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i i • <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 /> Well Date P/ Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO <br /> Number Sampled NP (feet msl) (feet bgs) (feet msl) (ug1L) (pg1L) (ppglL) (pg1L) WglL) (pg/L) (pg/L) (mg1L) Comments <br /> MW-5 2/15/2001 -- 4361 2088 2273 <50 -- <0 5 <05 <0 5 <0 5 <25 -- <br /> 6/1l2001 - 4361 21 22 2239 <50 — <0 5 <0 5 <0 5 <0 5 <25 -- <br /> 9/11l2001 4361 2248 2113 <50 -- <0 5 <0 5 <0 5 <0 5 <2 5 25 <br /> 12/20/2001 - 4361 2225 2136 <50 -- <0 5 <0 5 <0 5 <0 5 <2 5/<2 0* 21 <br /> 3/20/2002 — 4361 2102 2259 <50 -- <05 <G5 <0 5 <0 5 <2 5/<0 5* 35 <br /> 612012002 P 4361 2195 2166 <50 — <br /> <05 <05 <0 5 <05 <0 50* 4 <br /> 9/24/2002 P 4361 2257 21 04 <50 — <05 <05 <0 5 <05 <0 50* NA <br /> 11/27/2002 P 4361 2191 2170 <50 — <0 5 <0 5 <0 5 <05 <0 50* 56 <br /> 02/17/2003 NP 4361 2207 2154 <50 — <0 50 <0 50 <0 50 <0 50 <0 50* 430 <br /> 04/28/2003 P 436 1 2223 2138 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 530 <br /> 07/28/2003 P 4361 2314 2047 <50 — <0 50 <0 50 <0 50 <0 50 <0 50* 460 <br /> 11/26/2003 P 4361 2319 2042 <50 — <0 50 <0 50 <0 50 <0 50 <0 50* 480 <br /> 02/16/2004 P 4361 2351 2010 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 450 <br /> 05126!2004 P 4361 2358 2003 <50 <0 50 <0 50 <0 50 <0 50 <0 50* 510 <br /> 08/05/2004 P 4361 2478 1883 <50 <0 50 <0 50 <0 50 <0 50 <0 50* 450 <br /> 11/12/2004 P 4361 2331 2030 <50 — <0 50 <0 50 <0 50 <0 50 <0 50* 529 <br /> 02111/2005 P 4361 2248 2113 <50 — <0 50 <0 50 <0 50 <0 50 <0 50* 330 <br /> 05/31/2005 P 4361 21 99 2162 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 40 <br /> 08118/2005 P 43 61 2204 2157 <50 -- <0 50 <050 <0 50 <050 <0 50* 540 <br /> MW-6 2/15/2001 4365 2092 2273 <500 -- <5 <5 <5 <5 1,260 -- <br /> 611l2001 -- 4365 2127 2238 <500 - <5 <5 <5 <5 4,200 -- <br /> 9111/2001 4365 2251 2114 <5 000 - <50 <50 <50 <50 3,800 08 <br /> 12/20/2001 - 4365 2232 21 33 <50 — <05 <0 5 <0 5 <0 5 7412,400* 13 <br /> 3/20/2002 - 4365 2106 2259 <50 -- <0 5 <0 5 <0 5 <0 5 2701270* 12 <br /> 6/20/2002 P 4365 2200 2165 150 — <0 5 <0 5 <0 5 <0 5 260* 1 5 <br /> 9/24/2002 P 4365 2262 21 03 <50 <0 5 <0 5 <0 5 <0 5 770* NA <br /> 11!2712002 P 4365 21 95 21 70 <5,000 -- <br /> <50 <50 <50 <50 2,200* 1 2 <br /> 02/17/2003 P 4365 2211 2154 <5,000 -- <50 <50 <50 <50 340* 20 <br /> 04/28/2003 P 4365 2228 2137 100 — <0 50 <0 50 <0 50 <0 50 230* 340 <br /> 07/28/2003 P 4365 2319 2046 88 R — <25 <25 <2 5 <25 200* 20 <br /> 11/26/2003 P 43 65 2324 2041 99 R -- <0 50 <0 50 <050 <0-5 0 170* 120 <br /> 02/16/2004 P 4365 1 2353 2012 <50 -- <25 <2 5 <2 5 <2 5 59* 1 60 <br /> 05/26/2004 P 4365 2362 2003 <50 — <10 <1 0 <1 0 <1 0 74* 20 <br /> Reporf Date October 26,2005 T �� µ Page f of 6 <br />