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Manufacturing Plant Remediation Contract Awarded To Stratus

Stratus secured a contract for ongoing assessment and remediation at a former PVC manufacturing facility in southern California. This work surrounds environmental and engineering support for ongoing remedial efforts and is directed by the Department of Toxic Substances Control (DTSC). Prior to Stratus involvement, multiple remedial investigations were conducted at the Site. Soil vapor, soil, and groundwater sampling and laboratory analyses indicated that the primary chemical constituents of concern are volatile organic compounds, specifically 1,2-dichloroethane (1,2-DCA), cis-1,2-dichloroethylene (cis-1,2-DCE), tetrachloroethylene (PCE), toluene, TCE, and vinyl chloride.

The preferred remedial action alternative for the Site is SVE for treatment of vadose or unsaturated soils, and enhanced in-situ bioremediation (EISB) for treatment of dissolved-phase VOCs in groundwater. This conceptual design assumes emulsified vegetable oil (EVO) would be used as a carbon substrate source for EISB. Short- and long-term SVE pilot tests have been performed at the Site to facilitate full-scale remedial design. Stratus is currently finalizing the long-term SVE pilot test results and will subsequently develop a full-scale SVE system design for implementation. The SVE system will be gradually expanded in stages over several years. During this time, pilot testing and design of EISB will be completed. Full-scale implementation of EISB is tentatively scheduled to begin approximately two years after the start of SVE operations. The duration of EISB to address VOC-impacted groundwater is expected to be approximately five years. The facility operated between 1958 and 2003.

Project under Manufacturing