump and electrical rooms. The building has concrete block
walls and a steel framed roof structure. Consideration was given to the appearance of the building to complement
the existing well building and 2.9 MG prestressed
concrete tanks which share the site with the Milliken
Pump Station. Mr. Ramirez was also on the structural
design team for these existing structures.
Lake Hodges Hydroelectric Generation Facility
and Pump Station Remediation, San Diego
County Water Authority, San Diego, CA. Structural
Project Engineer. Task orders provided for the Lake
Hodges Facility as part of the As-Needed Structural
Engineering Contract with the San Diego County Water
Authority. The facility, a multi-story structure (1 level above grade and 8 levels below grade), houses two 20 MW
pump-turbine units along with various electromechanical subsystems. Task Order 01 provided for the safety of the plant operations sta, which included re-life-safety,
fall-protection, and water proong improvements.
Task Order 02 included equipment handling and liing
hardware restraints and removal and replacement
of existing electrical insulation panels. These task
orders required extensive eld work, the preparation
of comprehensive reports, and discussions with the
client, in order to assist with the selection of the most suitable alternative for each item before proceeding
with the preparation of the nal plans, specications, and estimate.
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
RESUMES TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 City of Downey
QA/QCTEAM
Alan Ludwig, PE (Continued)
Groundwater Treatment Plant Modifications
GAC for MTBE Removal, San Juan Capistrano,
CA. Construction Manager. Construction Manager for
the modication to the Groundwater Treatment Plant to
remove the MTBE found in the feed water. The 5.3 mgd
system includes eight 10-feet diameter GAC vessels with feed, backwash, and euent piping.
Well No 9 Nanofiltration and GAC Water
Treatment Plant, Signal Hill, CA. Construction
Project Manager. Construction Project Manager for or
the treatment of water with high color from Well No.
9. The objective of the treatment is to producepotable
water with color below a 5-color units without signicant reduction of concentration of dissolved ions.
Design-Build of Well Nos 21 and 22 and Reverse
Osmosis Treatment Plant, Irvine Ranch Water
District, Irvine, CA. Project Manager. Project Manager
for the Wells 21 and 22 RO Treatment Plant, providing
overall design management and client coordination
for a brackish groundwater treatment facility. The
water treatment plant consisted of: cartridge lters,
pretreatment chemical systems, high pressure feed
pumps, RO treatment trains, membrane clean-in-place
system, decarbonators, post treatment chemical systems, concentrate disposable system, SCADA, clearwell,
product water pump station, plant discharge system
to storm drain, treatment plant building, auxiliary
building structures, and electrical and instrumentation.
The RO Treatment Plant is sized to produce 6.27 MGD
of product water. Water will be TDS and nitrates. The
project included design of plans, specications, and an engineer’s cost estimate.
Groundwater Recovery Program Desalination
Facility, South Coast Water District, Laguna
Beach, CA. General Contractor. General Contractor
for construction of the 1.3 mgd groundwater recovery
RO membrane desalination facility, expandable to 1.7
mgd. This Design-Build project constructed by Pascal &
Ludwig included chemical pretreatment, cartridge lters, RO membrane treatment plant, decarbonators, chemical
stabilization masonry building and nal product water
pump station. An iron/manganese treatment process
is utilized for the bypass stream and blended to the RO treated water prior.
Deep Aquifer Treatment Plant (DATS), Irvine
Ranch Water District, Irvine, CA. General
Contractor. General Contractor for the DATSDesign-
Build project, encompassing the design of a membrane
treatment facility capable of producing 8,000 acre-feet of groundwater per year. The treatment process consists of chemical pre-treatment, cartridge lters, high pressure feed pumps, spiralwound membranes with color and
organics injection characteristics (nanoltration),
post treatment using forced air degasiers, and a nal
product pump station. The project includes equipping
two previously drilled groundwater wells, pipelines
and connections for feed water, product water and
concentrate disposal; combination masonry and
manufactured metal treatment building; sitework; and
landscaping. His project responsibilities include all civil, mechanical, structural, and electrical design, as well as overall design management for this project.
Temescal Desalter, Ionics, Inc, CA. Project Manager.
Managed the design of a 10 MGD reverse osmosis
desalter to treat local well water. Responsible for design of the Desalter, associated on-site and o-site facilities, and the communication and telemetry systems between
the Desalter complex, the wells, and the Lester Water
Treatment Plant.
