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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) (pg1L) (pg1L) W/L) (pg/L) (ugIL) (dug/L) (mglL) Comments <br /> MW-2 9/16/2002 NP 1206 1479 -273 <50 <25 <2 5 <2 5 <2 5 34* -- <br /> 12/5/2002 P 1206 1614 -408 51 -- <20 <2 0 <2 0 <2 0 31* 0 <br /> 03/14/2003 P 1206 1614 -408 <100 — <1 0 <1 0 <1 0 <1 0 1 7* 1 2 <br /> 06/09/2003 P 1206 1538 -332 53 R -- <1 0 <1 0 <1 0 <1 0 2 2* 14 <br /> 09/25/2003 P 1206 1574 -368 <50 — <1 0 <1 0 <1 0 <1 0 12* 12 <br /> 12/24/2003 P 1206 1645 439 <50 -- <1 0 <1 0 <1 0 <1 0 13* 18 <br /> 0310812004 P 1206 1544 -338 <50 -- <10 <1 0 <1 0 <1 0 12* 11 <br /> MW-3 2/16/1999 — 1251 1464 -213 ND -- ND ND ND ND 706 -- <br /> 3/10/1999 -- 1251 1399 .148 -- — — — -- -- -- — <br /> 6/17/1999 -- 1251 1297 -046 <50 — <05 <0 5 <0 5 226 144 — <br /> 9/24/1999 — 1251 — -- -- — — - -- -- -- — Well inaccessible <br /> 12/16/1999 NP 1251 15 53 -302 <50 — <05 <0 5 <05 <0 5 <25 41 <br /> 3/28/2000 P 1251 1321 -070 <50 — <05 <0 5 <0 5 <0 5 246 224 <br /> 6/19/2000 P 1251 1279 -028 <50 -- <0 5 <0 5 <0 5 <0 5 2781260* 198 <br /> 9/19/2000 P 1251 1371 -120 757 - 0 512 <0 5 <05 <0 5 2541241* 09 <br /> 11/30/2000 P 12 51 1487 -236 81 1 — 0 674 <0 5 <0 5 1 15 195* 076 <br /> 9/13/2001 P 1251 — -- -- -- -- — — — -- -- <br /> Well filled with sediment <br /> 12/31/2001 P 1251 1325 -074 1,900[2] 60/39* 8 7/<10* <5 0114* 30117* 150* -- <br /> 3/13/2002 P 1251 1661 410 <50 -- <0 5/<0 5* <0 5/<0 5* <0 5/<0 5* <0 51<0 5* 1* 108 <br /> 6/28/2002 P 12 51 1446 -195 <500 <50 <50 08 <50 <0 5* 1 1 <br /> 9/16/2002 P 1306 1510 -204 <50 <05 <05 <0 5 <0 5 0 69* — <br /> 12/5/2002 P 1306 1650 -344 <50 -- <05 <05 <0 5 <0 5 <0 5* 0 5 <br /> 03/14/2003 P 1306 1615 -309 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 1 8 <br /> 06/09/2003 P 1306 1566 -260 <50 -- <1 0 <1 0 <1 0 <1 0 <1 0* 14 <br /> 09/25/2003 P 1306 1597 -291 <50 <10 <1 0 <1 0 <1 0 <1 0* 090 <br /> 12/23/2003 P 1306 1671 -365 <50 - <10 <1 0 <1 0 <1 0 <1 0* 14 <br /> 03/08/2004 P 1306 1569 -263 <50 -- <1 0 <1 0 <1 0 <1 0 <1 0* 12 <br /> MW-4 2/16/1999 -- 1219 1441 -222 15,000 - 503 ND 707 1,550 9 990 -- <br /> 3/10/1999 1219 1361 -1 42 -- - -- -- — -- — - <br /> 6/17/1999 1219 1243 -024 10 800 - 230 177 597 936 766 — <br /> 912411999 NP 1219 1272 -053 4,880 — 173 <10 262 <10 670 4 9 <br /> 12/16/1999 NP 1219 1517 -298 7,830 260 <10 570 113 1,310 1 9 <br /> 3/28/2000 P 1219 1283 -064 5 330 298 <20 318 443 4 960 1 <br /> Report Date May 10,2004 Page 2 of 7 <br />