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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) (pglL) (pglL) (pglL) (pglL) (mg1L) Comments
<br /> MW-4 8118!1999 - 1234 2309 -1075 34,400 -- 7,390 4,200 1,260 3,610 572 NA (58)
<br /> 12/17/1999 - 1234 2398 -1164 14,700 -- 5,030 859 538 291 586 NA (58),[2]
<br /> 2/22/2000 -- g234 23 26 -1092 1810 477208 73 6 182 622 NA (58)
<br /> fi122/2000 -- 21 97 -9 63 12,000 - 4,200 35 2 294 224 46 8 NA (59)
<br /> 8!3012000 -- 22 99 -1065 , 8,180 687 748 1,170 90 NA
<br /> 11/21/2000 - 2369 -11 35 13,200[4] - 4,540 <50 438 306 57 6 NA
<br /> 2/15/2001 - 1234 2316 -1144 24,800[6] -- 6 188 790 566 552 1
<br /> 5!17!2001 - 12 34 23 01 -10 67 16,600[5] -- 4,720 117 498 514 58 2 1 6
<br /> 8/16/2001 -- i2 34 2434 -1200 20,000 - 4 900 110 830 910 <100* 19
<br /> 12/6/2001 -- --i-2-3-4 25 45 -13 11 <50,000 -- 6,200 X500 800 660 <500* 1
<br /> 2/14/2002 -- 1234 2389 -1155 20,000 - 5,800 200 1,100 890 <100[10] 1
<br /> 6/13/2002 - 12 34 24 15 -11 81 21,000 4 400 170 860 790 <50[10] 08
<br /> 8!2212002 -- 1234 25 18 -1284 32,004 - 9,70Q 800 1,600 1,700 100 0 8
<br /> 11/13/2002 12 26 -13 76 <50,000 -- 15 000 <500 1,900 <500 <500 -
<br /> 34 10
<br /> -621121-2003 P 1234 2601 -1367 <50 - 14 <0 50 1 0 <0 50 <0 50 207
<br /> 05129!2003 P 12 34 24 81 -12 47 14,000 -- 4,400 <25 490 120 <100 4 31
<br /> 08104!2003 P i 2 34 25 21 -12 87 20,000 R -- 7 100 <100 810 140 <100 1 71
<br /> 11/03/2003 P 1234 25 96 -13 62 <50 R -- <2 5 R <2 5 R <2 5 R <2 5 R <2 5 R 1 11
<br /> -62/09/2004 P 12 34 25 62 -13 28 11,000 - 4,100 <50 180 110 80 144
<br /> 0511012004, P 1 1234 2520 -12 86 4,800 -- 910 <50 <50 <50 <5o 101
<br /> MW-5 2!1611995 -- 928 3578 -2650 180,000 - 8,500 15,000 2200 12,000 NA NA (39)
<br /> 5/17/1995 - 928 3123 -2195 22 000 -- 3 400 2,100 390 2,400 NA NA (55)
<br /> 8/15/1995 -- 9 28 30 83 -21 55 32,000 -- 4,200 3 504 410 2,500 NA NA (55)
<br /> 11129!1995 - 928 3100 -2172 52 000 - 8,300 8,100 810 4,100 NA NA (55)
<br /> 2/27/1996 - 928 2819 -1891 20,000 - 3,200 1,900 440 1,840 NA NA
<br /> 5/15/1996 -- 9 28 26 66 -17 38 43,000 - 6,500 5,000 79Q 3,400 <500`[1] NA (55)
<br /> 8/22/1996 9 28 27 i4 -17 86 58,000 - 8,700 8 200 880 4,500 <500*[1] NA
<br /> 11!25/1996 - 9 28 27 33 -18 05 53 000 7,000 6,1 Q0000 800 4, <600-11) NA
<br /> 2!2411997 _ 9 28 2330 -1402 40,000 4 400 4,700 590 3,100 <700"[i) NA
<br /> 5/19/1997 - 928 2321 -1393 43 000 5,500 4 300 660 3,800 <300*[1] NA
<br /> 8/21/1997 9 28 24 29 -15 D1 32 ODO
<br /> 5200 3,900 560 3 100 <1,000[1]** NA (54)
<br /> 11!1711997 -- 928 2533 -1605 10 000 -- 1,700 1,300 210 1,100 <500**[1] NA M(55)
<br /> 2!9!1998 - 9 28 22 62 -13 34 4,700 - 740 520 110 520 <25**[1] NA j
<br /> Page 6 of 12
<br /> Report Date July 15,2004
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