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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 /> Top of Depth to Water Level Ethyl- Total
<br /> Well Date P/ Casing Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO
<br /> Number Sampled NP Elevation (feet bgs) (feet msl) (pg/L) (pglL) (pglL) (Erg/L) (pglL) (pg/L) (Pg/L) (mglL) Comments
<br /> MW-4 2/15/2001 -- 1234 2378 -1144 24,800[61 -- 6200 188 790 566 552 1
<br /> 5/17/2001 - 1234 2301 -1067 16,600[5] - 4 720 117 498 514 582 16
<br /> 8/16/2001 - 1234 2434 -1200 20,000 -- 4,900 110 830 910 <100* 19
<br /> 12/6/2001 -- 1234 2545 -1311 <50,000 - 6,200 <500 800 660
<br /> <500* 1
<br /> 2/14/2002 - 1234 2389 -1155 20 000 5 800 200 1,100 890 <100[10] 1
<br /> 6/13/2002 - 1234 2415 -1181 21,000 -- 4 400 170 860 790 <50[10] 08
<br /> 8/22/2002 - 1234 2518 -1284 32,000 - 9,700 800 1,600 1,700 100 08
<br /> 11/13/2002 - 1234 2610 -1376 <50,000 -- 15,000 <500 1,900 <500 <500 --
<br /> 02/1212003 P 1234 2601 -1367 <50 - 14 <0 50 10 <0 50 <0 50 207
<br /> 05/29/2003 P 1234 2481 -1247 14,000 -- 4,400 <25 490 120 <120 1 431
<br /> 08/04/2003 P 1234 2521 -1287 20,000 R -- 7,100 <100 810 140 <100 171
<br /> 11/03/2003 P 1234 2596 -1362 <50 R - <25 R <25 R <2 5 R <25 R <2 5 R 1 11
<br /> 02/0912004 P 1234 2562 -1328 11,000 -- 4,100 <50 180 110 80 144
<br /> MW-5 2/16/1995 -- 928 3578 -2650 180,000 - 8,500 15,000 2,200 12 000 NA NA (39)
<br /> 5/17/1995 -- 928 3123 -21 95 22,000 -- 3,400 2100 390 2 400 NA NA (55)
<br /> 8/15/1995 - 928 3083 -2155 32,000 - 4200 3,500 410 2,500 NA NA (55)
<br /> 11/29/1995 - 928 3100 -2172 52,000 -- 8,300 1 8,100 810 4,900 NA NA (55)
<br /> 2/27/1996 -- 928 2819 -1891 20 000 - 3,200 1,900 440 1,800 NA NA
<br /> 5/15/1996 - 928 2666 -1738 43 000 - 6 500 5,000 790 3 400 <500'[1] NA (55)
<br /> 8/22/1996 -- 928 2714 -1786 58,000 8,700 8,200 880 4,500 <500'[1] NA
<br /> 11/25/1996 - 928 2733 -1805 53,000 -- 7,000 6,100 800 4,000 <600**[1] NA
<br /> 2/24/1997 -- 928 2330 -1402 40 000 - 4,400 4 700 590 3,100 <700**[1] NA
<br /> 5/19/1997 -- 928 2321 -1393 43,000 - 5,500 4,300 660 3,800 <300*[1] NA
<br /> 8/21/1997 -- 928 2429 -1501 32,000 -- 5,200 3,900 560 3,100 <1,000[1]** NA (54)
<br /> 11/17/1997 -- 928 2533 -1605 10,000 - 1,700 1 300 210 1 100 <500-11] NA (55)
<br /> 2/9/1998 -- 928 2262 -1334 4,700 -- 740 520 110 520 <25**[1] NA (55)
<br /> 5/21/1998 -- 928 1876 -948 1,380 - 167 148 264 125 <100 NA (54)
<br /> 8/12/1998 - 928 1996 -1068 2 450 - 472 250 642 284 <20 NA (54)
<br /> 11/9/1998 - 928 2009 -1081 13,800 2,490 1 890 337 1,640 <2 NA (54)
<br /> 2/17/1999 - 928 1926 -998 3130 - 438 285 864 386 <2 NA (54)
<br /> 5/25/1999 - 9 28 18654 -937 11,800 -- 2,060 1,060 <100 1,380 <2 NA (54)
<br /> 8/18/1999 -- 928 1980 -1052 34 400 - 23 800 1,130 342 1 500 <2 NA (54)
<br /> 12/17/1999 -- 928 2063 -1135 <50 -- 336 0 616 0 565 204 <2 NA (54),[2]
<br /> Report Date April 21,2004 Page 6 of 12
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