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Two plumes of CVOCs have been delineated within the Site; the primary contaminant in each plume is PCE. During performance monitoring (post-injection), a mass balance on the chlorinated hydrocarbons indicated that the mass of PCE destroyed significantly exceeded the baseline mass in groundwater in the treatment area, which supports that additional PCE mass was being desorbed off the bedrock/soil and into the groundwater in the source area, as expected.
