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TAW I i <br /> WELL CONCENTRATIONS <br /> Shell-branded Service Station <br /> 2575 Country Club Boulevard <br /> Stockton,California <br /> WIC#244-7524-3545 <br /> Sample Measured Corrected SP TPPH B T E X MTBE Methanol Comments <br /> GW Depth GW Elev <br /> Date (ft) (ft) (ft) (uglL) (ug/L) (uglL) (ug/L) (ug/L) (uglL) (ug/L) <br /> 30-Jul-96 966 -950 000 <1000 <10 <10 <10 <10 5100 NA <br /> 25-Oct-96 1079 -1063 000 <250 <2 5 <2 5 <2 5 <2 5 2400 NA MTBE by EPA Method 8260 3600 ppb <br /> 06-Feb-97 519 -503 000 <500 <5 0 <5 0 <5 0 <5 0 2500 NA <br /> 01-Apr-97 706 -690 000 <1000 <10 <10 <10 <10 1900 NA <br /> 08-Jul-97 855 -839 000 <200 <2 0 <2 0 <2 0 <2 0 510 NA <br /> VOCs by 8260 ND,Oxygenates by 8260 ND except for <br /> 02-Sep-97 964 NA 000 <250 <2 5 <2 5 <2 5 <2 5 610 <1000 MTBE 700 ppb <br /> Oxygenate Compounds by 8260 ND except for MTBE <br /> 02-Dec-97 915 -899 000 <50 <0 50 <0 50 <0 50 <0 50 540 <1000 720 ppb <br /> Oxygenate Compounds by 8260 ND except for MTBE <br /> 29-Jan-98 670 -654 000 <50 <0 50 <0 50 <0 50 <0 50 300 <1000 400 ppb <br /> Oxygenate Compounds by 8260 ND except for MTBE <br /> 23-Apr-98 534 -518 000 <100 <1 0 <1 0 <1 0 <1 0 400 <1000 350 ppb <br /> Oxygenate Compounds by 8260 ND except for MTBE <br /> 29-Jul-98 696 -680 000 <50 <0 50 <0 50 <0 50 <0 50 340 <1000 340 ppb <br /> MW-5 Top casing elevation (ft) 3 12 a <br /> 24-Jan-95 1467 -11 54 001 NA NA NA NA NA NA NA <br /> New top casing elevation (ft) 188 b <br /> 29-Mar-95 971 783 000 280000 6900 11000 1300 11000 NA NA <br /> 27-Jul-95 1203 -1009 008 NA NA NA NA NA NA NA <br /> 10-Oct-95 1368 -11 79 002 NA NA NA NA NA NA NA <br /> 22-Jan-96 1214 -1026 000 110000 12000 16000 1800 11000 NA NA <br /> 24-Apr-96 947 -757 003 NA NA NA NA NA NA NA <br /> 30-Jul-96 11 14 -926 000 10000 14000 17000 1400 8700 620000 NA <br /> 25-Oct-96 1208 -1020 000 <500000 18000 14000 <5000 6200 2200000 NA <br /> 06-Feb-97 788 -600 000 <100000 12000 12000 1600 10000 1100000 NA <br /> 02-Apr-97 924 -7 36 000 <200000 14000 14000 2000 11000 1300000 NA <br /> 08-Jul-97 1008 -820 000 <250000 17000 16000 <2500 8400 1600000 NA <br /> VOCs by 8260 ND except for Benzene 13000 ppb, <br /> 02-Sep-97 11 36 NA 000 <500000 9500 9100 <5000 6100 830000 600000 Oxygenates by 8260 ND except for MTBE 830000 ppb <br /> Oxygenate Compounds by 8260 ND except for MTBE <br /> 02-Dec-97 11 03 -915 000 <250000 14000 13000 <2500 9700 710000 540000 890000 ppb <br /> I <br /> 240.0781 1 <br />