1 FOURTH AMENDMENT TO
PROFESSIONAL CONSULTANT SERVICES AGREEMENT
BIO-TOX LABORATORIES, INC.
CHP Alcohol Testing
THIS FOURTH AMENDMENT TO PROFESSIONAL CONSULTANT SERVICES AGREEMENT (“Fourth Amendment”) is made and entered into on __________ ________________________, by and between the CITY OF RIVERSIDE, a California charter city and municipal corporation (“City”), and BIO-TOX LABORATORIES, INC., a California corporation (“Consultant”), with respect to the following:
RECITALS
WHEREAS, the City and Consultant entered into that certain Professional Consultant Services Agreement dated January 10, 2019 (“Agreement”) for CHP Alcohol and Toxicology Testing Within Riverside City Limits (“Project”); and
WHEREAS, on November 30, 2022, City and Contractor entered into a First Amendment for CHP Alcohol Testing (“First Amendment”); and
WHEREAS, on July 1, 2023, City entered into a Second Amendment for CHP Alcohol Testing (“Second Amendment”); and
WHERES, on September 24, 2025, City entered into a Third Amendment to increase the yearly compensation amount to Fifty Thousand Dollars ($50,000) per year, or Two Hundred Fifty Thousand Dollars ($250,000) for a five-year term, ending on June 30, 2028, WHEREAS, the City and Consultant desire to amend the agreement to replace Exhibit B with updated county rate sheet.
NOW, THEREFORE, incorporating the recitals set out above, the parties hereto mutually agree to the following amendment to the Agreement.
1. Section 3, Compensation/Payment, is amended to replace the Payment Provisions, a copy of which is attached hereto as “Exhibit B-6” and incorporated herein by reference.
2. All other terms and conditions of the Agreement between the parties, which are not inconsistent with the terms of this Fourth Amendment, shall remain in full force and effect as if fully set forth herein.
[SIGNATURES ON FOLLOWING PAGE.]
2 IN WITNESS WHEREOF, the parties hereto have caused this Fourth Amendment to Professional Consultant Services Agreement to be duly executed the day and year first above written.
CITY OF RIVERSIDE,
a California charter city and municipal
corporation
By:___________________________
City Manager
Attest:_________________________
City Clerk
Certified as to Availability of Funds:
By:_____________________________
Chief Financial Officer
APPROVED AS TO FORM:
By:______________________________
Jacob Guerard
Deputy City Attorney
BIO-TOX LABORATORIES, INC., a
California corporation
By:___________________________
Its:____________________________
By:___________________________
Its:____________________________
https://riversideca.sharepoint.com/sites/CloudDocs/CaseFiles/BIO-TOX LABORATORIES, INC. (FOURTH AMENDMENT) - 315183/ContractsAgreements/Fourth Amendment to PCSA.docx NEOS#315183 JG/ta 08/2026
3 EXHIBIT “B-6”
PAYMENT PROVISIONS