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OBLE 1 <br /> WELL CONCENTRATIONS <br /> Shell Oil Products Company <br /> 2575 Country Clap Boulevard <br /> Stockton,California <br /> WIC#204-7524-3505 <br /> Sample Measured CorrectedPS <br /> TPPH ` B T E X MTBE I Methanol I Comments <br /> GW Depth GW Elev <br /> Date (ft) (ft) (ug/L) (ug/L) (ug/L) (ug/L) ! (ug/L) I (ug/L) I (ug/L) <br /> 01-Apr-97 1 706 1 -690 1 000 1 <1000 <10 <10 <10 <10 ! 1900 NA <br /> 08-Jul-97 1 855 1 -839 000 1 <200 <2 0 <20 <2 0 <20 510 NA 1 <br /> I VOCs by 8260 ND,Oxygenates by 8260 ND except for <br /> 02-Sep-97 964 1 NA 000 <250 <2 5 <2 5 <2 5 <2 5 610 <1000 MTBE 700 ppb <br /> I ! Oxygenate Compounds by 8260 ND except for MTBE <br /> 02-Dec-97 915 1 -899 000 1 <50 <0 50 <0 50 <0 50 <0 50 540 <1000 1 720 ppb <br /> I Oxygenate Compounds by 8260 ND except for MTBE <br /> 29-Jan-98 670 i -654 000 k <50 I <0 50 <0 50 <0 50 f <0 50 300 <1000 ' 400 ppb <br /> 1 1 ` Oxygenate Compounds by 8260 ND except for MTBE <br /> 23-Apr-98 I 534 -518 000 <100 <1 0 <1 0 <1 0 <1 0 400 <1000 350 ppb <br /> MW-5 I ITop casing elevation (ft) 312 a I I <br /> 24-Jan-95 1467 1 -11 54 ! 001 1 NA NA NA NA NA NA NA <br /> New top casing elevation (ft) 1 88 b 1 <br /> 29-Mar-95 971 -783 1 000 280000 6900 1 11000 1300 11000 1 NA NA <br /> 27-Jul-95 I 1203 -1009 1 008 NA NA 1 NA NA NA I NA NA <br /> 10-Oct-95 1368 -11 79 1 002 NA NA I NA NA I NA NA NA <br /> 22-Jan-96 1214 -1026 000 110000 12000 16000 1800 1 11000 E NA NA I <br /> 24-Apr-96 9 47 -7 57 003 NA NA NA NA NA j NA NA <br /> 30-Jul-96 11 14 -926 000 10000 14000 17000 1400 1 8700 620000 1 NA <br /> 25-Oct-96 1208 1 -1020 000 I <500000 I 18000 14000 <5000 6200 2200000 NA <br /> 06-Feb-97 1 788 -600 000 <100000 12000 12000 1600 10000 1100000 NA <br /> 02-Apr-97 924 1 -736 000 <200000 14000 14000 2000 I 11000 i 1300000 NA <br /> 08-Jul-97 1008 -820 000 <250000 17000 I 16000 <2500 I 8400 i 1600000 NA <br /> V <br /> OC <br /> s <br /> by 8260 ND except for Benzene 13000 ppb, <br /> 02-Sep-97 11 36 NA 000 <500000 9500 9100 <5000 6100 830000 I 600000 Oxygenates by 8260 ND except for MTBE 830000 ppb <br /> I I I I Oxygenate Compounds by 8260 ND except for MTBE <br /> 02-Dec-97 11 03 i -915 1 000 ' <250000 I 14000 13000 <2500 9700 i 710000 540000 1 890000 ppb <br /> Oxygenate Compounds by 8260 ND except for MTBE <br /> 29-Jan-98 I 8 71 -683 000 120000 18000 15000 2200 13000 970000 470000 ' 630000 ppb <br /> 1 Oxygenate Compounds by 8260 ND except for MTBE <br /> 23-Apr-98 799 -611 1 0 00 95000 14000 13000 I 2$00 15000 260000 76000 1 300000 ppb,DIPE 11 ppb,and TAME 2600 ppb <br /> 1 <br /> 2400783 1 <br />