Piru Wastewater Treatment Plant, Ventura
County Water Works District #16, Piru, CA. Project
Manager. Project Manager for this Design-Build project
that consisted of constructing a 0.5 mgd wastewater
treatment plant in order to upgrade and expand the
existing Piru Wastewater Treatment Plant. New facilities were constructed on 4 acres of land immediately east
of the existing treatment plant. Project elements include an oxidation ditch activated sludge process, secondary
clariers, digester tanks, sludge dewater facility, euent pump station,onsite pipelines, Operations building,
electrical and instrumentation.
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
RESUMES TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 City of Downey
ELECTRICALLEAD
Mazen Kassar, PE (Continued)
PFAS Study for Wells ET-1, ET-2 and 78, Irvine
Ranch Water District, Irvine, CA. Lead Electrical
Engineer for a study to determine the options to add PFAS treatment to an operating VOC air stripper project. Well ET-1 operates at 2.0 MGD through one tray air stripper
that discharges into a small wet well with a single booster pump station. The existing plant is located on a small lot with limited space. Project included analysis of water
quality, options for IX or GAC treatment and analysis of adding wells ET-2 and 78 to the project if they become
aected by PFAS. Capital and O&M costs were also
prepared.
Sherrill Well PFAS Water Treatment, Orange
County Water District, Stanton, CA. Electrical
Engineer. Design and construction services for facility designed to produce 500 GPM using an IX System
with a bag lter pretreatment and existing chemical
feed system for disinfection. Electrical design includes relocation of the existing motor control center and
control panel and installation of new lighting.
PFAS Treatment at John Garthe Reservoir, City
of Santa Ana, CA. Senior Engineer. This project is for
the nal design to provide PFAS treatment at the John
Garthe site. The site is supplied by 5 wells to produce up to 13.8 MGD. The new centralized treatment plant
will remove PFAS from the well supply line prior to
storage at the reservoir. Treatment equipment includes
5 micron cartridge lters, ion exchange pressure vessel contactors, and new on-site generation, storage and
feed facilities for sodium hypochlorite. The existing well pumps have been evaluated on an individual basis and
are being replaced or modied as needed to meet the
demands of the new treatment plant and the system.
Progressive Design-Build, Advanced Water
Purification Facility at RP-4 Phase 1, Inland
Empire Utilities Agency, Chino, CA. Electrical
Engineer. Design Engineer of Record for the Phase 1
Progressive Design-Build Advanced Water Purication
Facility (AWPF) at RP-4, developing the Basis of Design, 30 percent and 60 percent design packages for this
cornerstone of IEUA’s Chino Basin Program to enhance
regional water-supply reliability and groundwater
sustainability. The AWPF will produce 15,000 acre-feet
per year (AFY) of puried water by treating RP-4 tertiary euent, Title 22 tertiary water from RP-1 and RP-4 via
IEUA’s recycled water backbone, and Tertiary euent from the Rialto WWTP.
Well Improvements and Treatment, City of
Compton, CA. Electrical Engineer. This task order
contract is to analyze the water infrastructure and
evaluate its water production, conveyance, storage, and distribution infrastructure, including its production wells and associated groundwater quality, as well as provide
design, permitting, and construction management
services. The rst task is to evaluate the City’s eight production wells for water quality, including potential contaminants such as VOCs, 1,4-dioxane, PFAS, and
other organic and inorganic substances. It involves
assessing the wells’ production capacity, integrity, and condition, providing recommendations for rehabilitation and repairs to meet and exceed State and Federal water
quality standards. Additionally, the evaluation extends to the City’s water-related infrastructure, encompassing security, safety, distribution systems, storage facilities, and SCADA systems, with recommendations for
necessary upgrades or replacements.
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
RESUMES TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 City of Downey
ELECTRICALENGINEER
James Roberts, EIT (Continued)
WMWD W-316 North Well 2 Water Treatment
Plant, Western Municipal Water District,
Murrieta, CA. Mr. Roberts provided electrical
engineering design support for the nal design of the
groundwater treatment plant. Tetra Tech was tasked to
provide the design for upgrading the existing North Well 2 site to treat iron and manganese with the addition of oxidation/ltration system. North Well 2 is a total water supply well operated by WMWD and has a pumping
design capacity of 600-750 GPM. The City of Murrieta
has a service area of 2,538 connections and Division of WMWD is designed to deliver pumped groundwater and
imported treated water to its customers under maximum
day demand, re ow, and peak hour conditions.
