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Di salvo Truckmg-work Plan Novembc 13.1995 PW.2. xylene were detected at or above the reported laboratory detection limits. Copies of the laboratory report sheets and chain-of-custody are attached. To remove the detected diesel contamination to non-detectable concentrations, Di Salvo Trucking proposes to perform on-site treatment of the water using activated carbon. Following treatment of the stored water to concentrations below laboratory detection limits for diesel, Di Salvo Trucking proposes to discharge the water on site. BACKGROUND In June, 1995, Condor installed one (1)groundwater monitor well, MW1, at the Di Salvo Lathrop site. MWl was installed to assess the potential impact to groundwater from hydrocarbon contamination detected beneath an underground storage tank formerly located at the site. On August 14, 1995, Condor installed a groundwater pumping system designed for short-tem-4 continuous operation in MW1. The system was installed to evaluate the lateral extent of groundwater contamination detected in the initial groundwater sample collected from MW 1.. On August 22, the system was turned off following removal of approximately 15,700-gallons of groundwater from MW . The groundwater was pumped to a 21,000-gallon storage vessel located on site. WORK SCOPE Di Salvo Trucking proposes to perform on-site treatment and discharge of the approximately 15,700-gallons of petroleum contaminated water stored on-site. Liquid phase activated carbon will be utilized to treat the contaminated water. The activated carb n will be in a 55-gallon steel drum. Initially, the stored water will be gravity fed to the activated carbon and then pumped from the carbon canister back into the storage vessel. The water will be cycled back into the storage vessel until sufficient time has elapsed to completely saturate the carbon with water, approximately 30 to 45 minutes. Following complete saturation of the activated carbon, one (1)water sample will be collected from the effluent of the carbon canister. The water sample will be collected in a 1-liter glass bottle. The sample container will be labeled, placed in a cooler chilled with ice and delive ed under chain-of-custody procedures to a 4%� CONDOR s