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S E C 0 R <br /> • <br /> �a <br /> a <br /> Petroleum hydrocarbons and fuel oxygenates were not detected above laboratory reporting limits in <br /> groundwater samples from borings GP-4 through GP-7 ' <br /> Groundwater monitoring has been performed since August 1998 Fourth quarter 2002 groundwater <br /> monitoring reported high concentrations (>10,000 ppb) of TPHg in wells MW-1, MW-5, MW-7, and <br /> MW-9 The highest concentrations of benzene (720 ppb) and MtBE (240 ppb) were found in wells <br /> MW-2 and MW-5, respectively Groundwater flow was to the northeast with a gradient of <br /> approximately 0 001 to 0 002 ft/ft (Attachment 1) Depth to groundwater ranged from 13 82 (MW-9) <br /> to 15 84 (MW-3)feet bgs (Attachment 1) <br /> RECENT QUARTER ACTIVITIES (Fourth Quarter 2002) <br /> 1 Performed quarterly groundwater monitoring and sampling (GRI) <br /> 2 Prepared and submitted a quarterly summary report <br /> 3 Installed off-site wells on November 5 and 6, 2002 as part of Phase 3 of SECOR's Addendum #2 <br /> to Work Plan For Additional Off-Site Assessment, dated August 15, 2002 <br /> NEXT QUARTER ACTIVITIES (First Quarter 2003) <br /> 1 Prepare and submit a quarterly summary report <br /> 2 Perform quarterly groundwater monitoring and sampling (GRI) <br /> 3 Prepare and submit off-site subsurface assessment report <br /> CHARACTERIZATION/REMEDIAL STATUS <br /> y <br /> r< <br /> Soil contamination delineated? Yes <br /> Dissolved groundwater delineated? Yes, with Geoprobe investigation <br /> Free product delineated? N/A <br /> Soil remediation in progress? No <br /> Start? N/A - <br /> Anticipated completion date? N/A <br /> CONSULTANT- SECOR International Incorporated ; <br /> j <br /> YI <br /> rLI <br />