Electrical design included incorporating low voltage
power distribution and instrumentation components
of the new treatment facility into the existing systems.
Voltage-drop calculations were performed to determine
power wiring sizing. Duct bank, conduit and wire
sizes were determined to distribute power, controls
and communications across the site. Final plans,
specications, and cost estimated were prepared for the client.
La Salina Wastewater Treatment Plant
Decommissioning and Li Station, Oceanside,
CA. Ongoing. Mr. Roberts provided Electrical
engineering support for the La Salina Wastewater
Treatment Plant (LSWWTP), originally constructed in
1948. LSWWTP served as the connection point for
multiple regional discharge pipelines including treated euent from Fallbrook, Camp Pendleton, and the San
Luis Rey Water Reclamation Facility (SLRWRF). This project consists of demolishing the LSWWTP and replacing it
with a new 5-MGD raw wastewater li station to convey
wastewater from the LSWWTP collection area to SLRWRF.
The scope of work also includes the relocation of an
existing 1-MGD UV storm water treatment facility and
preliminary design of a new 24-inch HDPE force main
that will be used to convey the raw wastewater to the
SLRWRF. The additional ows to the SLRWRF will also
benet future reclaimed water treatment expansion
and indirect or direct potable reuse near the Mission
Basin Desalting Facility. The electrical design consisted power distribution to VFDs controlling li station
pumps, control panels, li station building lighting. An ememegrency generator system was designed for the
li station. Voltage-drop calculations were performed
to determine power wiring sizing. Wire and conduit
sizes were determined to distribute power, controls and communications across the site. Lighting photometric
calculations were performed to determine the best
lighting distribution for site facilities.
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
RESUMES TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 City of Downey
STRUCTURAL ENGINEERINGLEAD
Eric Yuen, PE, SE (Continued)
Yorba Linda Water District Headquarters Plant (Design
Completed: 2020; In Operation since 2022): This
system will treat water from 10 wells with a total
capacity of 17,400 GPM. An IX System consisting of
11 pairs of Lead/ Lag Vessels (22 vessels total), bag
lter pre-treatment, booster pump station, and new
onsite generation system for chlorine disinfection. In
order to get the system on the existing site an extensive analysis of the site improvements was completed. The
construction of the new PFAS treatment facility involves partial demolition of the existing concrete slab.
SGU PFAS Treatment Plant, Irvine Ranch Water
District, Irvine, CA. Structural Engineer. Tetra Tech is providing design and construction support services for the District’s 12 shallow wells aected by very high VOC levels and PFAS located on site of former El Toro Marine Base.
Design included GAC treatment and the replacement of a
existing air stripper system. Permitting was required from City on pipeline.
PFAS Treatment at John Garthe Reservoir, City of
Santa Ana, CA. Structural Engineer. This project is for the nal design to provide PFAS treatment at the John Garthe site.
The site is supplied by 5 wells to produce up to 13.8 MGD.
The new centralized treatment plant will remove PFAS from the well supply line prior to storage at the reservoir. Treatment equipment includes 5 micron cartridge lters, ion exchange pressure vessel contactors, and new on-site generation, storage and feed facilities for sodium hypochlorite. The existing well pumps have been evaluated on an individual basis and are being replaced or modied as needed to meet the demands of the new treatment plant and the system.
Centralized PFAS Treatment Plant for Persimmon
Well 1 and Farna Wells 1 and 2, Golden State
Water Company, Arcadia and Temple City, CA.
Lead Structural Engineer. Engineering design for PFAS
treatment system improvements at Farna Wells 1 and 2
and Persimmon Well 1 sites within Foothill/South Arcadia Water System. Building on PFAS Evaluation Study, project involves preparation of prepurchase documents, design
plans, technical specications, and bid documents for
centralized GAC treatment facilities. Work includes
evaluation of pumping capacity, motor control center
sizing, transmission main design, and preparation
of Division of Drinking Water waiver documentation
as needed. Design ensures treatment performance
compliance, capacity reliability, and consistency with
client’s systemwide PFAS mitigation strategy.
