City Council Memorandum
TO: HONORABLE MAYOR AND CITY COUNCIL DATE: SEPTEMBER 16, 2025 FROM: PUBLIC WORKS DEPARTMENT WARDS: ALL
SUBJECT: SECOND AMENDMENT TO PROFESSIONAL CONSULTANT SERVICES AGREEMENT FOR WATER QUALITY MONITORING AND REPORTING SERVICES FOR THE CLOSED TEQUESQUITE LANDFILL WITH GEO-LOGIC ASSOCIATES, INC., ONTARIO, CALIFORNIA, EXTENDING THE TERM THROUGH JUNE 30, 2026, IN THE AMOUNT OF $93,123 FOR A TOTAL CONTRACT AMOUNT OF $302,362 ISSUE:
Approve the Second Amendment to Professional Consultant Services Agreement with Geo-Logic Associates, Inc. of Ontario, California, for water quality monitoring and reporting services for the closed Tequesquite Landfill extending the term through June 30, 2026, in the amount of $93,123 for a total contract amount of $302,362.
RECOMMENDATIONS:
That the City Council:
Approve a Second Amendment to a Professional Consultant Services Agreement with Geo-Logic Associates, Inc., of Ontario, California, for water quality monitoring and reporting services for the closed Tequesquite Landfill extending the term through June 30, 2026, in the amount of $93,123 for a total contract amount of $302,362; and Authorize the City Manager, or his designee, to execute the Second Amendment to the Professional Consultant Services Agreement and any additional documents necessary for the Agreement, including amendments and extensions and making minor and non-substantive changes.
BACKGROUND:
The closed Tequesquite Landfill (Landfill) is a 120-acre Class III landfill owned and operated by the City of Riverside. The Landfill, which was active from 1947 to 1985 is maintained in its closed state through a site-specific Closure/Post-closure Maintenance Plan approved by the California Department of Resources Recycling and Recovery, the Riverside County Department of Environmental Health, and the California Reginal Water Quality Control Board. The Maintenance Plan describes post-closure activities necessary to comply with the requirements of Title 14 of the California Code of Regulations, Title 23 of the California Code of Regulations, and Title 40 of the Code of Federal Regulations, each administered separately by the aforementioned agencies where their jurisdiction applies.
The Maintenance Plan requires the City to maintain the landfill as a closed site and complete the following on-going activities:
Landfill gas collection and migration control which includes collection, destruction, monitoring and reporting of methane gas produced by the landfill (work performed under contract with second vendor).
Groundwater quality monitoring at, and within, the vicinity of the landfill.
On May 13, 2021, staff issued Request for Proposals (RFP) No. 2098 for a qualified firm to provide regulatory required groundwater quality monitoring, sampling, and reporting services for the Landfill.
On November 2, 2021, the City Council awarded (RFP) No. 2098 to Geo-Logic Associates, Inc., of Ontario, California. Geo-Logic was selected as the most qualified respondent due to a demonstrated ability to perform the items required in the scope of work, project approach, and cost of services. The Professional Consultant Services Agreement was executed in the amount of $149,989 for a term through June 30, 2024.
On July 1, 2024, the First Amendment to Professional Consultant Services Agreement was executed to extend the term by one (1) year to June 30, 2025 and to add additional compensation in the amount of $59,250.
DISCUSSION:
The groundwater quality monitoring, sampling, and reporting for the Landfill is an integral part of the regulatory compliance program required by the California Department of Resources Recycling and Recovery, the Riverside County Department of Environment Health, and California Regional Water Quality Control Board.
By way of the requested services, groundwater, surface water, and landfill gas condensate sampling activities, laboratory analyses, and reporting preparation tasks for the Landfill will continue to be conducted in accordance with Title 27 of the California Code of Regulations and Monitoring and Reporting Program (MPR) 98-99-06, issued specifically for the Tequesquite Landfill by the Regional Water Quality Control Board – Santa Ana Region.
Geo-Logic Associates, Inc., has met the expectations of the RWQCP Regulatory Compliance staff during the initial contract term of November 4, 2021, to present.
Purchasing Resolution 24101 Section 1104 “Change Orders” states that “Modifications to a Purchase Order shall be made only by Change Order. Subject to the availability of funds, Change Orders may be utilized for purposes of…(2) modifying unit prices , [or] …(5) modifying contract completion time or the term of a Contract. Unless otherwise specifically authorized by the Awarding Entity, Change Orders which cumulatively exceed the following will require Awarding Entity approval: (c) 10% of the original contract price for Contracts and/or Purchase Orders previously approved by the Awarding Entity and the total Change Order amount will not exceed $150,000.” The Purchasing Manager concurs that the recommendations to approve the agreement comply with Purchasing Resolution 24101, Section 1104.
FISCAL IMPACT:
The total fiscal impact of this action is $93,123. There are sufficient funds in the Refuse Fund, Solid Waste - Refuse Disposal, Professional Services Regulatory Compliance account 4130200-421043.
Prepared by: Victoria Villegas, Administrative Analyst
Approved by: Gilbert Hernandez, Public Works Director
Certified as to
availability of funds: Kristie Thomas, Finance Director/Assistant Chief Financial Officer/ City Treasurer Approved by: Kris Martinez, Assistant City Manager
Approved as to form: Rebecca McKee-Reimbold, Interim City Attorney Attachment: Second Amendment to Agreement
Geo-Logic Associates, Inc. – First Amendment ● Page 2