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A potentiometne contour map developed from the water level data is presented in Figure 3-1 As in previous <br /> sampling rounds,the water table is characterized by a northeast-southwest trending trough Groundwater <br /> flow is toward the center of the trough at a gradient of approximately 0 011 feet/foot <br /> 3.2 Analytical Results <br /> ' A summary of the analytical data for the June 29 and 30,2005 groundwater sampling event is presented in <br /> Table 3-2 Historical groundwater analytical results are presented in Appendix A,Table A-1 The analytical <br /> ' reports and chain of custody forms are presented in Appendix C <br /> Petroleum hydrocarbons were detected in samples collected from monitoring wells MW-2,MW-2A,MW-3A, <br /> ' and MW-6 BTEX compounds were detected in monitoring wells MW-2 and MW-2A,xylene was detected <br /> in monitoring well MW-3A <br /> ' TPH-g and BTEX compounds were not detected in the upgradient monitoring well MW-9, nor in the <br /> equipment blank water sample (EB-1) <br /> ' Table 3-2 <br /> Organic Analytical Results <br /> San Joaquin County Human Services Agency <br /> June 2005 <br /> Results presented in micrograms per liter (4g/L) <br /> Well Groundwater Benzene Toluene Ethylbenzene Xylene TPH-g <br /> Elevation (total) <br /> feet MSL <br /> MW-2 NM 6,900 23 350 120 12,000 <br /> MW-2A -1790 53 40 54 36 2,400 <br />' MW-3A -1801 ND(0 50) ND(0 50) ND(0 50) 13 180 <br /> MW-4 -1707 ND(0 50) ND(0 50) ND(0 50) ND(0 50) ND(50) <br />' MW-6 -1658 ND(0 50) ND(0 50) ND(0 50) ND(0 50) 56 <br /> MW-7 -1836 ND(0 50) ND(0 50) ND(0 50) ND(0 50) ND(50) <br />' MW-9 -1901 ND(0 50) ND(0 50) ND(0 50) ND(0 50) ND(50) <br /> E13-1 NA ND(0 50) ND(0 50) ND(0 50) ND(0 50) ND(50) <br /> NA=not applicable <br /> ND( analyte not detected,detection limit indicated in parentheses <br /> NM=not measured <br /> 4 <br />