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Table 1 <br /> Groundwater Elevation and Analytical Data <br /> Former ARCO Service Station No 2168 <br /> 441 W Charter Way, Stockton, 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) (pglL) (pglL) (p91L) (pg1L) (pg1L) (pglL) (mglL) Comments <br /> MW-1 05/29/2003 — 1045 -- — — — — — -- -- — — Not Sampled <br /> 08/04/2003 P 1045 2308 -1263 6,700 R — 2,200 <50 <50 160 <50 1 11 <br /> 11/0312003 P 1045 2423 -1378 3,700 — 1 000 <25 28 81 27 212 <br /> 02/09/2004 P 1045 2397 -1352 5,300 — 1,200 <25 74 64 <25 296 <br /> 05/10/2004 P 1045 2311 -1266 3,900 — 890 <50 <50 <50 <50 219 <br /> 08/09/2004 P 104 2424 -1379 14,000 1 4,200._j 97 J 440 250 <50 13 <br /> MW-18 8/30/2000 -- 1026 2125 -1099 504 -- 160 69 12 262 <2 NA <br /> 11/21/2000 — 1026 2136 -11 10 1,50014] — 506 165 255 553 <2 NA <br /> 2/15/2001 1026 2162 -1136 721 [7] — 233 102 175 242 <2 08 <br /> 5117/2001 1026 2095 -1069 425[5] — 158 395 909 73 <2 29 <br /> 8/16/2001 — 1026 2234 -1208 67 — 066 <0 5 22 15 <2 2 <br /> 12/6/2001 — 1026 2337 -1311 77[8] — 30 063 22 13 <0 50 11 <br /> 2/14/2002 - 1026 2171 -1145 <50 — 5 8 068 <0 50 076 <0 50 17 <br /> 6/13/2002 -- 1026 2206 -1180 <50 -- 3 6[11] <0 50 <0 50 0 60[11] <0 50 13 <br /> 8/22/2002 — 1026 2314 -1288 <50 — 28 <0 50 <0 50 052 <050 11 <br /> 11/13/2002 -- 1026 2400 -1374 <50 - 7 <0 50 <0 50 <0 50 40 50 -- <br /> 02/12/2003 -- 1026 -- — -- -- -- -- -- — — Not Sampled <br /> 05/29/2003 - 1026 — — — -- -- -- -- -- - — Not Sampled <br /> 08/04/2003 P 1026 2317 -1291 <50 — <0 50 <0 50 <0 50 <0 50 <0 50 219 <br /> 11/03/2003 P 1026 2470 -1444 <50 -- 076 <0 50 <0 50 <0 50 <0 50 221 <br /> 02/09/2004 P 10 26 2456 -1430 <50 — <0 50 <050 <0 50 <0 50 <0 50 284 <br /> 05/10/2004 P 1026 2308 -1282 <50 — <0 50 <050 <0 50 <0 50 <0 50 176 <br /> 0810912004 P 1 1026 1 2435 1 -1409 1 <50 1 -- <0 50 <0 50 <0 50 <0 50 <0 50 5 7 <br /> MW-1C 8/30/2000 -- 1021 2219 -1198 537 — 63 <2 <2 406 <2 NA <br /> 11/21/2000 — 1021 2169 -1148 62 3[4] -- 569 121 0 999 351 <2 NA <br /> 2/15/2001 -- 1021 2180 -1159 <50 — 988 142 164 259 <2 08 <br /> 5/17/2001 — 1021 2123 -1102 <50 — 909 0 708 157 1 18 <2 11 <br /> 8/16/2001 — 1021 2266 -1245 <50 -- 42 065 <0 5 083 <2 24 <br /> 12/6/2001 — 1021 2357 -1336 <50 — 93 <0 50 14 072 <0 50 13 <br /> 2/14/2002 — 1021 2217 -1196 <50 — 10 059 18 17 <0 50 18 <br /> 6/13/2002 -- 1021 2241 -1220 4 8[11] — <0 50 0 9[11] 0 66[11] <0 50 <0 50 1 3 <br /> 8/22/2002 -- 1021 2329 -1308 <50 — 4 <0 50 1 1 099 <0 50 13 <br /> Report Date September 24,2004 Page 2 of 12 <br />