RFP Biosolids Hauling & Disposal Services

Thurston County Public Works, Water Resources Division, Washington, is soliciting proposals for routine, continuous biosolids hauling and disposal services, with pre-proposal inquiries due November 30, 2026 and proposals due December 8, 2026 at 3:00 p.m. Pacific Standard Time. No small business, minority-owned, women-owned, or veteran-owned set-aside is identified.

Scope covers loading, transport, unloading, and disposal of Class B or non-class biosolids from the County's three plants: Grand Mound, Tamoshan, and Boston Harbor. Anticipated pickups run weekly from Grand Mound, every three months from Tamoshan, and every four months from Boston Harbor, with minimum loads of 10,000 gallons at Grand Mound and 4,500 gallons at the smaller plants. Proposers must complete a rate schedule listing per-gallon transport rates from each plant to each proposed disposal facility and per-gallon disposal fees. The County currently delivers material to Three Rivers Regional Facility in Kelso and the cities of Aberdeen and Shelton, and proposers are encouraged to identify cost-effective alternative disposal sites.

Minimum qualifications require five years of biosolids or septage hauling experience, current licensure and insurance, and no significant environmental or safety violations, terminated government contracts for cause or default, or judgments against the proposer within five years. Required coverage includes statutory workers' compensation; $1,000,000 professional liability per occurrence; $1,000,000 employers liability per accident; $1,000,000 general liability per occurrence and $2,000,000 aggregate; $2,000,000 automobile liability per occurrence; and $2,000,000 pollution coverage per occurrence and annual aggregate. The contractor must comply with Washington prevailing wage requirements under RCW 39.12 and pay subcontractors on a basis equal to or exceeding indemnity obligations to the County.

Contract value shall not exceed $900,000, with compensation at negotiated per-gallon rates. The County guarantees no minimum purchase amount. The term is up to five years, comprising an initial one-year term and four one-year renewal options exercised at the County's sole discretion. Rate adjustments are permitted no more than once annually at renewal, limited to 80 percent of the CPI-W Seattle-Tacoma-Bellevue change (December-December). The anticipated contract execution date is February 9, 2027.