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A 1 9 <br /> 1 <br /> HISTORICAL GROUNDWATER MONITORING DATA <br /> Former ARCO Service Station No 2168 <br /> 441 Charter Way <br /> Stockton California <br /> Elevation <br /> 'lop of Static Water Water Depth to Ethyl- Total Dissolved <br /> Well 1D Casing(feet Level Elevation Screen TPHG Benzene Toluene benzene Xylenes MtBE Oxygen <br /> &Sample Date msl) (feetbgs) (feetmsl) (feet bgs) ug/L ug/L ug/L ug/L ug/L ug/L (ppm) <br /> MW 7 47 8/21/1997 2389 -1501 19 000 1,100 2,600 490 2,000 <500**[1] NA <br /> (cont) 48 11/17/1997 2491 1603 2 300 120 190 20 100 <50[l] NA <br /> 47 2/9/1998 2221 -1333 21000 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 l8 57 969 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 10400 661 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 99 149 399 <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 /> 11121/2000 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 /> 0511701 1922 -1034 2 320[5] 207 119 407 991 <10 08 <br /> 8/16/2001 2059 1171 2200 30 14 49 95 <2 06 <br /> 12/6/2001 2163 -1275 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 /> 8/22/2002 2138 1250 1,400 11 <5 0 15 10 <0 50 09 <br /> 1013/2002 2233 -1345 1,400 40 <10 18 34 <10 - <br /> MW 8 8/30/2000 935 1885 950 150 115 <2 <2 <2 <2 <2 NA <br /> 11/21/2000 1930 -995 <50 <0 5 <0 5 <0 5 <0 5 <2 NA <br /> 2/15/2001 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 /> 8/16/2001 2012 -1077 <50 <0 5 <0 5 <0 5 <0 5 <2 09 <br /> 12/6/2001 1829 -894 <50 <0 50 <0 50 <0 50 <0 50 <0 50 16 <br /> 2/14/2002 1927 -992 <50 <0 50 <0 50 <0 50 <0 50 <0 50 31 <br /> 6/13/2002 1973 1038 <50 <0 50 <0 50 <0 50 <0 50 <0 50 12 <br /> 8/22/2002 2078 1143 76 23 052 56 44 <0 50 18 <br /> 11/13/2002 2085 -1150 <50 <0 50 <0 50 <0 50 <0 50 <0 50 -- <br /> MW-8B 8/30/2000 961 2027 -1066 750 1,130 425 496 106 108 <2 NA <br /> 11/2112000 2089 -1127 924[4] 241 234 525 109 <2 NA <br /> 2/15/2001 2088 -1127 811 [7] 159 298 490 492 <2 13 <br /> 5/17/2001 2024 1063 137[5] 504 132 947 43 <2 25 <br /> IcV5 BP ARC01021681Quarterly12168 GWMR4Q02 <br /> 7of9 <br />