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TA* 1 <br /> WELL CONCENTRATIONS - <br /> Shell Oil Products Company <br /> 3725 Tracy Boulevard <br /> Tracy, California <br /> WIC#204-7884-0901 <br /> Sample Measured Corrected ' SP TPPH Bi T E ! X MTBE Methanol Comments <br /> GW Depth GW Elev <br /> Date ; (ft) (ft) (ft) (uglL) (uglL) I (uglL) (ug/L) (uglL) (uglL) (uglL) <br /> MW-1 A I Top casing elevation (ft) 9701 1 1 <br /> 26-Sep-89 I NA NA NA <50 <0 5 <2 ; <2 <2 NA NA <br /> 28-Aug-90 i NA i NA NA <50 <0 5 <0 5 j <0 5 <0 5 NA NA <br /> 19-Nov-90 1 NA ! NA NA <50 <0 5 <0 5 <0 5 <0 5 NA NA <br /> 26-Feb-91 j 895 8806 000 <50 <0 5 <0 5 <0 5 <0 5 1 NA NA <br /> 17-May-91 911 8790 i 000 <50 k <0 5 <0 5 I <0 5 1 <0 5 i NA NA <br /> 20-Aug-91 i 945 8756 E 000 <50 <0 5 <0 5 1 <0 5 I <0 5 NA NA <br /> 21-Nov-91 928 8773 j 000 ` <50 <0 5 <0 5 <0 5 <0 5 I NA ; NA I <br /> 14-Feb-92 855 j 8846 000 <50 i <0 5 <0 5 <0 5 <0 5 j NA NA <br /> 20-Feb-93 1 754 , 8947 1 000 <50 i <0 5 <0 5 <0 5 <0 5 NA i NA <br /> 15-Feb-94 902 8799 000 ' <50 <0 5 <0 5 <0 5 i <0 5 NA NA <br /> 23-Feb-95 j 878 f 8823 j 000 i <50 <0 5 <0 5 1 <0 5 <0 5 NA NA <br /> 29-Feb-96 800 8901 000 70 <0 5 <0 5 <0 5 j <0 5 NA NA <br /> 30-Apr-96 907 8794 000 j 2700 <0 5 <0 5 <0 5 <0 5 NA NA <br /> 20-Aug-96 994 j 8707 000 <10000 <100 <100 <100 <100 39000 NA MTBE by 8260 45000 ppb <br /> 07-Feb-97 I 830 8871 000 j <1000 <10 <10 j <10 <10 E 3600 f NA 1 <br /> 05-Jun-97 941 8760 000 I <5000 <50 <50 <50 <50 23000 ! NA <br /> i ND for VOCs by 8260 and <br /> Oxygenate Compounds except for <br /> 27-Aug-97 978 ' 8723 000 <250 <2 5 6 <2 5 <2 5 <2 5 73000 20000 MTBE 77000 ppb <br /> MW-1A ( DUP)i <br /> 20-Feb-93 j NA NA NA <50 <0 5 <0 5 <0 5 <0 5 NA NA <br /> 15-Feb-94 j NA I NA NA j <50 I <0 5 <0 5 ; <0 5 <0 5 NA I NA <br /> 20-Aug-96 NA I NA NA <10000 i <100 <100 <100 <100 i 39000 NA I <br /> 07-Feb-97 1 NA NA NA <1000 <10 <10 <10 <10 3600 NA i <br /> 97381 1 <br />