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TABLE 1
<br /> Groundwater Monitoring and Analytical Data
<br /> Former ARCO Service Station No 2168
<br /> 441 Charter Way
<br /> Stockton, California
<br /> Elevation
<br /> Top of Static Groundwater Depth to Ethyl- Total Dissolved
<br /> Well ID Casing Water Level Elevation Screen TPHG Benzene Toluene benzene Xylenes MtBE Oxygen
<br /> &Sample Date (feet msl) (feet bgs) (feet msl) (feet bgs) ug/L ug/L ug/L ug/L ug/L ug/L (mg1L)
<br /> MW-8 42 11/9/1998 1973 -1080 15,900 1,080 315 267 1,240 <2 NA
<br /> (cont) 45 2/17/1999 1879 -986 53,500 9,870 2,720 1,540 8,320 <2 NA
<br /> 45 5/25/1999 1812 -919 43,900 7,020 1,880 1,520 8,290 <2 NA
<br /> 45 8/18/1999 1926 -1033 40,900 6,260 1,590 1,470 7,460 478 NA
<br /> 45 12117199[2] 2008 -11 15 4,080 536 149 122 756 <2 NA
<br /> 45 2/22/2000 1929 -1036 38,200 8,430 1,800 1,330 6,390 <2 NA
<br /> 48 6122!2000 1815 -922 2,150 <2 5 15 14 <2 NA
<br /> 8/30/2000 1912 -1019 37,900 5,290 1,260 1,280 5,570 <2 NA
<br /> 11/21/2000 1983 -1090 30,100[5] 5,120 1,080 1,150 5,150 <2 NA
<br /> 2/15/2001 1972 -1079 58,200[6] 5,930 1,400 1,540 5,820 <2 1 1
<br /> 5/17/2001 1911 -1018 31,700[5] 5,210 1,090 1,300 5,020 <40 09
<br /> 8/16/2001 2050 -11 57 39,000 5,000 1,300 1,600 5,500 <50* 07
<br /> 12!6/2001 21 50 -1257 28,000 5,800 <100 1,300 4,800 <100* 06
<br /> 2/14/2002 1980 -1087 32,000 4,100 1,100 1,400 4,800 <50[l0] 08
<br /> 6/13/2002 2020 -1127 34,000 3,600 1,100 1,300 4,000 <25[l0] 09
<br /> 8/22/2002 2123 -1230 27,000 5,000 950 1,100 4,500 <25 1 1
<br /> 11/13/2002 2223 -1330 37,000 5,000 900 1,400 4,600 <100 --
<br /> 2/12/2003 2248 -1355 31,000 4,200 900 1,200 5,700 <50 1 0
<br /> 5/29/2003 2058 -1165 26,000 4,000 1,000 1,100 5,200 <120 47
<br /> MW-7 2/16/1995 Well Inaccessible
<br /> 5/17/1995 888 3050 -21 62 300 40,000 2,300 8,200 820 4,800 NA NA
<br /> 48 8/15/1995 3041 -21 53 30,000 1,400 4,400 490 2,800 NA NA
<br /> 48 11/29/1995 3056 -21 68 45,000 2,100 6,400 800 3,600 NA NA
<br /> 2/27/1996 2775 -1887 40,000 2,700 7,800 740 4,000 NA NA
<br /> 48 5/15/1996 2613 -1725 38,000 2,500 7,300 790 4,100 <500*[1] NA
<br /> 8/22/1996 2667 -1779 52,000 4,400 9,900 790 4,600 <500*[1] NA
<br /> 11/25/1996 2687 -1799 52,000 3,500 9,100 810 4,700 <600**[1] NA
<br /> 2/24/1997 2289 -1401 25,000 1,300 3,700 500 2,200 <700**[1] NA
<br /> 5/19/1997 2277 -1389 19,000 970 2,800 390 1,700 <300*[i] NA
<br /> 47 8/21/1997 2389 -1501 19,000 1,100 2,600 490 2,000 <500**(i] NA
<br /> 48 11/17/1997 2491 -1603 2,300 120 190 20 100 <50[1] NA
<br /> 47 2/9/1998 2221 -1333 21,000 1,100 2,800 660 2,700 4,400[1] NA
<br /> 47 5/22/1998 1836 -948 9,580 593 919 282 942 <100 NA
<br /> 47 8/12/1998 1857 -969 5,590 289 460 197 628 <2 NA
<br /> 47 11/911998 1968 -1080 4,970 406 612 119 520 <2 NA 1
<br /> K 1WprocessV5 BP ARC01021581Quar1eily\2 QTR 03\2158 QWMR 2003
<br /> 7 of 10
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