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TAO 1 <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 1D Casing(feet Level Elevation Screen TPHG Benzene Toluene benzene Xylenes MtBE Oxygen <br /> &Sample Date msi) (feet bgs) (feet msl) (feet bgs) ug/L ug/L ug/L ug/L ug/L ug/L (ppm) <br /> MW-8B 8/16/2001 2164 1203 63 12 079 76 42 <2 18 <br /> (cont..) 12/6/2001 22S8 1297 94[81 40 <0 50 55 17 <0 50 1 1 <br /> 2/14/2002 2106 -1145 <50 49 <0 50 <0 50 <0 50 11 16 <br /> 6/13/2002 2134 -1173 <50 12[11] <0 50 1 3[11] 1 5[111 <0 50 33 <br /> 8/22!2002 2243 -1282 <50 <0 50 <0 50 <0 50 <0 50 <0 50 32 <br /> 11/13/2002 2356 -1421 <50 <0 50 <0 50 <0 50 <0 50 <0 50 -- <br /> MW-8C 8/30/2000 901 2121 -1220 1050 685 156 676 218 759 <2 NA <br /> 11/21/2000 1919 10 18 <50 0 692 <0 5 <0 5 <0 5 <2 NA <br /> 2/15/2001 2055 1154 <50 194 173 <50 194 <2 20 <br /> 05/17/01 1995 1094 <50 0 861 <0 5 <0 5 <0 5 <2 20 <br /> 8/16/2001 2141 1240 <50 071 <0 5 <0 5 <0 5 <2 44 <br /> 12/6/2001 2229 1327 150 47 12 12 45 <0 50 13 <br /> 2/14/2002 2064 1163 <500[9] 120[9] <5 0[9] 18[9] <5 0[9] 13 1 8 <br /> 6/13/2002 21 10 -1209 <50 7 <0 50 <0 50 062 054 1 8 <br /> 8/22/2002 2213 -13 12 <50 056 <0 50 <0 50 <0 50 062 36 <br /> 11/13/2002 2303 -1368 <50 066 <0 50 <0 50 <0 50 072 -- <br /> I <br /> k V5 BP ARC01021681Qvarterly12168 GWMR4Q02 <br /> 8 of 9 <br />