RFP-Biosolids and Residuals Hauling Services

Agency: King County
State: Washington
Type of Government: State & Local
NAICS Category:
  • 484220 - Specialized Freight (except Used Goods) Trucking, Local
  • 562111 - Solid Waste Collection
Posted Date: Feb 18, 2026
Due Date: Mar 2, 2026
Solicitation No: KC001580
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Description
Abstract: G&S Solicitation KC001580,1
Title RFP-Biosolids and Residuals Hauling Services
Solicitation Type G&S Solicitation
Status Active
Buyer Stephanie Wong
Email SWong@kingcounty.gov
Synopsis King County is soliciting proposals from interested and qualified suppliers to provide hauling services for biosolids, grit, screenings, and liquid wastewater residuals.

To attend the optional site visits on February 9, 2026, at 9:00 a.m. PT (South Treatment Plant) and February 11, 2026, at 2:00 p.m. PT (Loop Vehicle Maintenance Facility), see information in the RFP document.
Addendum Description Addendum 1 has been issued. Suppliers must acknowledge all addenda before submitting a response. If a supplier has already submitted a response, they MUST log into the E-Procurement Supplier Portal, acknowledge the addendum, and resubmit.
Attachments
KC001580-addendum 1-documents.zip (924.8 KB)
KC001580-rfp-documents.zip (10.56 MB)
Open Date 1/30/26 07:00:00 AM
Close Date 3/2/26 02:00:59 PM
Posting Date 2/18/26
Additional Information
KC Solicitation NAICS Code(s) 484110;484121;484122;484220;484230
Small Business Requirements Apply? Yes
Department NATURAL RESOURCES AND PARKS
Division WASTEWATER TREATMENT
O K
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