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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 msl) (pglL) (lrglL) (pglL) (pglL) (pg/L) (l g/L) WIL) (mglL) Comments <br /> MW-10 9/24/2002 P 4209 2081 2128 <50 -- <0 5 <0 5 <05 <0 5 <0 5* NA <br /> 11127/2002 P 4209 2024 2185 <50 -- 074 <05 <05 <0 5 <0 5* 47 <br /> 02/17/2003 NP 4209 2023 2186 <50 — <0 50 <0 50 <0 50 <0 50 <0 50* 320 <br /> 04/28/2003 NP 4209 2040 2169 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 4 70 <br /> 07/28/2003 P 4209 21 30 2079 <50 — <050 <0 50 <0 50 <0 50 <0 50* 360 <br /> 11/26/2003 P 4209 2148 2061 <50 -- <050 <0 50 <0 50 <050 <0 50* 320 <br /> 02/16/2004 P 4209 2111 2098 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 420 <br /> 03/11/2004 P 4209 2122 2087 — -- — — — — -- — <br /> 05/26/2004 P 4209 2169 2040 <50 - <0 50 <0 50 <0 50 <050 <0 50* 390 <br /> 08/05/2004 P 1 4209 2300 1909 <50 -- <0 50 <0 50 <050 <0 50 <0 50* 530 <br /> 11/12/2004 P 4209 2140 2069 <50 <0 50 <0 50 <0 50 <050 <0 50* 375 <br /> 02111/2005 P 4209 2072 21 37 <50 — <0 50 <0 50 <050 <0 50 <0 50* 290 <br /> 05/3/12005 P 4209 2020 2189 <50 -- <050 <050 1 <050 <0 50 <0 50* 350 <br /> MW-11 07/28/2003 P 1 4418 2370 2048 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 420 <br /> 11/26/2003 P 4418 2378 2040 <50 -- <0 50 073 <0 50 054 <0 50* 480 <br /> 02/16/2004 P 4418 2402 2016 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 30 <br /> 05/26/2004 P 4418 24 08 2010 <50 — <050 <0 50 <0 50 <0 50 <0 50* 250 <br /> 08/05/2004 P 4418 2532 1886 <50 — <050 <0 50 <0 50 <0 50 <0 50* 270 <br /> 11/12/2004 P 4418 2386 2032 <50 — <0 50 <0 50 <0 50 <0 50 <0 50* 550 <br /> 02/11/2005 P 4418 2302 2116 <50 — <0 50 <0 50 <0 50 <0 50 <0 50* 370 <br /> 06131/2005 1 P 1 4418 1 2254 1 2164 <50 <0 50 <0 50 <0 50 <0 50 <0 50* 530 <br /> MW-12 07/28/2003 P 4383 2335 2048 <50 -- <050 <050 <0 50 <0 50 <0 50* 30 <br /> 11/26/2003 P 4383 2339 2044 <50 -- <050 <0 50 <0 50 <0 50 <0 50' 250 <br /> 02/16/2004 P 4383 2364 2019 <50 — <0 50 <0 50 <0 50 <0 50 <0 50* 20 <br /> 05/26/2004 P 4383 2372 2011 <50 — <0 50 <0 50 <0 50 <0 50 <0 50* 250 <br /> 08/05/2004 P 4383 2496 1887 <50 — <0 50 1 <0 50 <0 50 <0 50 <0 50* 230 <br /> 11/12120D4 P 4383 2349 2034 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 318 <br /> 02/11/2005 P 4383 2265 2118 <50 — <050 <0 50 <0 50 <050 <0 50* 40 <br /> 05/31/2005 P 4383 2218 21 65 <50 -- <0 50 <050 <0 50 <0 50 <0 50* 370 <br /> MW-13D 07/28/2003 P 4351 2426 1925 <50 — <0 50 <0 50 <0 50 <0 50 7 8* 310 <br /> 11/26/2003 P 4351 2419 1932 <50 — 050 083 <0 50 060 2 6* 150 <br /> 02/16/2004 P 4351 2441 1910 <50 — <050 052 <0 50 053 2 7* 220 1 <br /> Report Date July 21,2005 Page 4 of 6 <br />