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CIVIL & ENVIRONMENTAL

Department of Toxic Substances Control (DTSC)
Singer Friden Treatment System Operation, Maintenance & Monitoring

Project Background
In July 2001, Engineering/Remediation Resources Group, Inc. (ERRG) was awarded a three-year master service agreement (MSA) contract by the California Department of Toxic Substances Control (DTSC). ERRG has conducted work on 17 task orders totaling $14.6M over the past three and a half years. As the direct prime contractor to DTSC, ERRG worked closely with DTSC personnel to select appropriate remedies and provide final documentation for site closure.

The Singer-Friden Groundwater Remediation System is located in a residential and light commercial area of San Leandro, California. The groundwater contains elevated levels of volatile organic compounds (VOCs), primarily trichloroethene (TCE) and tetrachloroethene (PCE), as a result of operations at a former industrial manufacturing facility. The extraction system is composed of nine extraction wells, nine monitoring wells, and seven piezometers located throughout a residential neighborhood. The treatment system is composed of two vessels, each containing 6,000 lbs of liquid-phase granular activated carbon, and ancillary appurtenances.

ERRG provides operation and maintenance (O&M) services and compliance monitoring for the system. Treatment system O&M includes groundwater and system sample collection on a monthly basis for monitoring system performance, and on a quarterly basis per National Pollutant Discharge Elimination System (NPDES) permit requirements for the Regional Water Quality Control Board (RWQCB).