PFAS Arlington Desalter Plant, Western
Municipal Water District, Riverside, CA. Lead
Structural Engineer. Technical support to client for
evaluation and design of a new treatment process for
PFAS removal at a 7.25-MGD facility that utilizes reverse osmosis (RO) and blending to reduce nitrate and total
dissolved solids in groundwater from unadjudicated
Arlington Sub-basin, supplying potable water to Cities
of Norco and Corona. Provided engineering review
of proposed ion exchange treatment system for PFAS
removal from RO bypass stream, including assessment
of operational compatibility, hydraulic integration, and treatment performance. Performed evaluation of sizing,
siting, cost, and permitting considerations to support
amendment of facility’s domestic water supply permit.
Recommendations addressed pilot testing, system
optimization, and alignment with upcoming EPA and
California Division of Drinking Water PFAS regulations to ensure regulatory compliance and continued delivery of
safe, high-quality drinking water.
PalmyritaWTP PFAS Removal, City of Riverside,
CA. Lead Structural Engineer. Design, construction
management, and inspection services for site
modications at WTP for PFAS removal. Site expansion to treat raw water from four wells in North Orange Well Field aer it is blended with euent from WTP.
Sherrill PFAS WTP Design, Orange County Water
District, Anaheim, CA. Lead Structural Engineer. Final
design to provide PFAS treatment at Sherrill Well. 500- GPM plant treats ow from one well through 5-micron
bag lter and ion exchange pressure vessel contactors.
Well pump replaced to support delivery of water through treatment and directly into distribution.
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
RESUMES TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 City of Downey
STRUCTURAL ENGINEER
Geo Heinen, PE (Continued)
Well 28 Equipping, PFAS Treatment Facility,
and Well Building Final Design, City of Orange,
CA. Structural Design Engineer. Prepared bid submittal
design plans, specications, and estimates. Project
included a well pump and PFAS treatment areas. Provided a building to shelter all electrical equipment and chemical equipment. Assisted with preparation of structural
calculations and drawings for all structural components including CMU block building with a exible steel
diaphragm roof, IX treatment area walls and foundation, pretreatment area concrete foundation, boundary CMU
wall and footings, and various structural steel pipe racks.
Provided structural support during construction including reviewing submittals, responding to RFIs, and performing structural observations.
Fullerton Main Well Nos 5, 6, and 8 PFAS, Orange
County Water District, Fullerton, CA. Lead
Structural Design Engineer. Design and construction
services for plant to treat six on-site wells with a total capacity of 10,100 GPM. PFOS, PFOA, and VOCs to be
removed using 6- to 12-foot-diameter, 100,000 Ib. GAC
vessels to discharge into a forebay and then be pumped
into the distribution system. The GAC Vessels will be
added on to the existing concrete mat foundation with
the Bolted Steel Water Tank. Tetra Tech designed the
new concrete mat foundation, structural steel pipe racks and anchorage design. Provided construction support
services to assist in submittal review and technical
assistance to answer RFIs.
Well No 1 PFAS, City of Bell Garden, CA. Structural
Design Engineer. Prepared plans and specications for
construction of a PFAS system. Engineering services
included IX vessel and pretreatment baglter foundations and anchorages, pipe racks, and other structural supports.
Fullerton Kim 2 PFAS, Orange County Water
District, Fullerton, CA. Lead Structural Design
Engineer. Prepared plans and specications for
construction of a PFAS system. Fullerton Kim 2 plant treats eight on-site wells with a total capacity of 10,100 GPM.
PFOS, PFOA, and VOCs removed using 6- to 12-foot-
diameter, 40,000 Ib. IX vessels discharge into a forebay and then pumped into distribution system. Remaining
wells treated with an Ion Exchange system consisting
of eight vessels and bag lters for pre-treatment. New
wellhead construction required demolition of light frame metal pump building and concrete pump pedestal.
Additionally, a new Electrical CMU Building was designed to house all updated electrical equipment. Provided
construction support services to assist in submittal review and technical assistance to answer RFIs.
Serrano Water District PFAS, Villa Park, CA.
