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<br /> HISTORICAL GROUNDWATER MONITORING DATA
<br /> Former ARCO Service Station No 2168
<br /> 441 Charter Way
<br /> Stockton,California
<br /> Elevation
<br /> Top of Static Water Water Depth to Ethyl- Total Dissolved
<br /> Well ID Casing(feet Level Elevation Screen TPHG Benzene Toluene benzene Xylenes MtBE Oxygen
<br /> &Sample Date msl) (feet bgs) (feet=1) (feet bgs) ug/L ug/L ug/L ug/L ug/L ug/L (ppm)
<br /> MW 7 48 8/15/1995 3041 -2153 30,000 1,400 4,400 490 2,800 NA NA
<br /> (cont) 48 11/29/1995 3056 -2168 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#f l] NA
<br /> 8/22/1996 2667 -1779 52,000 4,400 9,900 790 4,600 <500*[1] NA
<br /> 11/25/1996 2697 -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 -1399 19,000 970 2,800 390 1,700 <300*[1] NA
<br /> 47 8/21/1997 23 89 1501 19 000 1 100 2,600 490 2000 <500**[1] NA
<br /> 48 11/17/1997 2491 1603 2 300 120 190 20 100 <50[l] 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 5,690 289 460 197 628 <2 NA
<br /> 47 11/9/1998 1968 -1080 4,970 406 612 119 520 <2 NA
<br /> 47 2/17/1999 1890 -1002 42,300 3 650 8,230 942 5,030 <2 NA
<br /> 35 5/25/1999 1831 -943 9,910 944 1,910 287 1,550 <2 NA
<br /> 47 8/18/1999 1939 -1050 10,400 681 1,040 331 1,500 <2 NA
<br /> 47 12117/99[2] 2030 -1142 1,790 833 269 966 808 <2 NA
<br /> 47 2/22/2000 1936 -1048 2,240 159 98 149 399 <2 NA
<br /> 41 2/22/2000 1799 -911 33 900 6,560 1,130 1,090 4 610 <2 NA
<br /> 8/30/2000 1926 -1038 1,590 22 195 49 102 <2 NA
<br /> 11/21/2000 1996 -1108 2,260�6] 106 768 542 216 <2 NA
<br /> 2/15/2001 1997 -1109 18,400[7] 1,400 2,530 656 2,420 <2 12
<br /> 05/1701 1922 -1034 2 320[5] 207 119 407 991 <10 09
<br /> 8/16/2001 2059 -1171 2200 30 14 49 95 <2 06
<br /> 12/62001 2163 -127S 6,800 580 270 210 930 <5 0* 09
<br /> 2/14/2002 2003 -11 15 62[8] <0 50 <0 50 053 <0 50 <0 50 24
<br /> 6/13/2002 2035 -1147 1,400[8] 29 40 12 13 <0 50 14
<br /> 822/2002 2138 -1250 1,400 11 <5 0 15 10 <0 50 09
<br /> 11/13/2002 2233 -1345 1,400 40 <10 18 34 <10 --
<br /> 2112l2003 2316 -1428 820 <5 0 <5 0 <5 0 <5 0 <5 0 20
<br /> MW-8 8/30/2000 935 1885 -950 150 115 <2 <2 <2 <2 <2. NA
<br /> 11121/2000 1930 -995 <50 <0 5 <0 5 <0 5 <0 5 <2 NA
<br /> 2/152001 1883 948 <50 <0 5 <0 5 <0 5 <0 5 <2 12
<br /> 5/17/2001 1890 -955 <50 <0 5 <0 5 <0 5 <0 5 <2 26
<br /> 8/162001 2012 1077 <50 <0 5 <0 5 <0 5 <0 5 <2 09
<br /> 12/6/2001 1929 -994 <50 <0 50 <0 50 <0 50 <0 50 <0 50 16
<br /> K V5 BP ARC010216KQuarteJyll QTR 0312168 GWMR 1Q03
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