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TAVE 1 <br /> WELL CONCENTRATIONS <br /> Shell Oil Products Company <br /> 3725 Tracy Boulevard <br /> Tracy, California <br /> WIC#204-78840901 <br /> Sample Measured Corrected SPTPPH B T E X MTBE Methanol Comments <br /> GW Depth GW Elev <br /> Date (ft) (ft) (ft) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) <br /> MW-1A * Top casing elevation (ft) 9701 <br /> 26-Sep-89 NA NA NA <50 <0 5 <2 <2 <2 NA NA <br /> 28-Aug-90 NA NA NA <50 <0 5 <0 5 <0 5 <0 5 NA NA <br /> 19-Nov-90 NA NA NA <50 <0 5 <0 5 <0 5 <0 5 NA NA <br /> 26-Feb-91 895 8806 000 <50 <0 5 <0 5 <0 5 <0 5 NA NA <br /> 17-May-91 911 8790 000 <50 <0 5 <0 5 <0 5 <0 5 NA NA <br /> 20-Aug-91 945 8756 000 <50 <0 5 <0 5 <0 5 <0 5 NA NA <br /> 21-Nov-91 928 8773 000 <50 <0 5 <0 5 <0 5 <0 5 NA NA <br /> 14-Feb-92 855 8846 000 <50 <0 5 <0 5 <0 5 <0 5 NA NA <br /> 20-Feb-93 754 8947 000 <50 <0 5 <0 5 <0 5 <0 5 NA NA <br /> 15-Feb-94 902 8799 000 <50 <0 5 <0 5 <0 5 <0 5 NA NA <br /> 23-Feb-95 878 8823 000 <50 <0 5 <0 5 <0 5 <0 5 NA NA <br /> 29-Feb-96 800 8901 000 70 <0 5 <0 5 <0 5 <0 5 NA NA <br /> 30-Apr-96 907 8794 000 2700 <0 5 <0 5 <0 5 <0 5 NA NA <br /> 20-Aug-96 994 8707 000 <10000 <100 <100 <100 <100 39000 NA MTBE by 8260 45000 ppb <br /> 07-Feb-97 830 8871 000 <1000 <10 <10 <10 <10 3600 NA <br /> 05-Jun-97 941 8760 000 <5000 <50 <50 <50 <50 23000 NA <br /> ND for VOCs by 8260 and <br /> Oxygenate Compounds except for <br /> 27-Aug-97 978 8723 000 <250 <2 5 <2 5 <2 5 <2 5 73000 20000 MTBE 77000 ppb <br /> Oxygenate Compounds ND except <br /> 19-Nov-97 939 8762 000 <500 <5 0 <5 0 <5 0 <5 0 66000 21000 for MTBE 71000ppb <br /> 11-Feb-98 767 8934 000 <50 <0 50 <0 50 <0 50 <0.50 81 <1000 <br /> MW-1A( DUP) <br /> 20-Feb-93 NA NA NA <50 <0 5 <05 <05 <05 NA NA <br /> 240-0813 1 <br />