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• ! • <br /> 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 /> j Well Date P! Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO <br /> Number Sampled NP (feet msl) (feet bgs) (feet ms]) (pglL) (pglL) (pg1L) (pg1L) (,vg1L) (pg1L) (ug1L) (mglL) Comments <br /> MW-9 3/20/2002 -- 4369 2098 2271 <50 — <05 <05 <0 5 <0 5 <2 51<0 5* 21 <br /> 6/20/2002 P 4369 2192 2177 <50 -- <05 <05 <0 5 <05 <0 50* 18 <br /> 9/2412002 P 4369 2252 2117 <50 — <05 <05 <0 5 <05 <0 5* NA <br /> 11/27/2002 P 4369 2190 2179 <50 - <05 <0 5 <0 5 <05 <0 5* 35 <br /> 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 21 50 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 37 <br /> 07/28/2003 P 4369 2312 2057 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 36 <br /> 11/26/2003 P 4369 2316 2053 <50 — <050 <0 50 <0 50 <050 <0 50* 30 <br /> 02/16/2004 P 4369 2353 2016 <50 -- <050 <0 50 <0 50 <0 50 <0 50* 25 <br /> 03/1 V2004 P 4369 2300 2069 -- -- — -- — — -- I — I <br /> 05126/20041 P 1 4369 1 2361 1 2008 <50 — <0 50 <0 50 <050 <0 50 <0 50* 2 9 <br /> 108/05120041 P 1 4369 1 2473 1 1896 <50 -- <0 50 <0 50 <0 50 <0 50 <0 5o* 2 8 <br /> MW-10 2/15/2001 -- 42 09 1902 2307 <50 -- <0 5 <0 5 <0 5 <05 <25 — <br /> 6/1/2001 — 4209 1940 2269 <50 — <0 5 <05 <0 5 <0 5 <2 5 — <br /> 9/11/2001 — 4209 2097 2112 <50 -- <05 <05 <0 5 <0 5 <2 5 1 8 <br /> 12/20/2001 — 4209 2032 2177 <50 -- <05 <05 <05 <0 5 <2 51<2 0* 27 <br /> 3/20/2002 — 4209 1921 2288 <50 — <05 <0 5 <0 5 <0 5 <2 51<0 5 27 <br /> 6/20/2002 P 4209 2018 2191 <50 -- <05 <0 5 <0 5 <0 5 <0 5* 2 6 <br /> 9/24/2002 P 4209 2081 21 28 <50 — <05 <0 5 <0 5 <0 5 <0 5* NA <br /> 11/27/2002 P 4209 2024 21 85 <50 -- 074 <0 5 <0 5 <0 5 <0 5* 4 7 <br /> 02/17/2003 NP 4209 2023 2186 <50 — <0 50 <0 50 <0 50 <0 50 <0 50* 32 <br /> 04/28/2003 NP 4209 2040 2169 <50 — <050 <0 50 <0 50 <0 50 <0 50* 47 <br /> 07/28/2003 P 4209 21 30 2079 <50 — <050 <050 <0 50 <0 50 <0 50* 3 8 <br /> 11/26/2003 P 4209 21 48 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* 42 <br /> 03111/2004 P 4209 2122 2087 -- -- -- — — -- — — <br /> 05/26/2004 P 4209 2169 2040 <50 -- <050 <0 50 <0 50 <0 50 <0 50* 3 9 <br /> 0810512004 P 4209 2300 1 1909_ 1 <50 -- <0 50 <0 50 1 <0 50 1 <0 50 1 <0 50* 1 53 <br /> MW-11 07/28/2003 P 4418 2370 2048 <50 — <0 50 <0 50 <0 50 <0 50 <0 50* 4 2 <br /> 11/26/2003 P 4418 2378 2040 <50 — <0 50 073 <0 50 054 <0 50* 48 <br /> 02/16/2004 P 4418 2402 2016 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 3 0 <br /> 05/26/2004 P 4418 2408 2010 <50 -- <050 <0 50 <0 50 <0 50 <0 50* 25 <br /> Report Date September 23,2004 � � — Page 3 of 5 <br />