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GROUNDWATER ASSESSMENT REPORT <br /> TABLE 6 <br /> SUMMARY OF GROUNDWA'T'ER ELEVATIONS <br /> Groundwater <br /> Depth to Elevation <br /> Water (Feet below mean <br /> Well Identification Date (feet) sea level) <br /> MW-1 1104102 1835 1185 <br /> 5/02102 1786 1136 <br /> 8121102 1996 1346 <br /> 4/11/03 i9 SM9 15 4-3 021265 <br /> k MW-2 t/04/02 4718 35 118 .1238 <br /> 5102102 1730 1133 <br /> 8121102 1838 1241 <br /> 4111/03 1853 1256 <br /> MW-3 1104102 1787 1193 <br /> 5102102 17 37 1133 <br /> 8121/02 1945 1341 <br /> 4111103 18 72 1268 <br /> MW-4 1104102 1800 1199 <br /> 5102/02 1752 1151 <br /> 8121102 1864 1263 <br /> 4111/03 1874 t2 73 <br /> . Notes Groundwater elevations recorded prior to purging <br /> Elevations are presented in feet below mean sea level <br /> SOURCE ESA 2002-2003 <br /> Groundwater samples were analyzed by the laboratory for the presence of TPH as gasoline and <br /> BTEX by EPA Methods 8015 and 8020,and MTBE,DIPE,TAME,ETBE, EDB, 1-2 DCA, <br /> TBA,ethanol,and methanol by EPA Method 8260 Results of chemical analyses on soil and <br /> groundwater samples are summarized to Table 7 <br /> Laboratory analysts detected MTBE in monitonng well MW-3 during the first monitoring and <br /> sampling event All other groundwater samples collected in January 2001, as well as those <br /> collected during the three subsequent events,were below laboratory detection limits for all <br /> analyzed constituents Groundwater elevations are summarized in Table 7 Figure 6 through <br /> Figure 9 depict the groundwater flow direction in January 2002, May 2002,August 2002,and <br /> April 2003 respectively Groundwater flow direction appears to change from east to south <br /> depending on month and the groundwater gradient ranges from 0 002 to 0 02 feet per foot <br /> -- _ --Groundwater Assessment Report_ - _—_ _— __--15 -__-_ -- -_- --_ — -=ESAi200252= --- _- - - --- - - _ - - <br /> September 2003 <br />