PRP Identification and Investigation of Perchlorate and TCE in Groundwater Basin

PRP Identification and Investigation of Perchlorate and TCE in Groundwater Basin

Project Highlights:
  • Historical research and analysis and PRP identification
  • Evaluation of fate and transport of volatile organic compound (VOCs) and perchlorate in soil and groundwater
  • Database management and preparation of GIS project
  • Prepared a preliminary assessment and site inspection report
  • Installed deep multi-port groundwater monitoring wells
  • Conducted community meetings and prepared a public participation plan

EEC Environmental (EEC) was retained to provide litigation support involving perchlorate and trichloroethene (TCE) contamination of a drinking water aquifer and municipal supply wells in California. The work was performed on behalf of a City in relation to a Superfund Site. The Site involved a 160-acre area used by defense contractors; fireworks manufacturers; research, development, testing, and production of solid-fuel rocket propellant; flare and pyrotechnics manufacturing; and other businesses that used perchlorate salts and/or solvents in their operations or products.

A technical review and analysis of potentially responsible parties (PRPs) and an analysis of the fate and transport of perchlorate and TCE in soil and groundwater was conducted to determine source and liability. In an effort to define the lateral and vertical extent of perchlorate and TCE in soil and groundwater and to evaluate remedial alternatives, a groundwater investigation was conducted.

The investigation included the installation of two deep multi-port groundwater monitoring wells approximately six miles downgradient of the 160-acre area, to a depth of approximately 800 feet below ground surface, and the collection of soil and groundwater samples. Based on the investigation activities, a public participation plan was prepared and a community meeting was held in order to inform interested parties and community members of the activities. All investigation and public participation activities were conducted to be consistent with the National Contingency Plan (NCP) pursuant to CERCLA.

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