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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) (prglL) WIL) (Ug/L) (ErgIL) (pglL) (P91L) (mg/L) Comments
<br /> MW-1 2/16/1995 -- 1045 3711 -2666 36,000 - 11,000 460 990 3,200 NA NA (54)
<br /> 5/17/1995 - 1045 3261 -2216 38,000 -- 12,000 790 1,100 3,400 NA NA (53)
<br /> 8/15/1995 - 1045 3213 -2168 45,000 - 10,000 330 1,000 3,300 NA NA (54)
<br /> 11/29/1995 - 1045 3232 -2187 46,000 - 9,800 370 1,100 2,900 NA NA (54)
<br /> 2/27/1996 -- 1045 - -- - -- - - -- - - - Well Inaccessible
<br /> 5/15/9996 - 1045 2788 -1743 34,000 - 9,400 670 1 000 2,100 <25*[1] NA (53)
<br /> 8/22/1996 -- 1045 2850 -1805 35,000 - 9,100 1,000 1,000 2,000 <500*[1] NA (53)
<br /> 11/25/1996 - 1045 28 71 -1826 37,000 - 7,900 460 870 1,500 <500*[1) NA
<br /> 2/24/1997 - 1045 2466 -1421 37,000 - 8,300 740 900 2,200 <500*[1] NA
<br /> 5/19/1997 -- 1045 2454 -1409 30,000 -- 8,200 310 780 1,100 <600*[1] NA
<br /> 8/21/1997 - 1045 2562 -1517 28,000 - 8,200 380 860 1,100 <2,000"[1] NA (54)
<br /> 11/17/1997 -- 1045 2667 -1622 23,000 - 9,300 580 620 1,300 0,000**[1) NA (54)
<br /> 2/9/1998 - 1045 2409 -1364 20,000 - 6,800 360 700 1,100 <1,000**[1] NA (54)
<br /> 5/22/1998 - 1045 2008 -963 20,700 -- 6,650 413 588 1,030 <100 NA (53)
<br /> 8/12/1998 - 1045 2026 -981 22,000 - 8,690 510 785 1,220 <2 NA (53)
<br /> 11!911998 - 1045 2140 -1095 1 21,300 - 7,420 289 628 1,020 242 NA (53)
<br /> 2/17/1999 - 1045 2060 -1015 2 650 - 834 483 902 138 238 NA (53)
<br /> 5/25/1999 - 1045 1996 -951 22,600 - 8,410 291 854 1,160 308 NA (53)
<br /> 8/18/1999 - 1045 2195 -1150 19,400 - 7,860 228 670 958 116 NA (53)
<br /> 12!17/1999 - 1045 2190 -1145 15,900 - 5,630 121 379 579 344 NA (53),121
<br /> 2/22/2000 -- 10 45 21 13 -1068 19,700 - 8,830 228 800 932 193 NA (53)
<br /> 6122/2000 - 1045 1989 -944 19,900 - 6,020 139 401 486 13 2 NA (54)
<br /> 8/30/2000 - 10 45 2092 -1047 18,300 -- 8,600 254 654 650 228 NA
<br /> 11/21/2000 -- 10 45 2160 -11 15 6,620[4] - 1,570 703 908 199 128 NA
<br /> 2!1512001 - 1045 21 67 -1122 11,300[7] - 3,490 136 450 329 226 1
<br /> 5/17/2001 -- 1045 2090 -1045 8,630[5] - 3,190 <50 197 137 24 3 07
<br /> 8/16/2001 - 1045 2227 -1182 13,000 - 4,400 130 440 300 <100* 19
<br /> 12/6/2001 -- 1045 2334 -1289 12,000[8] - 5,100 <50 340 210 <50 1 1
<br /> 2/14/2002 - 1045 2174 -1129 13,000 -- 5100 110 410 250 29 13
<br /> 6/13/2002 -- 1045 2206 -11 61 10,000 - 2,400 87 300 240 24 08
<br /> 8/22/2002 1045 2305 -1260 13,000 - 5,100 160 430 330 31 1
<br /> 11/13/2002 - 1045 2403 -1358 <10,000 -- 2,200 <100 <100 <100 <100 --
<br /> 02/12/2003 P 1045 2316 -1271 - - -- - -- - - 198 Not Sampled
<br /> Report Date September 24,2004 Page 1 of 12
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