Unofficial Notice of Invitation to Bid (NIB)

Riverside County is seeking bids from qualified and interested contractors for the following project titled, GENERATOR PREVENTATIVE MAINTENANCE, identified under Solicitation ID: FMARC-335. Work is to be performed near 4080 Lemon St, Riverside, CA 92501, USA in Riverside County.

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General Project Description

The County of Riverside Purchasing Department, on behalf of Facilities Management, is seeking proposals for Generator Preventative Maintenance services. The project entails performing monthly power failure tests, along with comprehensive annual preventative maintenance services across approximately 72 county-owned and operated generators situated throughout the 7,300 square miles of the County. The annual maintenance includes a mandatory 4-hour load bank test for each generator. The primary objective is to ensure the safety and functionality of facilities by preventing equipment failures and guaranteeing seamless operation during power outages. Any scheduled preventative maintenance and repair work exceeding $1,000 will be classified as a public works project, subject to prevailing wage requirements.

General Bid Items

Quantity: 1 Unit: Each Work Item: Check all fluid levels prior to transfer test for a power outage simulation.
Quantity: 1 Unit: Each Work Item: Notify County Project Manager / Site Supervisor 48 hours in advance for test approval.
Quantity: 1 Unit: Each Work Item: Contact County via phone on test day to advise and receive approval to move forward.
Quantity: 1 Unit: Each Work Item: Notify County via phone upon completion of the test.
Quantity: 1 Unit: Each Work Item: Notify County via phone if the test cannot be completed for any reason.
Quantity: 1 Unit: Each Work Item: Run generator. Specifications: Check voltage and frequency under static operation and with the site under load.
Quantity: 1 Unit: Each Work Item: Replace oil and oil filter. Specifications: Verify oil pressure.
Quantity: 1 Unit: Each Work Item: Check antifreeze level concentration and SCA level. Specifications: Refill as needed (additional cost to County).
Quantity: 1 Unit: Each Work Item: Replace air filter.
Quantity: 1 Unit: Each Work Item: Replace fuel filter.
Quantity: 1 Unit: Each Work Item: Check all belts and hoses. Specifications: Tighten as needed.
Quantity: 1 Unit: Each Work Item: Check battery water/electrolyte level. Specifications: Load test batteries and visually inspect for leaks, cracks, bulges. Replace as needed (additional cost to County).
Quantity: 1 Unit: Each Work Item: Check battery charger operation.
Quantity: 1 Unit: Each Work Item: Check battery voltage. Specifications: Under static and run conditions.
Quantity: 1 Unit: Each Work Item: Check water temperature. Specifications: After twenty (20) minutes of operation.
Quantity: 1 Unit: Each Work Item: Check each phase of voltage at the Automatic Transfer Switch (ATS).
Quantity: 1 Unit: Each Work Item: Check block heater operation.
Quantity: 1 Unit: Each Work Item: Clean generator cabinets, removing dirt, debris, insects, etc.
Quantity: 1 Unit: Each Work Item: Clean magnetic pickup.
Quantity: 1 Unit: Each Work Item: Check coolant system pressure and test antifreeze for proper mixture and level.
Quantity: 1 Unit: Each Work Item: Complete a four (4) hour load bank testing. Specifications: To manufacturer specification and requirements, using an appropriately sized artificial load bank.

NAICS Classification

NAICS 811310 – Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance (Covers the general preventative maintenance and repair of power generation equipment, specifically generators)., NAICS 238210 – Electrical Contractors and Other Wiring Installation Contractors (Applicable due to the electrical nature of generator systems and the explicit C-10 Electrical Contractor license requirement).

Records and Due Date

This bid opportunity was entered into BidAmerica on February 2, 2026, and was last updated on February 23, 2026. All bids and/or proposals are due on February 24, 2026.

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Legal Disclaimer

All bidders are responsible for reviewing and verifying all official bid documentation directly from the issuing agency. BidAmerica aggregates public bid information for advertisement purposes for contractors and government agencies convenience. This Notice of Invitation to Bid is for reference purposes only and is not an official or complete representation of any documents issued by Riverside County. BidAmerica does not guarantee the accuracy, completeness, or timeliness of any information displayed and shall not be held liable for any errors, omissions, misinterpretations, or damages resulting from reliance on this summary. Contractors must obtain all official information—including plans, specifications, addenda, deadlines, submission requirements, qualifications, and bidding conditions—directly from Riverside County prior to bidding.