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TA411 <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 MCBE Oxygen <br /> &Sample Date msl) (feet bgs) (feet incl) (feet bgs) ug/L ug/L ug/L ug/L ug/L ug/L (ppm) <br /> MW-1B 2/14/2002 2171 1145 <50 59 068 <0 50 076 <0 50 17 <br /> (cont) 6/13/2002 2206 1180 <50 3 6[l t] <0 50 <0 50 0 60(11] <0 50 13 <br /> 8/22/2002 2314 -1288 <50 28 <0 50 <0 50 052 <0 50 11 <br /> 11/13/2002 2400 1374 <50 70 <0 50 <0 50 <0 50 <0 50 - <br /> MW-1C 8/30/2000 1021 2219 -1198 1050 537 63 <2 <2 406 <2 NA <br /> 11/2112000 2169 -1148 62 3[4] 569 121 0 999 351 <2 NA <br /> 2/152001 2180 -1159 <50 988 142 164 259 <2 08 <br /> 5/17/2001 2123 1102 <50 909 0 708 157 its <2 1 1 <br /> 8/16/2001 2266 1245 <50 42 065 <0 5 093 <2 24 <br /> 12/62001 2357 1336 <50 93 <0 50 14 072 <0 50 13 <br /> 2/142002 2217 -1196 <50 10 059 18 17 <0 50 18 <br /> 6/132002 2241 -1220 4 8[11] <0 50 0 9[11] 0 66[11] <0 50 <0 50 13 <br /> 8222002 2329 -1308 <50 40 <0 50 1 1 099 <0 50 13 <br /> 11/13/2002 2438 -1417 <50 <0 50 <0 50 <0 50 <0 50 <0 50 -- <br /> MW-2 53 2/16/1995 1093 3748 -2665 330 36,000 6,300 4,600 610 2,700 NA NA <br /> 5/17/1995 Well Inaccessible <br /> 53 8/15/1995 3245 2162 20,000 3,500 2,000 280 1,300 NA NA <br /> 53 1129/1995 3262 2179 30 000 3,800 2,700 380 1,800 NA NA <br /> 227/1996 2987 -1904 Well not sampled <br /> 53 5/15/1996 28 16 -1733 16,000 2 600 1 000 210 910 <200**(1] NA <br /> 53 822/1996 2876 -1793 34 000 5,900 2,500 560 2,300 <300**(I] NA <br /> 1125/1996 2895 48 12 26,000 4 000 2,000 390 1 800 <300*(1] NA <br /> 224/1997 2495 -1412 22,000 3100 1,300 340 1400 <500**[1] NA <br /> 5/19/1997 2494 1401 28,000 4,700 1,900 480 2,200 <300*[1] NA <br /> 52 821/1997 2592 1509 15,000 3 000 1,200 320 1,200 <500**[1] NA <br /> 53 11/17/1997 2694 1611 2,200 510 120 44 130 <100**(1] NA <br /> 53 2!9/1998 2433 1350 15,000 3 700 790 440 1,000 <500**[1] NA <br /> 52 521/1998 2038 955 10 200 2,220 562 238 628 <100 NA <br /> 52 8/12/1998 2057 -974 1,100 234 390 23 8 494 <2 NA <br /> 52 11/9/1998 2167 1084 4 420 1,050 212 116 278 <2 NA <br /> 52 2/17/1999 2098 1015 8,450 1,790 332 266 499 <2 NA <br /> 52 525/1999 2028 945 1,720 469 479 578 764 <2 NA <br /> 52 8/16/1999 2140 -1057 8 870 2,610 176 316 411 <2 NA <br /> 52 12/17199[2] 2224 -1141 1,090 309 796 128 5 <2 NA <br /> 52 2/222000 2137 -1054 4 510 1500 138 151 207 <2 NA <br /> 53 6222000 2019 -936 735 141 17 12 22 <2 NA <br /> 8/302000 2239 1156 8200 2,310 204 259 322 <2 NA <br /> k VS BP ARC01021681Quartrr1y\2168 OWMR4Q02 <br /> 2of9 <br />