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4 <br /> � a <br /> Date April 30, 2004 <br /> JOE'S TRUCK PLAZA QUARTERLY GROUNDWATER MONITORING REPORT <br /> Facility Address 15600 South Harlan Road, Lathrop, California _ <br /> Project Supervisor _Kashman Singh 1 Dalwinder Dhoot <br /> Consulting Co/Contact Person Stratus Environmental, Inc /Stephen J Carter, R G <br /> Consultant Project No 2033-15600-01 <br /> Primary Agency/Regulatory ID No Margaret Lagono 1 San Joaquin County Environmental Management <br /> Department <br /> WORK PERFORMED THIS QUARTER (First 2004) <br /> 1 Stratus measured groundwater elevations and collected groundwater samples from wells MWA <br /> through MW-6, MWO-1 through MWO-3, and MWOAX on March 4, 2004 <br /> 2 Stratus compiled and evaluated groundwater monitoring data <br /> WORK PROPOSED FOR NEXT QUARTER(Second 2004) <br /> 1 The next sampling event is tentatively scheduled for June 2004 Groundwater samples will be <br /> collected for laboratory analysis from wells MW-1 through MW-6, MWO-1 through MWO-3, and <br /> MWO-1X <br /> 2 Groundwater samples will be analyzed at a state-certified analytical laboratory for total petroleum <br /> hydrocarbons as diesel (TPHD) and as gasoline (TPHG) by EPA Method SW8015BIDHS LUFT <br /> Manual, and for benzene, toluene, ethylbenzene, total xylenes (BTEX), methyl tert-butyl ether <br /> (MTBE), tertiary amyl methyl ether (TAME), ethyl tertiary butyl ether (ETBE), di-isopropyl ether <br /> (DIPE), tertiary butyl alcohol (TBA), 1,2-dichloroethane (1,2-DCA), 1,2-dibromoethane (1,2-DBA), <br /> ethanol, and methanol by EPA Method SW8260B <br /> 3 Stratus will conduct the proposed CPT study and install the proposed extraciton well May 10 — 14, <br /> 2004 <br /> 4 Upon installation and development of the extraction wells, Stratus will conduct a 48-hour DPE test in <br /> the last week of May <br /> Current Phase of Project Assessment <br /> Frequency of Groundwater Sampling All Wells= Quarterly <br /> Frequency of Groundwater Monitoring Quarterly <br /> Groundwater Sampling Date March 4, 2004 <br /> Is Free Product(FP) Present on Site No <br /> FP Recovered This Quarter No <br /> Cumulative FP Recovered to Date NA <br /> Approximate Depth to Groundwater 8 08 to 9 58 feet below top of well casing <br /> Groundwater Flow Direction North (on-site), east-southeast(off-site) <br /> Groundwater Gradient 0 0008 and 0 0009 ftfft <br /> P\Joe's Truck Plaza\Quarterly12004Voe's Truck Plan—IQ04 DOC 51KAI U5 <br />