Structural Design Engineer. Prepared plans and
specications for construction of a PFAS system. Serrano WD Plant treats six on-site wells with a total capacity of 10,100 GPM. PFOS, PFOA, and VOCs removed using
6- to 12-foot-diameter, 40,000 Ib. IX vessels discharge into a forebay and then pumped into distribution
system. Remaining wells treated with an Ion Exchange
system consisting of eight vessels and bag lters for
pre-treatment. New wellhead construction required
demolition of light frame metal pump building and
concrete pump pedestal. The Ion Exchange Vessels were
placed within a concrete substructure to hide all piping from the residential areas and provide more space for
the Water District to operate. Provided construction
support services to assist in submittal review and technical assistance to answer RFIs.
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
RESUMES TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 City of Downey
MECHANICAL ENGINEER
Peter Yu, PE (Continued)
Palmyrita Water Treatment Plant PFAS Removal,
Riverside, CA. Project Engineer. The City of Riverside
has authorized Tetra Tech to provide design, construction management and inspection services for site modications at the Palmyrita WTP for Per- and Polyuoroalkyl
Substances (PFAS) removal. The expansions to the site will treat the raw water from the existing four (4) wells in the North Orange Well Field aer it is blended with the euent from the existing Palmyrita WTP.
Companywide PFAS Evaluation, Golden State
Water Company, Various Locations, CA. Project
Engineer. Provided technical support to Golden State
Water Company (GSWC) for assessment and evaluation
of treatment strategies to manage Per- and Polyuoroalkyl Substances (PFAS) detected in groundwater at multiple
well sites. The project involved review of well and water quality data, distribution system operations, and site
layouts to develop recommendations for compliance with
new EPA PFAS drinkingwater regulations. Work included
evaluation of treatment technologies, sizing and siting considerations, cost analysis, and assessment of alternative management strategies to support informed decision-
making and sustainable long-termPFAS mitigation.
PFAS On Call Contract, Orange County Water
District, CA. Project Engineer. IX/GAC treatment for
PFOS and PFOA design for 18 aected wells in Main
Orange County Basin. Design, estimating of capital and
operating costs, coordinating with vessel suppliers, and construction management for following projects:
9 Serrano Water District Well #5 and #9. 3,000-GPM IX
System with a bag lter pre-treatment, 3,000-GPM
booster pump station and new chemical feed system for
disinfection.
9 Kimberley Well 1A. Located on a very small site with a single well, facility is designed to produce 3,000 GPM
using an IX System with a bag lter pre-treatment and new chemical feed system for disinfection.
9 Yorba Linda Water District Headquarters Plant. System will treat water from 10 wells with a total capacity of 17,400 GPM. An IX System consisting of 11 pairs of lead/ lag
vessels (22 vessels total), bag lter pretreatment, booster pump station, and new on-site generation system for
chlorine disinfection. Completed an extensive analysis of site improvements.
9 Fullerton Main Plant. Design and construction services for the following wells: Well 3A – 2,250 GPM, Well 4 – 1,400 GPM (being rehabilitated), Well 5 – 1,500 GPM, Well 6 – 1,400 GPM, Well 7 – 1,700 GPM (o-line), Well 8 – 2,500 GPM, and Well 7A – Proposed. Five of the wells (4, 5, 6, 7 and 8) produce water with TCE and other VOCs. Wells
with higher concentrations of TCE are blended with
wells with lower concentrations of VOCs in a blending
forebay structure. Fullerton has an approved blending as part of their Division of Drinking Water permit. Well 3A pumps directly to the distribution system and Well 7 can pump to either the forebay or the distribution system. In accordance with this information, providing design and
construction services.
Well 10 and Kimberly Well 2 Design, City of
Fullerton, CA. Project Engineer. Design services for
new Well Number 10 and pipeline to Well Kim 2 PFAS
treatment plant.
Kimberly Well 1A WTP, City of Fullerton, CA.
Project Engineer. Design and construction services for
facility designed to produce 3,000 GPM using an IX
System with a bag lter pretreatment and new chemical
feed system for disinfection. Single well is on a very small site.
PFAS Treatment at John Garthe Reservoir, City
of Santa Ana, CA. Project Engineer. Final design to
provide PFAS treatment at the John Garthe site. The site is supplied by 5 wells to produce up to 13.8 MGD. The
new centralized treatment plant will remove PFAS from
the well supply line prior to storage at the reservoir.
Treatment equipment includes 5-micron cartridge
lters, ion exchange pressure vessel contactors, and
new on-site generation, storage and feed facilities for sodium hypochlorite. The existing well pumps have been
evaluated on an individual basis and are being replaced or modied as needed to meet the demands of the new
treatment plant and the system.
