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V <br /> MW-6 NM NM NM 13 17 2803 -1486 <br />' MW-7 NM NM NM 1314 2974 -1660 <br /> MW-8 NM NM NM 1376 30 18 -164 <br />' L MW-9 2103 675 J 3,981 12 26 2859 -1633 <br />' Note NM=Not Measured <br />' A potentiometric contour map developed from the water level data is presented on Figure 3-1 As m 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 ft/ft <br />' 32 ANALYTICAL RESULTS <br /> A summary of the analytical data for the April 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,and total xylene were detected in samples collected from <br /> MW-2 and MW-2A Toluene was not detected in any of the wells sampled this quarter No petroleum <br /> hydrocarbons or BTEX compounds were detected in sample collection at MW-9,nor the equipment blank <br /> Table 3-2 <br /> Organic Analytical Results <br /> San Joaquin County Human Services Agency <br />' May 2002 <br /> Well Groundwater Benzene Toluene Ethylbenzen Total Xylene TPH-G <br /> Elevation (µg/L) (µg/L) e (,ug/L) (/-4.9/L) <br /> (feet) (µg/L) <br /> MW-2 NM 10,000 ND (100) 810 1,000 25,000 <br /> IMW-2A -1624 310 ND (5 0) 56 16 1,100 <br /> MW-3A -1637 NS NS NS NS NS <br /> IMW-4 -1556 NS NS NS NS NS <br /> • MW-5 1 -1508 NS NS NS NS NS <br /> L\PR01EC1'S15AN10Q1HSA\IQ0IRPT WPD 4 <br />