072026-1051-project_manual.pdf

This is a Project Manual for the Arkema Interim Action-Phase 1 remediation project solicited by Pierce County and the City of Tacoma, Washington. The project encompasses three primary work components: construction of a continuous containment wall using self-hardening slurry (composed of ground granulated blast furnace slag, select clay, and water) keyed into the second site aquitard via vibrating beam methods to create a low-permeability groundwater barrier; site preparation and wall-area capping including excavation, fill, grading, demolition, surcharge, temporary work, and installation of an impervious cap consisting of imported soil, geotextile, and PVC liner to reduce stormwater infiltration; and stormwater conveyance improvements consisting of one new 30-inch outfall construction and modification of one existing 36-inch outfall, with associated piping, vaults, headwalls, steel piling, check valves, and cofferdams to connect the wall-cap area to the outfall system. Proposals are due September 10, 2026.

The Project Manual provides detailed technical specifications and requirements for contractors bidding on this contamination containment and site remediation project. The document does not identify the contract value, contract term, incumbent contractor, set-aside or preference programs, evaluation criteria, timeline for questions, pre-bid meeting dates, or site visit schedules in the summary information available. Contractors should reference the complete Project Manual for comprehensive scope details, technical requirements, and submission instructions.