PFAS Compliance Study, City of South Gate,
CA. Project Engineer. Study to determine options to
add PFAS treatment to four wells aected by PFOS and
PFOA. Study included water quality analysis, review
of well pumps and motors, analysis of centralized
treatment option, site layouts, development of capital
and operations costs, as well as costs for 1,4-Dioxane
treatment if needed in future.
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
RESUMES TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 City of Downey
CIVILENGINEER
Erica Jenkins, EIT (Continued)
5th Street Water System Improvements, City of
Downey, CA. 2021. Project Engineer. Prepared plans
and specications for water system improvements on
5th Street from Downey Avenue to Brookshire Avenue.
Improvements included installation of new ductile
iron main, associated ttings, gate valves, re hydrant assemblies, copper water service lines, meters, and
boxes; and connection to mains at all intersections.
Improvements completed on 5th Street from Brookshire
Avenue to Lakewood Boulevard included installation
of new re hydrant assemblies, copper water service
lines, meters, and boxes. Improvements on Birchdale
Avenue from 6th Street to Downey High School included
installation of new ductile iron main, associated ttings, gate valves, re hydrant assemblies, and air release
assemblies; and connection to mains at all intersections.
Improvements on Marbel Avenue Cul‐de‐sac included
installation of new re hydrant assembly, blow‐o
assembly, copper water service lines, meters, and boxes.
Florence Avenue Water System Improvements,
City of Downey, CA. 2020–2024. Project Engineer.
Prepared plans and specications for 2,500 LF of new
8-inch water main. Improvements proposed on Florence
Avenue from Tweedy Lane to Brookshire Avenue included
installation of re hydrant assemblies, copper water
service lines, meters, and meter boxes; reconnection to mains at all intersections; abandoning water main, and
removal and salvaging of re hydrant assemblies, water
meters, and meter boxes.
Citywide Sewer Improvements, City of Downey,
CA. Project Engineer. Prepared plans and specications
for removal/replacement of sewer pipe with new sewer
pipe, sewer spot repairs (30 locations), and installation of new manholes. Project included pothole investigation services and preparation of record plans.
Water Main Replacements, City of Lakewood,
CA. Design Engineer. Replacement of approximately
156,000 LF of old cast iron water pipelines. Prepared
construction drawings, plans, specications and
engineer’s construction cost estimates for ve phases
for each Capital Improvement year since 2001. Water
mains replacement ranged between 4 and 16 inches in
diameter. Proposed pipeline alignment selected based
on available utility corridor; constructability; short-term trac impacts to community; and City of Lakewood
trac/pavement replacement requirements. Adequate
horizontal and vertical clearances maintained in
accordance with State of California Department of Public Services. New services and re hydrants eld located to minimize disruption to public property and residents.
Fairhaven Plant, Discharge Piping Evaluation,
Golden State Water Company, City of Orange,
CA. 2022. Project Coordinator. Replacement of a
90-year-old, 18-inch well discharge line that conveys
water from Fairhaven Plant easterly under SR-55 to
distribution system on Fairhaven Avenue. Integrity of
18-inch water main was in question so provided feasible options for replacement/rehabilitation. Reviewed video
inspection of 18-inch steel pipe, pipeline plans, Fairhaven Plant plans, plans of parallel City of Tustin 10-inch water main, East Orange County Water District (EOCWD) 20-
inch water main, and EOCWD Fairhaven-Newport Flow
Control Facility. Obtained available relative right-of-way maps and Tract Maps. Contacted agencies including
Caltrans regarding permitting process for installation
of a pipeline within bridge utility corridor and City of Orange regarding ramp ownership from Ethelbee Way
to Marshall Lane. Prepared a technical memorandum
outlining three alternatives to replace aging well
discharge line.
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
RACHEL DRAFTING
2-PAGE RESUMES, TO BE
INCLUDED IN DRAFT 2
APPENDIX
GFE DOCUMENTATION
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 CITY OF DOWNEY xxv
GFE Documentation
Tetra Tech implemented all six Good Faith Eorts to ensure DBE rms were informed about the solicitation, oered assistance with required materials, and engaged in discussions regarding teaming opportunities. Below is a summary of each eort, Tetra Tech’s actions, and supporting documentation highlighting the outcomes.
