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OBLE 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 I SP TPPH I B T E X MTBE Methanol Comments <br /> GW Depth I GW Elev ! I i <br /> Date (ft) (ft) j (ft) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) ' (ug/L) (ug/L) <br /> MW-1 ITop casing elevation (ft) 2 20 a I ' <br /> 24-Jan-95 1366 1 -11 46 1 000 NA I NA NA NA NA NA NA <br /> 1 New top casing elevation (ft) 071 b <br /> 29-Mar-95 853 -782 1 0 00 900000 I 8800 13000 i 2800 18000 NA NA I Decommissioned 5/95 <br /> MW-1 (DUP) <br /> 29-Mar-95 NA I NA NA 400000 8700 11000 1200 8600 i NA NA <br /> MW-2 Top casing elevation (ft) 1 03 b i <br /> 24-Jan-95 1282 I -1179 i 000 1100 250 34 23 18 NA NA <br /> 29-Mar-95 1038 -935 1 000 9000 810 530 81 1 370 1 NA 1 NA <br /> 27-Jul-95 11 09 -1006 ; 000 1600 I 760 14 I 25 40 NA NA I <br /> 10-Oct-95 1276 -11 73 0 00 2200 530 11 24 32 I NA NA <br /> 22-Jan-96 1124 ; -1021 000 4700 1100 16 20 57 NA 1 NA <br /> 24-Apr-96 1 858 -755 000 370 1 23 30 17 39 92 NA <br /> 30-Jul-96 1 1031 -928 000 1500 1 320 18 72 22 69 NA <br /> 25-00-96 11 42 i -1039 000 3900 840 1 <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 1 947 i -844 I 000 1 150 32 <0 50 1 <0 50 <0 50 20 NA <br /> 1 I 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 000 220 82 43 1 <1 2 27 67 <1000 8260 ND except for MTBE 42 ppb <br /> 1 I , Oxygenate Compounds by 8260 NO except for MTBE <br /> 02-Dec 97 1010 -907 000 230 17 14 25 13 170 <1000 830 ppb <br /> i Oxygenate Compounds by 8260 ND except for MTBE <br /> 29-Jan-98 791 -688 000 51 I 083 <0 50 <0 50 <0 50 98 <1000 7 3 ppb <br /> I Oxygenate Compounds by 8260 ND except for MTBE <br /> 23-Apr-9B 676 -573 000 1 <50 <Q 50 <0 50 <0 50 <0 50 <2 5 <1000 3 1 ppb <br /> i Oxygenate Compounds by 8260 ND except for MTBE <br /> 29-Jul-98 I 797 -694 000 1 <50 1 3 <0 50 <0 50 <0 50 41 <1000 3 B ppb <br /> Oxygenate Compounds by 8260 ND except for MTBE <br /> 06-Oct-98 861 -758 000 <50 <0 50 <0 50 I <0 50 <0 50 55 <1000 61 ppb <br /> 2400781 1 <br />