CITY OF SAN MATEO
CITY OF SAN MATEO
Agenda Report
City Hall
330 W. 20th Avenue
San Mateo CA 94403
www.cityofsanmateo.org
Agenda Number: 10 Section Name: CONSENT CALENDAR Account Number: 72-4671 File ID: 25-10771 TO: City Council
FROM: Alex Khojikian, City Manager
PREPARED BY: Public Works Department
MEETING DATE: January 26, 2026
SUBJECT:
Wastewater Treatment Plant On-Call Consulting Services — Amendment RECOMMENDATION:
Approve Amendment No. 4 to the Professional Consultant Services Agreement with Carollo Engineers, Inc. for Wastewater Treatment Plant on-call consulting services in the amount of $250,000, for a new not-to-exceed amount of $1,675,000; and authorize the Public Works Director to execute the amendment in substantially the form presented.
BACKGROUND:
The City is currently under a Regional Water Quality Control Board Cease-and-Desist Order requiring improvements to its sewer collection system and Wastewater Treatment Plant (WWTP) to eliminate sanitary sewer overflows and unauthorized discharges of untreated or partially treated wastewater to San Francisco Bay. The Clean Water Program (CWP) includes several capital improvements that are currently under construction and intended to comply with the Cease-and-Desist Order.
As part of the CWP, the City has identified capital improvements needed to maintain and/or improve the WWTP reliability, performance, and safety (Projects). The agreements for on-call professional services provide support for the Projects and maintenance and improvement projects implemented through the WWTP’s Operations and Maintenance groups. The required on-call professional services include, but are not limited to, alternatives analyses and engineering studies, design services, bid period services, engineering services during construction, and operational support.
On August 15, 2022, City Council approved agreements with two consulting firms; Carollo Engineers, Inc. (Carollo) and Brown and Caldwell, to provide professional consulting services in support of the City’s planned rehabilitation of the existing WWTP. Each agreement authorized a total of up to $400,000 for services performed on an on-call basis. The agreement terms are three years, with the option for two additional one-year extensions and an additional budget of up to $100,000 for each year extended. A summary of Carollo’s Task Order history and current status is provided below:
1. Carollo was awarded Task 1 – 3 Water Pumping Improvements and Task 1A – Ferric Chloride to Combined Sludge under the agreement.
2. On August 5, 2024, City Council approved Amendment No. 1 to the agreement, increasing the amount by $450,000 for a revised total agreement amount of $850,000. Carollo was awarded Task 1B - Engineering Services for Spent Backwash Pumps and Ferric Chloride Day Tank and Transfer Pump, Task 1C – Additional Potholing, and Task 2 - WAS Thickening Alternatives Analysis Project.
3. On June 25, 2025, City Council approved Amendment No. 2 to increase the agreement amount by $475,000 for a revised total agreement amount of $1,325,000. Carollo was awarded Task Order 3 - Dewatering System Centrifuges 1 and 2 Replacement Project. On August 31, 2025, the first one-year extension option was exercised through Amendment No. 3 to the agreement, increasing compensation by $100,000, for a new revised agreement
CITY OF SAN MATEO
total of $1,425,000.
In December 2025, the 3-Water Pumping and Ferric Chloride to Combined Sludge Line Project was awarded for construction. Carollo will provide engineering services during construction for this phase. For Carollo to provide engineering services for these tasks, an increase of $250,000 to the on-call agreement is recommended to complete this work and address any potential unforeseen issues in the project. This would result in the revised total agreement amount of $1,675,000.
BUDGET IMPACT:
There are sufficient funds available in the CWP WWTP Annual Major Components Project (46t090) budget.
ENVIRONMENTAL DETERMINATION:
The proposed action is exempt from environmental review under the California Environmental Quality Act (CEQA), since entering on-call professional services agreements is an organizational or administrative activity that will not result in direct or indirect significant physical changes in the environment. (CEQA Guidelines Section 15378(b)(5).) In addition, on June 6, 2016, the City Council certified a Final Programmatic Environmental Impact Report (Final PEIR) (SCH No. 2015032006), which serves as the primary environmental compliance document for implementation of the Clean Water Program. On July 16, 2018, the City approved Addendum 1 to the Final PEIR, and on April 15, 2019, approved Addendum 2. Any resultant capital improvement or operations and maintenance-related projects resulting from the on-call professional consulting services shall be reviewed on an individual basis or evaluated for consistency with the PEIR and Addenda.
NOTICE PROVIDED
All meeting noticing requirements were met.
ATTACHMENTS
Att 1 – Amendment No. 4
STAFF CONTACT
Thomas Ruark, Senior Project Manager
[email protected]
650-522-7280
Thomas W. Williams, Engineering Manager
[email protected]
(650) 522-7307
James O'Connell, Deputy Director of Public Works
[email protected]
650-522-7304