EFFORT 1.
LIST OF CERTIFIED BUSINESSES/OUTREACH LOG
FIRM CERTS NAME
OUTREACHDATE RESPONSE
Carbon Activated Corp. CADIR, CABE, MBE Dale Kerr 6/18 None Converse Consultants MBE, SBE Kathy Von Glahn 6/18
Indicated interest; provided RFP
documents
Corporate Guidance
Solutions MICRO, VSBE, VBE Josh Brody 6/18 Firm indicated no interest LEE & RO,Inc. MBE,CADIR CrystalThomas 6/18 None
NoLimit Construction DGS, MICRO, FSD,
CADIR Sergio Duarte 6/18 None
Northern Digital, Inc.DGS, MICRO, FSD,
CADIR Enrique Hernandez 6/18 None
Stetson Engineers, Inc. DGS Sharon Johnson 6/18 None
TKE Engineering DGS, LOCAL Genesi Lozano 6/18 None
Watearth, Inc. DBE, SBE, WBE Jennifer Walker 6/18 Firm indicated interest Yorke Engineering, LLC WBE, CADIR, DGS Ashley Beck 6/18 Firm indicated they do not provide services
EFFORT 2.
Ensure DBEs are made aware of contracting
opportunities to the fullest extent practicable
through outreach and recruitment activities.
For Indian Tribal, State, and Local Government
recipients, this will include placing DBEs on
solicitation lists and soliciting them whenever they
are potential sources.
Tetra Tech developed a solicitation list that included
relevant certied businesses, businesses that were in
local and rural areas, and businesses that performed
services that could be included during any phase of work.
In addition, Tetra Tech included rms that had working
knowledge of Cityrequirements, had partnered with Tetra Tech on previous projects, attended the pre-proposal
meetings, or requested inclusion in the project.
Make information on forthcoming opportunities
available to DBEs, arrange time frames for contracts,
and establish delivery schedules, where the
requirements permit, in a way that encourages and
facilitates participation by DBEs in the competitive
process. This includes, whenever possible, posting
solicitations for bids or proposals for a minimum of
30 calendar days before the bid or proposal closing
date.
As a GFE to promote the project to subconsultants
qualied in the identied work areas, an online
advertisement was published with a daily publication
known as SBE Today and a weekly publication known as
Small Business Exchange.
Acopy of this ad is included on the following page.
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6
TETRA TECH
Systemwide Water Supply Treatment Improvements | CIP Projects Nos. 24-22 & 26-28 CITY OF DOWNEY xxvi
EFFORT 3.
Consider in the contracting process whether rms competing for large contracts couldsubcontract with DBEs. For Indian Tribal, State, and Local Government recipients, this will include dividing total requirements when economically feasible into smaller tasks or quantities to permit maximum participation by DBEs in the competitive process.
The strategies used by Tetra Tech to ensure meaningful subconsultant utilization for this contract are founded on our commitment to provide the maximum exposure and comprehensive role within our project team. The list included the following work areas.
1. Survey
2. Geotechnical Investigations
3. Structural Design
4. Electrical Design
5. Civil Design
6. Surge Analysis
7. Permitting
8.Potholing
9. Trac Control
These established works areas were the basis to our GFE outreach to solicit subconsultants who could be used for these services.
EFFORT 4.
Encourage contracting with a consortium of DBEs when a contract is too large for one of these rms to handle individually.
Upon receipt of DBE proposals we will review and determine if a consortium of DBEs is needed to support inclusion.
EFFORT 5.
Use the services and assistance of the SBA and the Minority Business Development Agency of the Department of Commerce.
Tetra Tech conducts GFE regularly as part of its response to various business and subconsultant inclusion program requirements. The SBA Dynamic Small Business Search function includes self-certied small businesses, thus, making it an undesirable option to locate agency certied businesses. We used the U.S. Department of Commerce, Oce of Small and Disadvantaged Business Utilization (OSDBU) to locate local agencies to outreach to. Our experience has been that this method of outreach resulted in the least favorable responses.
EFFORT 6.
If the prime contractor awards subcontracts, require the prime contractor to take the previous steps.
See steps 1-5 above.
Docusign Envelope ID: F8D37329-4E8A-8850-81DA-9971867121F6