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Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station No 6020 <br /> 1711 E Yosemite, 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) (frg/L) (Frg/L) (frglL) (Vg/L) (ug/L) (Erg/L) (yg/L) (mglL) Comments <br /> MW-9 02/17/2003 NP 4369 2204 2165 <50 <0 50 <0 50 <0 50 <0 50 <0 50* 31 <br /> 04/28/2003 P 4369 2219 2150 <50 - <0 50 <0 50 <0 50 <0 50 <0 50* 37 <br /> 07/28/2003 P 4369 2312 20 57 <50 — <0 50 <0 50 <0 50 <0 50 <0 50* 36 <br /> 11/26/2003 P 4369 2316 2053 <50 — <0 50 <0 50 <0 50 <0 50 <0 50* 3 0 <br /> 02/16/2004 P 4369 2353 2016 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 25 <br /> 03/11/2004 P 4369 2300 2069 — - -- — -- -- -- — <br /> 05/26/2004 P 4369 23_61 1 2008 <50 -- <0 50 1 <0 50 I <0 50 I <0 50 <0 50* 1 29 <br /> MW-10 2/15/2001 4209 1902 2307 <50 — <05 <05 <0 5 <0 5 <2 5 -- <br /> 6/1/2001 -- 4209 1940 2269 <50 -- <05 <05 <0 5 <0 5 <2 5 — <br /> 9/11/2001 -- 4209 2097 2112 <50 -- <05 <G5 <0 5 <0 5 <2 5 18 <br /> 12/20/2001 - 4209 2032 2177 <50 - <05 <0 5 <0 5 <0 5 <2 5/<2 0* 27 <br /> 3/20/2002 4209 1921 2288 <50 <05 <0 5 <0 5 <0 5 <2 5/<0 5 27 <br /> 6/20/2002 P 4209 2018 2191 <50 -- <05 <0 5 <0 5 <0 5 <0 5* 26 <br /> 9/24/2002 P 4209 2081 2128 <50 <05 <0 5 <0 5 <0 5 <0 5* NA <br /> 11/27/2002 P 4209 2024 2185 <50 — 074 <0 5 <0 5 <0 5 <0 5* 47 <br /> 02/17/2003 NP 4209 2023 21 86 <50 — <0 50 <0 50 <0 50 <0 50 <0 50* 32 <br /> 04/28/2003 NP 4209 2040 2169 <50 <0 50 <0 50 <0 50 <0 50 <0 50* 47 <br /> 07/28/2003 P 4209 21 30 2079 <50 — <0 50 <0 50 <0 50 <0 50 <0 50* 3 8 <br /> 11/26/2003 P 4209 2148 2061 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 32 <br /> 02/16/2004 P 4209 21 11 2098 <50 <0 50 <0 50 <0 50 <0 50 <0 50* 4 2 <br /> 03/11/2004 P 4209 21 22 2087 -- -- -- -- -- -- -- — <br /> 05126/2004 P 1 4209 1 21 69 1 2040 1 <50 -- <0 50 1 <050 1 <0 50 1 <0 50 1 <0 50* 1 39 <br /> MW-11 07/28/2003 P 4418 2370 2048 <50 — <0 50 <0 50 <0 50 <0 50 <0 50* 42 <br /> 11/26/2003 P 4418 2378 2040 <50 <050 073 <0 50 054 <0 50* 4 8 <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 2408 2010 <50 -- <050 <0 50 <0 50 <0 50 <0 50* 2 5 <br /> MW-12 07/28/2003 P 4383 2335 2048 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 3 0 <br /> 11/2612003 P 4383 2339 2044 <50 — <0 50 <0 50 <0 50 <0 50 <0 50* 2 5 <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* 25 <br /> MW-13D 107128120031 P 1 4351 1 2426 1925 1 <50 1 1 <0 50 1 <0 50 1 <0 50 1 <0 50 7 8* 31 <br /> Report Date July 19,2004 Page 3 of 5 <br />