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TAlk I <br /> WELL CONCENTRATIONS <br /> Shell-branded Service Station <br /> 2575 Country Club Boulevard <br /> Stockton,California <br /> WIC#204-7524-3505 <br /> Sample Measured Corrected SP TPPH B T E X MTBE Methanol Comments <br /> CW Depth GW Elev <br /> Date (ft) (ft) (ft) (ug/L) (ug/L) (ug/L) (ug/L) (uglL) (ug/L) (ug/L) <br /> MW-1 Top casing elevation (ft) 2 20 a <br /> 24-Jan-95 1366 -1146 000 NA NA NA NA NA NA NA <br /> New top casing elevation (ft) 0 71 b <br /> 29-Mar-95 853 -782 000 900000 8800 13000 2800 18000 NA NA Decommissioned 5195 <br /> MW-1 (DUP) <br /> 29-Mar-95 NA NA NA 400000 8700 11000 1200 8600 NA NA <br /> MW-2 Top casing elevation (ft) 103 b <br /> 24-Jan-95 1282 -1179 000 1100 250 34 23 18 NA NA <br /> 29-Mar-95 1038 -935 000 9000 810 530 81 370 NA NA <br /> 27-Jul-95 1109 -1006 000 1600 760 14 25 40 NA NA <br /> 10-Oct-95 1276 -1173 000 2200 530 11 24 32 NA NA <br /> 22-Jan-96 1124 -1021 000 4700 1100 16 20 57 NA NA <br /> 24-Apr-96 858 -755 000 370 23 30 17 39 92 NA <br /> 30-Jul-96 1031 -928 000 1500 320 18 72 22 69 NA <br /> 25-Oct-96 1142 -1039 000 3900 840 <25 <25 43 <125 NA <br /> 06-Feb-97 656 -553 000 420 <0 50 <0 50 <0 50 063 20 NA <br /> 02-Apr-97 846 -743 000 240 92 69 <1 2 51 880 NA <br /> 08-Jul-97 947 -844 000 150 32 <0 50 <0 50 <0 50 20 NA <br /> VOCs by 8260 ND except for Benzene 4 5 ppb, <br /> Toluene 5 3 ppb,Xylenes 4 5 ppb Oxygenates by <br /> 02-Sep-97 1057 NA Goo 220 82 43 <1 2 27 67 <1000 8260 ND except for MTBE 42 ppb <br /> Oxygenate Compounds by 8260 ND except for MTBE <br /> 02-Dec-97 1010 -907 000 230 17 14 25 13 170 <1000 830 ppb <br /> Oxygenate Compounds by 8260 ND except for MTBE <br /> 29-Jan-98 791 -688 000 51 083 <0 50 <0 50 <0 50 98 <1000 7 3 ppb <br /> Oxygenate Compounds by 8260 ND except for MTBE <br /> 23-Apr-98 676 -573 000 <50 <0 50 <0 50 <0 50 <0 50 <2 5 <1000 3 1 ppb <br /> Oxygenate Compounds by 8260 ND except for MTBE <br /> 29-Jul-98 797 -694 000 <50 1 3 <0 50 <0 50 <0 50 41 <1000 3 8 ppb <br /> 2400783 1 <br />