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• • <br /> Page 2of4 <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> Former ARCO Service Station#4493 <br /> 205 N Center St,Stockton,CA <br /> Well Depth Groundwater Groundwater Ethyl- Xylenes WBE MtBE <br /> Well Date Elevation to Water Elevation Elevation TPH9 Benzene Toluene benzene (total) (8020) (8260) DO <br /> Number Sampled (h MSL} (h TOG) (h MSL) Change(ft) (ppb) (ppb) (ppb) (ppb) _(ppb) (ppb) (peb) (m5/L) <br /> MW-4 2/16A999 1219 1441 -222 -- 15,000 503 ND 707 1,550 9,990 — — <br /> 3/10/1999 1361 1 42 0 8 — -- — -- — — <br /> 6/17/1999 1243 024 1 18 10 800 230 177 597 936 766 <br /> 9/24/1999 NP 1272 053 029 4 880 173 <10 0 262 <10 670 4 9 <br /> 12/16/1999 NP 1517 2 98 245 7 630 260 <10 0 570 113 1,310 — 1 9 <br /> 3/26/2000 P 1283 064 2 34 5,330 298 <20 0 316 443 4 960 -- 1 00 <br /> 6/19!2000 P 1244 025 0 39 2,860 186 QO 0 223 123 3,790 <2 0 382 <br /> 9/19/2000 P 1332 -1 13 08a 3 460 234 <10 0 300 150 2 210 1,710 0 8 <br /> 111=2001) P 1444 -225 1 12 $640 219/177" <5 00 499/389' 39 0127 0' — 427 0 73 <br /> 9/1312001 P 1226 0 07 218 1 600 110!79' <10<20' 21/<20* 11124` — 680 0 72 <br /> 12131/2001 P 1260 0 41 -034 <50 <0 50/<1 0' <0 50/<1 0' <0 50/<1 0' <0 50/<1 W -- <0 50 <br /> 3/13/2002 P 1626 407 3 66 960 27/25' <5 0/0 96' <5 0/3 5' <5 0/4 7' 120 098 <br /> 6118/2002 P 1466 247 1 60 510 42 <0 5 2 8 1 9 130 1 2 <br /> 9/16/2002 P 1259 1524 265 058 860 61 <2 5 2 8 2 8 — 150 <br /> 12/5/2002 P 1660 4 01 -1 36 1,400 23 5 4 <2 5 12 — 140 0 0 <br /> 3/14/2003 P 1652 -393 008 2,100 76 19 12 28 — 180 1 0 <br /> MW-5 6/19/2000 P 1203 12 98 095 <50 275 <0 500 <0 500 <0 500 <2 50 <2 0 209 <br /> 9/19/2000 P 1365 1 62 067 <50 1 19 <0 500 <0 500 <0 500 <2 50 <2 0 0 6 <br /> 11/3011000 P 1488 286 1 23 <50 0 0 694 <0 500 <0 500 <0 500 — <2 00 1 21 <br /> 9/13/2001 P 1598 395 1 10 <50 <0 50/<2 0' <0 50/<2 0' <0 50/<2 0' <0 50/<2 0' -- <2 0 088 <br /> 12M=01 P NS — -- 54` 7 21/5 9' <0 50/<1 0' 1 5/1 0' <0 50/<1 0' — 60 -- <br /> 3/1312002 P 1878 -675 — 370 32/27` 0 67/0 51 39/40' 3 1/2 4' 200 0 46 <br /> 6/28/2002 P 1730 527 1 48 460 15 <0 5 4 9 1 1 1,100 0 9 <br /> 9/16/2002 P 1799 596 069 510 16 410 140 140 750 — <br /> 12/5/2002 P 1443 1928 485 1 29 510 14 <10 19 17 — 180 1 3 <br /> 3/14/2003 P 1926 -482 0 03 380 35 <2 5 <2 5 <2 5 — 190 5 <br /> MW-6 6/1912000 P 1326 1381 055 -- <50 1 87 <0 500 0 523 2 34 171 144 1 83 <br /> 9/1912000 P 1456 130 075 <50 1 30 <0 500 <0 500 <0 500 119 102 0 7 <br /> 11/3011000 P 1579 2 53 -1 23 <50 0 <0 500 <0 5001108' <0 500 <0 500/8 00' 412 064 <br /> 911 312 0 0 1 P 1360 0 34 219 <50 <0 50/<2 0' <0 50/<2 0' <0 50/<2 0' <0 50/<2 0' <2 0 078 <br /> 12/3111001 P 1463 1 37 1 03 <50 <0 501<1 0' <0 50/<1 0' <0 50/<1 0` <0 50/<1 0' — <0 50 — <br /> 3/1312002 P 1681 -355 218 <50 <0 50/<0 50' <0 50/<0 SW <0 50/<0 50' <0 50/<0 50` — 066 - <br /> 6/28/2002 P 1474 1 48 207 <50 <0 5 <0 5 <0 5 <0 5 -- 085 1 2 <br /> 9/16/2002 P 1281 1559 278 085 <50 <0 5 <0 5 <0 5 <0 5 — 087 <br /> 12/511002 P 1693 412 -1 34 <50 <0 5 <0 5 <0 5 <0 5 0 76 2 7 <br /> 3/1412003 P 1674 -393 019 <50 <0 5 <0 5 <0 5 <0 5 -- 065 5 <br /> MW 7 6/19/2000 P 11 07 11 87 080 — <50 <0 500 <0 500 <0 500 <0 500 <2 50 12 0 1 78 <br /> 9/19/2000 P 1259 1 52 072 <50 <0 500 <0 500 <0 500 <0 500 <2 50 <2 0 1 0 <br /> 11/30/2000 P 1383 2 76 1 24 <50 0 <0 500 <0 500/3 80' <0 500 <0 500/8 96' -- 2 34 062 <br /> 9/13/2001 P 1217 1 10 1 66 <50 4 8<2 0' <0 50/C2 0' <0 50/<2 0' <0 50/<2 0' — <2 0 1 09 <br /> 12/31/2001 P 1321 214 -1 04 900 17/8 6' c0 50/<i 0' 0 64/<1 0' 6 014 4' -- 9 9 — <br /> 3/13/2002 P 1495 388 -1 74 870 11/1 5 <0 50/<0 50' <0 50/<0 50' 1 2/0 72' — 18 0 46 <br /> 6/2M2002 P 1357 250 1 38 370 10 <0 5 <0 5 0 62 — 53 1 7 <br /> 9/16/2002 P 1061 1419 358 -0 62 610 86 <1 0 <1 0 11 53 — <br /> 12/5/2002 P 1550 -489 1 31 270 32 <1 0 <1 0 <1 0 -- 41 1 5 <br /> 3/14/2003 P 15 47 -486 0 03 260 15 <1 0 <1 0 <1 0 — 15 0 5 <br /> l <br /> K}WproceseU6 BP ARC01044831Quarterlyil_Q7R 0344483(3Wk1n1003 <br />