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r t, <br /> 1 <br /> S E C 0 R <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 First quarter 2003 groundwater <br /> monitoring reported high concentrations (>10,000 ppb) of TPHg in wells, MW-1, MW-5, MW-7, and <br /> MW-8 The highest concentrations of benzene (220 ppb) and MtBE (1,400 ppb) were found in wells <br /> MW-5 and MW-12, respectively Groundwater flow was to the north-northwest with a gradient of <br /> approximately 0 0008 to 0 001 ft/ft (Attachment 1) Depth to groundwater ranged from 10 75 (MW-5) <br /> to 14 47 (MW-3)feet bgs (Attachment 1) <br /> RECENT QUARTER ACTIVITIES (Second Quarter 2003) <br /> 1 Performed quarterly groundwater monitoring and sampling (GRI) <br /> 2 Prepared and submitted a quarterly summary report ' <br /> 3 Prepared and submitted Work Plan for Off-Site Assessment dated April 7, 2003 r <br /> NEXT QUARTER ACTIVITIES (Third Quarter 2003) <br /> 1 Prepare and submit a quarterly summary report <br /> 2 Perform quarterly groundwater monitoring and sampling (GRI) <br /> 3 Perform off-site assessment pending issuance of well permits <br /> 4 Sample irrigation well pending access <br /> 5 Perform influence study pending access <br /> CHARACTERIZATION/REMEDIAL STATUS <br /> Sod contamination delineated? Yes <br /> Dissolved groundwater delineated? In all direction except Northeast of well <br /> MW-12 <br /> Free product delineated? NIA <br /> Sod remediation in progress? No <br /> Start? NIA <br /> Anticipated completion date? NIA <br /> RECOMMENDATIONS <br /> Based on the historical data and the current groundwater monitoring, SECOR recommends that <br /> groundwater monitoring and sampling continue and an off-site assessment be performed northeast <br /> of well MW-12 <br /> CONSULTANT. SECOR International Incorporated <br />