Teresa Thurston Replacement OSS

The Contractor shall install: 4-inch solid sewer pipe; one underground two-way cleanout; a 1,100-gallon concrete settling tank equipped with an effluent filter, traffic-rated risers, and gas-tight lids; a 1,250-gallon concrete pump tank equipped with traffic-rated risers and gas-tight lids and an effluent pump (Liberty FL70 Series or approved equal) complete with all required controls; 2-inch effluent transport line and manifold; and a gravel trench drainfield with 1.5-inch lateral piping. A gravel-less chamber system may be installed in lieu of the gravel trench drainfield. The Contractor is responsible for all permits, including the Department of Ecology Notice of Intent. The work also includes excavation, trenching, backfilling, compaction, surface restoration, and all appurtenances for a complete and operational system.