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. Table 3-1 <br />' Groundwater Parameter,Depth, and Elevation Data <br /> San Joaquin Human Services Agency <br /> December 2002 <br /> t <br /> Top of Depth <br />' Casing to December 10,2002 <br /> Temp Conductivity Elevation(ft Water Water Elevation (ft <br /> Well (°C) pH I (µMHOS) I MSL} I (ft) MSL) <br /> MW-2 2242 607 1 780 NM 3038 NM <br /> MW-2A 2186 608 1 398 1191 3049 -1858 <br /> MW-3A 1996 625 1 849 1123 2985 -1862 <br /> tMW-4 2074 672 1 151 1346 31 36 -1790 <br /> MW-5 2115 648 820 1283 2928 -1645 <br />' MW-6 21 17 667 1 446 1317 3043 -1726 <br /> MW-7 2063 659 1 514 1314 32 15 -1901 <br /> MW8 NM NM NM 1376 3260 -1884 <br /> UZ-9 2090 681 2 338 1226 3087 -1861 <br /> Note NM=Not Measured <br /> A tentiometric contour ma developed from the water level data is resented on Figure 3-1 As m previous <br /> Po P Pe P Sm' <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 is 00012 ft/ft <br />' 3.2 ANALYTICAL RESULTS <br />' A summary of the analytical data for the December 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 (COC) forms are presented in Appendix C <br /> 1 <br /> Petroleum hydrocarbons were detected in samples collected from MW-2,MW-2A,MW-3A,and MW-6 <br />' Low Levels of benzene and ethylbenzene were detected in MW-2, and MW-2A A slight detection of <br /> benzene was also found in MW-6 Petroleum hydrocarbons,benzene,toluene,total xylene, and ethylbenzene <br /> • <br />' L\PROJECTSISANJOQ1HSA%2QO4RPT WPD 4 <br />