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collected at a depth of 30 feet bsg or below (Tables 1 and 2) <br /> On 26 Octobei 2001,a total offour soil robe borings (P 12A/B and P 13A/B) were advanced <br />' p <br /> at the site south of the and near the farmer UST location Probe borings were advanced in the <br /> area of the former USTs to collected depth discrete water samples TPH-d was detected in <br />' all four of the grab ground water samples analyzed at concentrations from 130 micrograms <br /> per liter (pg/1) to 550 gg/1(Table 2) <br />' Between June 1996 and January 2002, 16 ground water monitoring and sampling events were <br /> performed at the site to monitor dissolved petroleum hydrocarbon concentrations in ground water <br /> and to char acterize gi ound water flow dii ection and gradient on the site (Table 3) <br />' '• During the most recent sampling event TPH-d was detected in ground water samples <br />' collected from each monitoring well(MW-I through MW-4)at concenti ations of 3,600 gg/l, <br /> 1,100 p.g/l, 430 µg/1, and 840,000 µg11, respectively TPH-g was detected in ground water <br /> sample MW-1 and MW-4 at concentrations of 120 gg/1 and 640 µg11, respectively <br />' Ethylbenzene and total xylenes were detected in the ground water sample fY om well MW-4 <br /> at concenti ations of 1 1µg11 and 0 83 gg/l, respectively (Tables 4 and 5) <br /> • Ground elevations have decreased approximately foul to five feet of the monitoring period, <br /> at some points increasing dissolved hydrocarbon concentrations near the ground water wells <br /> • The later al extent of the dissolved petroleum hydrocarbon plume is delineated by the current <br /> lie area bound by wells MW-1 through MW-4 and soil borings <br />' GROUND WATER DEPTH AND FLOW DIRECTION <br />' In January 2002, ground water depth was measured at approximately 19 feet below surface grade <br /> (bsg) Review of historical AGE depth to ground water measurements indicates that ground water <br /> depth near the site has fluctuated between approximately 15 and 20 feet bsg Ground watct flow <br />' direction at the site can vary seasonally However, the overall regional flow direction is southwest <br /> 1 <br /> s <br />