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<br /> 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) (pg/L) (1rg1L) (pg/L) (pig/L) (Pg1L) (p91L) (mg1L) Comments
<br /> MW-3 2/14/2002 -- 958 2090 -1132 25,000 - 6,900 380 2,000 1,500 <100[10] 19
<br /> 6/13/2002 - 9 58 2109 -1151 22,000 - 5,400 63 1,800 750 <50[10] 08
<br /> 8/22/2002 -- 958 2213 -1255 24,000 -- 9,600 100 2,200 780 <25 09
<br /> 11/13/2002 -- 958 2300 -1342 <50,000 - 8,400 <500 1,500 <500 <500 --
<br /> 02/12/2003 - 958 - -- - - - - - -- - -- Not Sampled
<br /> 05/29/2003 P 958 2153 -1195 23 000 - 8,000 <50 1,900 430 <120 473
<br /> 08/04/2003 P 958 2216 -1258 22,000 R -- 8,100 <100 1,700 310 <100 329
<br /> 11/03/2003 P 958 2329 -1371 18,000 - 6,900 <50 1,700 350 <50 086
<br /> 02/09/2004 P 958 2317 -1359 17,000 -- 7,100 <120 1,100 300 <120 331
<br /> MW-4 2/16/1995 -- 1234 3925 f -2691 77,000 - 9,200 13 000 1,700 8 000 NA NA (58)
<br /> 5/17/1995 -- 1234 3465 -2231 89,000 -- 11,000 17,000 2 100 9,900 NA NA (58)
<br /> 8/15/1995 - 1234 3430 -2196 74,000 - 6,400 10,000 1,600 7,600 NA NA (59)
<br /> 11/29/1995 - 1234 3442 -2208 92,000 -- 7 800 1200 1,700 7,600 NA NA (59)
<br /> 2/27/1996 - 1234 3167 -1933 61,000 -- 7,600 8,500 1,600 6,600 NA NA
<br /> 5/15/1996 -- 1234 3009 -1775 64,000 - 8,100 8,600 1 600 6,400 <500*[1] NA (58)
<br /> 8/22/1996 -- 1234 3072 -1838 79,000 - 9200 11 000 1,800 7,400 <700**[1] NA
<br /> 11/25/1996 - 1234 3078 -1844 72,000 -- 8,800 9,300 1,600 6,100 <500*[1] NA
<br /> 2/24/1997 -- 1234 2682 -1448 40,000 -- 6,700 2,200 900 2,600 <600**[1] NA
<br /> 5/19/1997 -- 1234 2667 -1433 1 57 000 -- 8,700 6 700 1,300 5,000 <60011] NA
<br /> 8/21/1997 - 1234 2774 -1540 48,000 -- 7,200 5,000 1,200 3,900 <1,000*"[1] NA (38)
<br /> 19117!1997 - 1234 2879 -1645 12 000 - 4,800 180 370 280 58 NA (59)
<br /> 2/9/1998 -- 1234 2627 -1393 17,000 -- 5,200 540 690 730 <500"*[1] NA (59)
<br /> 5/22/1998 - 1234 2221 -987 16,700 - 5,360 611 663 715 <100 NA (58)
<br /> 8/12/1998 - 1234 2234 -10 00 19,300 - 5,880 890 678 911 <20 NA (58)
<br /> 11/9/1998 -- 1234 2342 -1108 23,600 - 6,340 720 692 875 459 NA (58)
<br /> 2/17/1999 1234 2265 -1031 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 4200 1,260 3,610 572 NA (58)
<br /> 12/17/1999 - 1 1234 2398 -11 64 14,700 1 -- 5,030 859 538 291 586 NA (58),[2]
<br /> 2/2212000 - 1234 2326 -1092 1,810 -- 477 208 73 6 182 622 NA (58)
<br /> 6/22/2000 - 1234 2197 -963 12,000 -- 4200 352 294 224 488 NA (59)
<br /> 8/30/2000 - 1234 2299 -1065 27,200 - 8,180 687 748 1,170 90 NA
<br /> 11/2112000 -- 1234 2369 -11 35 13 200[4] -- 4,540 <50 438 306 576 NA
<br /> Report Date April 21, 2004 Page 5 of 12
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