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TABLE 1 <br /> WELL CONCENTRATIONS <br /> Shell Oil Products Company <br /> 2575 Country Club Boulevard x <br /> Stockton,California <br /> WIC#204-7524-3505 <br /> Sample Measured Corrected SP TPPH B T E X i MTBE I Methanol Comments <br /> GW Depth GW Elev <br /> Date I (ft) (ft) (ft) (uglL) (ug/L) (uglL) (ug/L) (ug/L) (ug/L) (uglL) <br /> i <br /> 06-Feb-97 722 I -594 003 NA NA NA NA NA NA NA <br /> 02-Apr-97 837 -711 000 1 140000 14000 1 22000 3300 19000 440000 NA <br /> 08-Jul-97 958 -832 000 120000 15000 1 20000 I 2600 I 15000 i 410000 NA 1 <br /> I I I VOCs by 8260 ND except Benzene 13000,Toluene <br /> j I 15000,Xylenes 9400 AEI In ppb <br /> Oxygenate Compounds by 8260 ND except for MTBE <br /> 02-Sep-97 1066 I NA 000 120000 14000 20000 2600 14000 340000 280000 340000 ppb <br /> Oxygenate Compounds by 8260 ND except for MTBE <br /> 02-Dec-97 I 1020 -8 94 000 43000 5100 4000 850 4700 160000 82000 180000 ppb <br /> I i Oxygenate Compounds by 8260 ND except for MTBE <br /> 29-Jan-98 796 -670 000 80000 11000 12000 2700 16000 1 220000 100000 260000 <br /> Oxygenate Compounds by 8260 ND except for MTBE <br /> 23-Apr-98 723 -597 k 000 110000 18000 14000 2400 13000 400000 I 110000 690000 ppb and TAME 5300 ppb <br /> RW-1A(DUP) I I I <br /> 30-Jul-96 I NA I NA NA 140000 23000 28000 1 X500 14000 820000 NA MTBE by EPA Method 8260 890000 ppb <br /> 02-Apr-97 NA NA NA 130000 15000 24000 3400 19000 450000 NA <br /> VOCs ND except Benzene 14000,Toluene 18000 <br /> ppb,Xylenes 13000 All in ppb <br /> Oxygenate Compounds ND except for MTBE 350000 <br /> 02-Sep-97 NA NA NA 130000 15000 21000 1 2900 16000 360000 240000 ppb <br /> Oxygenate Compounds by 8260 ND except for MTBE <br /> 02-Dec-97 NA NA NA 54000 j 6300 8800 1500 8400 180000 I 77000 190000 ppb <br /> Abbreviations <br /> NA=Not analyzed or not available <br /> (DUP)=Duplicate sample <br /> ax=Not detected at detection limit of x <br /> TPPH=Total Purgeable Petroleum Hydrocarbons carbon range C6 to C12 by EPA Method 8015(Modified) <br /> (previously Total Petroleum Hydrocarbons as Gasoline) <br /> BTEX=benzene toluene,ethylbenzene,and xylenes by EPA Method 8020 <br /> MTBE=methyl tertiary-butyl ether by EPA Method 8020 <br /> SP=Separate Phase hydrocarbon <br /> Oxygenate Compounds = tertiary-butanol(TBA),methyl-tertiary-butyl ether(MTBE),dl Isopropyl ether(DIPE),ethyl tertiary-butyl ether(ETBE) <br /> 240 0783 7 <br />