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Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station No 6020 <br /> 1711 E Yosemite Avenue, Manteca, CA <br /> TOC Depth to Water Level Ethyl- Total <br /> Well Date P/ Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO <br /> Number Sampled NP (feet msl) (feet bgs) (feet msi) (pg1L) (ugll-) (jig/L) (pg/L) (pg1L) (jrg1L) (pg1L) (mg/L) Comments <br /> MW-6 08/05/2004 P 4365 2481 1884 <50 - <0 50 <0 50 <0 50 <0 50 32* 1 70 <br /> 11/1212004 P 4365 2335 2030 <50 -- <0 50 <0 50 <0 50 <0 50 6 4*J 370 <br /> 02/11/2005 P 4365 2250 21 15 <50 - <0 50 <0 50 <0 50 <0 50 9 9* 310 <br /> 105/3112005 P 4365 2204 2161 <)0 -- <0 50 <0 50 <0 50 <0 50 3 7*J 360 <br /> —r108118/20051 P 4365 2260 2105 <50 -- <0 50 <0 50 <0 50 <0 50 1 7* 410 <br /> MW-7 2/95/2001 -- 4306 2025 2281 <50 — <0 5 <05 <0 5 <0 5 <25 -- <br /> 6/1/2001 -- 4306 2060 2246 <50 - <05 <05 <0 5 <0 5 <25 -- <br /> 9/11/2001 -- 4306 2186 2120 <50 - <05 <05 <0 5 <0 5 <2 5 19 <br /> 12/20/2001 -- 4306 -- -- — - — -- — -- — -- Well Inaccessible <br /> 3/2012002 -- 4306 2040 2266 <50 — <05 1 <0 5 <0 5 <0 5 <2 51<0 5* 18 <br /> 6/20/2002 P 4306 2134 2172 <50 — <05 <05 <0 5 <05 <0 5* 28 <br /> 9/24/2002 P 4306 2194 21 12 <50 -- <0 5 <0 5 <0 5 <05 <0 5* NA <br /> 11/27/2002 P 4306 2131 2175 <50 -- 78 45 1 8 0 55* 32 <br /> 02/17/2003 NP 4306 2143 2163 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 260 <br /> 04/28/2003 P 4306 2161 2145 <50 <0 50 <0 50 <0 50 <0 50 <0 50* 330 <br /> 07128/2003 P 4306 2251 2055 <50 -- <0 50 <0 50 <050 <0 50 <0 50* 370 <br /> 11/26/2003 P 4306 2260 2046 <50 - <0 50 <0 50 <050 <0 50 <0 50* 220 <br /> 02/16/2004 P 4306 2295 2011 <50 - <0 50 <0 50 <050 <0 50 <0 50* 270 <br /> 05/26/2004 P 4306 2298 2008 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 240 <br /> 08/05/2004 P 4306 2415 1891 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 310 <br /> 11/12/2004 P 4306 2266 2040 <50 — <0 50 <0 50 <0 50 <0 50 <0 50* 209 <br /> 02/11/2005 P 4306 2185 2121 <50 — <0 50 <0 50 <0 50 <0 50 <0 50* 410 <br /> 05/31/2005 P 4306 2138 2168 <50 — <0 50 <0 50 <0 50 <0 50 <0 50* 320 <br /> 08118/2005 P 4306 21 97 21 09 <50 -- <0 50 <0 50 <0 50 1 <0 50 1 <0 50* 340 <br /> MW-8 2/15/2001 -- 4341 2042 2299 <50 — <0 5 <0 5 <0 5 <0 5 <2 5 — <br /> 6/1/2001 -- 4341 2076 2265 <50 -- <05 <0 5 <05 <0 5 <2 5 -- <br /> 9/11/2001 - 4341 2195 21 46 <60 -- <05 <0 5 <0 5 <0 5 <2 5 1 9 <br /> 12/20/2001 -- 4341 2183 21 58 <50 — <05 <05 <0 5 <0 5 <2 512 6* 19 <br /> 3/20/2002 4341 2059 2282 <50 -- <05 <05 <0 5 <0 5 <2 51<0 5* 19 <br /> 6/20/2002 P 4341 2157 21 84 <50 <05 <0 5 <0 5 <0 5 <0 5* 2 8 <br /> <50 -- <0 5 <0 5 <0 5 <0 5 <0 50* <br /> 9124!2002 P 43 41 2218 21 23 — <br /> 11/27/2002 P 4341 21 56 2185 <50 -- <05 <05 <0 5 <0 5 <0 5* 36 <br /> Report Date October 26, 2005 Page 2 of 6 <br />