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GROUNDWATER ASSESSMENT REPORT <br /> Method 8260 Results of chemical analyses on soil and <br /> TBA,ethanol,and methanol by EPA M y <br /> growidwatei samples are summarized in Table 7 �- <br /> TABLE 6 , <br /> SUMMARY OF GROUNDWATER ELEVATIONS <br /> Groundwater <br /> Depth to Elevation <br /> Water (Feet below mean <br /> Well Identification Date (feet) sea level) ` <br /> MW=1 1104102 18 35 1185 <br /> 5/02/02 1786 1136 <br /> 8/21/02 1996 1346 <br /> 4111103 49.52 q , t 13.073 I ' -165 <br /> MW-2 1/04/02 -1-777 1180 1 <br /> 51021102 1730 1133 <br /> 8/21/02 1838 1241 <br /> 4/11/03 1853 1256 <br /> MW-3 1/04102 1787 1183 <br /> 5/02102 1737 1133 <br /> 8/21/02 1945 1341 <br /> 4/11103 1872 1268 <br /> MW-4 1/04/02 1800 1199 <br /> 5102/02 1752 1151 <br /> 8121/02 1864 1263 - <br /> 4/11/03 1874 1273 <br /> Notes Groundwater elevations recorded prior to purging <br /> Elevations are presented in feet below mean sea level <br /> SOURCE ESA,2002-2003 <br /> Laboratory analysts detected MTBE in monttorm welt MW-3 durmg 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 laborato-ry_detection limits for all <br /> analyzed constituents Groundwater elevations are summarized in Table 7 Figure 6 through <br /> - - <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 ESA 1200252 <br /> September 2003 <br />