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OBLE 1 <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 5P TPPH B T I E X MTBE Methanol Comments <br /> GW Depth GW Elev <br /> Date (ft) (ft) (ft) (ug/L) (ug/L) 1 (ug/L) (ug/L) (ug/L) , (ug/L) (ug/L) <br /> MW-11 Top casing elevation (ft) 102 1 I <br /> 02-Dec-97 1000 -898 000 <50 <0 50 <0 50 <0 50 <0 50 <2 5 <1000 I Oxygenate Compounds by 8260 ND <br /> 29-Jan-98 777 -675 000 <50 <0 50 <0 50 <0 50 <0 50 <2 5 <1000= Oxygenate Compounds by 8260 ND <br /> 23-Apr-98 726 -624 000 <50 <0 50 <0 50 <0 50 <0 50 <2 5 i <1000 Oxygenate Compounds by 8260 ND <br /> 29-Jul-98 808 -706 000 <50 <0 50 1 <0 50 i <0 50 <0 50 I <2 5 <1000 Oxygenate Compounds by 8260 ND <br /> 06-00-98 891 i -789 000 <50 l <0 50 1 <0 50 <0 50 1 <0 50 <2 5 <1000 Oxygenate Compounds by 8260 ND <br /> MW-12 To cash elevation (ft) 3 39 <br /> Top 9 ( <br /> I Oxygenate Compounds by 8260 ND except for Ethanol <br /> 24-Dec-97 1367 -1028 000 <50 <0 50 <0 50 <0 50 <0 50 <2 5 <1000 38000 ppb <br /> 29-Jan-98 1206 -867 000 <50 <0 50 <0 50 <0 50 <0 50 1 <2 5 <1000 I Oxygenate Compounds by 8260 ND <br /> 23-Apr-98 1012 673 000 <50 29 39 14 58 1 <2 5 <1000 Oxygenate Compounds by 8260 ND <br /> 29-Jul-98 1269 -930 000 <50 I <0 50 <0 50 <0 50 <0 50 <2 5 <1000 Oxygenate Compounds by 8260 ND <br /> 06-Oct-98 1826 1 -14 87 000 <50 <0 50 <0 50A <0 50 <0 50 <2 5 <1 000--F Oxygenate Compounds by 8260 ND <br /> MW-13 Top casing elevation (ft) 1 14 <br /> 24-Dec-97 1333 -1219 000 <50 <0 50 <0 50 <0 50 1 26 <2 5 <1000 Oxygenate Compounds by 8260 ND <br /> 29-Jan-98 979 -865 000 <50 <0 50 <0 50 i <0 50 <0 50 1 <2 5 <1000 Oxygenate Compounds by 8260 ND <br /> 23-Apr-98 775 -661 000 <50 14 1 6 1 058 24 <2 5 <1000 j Oxygenate Compounds by 8260 ND <br /> 29-Jul-98 1021 -907 000 <50 <0 50 <0 50 <0 50 ; <0 50 <2 5 <1000 Oxygenate Compounds by 8260 ND <br /> 06-Oct-98 1094 -980 0 00 <50 <0 50 <0 50 <0 50 <0 50 <2 5 <1000 Oxygenate Compounds by 8260 ND <br /> MW-13(DUP) <br /> 24-Dec-97 NA NA 000 <50 i <0 50 I <0 50 <0 50 26 <2 5 <1000 Oxygenate Compounds y 8260 <br /> MW-14 Top casing elevation (ft) 135 <br /> 23-Dec-97 1487 -1352 000 <50 <0 50 <0 50 <0 50 063 1 <2 5 <1000 Oxygenate Compounds by 8260 ND <br /> 29-Jan-98 988 -853 000 <50 <0 50 I <0 50 1 <0 50 <0 50 <2 5 <1000 Oxygenate Compounds by 8260 ND <br /> 23-Apr-98 802 -667 000 <50 1 <0 50 <0 50 <0 50 <0 50 <2 5 <1000 Oxygenate Compounds by 8260 ND <br /> 29-Jul-98 1056 -921 000 <50 <0 50 <0 50 <0 50 <0 50 1 <25 <1000 Oxygenate Compounds by 8260 ND <br /> 06-Oct-98 11 00 1 -965 000 I <50 <0 50 <0 50 <0 50 <0 50 <2 5 <1000 Oxygenate Compounds by 8260 ND <br /> 240-0781 7 <br />