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1 <br /> Table 3-1 <br /> Groundwater Parameter, Depth, and Elevation Data <br /> Top of <br /> Conduc- Casing Depth to 15 May 2001 <br /> Temp tivlty Elevation (ft Water Water Elevation (ft <br /> Well (°C) pH ( MHOS) MSL) (ft) MSL) <br /> MW-2 248 745 2097 NM 2674 NM <br /> ' MW-2A 2301 696 1,519 11 91 2685 -1494 <br /> MW-3A 2277. 736 2,211 1123 2625 -1502 <br /> ' MW-4 2558 751 1,522 1346 2786 -1440 <br /> MW-5 NM NM NM 1283 2571 -1288 <br /> ' MW-6 2765 6 8 1 58 13 17 2657 -1340 <br /> MW-7 2254 749 1 57 13 14 2838 -1524 <br /> MW-8 NM NM NM 13 76 2875 -1499 <br /> MW-9 232 670 2,941 1226 2725 -14 99 <br /> Note NM = Not Measured <br /> A potentiometric contour map developed from the water level data is presented on Figure 3-1 <br /> As in previous sampling rounds groundwater flow is generally toward the north-northeast within <br /> a trough The horizontal groundwater gradient down the center of the trough was 0 0018 ft/ft <br />' 3.2 ANALYTICAL RESULTS <br /> A summary of the analytical data for the May 2001 groundwater sampling is presented in Table <br /> 3-2 Historical groundwater analytical results are presented in Table A-1 in Appendix A The <br /> analytical reports and Chain of Custody forms are presented in Appendix C <br />' <br /> Petroleum hydrocarbons, benzene, toluene, ethylbenzene, and total xylenes were detected in <br /> samples collected from MW-2 and MW-2A Petroleum hydrocarbons, and benzene were found <br /> in MW-3A, and MW-6 Total xylenes were also detected in MW3A, and toluene was also found <br /> in MW-6 Benzene was the only contaminant of concern detected in MW-6 No petroleum <br /> hydrocarbons or BTEX compounds were detected in sample collection at MW-9 MTBE was not <br /> detected in any of the samples collected <br /> UPRO]ECTSISANJOQ%HSAUQOIRn WPD 4 <br />