Unofficial Notice of Invitation to Bid (NIB)

Napa County is seeking bids from qualified and interested contractors for the following project titled, Request for Proposals For Waste Characterization Study - 2026, identified under Solicitation ID: -. Work is to be performed near 1195 3rd St room 310, Napa, CA 94559, USA in Napa County.

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General Project Description

The Upper Valley Waste Management Agency is seeking a qualified contractor to perform a waste characterization study across unincorporated Napa County and the cities of Calistoga, St. Helena, and Yountville. The study involves sampling and sorting materials generated by residential, commercial, and self-haul entities at local transfer stations and landfills within the study area. The objective is to gather baseline data on waste generation and composition to assess variations over time, and to identify specific types of organic, hazardous, and recoverable materials to inform public consumption, legislation, and education campaigns. The contractor will conduct sampling and measurements at Clover Flat Resource Recovery Park/Landfill and Devlin Road Transfer Station. The project aims to identify the diversion potential of various waste streams.

General Bid Items

Quantity: - Unit: - Work Item: Develop and describe the methodology for route sampling, sorting, and classification of commercial generators.
Quantity: - Unit: - Work Item: Implement sampling procedures for each jurisdiction, service zone, facility location, and generator type to obtain representative samples over a single season of 2026.
Quantity: - Unit: - Work Item: Define and follow a protocol for the identification of specific material types and subtypes.
Quantity: - Unit: - Work Item: Conduct a "diversion potential analysis" to identify types and quantities of materials with opportunities for replacement, recovery, repair, and/or reuse, including single-use food service ware, packages, edible food, textiles, toys, appliances, commercial equipment, and electronic components.
Quantity: - Unit: - Work Item: Identify and quantify types of Household Hazardous Waste (HHW), medical waste, e-waste, and u-waste present in transfer station and landfill streams.
Quantity: - Unit: - Work Item: Prepare a detailed project budget including company management and staffing, labor time and costs, materials, subcontractor labor time and costs, and costs for sample collection, handling, and other support.
Quantity: - Unit: - Work Item: Establish a timeline for site work, completion of evaluative work, and report submission.
Quantity: - Unit: - Work Item: Provide representative sampling and sorting of material types and subtypes at local disposal facilities that meet or exceed California industry standards for similar projects.
Quantity: - Unit: - Work Item: Compile and analyze data by measuring weight, volume, and proportions of materials in each waste stream (per jurisdiction, service zone, and generator type) using standard statistical practices and levels of confidence.
Quantity: - Unit: - Work Item: Analyze the compiled data to identify differences between jurisdictions, zones, and generator types.
Quantity: - Unit: - Work Item: Submit data in charts, graphs, and Excel spreadsheets in a format acceptable to Agency staff.
Quantity: - Unit: - Work Item: Present results in a draft report, followed by a final report.

NAICS Classification

NAICS 541620 – Environmental Consulting Services

Records and Due Date

This bid opportunity was entered into BidAmerica on January 15, 2026, and was last updated on January 27, 2026. All bids and/or proposals are due on January 30, 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 Napa 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 Napa County prior to bidding.