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CALTECH Environmental Laboratories <br /> Ilj,r'3-3146 <br /> QA/QC Report <br />' Method 8015M /8021 B <br />' <br /> Matrix Water <br /> Date Analyzed 1114102 <br /> IUnits ug/L. <br /> Perimeters LSC LCSD Spike LCS% LCSD % Limits RPD <br /> I Added Rec Rec <br /> Benzene 423 448 50 85 90 70-130 5 9 <br /> Toluene 41 8 444 50 84 89 70-130 6 <br /> Eth benzene 45 558 50 90 112 70-130 24 <br />' <br /> Xylenes 143 147 150 95 98 70-130 32 <br /> TPH - Gasoline 497 503 500 1 99 101 60-140 2 <br /> LCS Laboratory Control Standard <br /> LCSD Laboratory Control Standard Duplicate <br /> RPD Relative Percent Difference of LCS and LCSD <br /> Method 8260B <br /> Matrix Water <br /> Date Analyzed 1/16/02 <br /> Units ug/L <br /> Perimeters LSC LCSD Spike LCS % LCSD% Limits RPD <br /> Added Rec. Rec. <br /> 1,1-Dichloroethene 54 5 51 9 50 109 104 70-130 46 <br /> Trichloroethene 43 488 50 86 98 70-130 14 <br /> Chlorobenzene 51 7 524 50 103 105 70-130 1 9 <br /> Toluene 519 46 50 104 1 92 70-130 12 <br /> Benzene 458 41 9 50 92 84 70-130 87 <br /> I <br /> LCS Laboratory Control Standard <br />' LCSD Laboratory Control Standard Duplicate <br /> RPD Relative Percent Difference of LCS and LCSD <br /> 1 <br /> ' I OTALLY DEDICATED 10 CUSTOMER SATISFACTION <br />