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CALTECH Environmental Laboratories <br /> _ ,7_ 2-, <br /> QA/QC Report <br />' Method 8260B <br /> Matrix Water <br /> Date Analyzed 4/16/03 <br /> Units ug/L <br />' Perimeters LSC LCSD Spike LCS% LCSD % Limits RPD <br /> Added Rec Rec <br />' 1,1-DEchloroethene 54 60 50 108 120 60-140 11 <br /> Benzene 49 50 50 98 100 60-140 2 <br /> Trichloroethene 49 51 50 98 102 60140 4 <br /> Toluene 56 54 50 112 108 60-140 4 <br /> Chlorobenzene 57 52 50 114 104 60-140 9 <br /> m, -X lenes 84 81 100 84 82 60-140 2 <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 /> m,p-X lenes 0 70-130 <br />' I-n IAI I Y ISI DICAI-I PT,)' `t,V <br />