City of Santa Rosa PlanetBids #226-017

Decommissioning and Liner Installation at Laguna County Sanitation District WWTP

Santa Barbara County Public Works is seeking contractors for the decommissioning of legacy facilities at the Laguna County Sanitation District wastewater treatment plant in Santa Maria, California. - Government Buyer: - Santa Barbara County Public Works, Laguna County Sanitation District - Project Scope: - Decommission and abandon legacy wastewater treatment plant facilities, including the trickling filter, headworks, grit chamber, and ancillary structures - Site clearing, grubbing, and demolition of existing structures - Subgrade stabilization using geogrid, crushed rock, and filter fabric per Caltrans standards - Installation of new reinforced shotcrete or cast-in-place concrete liners for Pond A (1.4 acres) and the Storage Basin (2.2 acres) - Installation of pressure relief valves embedded in gravel to mitigate uplift pressures beneath pond liners - Compliance with detailed geotechnical recommendations for liner design, subgrade preparation, dewatering, and compaction - Products/Materials Requested: - Reinforced shotcrete or cast-in-place concrete liners (per District plans) - Subgrade stabilization materials: crushed rock, dry sandy fill, geogrid, filter fabric - Pressure relief valves (manufacturer-recommended) - Unique/Notable Requirements: - Strict adherence to geotechnical and construction specifications - Dewatering and uplift pressure mitigation due to perched groundwater - Compliance with Caltrans standards for subgrade materials - No specific OEMs or vendors are named in the solicitation documents - Opportunity is open to all qualified contractors; bids must be submitted in paper format

Description

This solicitation is for the decommissioning of legacy facilities including the abandonment of the trickling filter, headworks, grit chamber, and other ancillary facilities at the Laguna County Sanitation District wastewater treatment plant. The project involves site clearing, demolition, subgrade stabilization, and installation of concrete liners for ponds. Bids must be submitted in paper format by July 23, 2026. The project is located at 620 West Foster Road, Santa Maria, California, and is managed by Santa Barbara County Public Works.

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