In Situ Bioaugmentation for the Remediation of TCE and TCA DNAPL at a Metal Finishing Operation
The primary manufacturing processes at Crown Risdon's 11.5-acre former Cosmetic Container Division Facility involved metal finishing operations. This resulted in the groundwater becoming contaminated primarily with chlorinated solvents, specifically chlorinated ethenes and ethanes such as 1,1,1-trichloroethane (TCA); trichloroethene (TCE); tetrachloroethene (PCE); cis-1,2-dichloroethene (cis-DCE), 1,1-DCE; and 1,1-dichloroethane (DCA). The two areas of concern are a former lagoon area and the former metal finishing area, each of which has high levels of chlorinated ethenes and ethanes at concentrations in groundwater that suggest the presence of dense non-aqueous phase liquid (DNAPL). Concentrations as high as 65 ppm TCA and 26 ppm TCE have been measured in the groundwater at this facility.
