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Table 1 <br /> Groundwater Elevation and Analytical Data <br /> Former ARCO Service Station No 4493 <br /> 205 N Center Street, 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) (pg/L) (pg/L) (pg/L) (pg1L) (pg/L) (pg1L) (pg/L) g/L) Comments <br /> MW-5 03/14/2003 P 1443 1925 -482 380 — 35 <25 <2 5 <2 5 190* 5 <br /> 06/0912003 P 1443 1858 -415 140 R - <5 0 UJ <5 0 UJ <5 0 UJ <5 0 UJ 130*J 09 <br /> 09/25/2003 P 1443 1898 -455 <50 -- <2 0 <2 0 <20 <2 0 49* 1 3 <br /> 12/23/2003 P 1443 1980 -537 82 - <50 <50 <50 <50 26* 1 1 <br /> 03/08/2004 P 1443 1871 -428 88 - <50 <50 <5 0 <5 0 58* 12 <br /> 0610912004 P 1443 18 85 -442 <50 — <50 <50 <5 0 <50 55* 07 Water Levels taken on <br /> 618104 <br /> MW-6 6/19/2000 P 1326 1381 -055 <50 — 1 87 <0 5 0 523 234 171!144* 183 <br /> 9/19/2000 P 1326 1456 -130 <50 -- 1 3 <05 <0 5 <0 5 119!102* 07 <br /> 11/30/2000 P 1326 1579 -253 <50 — <05 <0 512 08* <0 5 <0 5/8 0* 412* 064 <br /> 9/13/2001 P 1326 1360 -034 <50 -- <0 5/<2 0* <0 5/<2 0* <0 5/<2 0* <0 5/<2 0* <2 0* . 078 <br /> 12/31/2001 P 1326 1463 -137 <50 -- <0 51<1 0* 1 <0 5/<1 0* <0 51<1 0* <0 5/<1 0* <0 5* — <br /> 3/13/2002 P 1326 1681 -355 <50 -- <0 51<0 5* <0 5/<0 5* <0 51<0 5* <0 5/<0 5* 0 66* — <br /> 6/28/2002 P 1326 1474 -148 <50 — <05 <05 <0 5 <0 5 0 85* 1 2 <br /> 9/16/2002 P 1281 1559 -278 <50 — <05 <G5 <0 5 <0 5 0 87* -- <br /> 12/5/2002 P 1281 1693 -412 <50 -- <0 5 <05 <0 5 <05 0 76* 27 <br /> 03/1412003 P 1281 1674 -393 <50 — <0 50 <0 50 <0 50 <0 50 0 55* 05 <br /> 06/09/2003 P 1281 1591 -310 <50 — <1 0 UJ <1 0 UJ <1 0 UJ <1 0 UJ <1 0*UJ 16 <br /> 09/25/2003 P 1281 1677 -396 <50 — <1 0 <1 0 <1 0 <1 0 <1 0* 1 1 <br /> 12/23/2003 P 1281 1689 -408 <50 -- <10 <1 0 <1 0 <1 0 <1 0* 1 3 <br /> 03/08/2004 P 1281 1585 1 -304 <50 -- <10 <1 0 <1 0 <1 0 <1 0* 26 <br /> 06/09/2004 P 1281 1631 -350 <50 — <1 0 <1 0 <1 0 <1 0 <1 0* 07 Water Levels taken on <br /> 618104 <br /> MW-7 6/19/2000 P 11 07 1187 -080 <50 -- <05 <05 <0 5 <0 5 <2 51<2 0' 1 78 <br /> 9/19/2000 P 1107 1259 -1 52 <50 <0 5 <05 <0 5 <0 5 <2 5/<2 0* 1 <br /> 11/3012000 P 1107 1383 -276 <50 -- <0 5 <0 5/3 8* <05 <0 518 96* 2 34* 062 <br /> 9113/2001 P 1107 1217 -1 10 <50 4 81<2 0* <0 51<2 0* <0 51<2 0* <0 5/<2 0* <2 0' 1 09 <br /> 12131/2001 P 1107 1321 -214 900 1718 6* <0 51<1 0* 0 641<1 0* 6 0/4 4* 9 9* — <br /> 3/13/2002 P 11 07 1495 -388 870 11/1 5* <0 51<0 5* <0 51<0 5* 12/0 72* 18* 046 <br /> 6/28/2002 P 1107 1357 -250 370 10 <0 5 <0 5 0 62 53* 1 7 <br /> 9/16/2002 P 1061 1419 -358 510 — 86 <1 0 <1 0 11 53* — <br /> 121512002 P 1061 1550 -489 270 — 32 <1 0 <1 0 <1 0 41* 15 <br /> 03/14/2003 P 1061 1547 -486 260 — 1 5 <1 0 <1 0 <1 0 15* 0 5 <br /> Report Date July 29,2004 Page 4 of 8 <br />