Remediation of methylene chloride in soil and groundwater beneath a former manufacturing facility Northwest Atlanta, GA

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Courtesy of TRS Group, Inc.

TRS Group, Inc. (TRS), as a subcontractor to MACTEC, Inc. (MACTEC) provided a standard fixed price remediation of methylene chloride (MeCl) and trichloroethene (TCE) in soil and groundwater using Electrical Resistance Heating (ERH) for a confidential client in Northwest Atlanta, GA. Valuable location and large area motivated client to select ERH to provide a rapid and complete remediation for property resale. The project was conducted in three sequential phases, each installed after the previous stage was completed to prevent any vertical or horizontal migration of contamination during the system installation. The total treatment volume was approximately 18,000 cubic yards. The ERH system operated for 369 days in 3 separate stages to achieve the stringent remediation goals. Performance goals were set for both soil and groundwater as follows: Reduce MeCl concentrations at all confirmatory soil sampling points to less than 1 mg/kg, Reduce groundwater concentrations of MeCl to 120 μg/l, and Reduce dissolved phase TCE concentrations to 5 μg/l.

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