CTP Biofilter Media Replacement

The City of Tacoma is seeking a qualified contractor to replace the biofilter media at its Central Wastewater Treatment Plant. The work includes removal and disposal of existing hog‑fuel media, supply and installation of an engineered replacement media, cleaning and minor repairs of the air‑distribution system, performance testing, and re‑balancing of the foul‑air blower. The contract value is estimated at $185,000 plus applicable taxes, with not‑to‑exceed allowances for air‑distribution repairs ($10,000) and sprinkler modifications ($5,000). Bidders must provide a 5 % bid bond, demonstrate experience on at least three similar biofilter media projects within the past ten years, and meet Washington state contractor registration and prevailing‑wage requirements. • Remove existing media, dispose per environmental regulations, and install new engineered media (specified product list in Section 44_31_33). • Clean and perform minor repairs on the biofilter air‑distribution system (allowance up to $10,000) and adjust sprinkler systems if needed (allowance up to $5,000). • Conduct performance testing and blower re‑balancing, and deliver as‑built drawings and test reports. • Mandatory pre‑proposal site visit on 23 Mar 2026; bid submission deadline 1 Apr 2026, 11 AM PT; 5 % bid bond required; experience with three prior biofilter installations required.