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. MW-9 1 25 13 7 60 2 457 12 26 1 28 10 -15 84 + <br />' Note NM=Not Measured <br />' A potentiometric contour map developed from the water level data is presented on Figure 3-1 As in previous <br /> sampling rounds groundwater flow is generally toward the north-northeast within a trough The horizontal <br />' groundwater gradient down the center of the trough was 0 00024 ftIft <br /> 32 ANALYTICAL RESULTS <br /> 1 <br /> A summary of the analytical data for the February 2002 groundwater sampling is presented in Table 3-2 <br />' Historical groundwater analytical results are presented in Table A-1 in Appendix A The analytical reports <br /> and Chain of Custody forms are presented in Appendix C <br />' Petroleum hydrocarbons,benzene,ethylbenzene,were detected in samples collected from MW-2 and MW- <br /> 2A Toluene was not detected in any of the wells sampled this quarter Xylenes were only detected in MW-2 <br /> Benzene and Etylbenzne were detected to MW-2, MW-2A, and MW-6 Benzene was detected in MW-6 <br /> Petroleum hydrocarbons were found in MW-2, MW-2A, MW-3A, MW-5, and MW-6 No petroleum <br /> hydrocarbons or BTEX compounds were detected in sample collection at MW-4,MW-9,nor the equipment <br /> blank <br /> Table 3-2 <br /> Organic Analytical Results <br /> San Joaquin County Human Services Agency <br /> February 2002 <br /> Well Groundwater Benzene TolueneEtylbenzne Total Xylene TPH-G <br /> EIevation (µg/L) (ug/L) (uglL) (ug/L) (ug/L) <br /> (feet) <br /> MW-2 NM 12,000 ND (250) 770 940 28,000 <br /> MW-2A -16 19 25 ND (5 0) 20 ND (5 0) 1200 <br /> MW-2A (dup) -1619 28 ND (5 0) 23 ND(5 0) 1100 <br /> MW-3A -1637 ND(0 5) ND (0 5) ND (0 5) ND (0 5) 120 <br /> MW-4 -1564 ND(0 5) ND (0 5) ND(0 5) ND(0 5) ND (50) <br /> MW-5 -1416 ND(0 5) ND (0 5) ND (0 5) ND (0 5) 61 <br /> • MW-6 -1482 2 4 ND (0 5) 054 ND(0 5) 60 <br /> IMW-7 -1666 2 S 1 ND (0 5) ND (0 5) ND (0 5) ND (50) <br /> UPR0J6CTSISAN70QIHSAl1QU1RPT WPD 4 <br />