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Table 1 J
<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 PI Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO
<br /> Number Sampled NP (feet msl) (feet bgs) (feet msl) (pg1L) (p91L.) (Fg1L) (pg1L) (pg1L) (pg1L) W91L) (mg/L) Comments
<br /> MW-4 5/22/1998 - 1234 2221 -987 16,700 - 5,360 611 663 715 <100 NA (58)
<br /> 8/12/1998 - 12 34 2234 -1000 19,300 -- 5,880 890 678 911 <20 NA (58)
<br /> 11!911998 - 1234 2342 -1108 23,600 - 6,340 720 692 875 459 NA (58)
<br />! 2/17/1999 -- 1234 2265 -10 31 21,300 - 6,970 950 907 1,030 666 NA (58)
<br /> 5/25/1999 - 1234 2202 -968 53,700 - 9,870 4,870 <100 4,600 646 NA (58)
<br /> 8/18/1999 -- 1234 2309 -1075 34,400 - 7,390 4,200 1,260 3,610 572 NA (58)
<br /> 12!1711999 - 1234 2398 -1164 14,700 -- 5,030 859 538 291 586 NA (58),[21
<br /> 2/22/2000 - 1234 2326 -1092 1,810 - 477 208 736 182 622 NA (58)
<br /> 6/22/2000 - 1234 2197 -963 12,000 _ 4,200 352 294 224 488 NA (59)
<br /> 8/30/2000 -- 1234 22 99 -1065 27,200 -- 8,180 687 748 1,170 90 NA
<br /> 11/21/2000 - 1234 2369 -1135 13,200[4] - 4,540 <50 438 306 57 6 NA
<br /> 2/15/2001 - 1234 2378 -1144 24,800[6] - 6,200 188 790 566 552 1
<br /> 5/17/2001 - 1234 2301 -1067 16,600[51 - 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 - 12 34 2545 -1311 <50 000 -- 6,200 <500 800 660 <500* 1
<br /> 2/14/2002 - 1234 2389 -1155 20,000 -- 5,800 200 1,100 890 <100[101 1
<br /> 6/13/2002 - 1234 2415 -1181 21 000 - 4,400 170 860 790 <50[101 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 /> 02/12/2003 P 1234 2601 -1367 <50 - 14 <050 1 0 <050 <0 50 207
<br /> 05/29/2003 P 1234 2481 -1247 14,000 - 4,400 <25 490 120 <120 431
<br /> 08/04/2003 P 1234 2521 -1287 20,000 R - 7,100 <100 810 140 <100 171
<br /> 11/03/2003 P 12 34 2596 -1362 <50 R - <25 R <25 R <25 R <25 R <2 5 R 1 11
<br /> 02109/2004 P 12 34 2562 -1328 11,000 - 4,100 <50 180 110 80 144
<br /> 05/10/2004 P 1234 2520 -1286 4 800 - 910 <50 <50 <50 <50 101
<br /> 0810912004 P 1234 2645 •1411 28,000 -- 8,200 160 1,200 630 100 12
<br /> MW-5 2/16/1995 - 928 3578 -2650 180,000 - 8,500 15,000 2200 12,000 NA NA (39)
<br /> 5/17/1995 - 928 31 23 -2195 22,000 -- 3,400 2,100 390 2,400 NA NA (55)
<br /> 8/15/1995 -- 928 3083 -2155 32,000 - 4,200 3,500 410 2,500 NA NA (55)
<br /> 11/2911995 - 928 31 00 .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 1,800 NA NA
<br /> 5/15/1996 - 928 2666 -1738 43,000 - 6,500 5 000 790 3,400 1 <500*[1] 1 NA (55)
<br /> 8/22/1996 - 928 2714 1 -1786. 58,000 -- 8,700 8,200 880 4,500 <500*[1] NA
<br /> Report Date September 24,2004 Page 6 of 12
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