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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 /> TQC Depth to Water Level Ethyl- Total
<br /> Well Date P1 Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO
<br /> Number Sampled NP (feet msl) (fest bgs) (feet msl} (EfgIL} (pg/L) (Frg1L) (1rg1L) (frg1L) (Irg1L) (lrg1L) (mg
<br /> lL} 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 - 10 45 32 61 -22 16 38 000 - 12,000 790 1,100 3,400 NA NA (53)
<br /> 8/15/1995 - 10 45 3213 -21 68 45,000 - 10,000 330 1,000 3,300 NA NA (54)
<br /> 19/29/1995 10 45 32 32 -21 87 46,000 - 9,800 370 1,100 2 900 NA NA (54)
<br /> 2/27/1996 -- 10 45 - - - - - - - - -- - Well Inaccessible
<br /> 5/15/1996 - 10 45 27 88 -17 43 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 - 10 45 28 71 -18 26 37,000 - 7,900 460 870 1,500 <500*[1] NA
<br /> 2/24/1997 - 10 45 24 66 -14 21 37,000 8,300 740 900 2,200 <500*[1] NA
<br /> 5!191997 - 10 45 24 54 -14 09 30,000 - 8,200 310 780 1,100 <600111 NA
<br /> 1
<br /> 8/21/1997 -- --j-0 45 2562 -1517 28,000 -- 8,200 380 860 1,100 <2,000**[1] NA (54)
<br /> 11117/1997 -- 1045 26 67 -1622 23,000 - 9,300 580 820 1,300 <1 000**[1] NA (54)---
<br /> 219/1998
<br /> 54)2/9/1998 -- 1045 2409 -1364 20,000 - 6,800 360 700 1,100 <1,000**[1] NA (54)
<br /> 5/22/1998 -- 10 45 20 08 -9 63 20,700 - 6,650 413 588 1 030 <100 NA (53)
<br /> 8/12/1998 - 10 45 20 26 -9 81 22 000 -- 8,690 510 785 1,220 <2 NA (53)
<br /> 11/9/1998 - 1045 21 40 -1095 21,300 - 7,420 289 628 1,020 242 NA (53)
<br /> 2/17/1999 - 10 45 2060 -1015 2,650 - 834 483 902 138 238 NA (53)
<br /> 5/25/1999 - 10 45 19 96 -9 51 22,600 - 8,410 291 854 1,160 308 NA (53)
<br /> 8/18/1999 - 10 45 21 95 -11 50 19,400 - 7,860 228 670 958 116 NA (53)
<br /> 12/17/1999 1045 21 90 -1145 15,900 - 5,630 121 379 579 34 4 NA (53),[2]
<br /> 2/22/2000 -- 1045 21 13 -1068 19,700 - 8,830 228 800 932 19 3 NA (53)
<br /> 6/22/2000 - 1045 1989 -944 19 900 - 6,020 139 401 486 13 2 NA (54)
<br /> 8/30/2000 -- 1045 20 92 -1047 18,300 -- 8,600 254 654 650 228 NA
<br /> 11/21/2000 - 1045 2160 -1115 6,620[4] - 1,570 703 908 199 128 NA
<br /> 2/15/2001 -- 1045 2167 -1122 11,300[7] - 3,490 136 450 329 226 1
<br /> 5/17/2001 - 10 45 20 90 -1045 8,630[5] - 3,190 <50 197 137 243 07
<br /> 8/1612001 1045 22 27 -11 82 13 000 - 4,400 130 440 30D <100* 1 9
<br /> 12/6/2001 - 10 45 23 34 -12 89 12,000(8] - 5,100 <50 340 210 <50 1 1
<br /> 2/14/2002 - 10 45 21 74 -11 29 13,000 - 5,100 110 410 250 29 1 3
<br /> 6/13/2002 10 45 2206 -1161 10,000 - 2,400 87 300 240 24 0 8
<br /> 8122!2002 -- 10 45 23 OS -12 60 13,000 - 5,100 160 430 330 31 1
<br /> 11113/2002-- -1045 24 03 -1358 <10,000 - 2,200 <1D0 <1D0 <100 <100
<br /> 02/12/2003 P 1045 2316 -1271 -- - - - - - - 1 98 Not Sampled
<br /> I
<br /> Page 1 of 12
<br /> Report Date July 13,2004
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