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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 /> TO 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 msl) (pg1L) (ug1L) (ugIL) (pg1L) (pg/L) (pg1L) (ug1L) (mg/L) Comments <br /> MW-8 02/17/2003 NP 4341 2164 2177 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 240 <br /> 04/28/2003 P 4341 2181 21 60 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 250 <br /> 07/28/2003 P 4341 2271 2070 <50 — <0 50 <0 50 <0 50 <0 50 <0 50* 210 <br /> 11/2612003 P 4341 2282 1 2059 <50 — <0 50 <0 50 <0 50 <0 50 <0 50* 230 <br /> 02/16/2004 P 4341 2314 2027 <50 — <0 50 <0 50 <0 50 <0 50 <0 50* 460 <br /> 05/26/2004 P 4341 2324 2017 <50 — <0 50 <0 50 <0 50 <0 50 <0 50* 210 <br /> 08/05/2004 P 4341 2440 19 01 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 260 <br /> 1 111 2120 04 P 4341 2301 2040 <50 — <0 50 <0 50 <0 50 <0 50 <0 50* 302 <br /> 02/11/2005 P 4341 2210 2131 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 350 <br /> 05/31/2005 P 4341 2157 2184 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 30 <br /> 08/18/2005 P 434 22 18 21 23 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 250 <br /> MW-9 2/15/2001 — 4369 2080 2289 <50 — <05 <0 5 <05 <0 5 <2 5 -- <br /> 6/1/2001 -- 4369 21 18 22 51 <50 — <0 5 <0 5 <05 <0 5 <25 -- <br /> 9/11/2001 -- 4369 2241 2128 <50 - <05 <0 5 <05 <0 5 <2 5 14 <br /> 12120/2001 — 4369 2223 2146 <50 — <0 5 <0 5 <0 5 <0 5 <2 51<2 0* 21 <br /> 3/20/2002 -- 4369 2098 2271 <50 — <05 <0 5 <0 5 <0 5 <2 51<0 5* 21 <br /> 6/20/2002 P 4369 21 9221 77 <50 — <0 5 <0 5 <0 5 <0 5 <0 50* 1 8 <br /> j 9/24/2002 P 4369 2252 2117 <50 -- <05 <0 5 <0 5 <0 5 <0 5* NA <br /> 11 12 712 0 02 P 4369 21 90 21 79 <50 -- <05 <05 <0 5 <05 <0 5* 35 <br /> 02!1712003 NP 4369 2204 2165 <50 — <0 50 <0 50 <0 50 <0 50 <0 50* 310 <br /> 04/28/2003 P 4369 2219 21 50 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 370 <br /> 07/28/2003 P 4369 2312 2057 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 360 <br /> 11/26/2003 P 1 4369 2316 2053 <50 — <0 50 <0 50 <0 50 <0 50 <0 50* 30 <br /> 02/16/2004 P 1 4369 2353 2016 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 250 <br /> 03/1112004 P 4369 2300 2069 -- -- -- -- -- -- -- — <br /> 05/26/2004 P 4369 2361 2008 <50 — <0 50 <050 <0 50 <0 50 <0 50* 290 <br /> 08/05/2004 P 4369 2473 1896 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 280 <br /> 11/12/2004 P 4369 2335 2034 <50 <0 50 <0 50 <0 50 <0 50 <0 50* 304 <br /> 02111/2005 P 4369 2244 2125 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 380 <br /> 05/31/2005 P 4369 2197 2172 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 340 <br /> 08/18/2005 P 4369 2250 2119 <50 <0 50 <0 50 <0 50 <0 50 <0 50* 420 <br /> MW-10 2/15/2001 — 4209 1902 2307 <50 -- <05 <0 5 <0 5 <0 5 -25 — <br /> Report Date October 26,2005 Page 3 of 6 <br />