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CALTECH Environmental Laboratories <br /> QA/QC Report <br /> Method 8260B <br /> IMatrix Water <br /> Date Analyzed 11/18x02 <br /> Units ug/L <br /> Perimeters LSC LCSD Spike LCS% LCSD% Limits RPD <br /> Added Rec Rec. <br />' <br /> 1,1-Dichloroethene 51 53 50 102 106 70-130 4 <br /> Benzene 54 53 50 108 106 70-130 2 <br /> Trichloroethene 55 52 50 110 104 70-130 6 <br /> Toluene 56 56 50 112 112 70-130 0 <br />' Chlorobenzene 54 53 50 108 106 70-130 2 <br /> m,2-Xylenes 114 126 100 114 126 70-130 10 <br /> lie <br /> LCS Laboratory Control Standard <br /> LCSD Laboratory Control Standard Duplicate <br /> RPD Relative Percent Difference of LCS and LCSD <br /> 1 <br /> Perimeters Blank Limits RPD <br /> 1,1-Dichloroethene 0 70-130 <br /> Benzene 0 70-130 <br /> Trichloroethene 0 70-130 <br /> Toluene 0 70-130 <br /> Chlorobenzene 0 70-130 <br /> tm, -X lenes 0 70-130 <br /> 1 <br /> 70 <br /> • <br />