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CALTECH Environmental Laboratories <br /> t <br /> QA/QC Report <br />' Method 6015M /8 <br /> 021 B <br />' Matrix Soil <br /> Date Analyzed 2/27/03 <br />' Units ug/kg <br />' Perimeters LSC LCSD Spike LCS % LCSD% Limits RPD <br /> Added Rec. Rec. <br />' Benzene 47 49 50 94 98 70-130 4 <br /> Toluene 44 46 50 88 92 70-130 4 <br /> Eth benzene 40 42 50 1 80 84 70-130 4 <br /> X lenes 142 1 150- 1 150 1 95 100 70-130 5 <br />' TPH - Diesel 1075 1 1064 1000 1 108 106 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 /> I <br /> I <br />