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June 2024



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Phased Solid Waste Multi-Year Composition Study; SPU RFP/Contract# 24-076-S

Original Date Posted: June 20, 2024 8:00 am

Due Date:

1:00 PM Pacific Time on 7/17/2024

Request for Proposals (RFP) for
Phased Solid Waste Multi-Year Composition Study
SPU RFP/Contract# 24-076-S

Seattle Public Utilities (SPU) seeks an experienced consultant to develop sampling plans, conduct sampling, complete analyses, and prepare reports for the upcoming cycle of waste composition studies that support solid waste planning, program evaluation, and economic modeling. Accurate data from these studies is critical for informed decision-making and efficient resource allocation within Seattle’s solid waste management framework.

SPU has been conducting ongoing waste composition studies since 1988 to better understand the types and quantities of municipal solid waste disposed, and to assess the City’s recycling potential. The data from these studies is critical for developing services, policies, and programs; measuring solid waste key performance indicators; and monitoring progress toward the City of Seattle’s Solid Waste goals.

In addition, SPU conducts independent audits of the residential recycling and organic waste streams every 4-5 years to meet contractual obligations. The last residential recycling and organic waste composition studies were completed in 2020 and 2021 and are next required in 2025 and 2026.

The Phased Contract term will be approximately 5 years with an estimate contract value of $825,000 to $1,125,000.

Interested consultants are encouraged to review the solicitation, background documents, and any addenda online at

The deadline for submitting responses is 1:00 PM Pacific Time on 7/17/2024, electronic submittals are to be uploaded to the City’s Procurement Portal:

SPU PRE-SUBMITTAL CONFERENCE:  An optional pre-submittal conference will be held on 6/27/2024 from 11:00 AM to 11:45 AM Pacific Time, via MS Teams Meeting ID: 265 358 248 52, meeting passcode: ZBSwDq at URL:

Or join by phone at: +1-206-686-8357 United States, Seattle; Phone Conference ID: 137 229 108#. SPU will review the scope of work, consultant expectations, and answer questions from the prospective bidders. Although attendance at this meeting is not mandatory, attendance is highly encouraged.

Proposers may submit questions to the procurement portal (Bonfire) under the Vendor Discussions section. The City strongly prefers that consultants submit questions in Bonfire but will accept questions submitted to the Contract Administrator in email format, as well. Questions shall be directed to Sherry Shaffer,Contract Administrator & SPU’s designated contact person, at To facilitate preparation of responses to questions, please submit questions by no later than 5:00 PM Pacific Time on 7/2/2024. All responses to questions will be posted at under the Public Notices Section in the respective procurement opportunity.

Consultant selection for this solicitation will be subject to all applicable laws and ordinances. The participation of women- and minority-owned firms is a high priority cultural value of the City of Seattle and is strongly encouraged at all tiers.

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