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<br /> TAB01
<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 nisl) (feet bgs) (feet msl) (feet bgs) µg/l- ug/L µg/L pg/L µg/L µg/L (ppm) Observations
<br /> MW-7 2/16195 Well Inaccessible
<br /> 5/17/95 888 3050 -21 62 300 40,000 2,300 8,200 820 4,800 NA NA No FP,No S,O=NE
<br /> 48 8/15/95 8 88 3041 -2153 30,000 1,400 4,400 490 2,800 NA NA No FP,No S,Yes 0
<br /> 48 11/29/95 8 88 3056 -21 68 45,000 2,100 6,400 800 3,600 NA NA No FP,No S,Yes O
<br /> 2/27/96 888 2775 -18 87 40,000 2,700 7,800 740 4,000 NA NA No FP,No S,Yes 0
<br /> 48 5/15/96 888 26 13 -1725 38,000 2,500 7,300 790 4,100 600*[I] NA No FP,No S,Yes 0
<br /> 8/22/96 888 2667 -1779 52,000 4,400 9,900 790 4,600 <500*[1] NA No FP,No S,Yes 0
<br /> 11/25/96 888 2687 -1799 52,000 3,500 9,100 810 4,700 <600**[1] NA No FP,No S,Yes 0
<br /> 2/24/97 888 2289 -1401 25,000 1,300 3,700 500 2,200 <700**[1] NA No FP,No S,Yes O
<br /> 5/19/97 8 88 2277 -13 89 19,000 970 2,800 390 1,700 <300*[1] NA No FP,No S,Yes 0
<br /> 47 8/21/97 8 88 23 89 -15 01 19,000 1,100 2,600 490 2,000 <500**[I] NA No FP,No S,Yes O
<br /> 48 11/17/97 8 88 2491 -1603 2,300 120 190 20 100 <50[1] NA No FP,No S,No O
<br /> 47 2/9/98 8 88 2221 -1333 21,000 1,100 2,800 660 2,700 4,400[1] NA No rP,No S,Yes 0
<br /> 47 5/22/98 888 18 36 -948 9,580 593 919 282 942 <100 NA No FP,No S,Yes 0
<br /> 47 8/12/98 888 18 57 -969 5,690 289 460 197 628 <2 NA No FP,No S,Yes 0
<br /> 47 11/9/98 8 88 1968 -1080 4,970 406 612 119 520 <2 NA No FP,No S,Yes 0
<br /> 47 2/17/99 8 88 1890 -1002 42,300 3,650 8,230 942 5,030 <2 NA No FP,No S,Yes 0
<br /> 35 5/25/99 889 1831 -943 9,910 944 1,910 287 1,550 <2 NA No FP,No S,Yes 0
<br /> 47 8/18/99 8 88 1938 -1050 10,400 681 1,040 331 1,500 <2 NA No FP,No S,Yes 0
<br /> 47 12/17/99[2] 8 88 2030 -t 1 42 1,790 833 269 966 808 <2 NA No FP,No S,O=NE
<br /> 47 2/22/00 8 88 1936 -1048 2,240 159 98 149 399 <2 NA No FP,No S,Yes 0
<br /> 41 2/22/00 8 88 1799 -911 33,900 6,560 1,130 1,090 4,610 <2 NA No FP,No S,Yes 0
<br /> 8/30/00 8 88 1926 -1038 1,590 22 195 49 102 <2 NA No FP,No S,Yes O
<br /> 11/21/00 8 88 1996 -1108 2,260[61 106 76 8 542 216 <2 NA No FP,No S,Yes 0
<br /> 2/15/01 8 88 1997 -1109 18,400[7] 1,400 2,530 656 2,420 <2 1 2 No FP,No S,O=NE
<br /> 05/1701 8 88 1922 -1034 2,320[5] 207 1 l 9 407 99 l <10 08 No FP,No S,Yes 0
<br /> 8/16/01 888 2059 -1171 2,200 30 14 49 95 <2 06 No FP,No S,Yes 0
<br /> Arr o2168 QUART LRLY DATA XLS
<br /> 7 of 8 Delta
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