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3.0 MONITORING RESULTS SUMMARY <br /> 3.1 GROUNDWATER PHYSICAL CHARACTERISTICS AND POTENTI METRIC <br /> SURFACE ELEVATIONS <br /> Table 3-1 presents a summary of groundwater parameters, depths and elevations. Since 18 June <br /> 1998 (the last available groundwater elevation data) groundwater elevations have increased by <br /> a maximum of 0 71 feet in MW-2A and declined by 0.52 feet in MW-9 The groundwater <br /> elevation changes this quarter result in a flattening of the trough in the groundwater surface <br /> Table 3-1 <br /> Groundwater Parameter, Depth, and Elevation Data <br /> Top of 17 March <br /> Conduc- Casing Depth to 1998 Water <br /> Temp tivity EIevation (ft Water Elevation (ft <br /> Well (°F) pH (MHOS) MSL) (ft) MSL) <br /> MW-2 NM NM NM NM 2815 NM <br /> MW-2A 740 69 1,460 1191 28 30 -16 39 <br /> MW-3A NM NM NM 1123 2781 -1658 <br /> MW4 NM NM NM 1346 29 17 -1571 <br /> MW-5 NM NM NM 1283 2720 -14,37 <br /> MW-6 NM NM NM 1317 28 28 -15 11 <br /> MW-7 NM NM NM 1314 3002 -16 88 <br />' MW-8 NM NM NM 13 76 3044 -1668 <br /> MW-9 71 0 7 1 1,730 1226 2874 -1648 <br />' T— <br /> Note NM = Not Measured <br />' A potentiometnc 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 average horizontal groundwater gradient down the center of the trough was <br /> 0 0007 ft/ft <br /> 1 <br /> L TR0JEC-MSAN10QWA\H5A_98 oCr 5 October 19% <br />