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EXECUTIVE SUMMARY <br /> r <br /> Upgradient Environmental Consultants visited the Valley Motors dealership on March 28 to <br /> measure water depths and collect groundwater samples from the four on-site monitoring wells The <br /> depth to groundwater has risen approximately 1 foot since December, and the static water level is at <br /> an average depth of 30 5 feet below grade Depth measurements indicate that groundwater <br /> continues to flow to the east <br /> After the depth to groundwater was measured, the wells were sampled by lowering a disposable <br /> Teflon&bailer below the static water level 'The samples were poured into 40-m1 vials and <br /> preserved for laboratory analysis Four samples were collected and analyzed for TPH-gasoline, <br /> using EPA method 8015m and for BTEX using EPA method 8020 <br /> Hydrocarbon concentrations in one well (VM-2) showed sharp;declines from the previous quarter <br /> Concentrations remained at or below the detection limits in VM-3 and VM-4,but the TPH-g <br /> concentration in VM-1 rose from below the detection limit to 670 parts per billion Overall, <br /> however,there has been a substantial decrease in the concentration of all analytes in both VM-1 and <br /> VM-2 since monitoring began in 1996 - <br /> s <br /> 1 <br /> 1 <br />