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Entech Analytical Labs,Inc. 525 Del Rey Avenue,Suite E <br /> Sunnyvale,CA 94086 <br /> QUALITY CONTROL RESULTS SUMMARY <br /> METHOD Gas Chromatography-Volatile Organics <br /> Laboratory Control Spikes <br /> QC Batch# WVOC1000406 Date Analyzed 04/06/00 <br /> Matrix Liquid Quality Control Sample Blank Spike <br /> Units <br /> : <br /> ARAMETER Method# ; SA SR SP SP SPD SPD RPD QC LIMTTS <br /> L <br /> %R %R % RPD f %R <br /> Benzene ; 602/8020 ; 40 ; ND ; 38 ; 96 35 ; 88 ; 8 9 ; 25 58-116 <br /> �Chlorobenzene 601180I0 40 1 ND 49 ; 123 i 40 101 1 203 25 60-130 <br /> 1,1-Dichloroethane <br /> ' 601/8010 40 1 ND 1 46 116 1 37 1 92 22 7 25 1 52-131 <br /> ,'Toluene 602/8020 ; 40 ND 39 96 ; 34 1 86 116 25 49-125 <br /> ;Tnchloroethene 601/8010 1 40 ND 50 126 1 40 1 100 227 25 36-134 ; <br /> �Bromochloromethane 601/8010 ; 101% ; 104% ; 1 87% 1 65-135 <br /> Fluorobenzene 602/8020 ; 91% 100% ; 96% 1 <br /> 65-135 , <br /> Definition of Terms <br /> na Not Analyzed in QC batch <br /> SA Spike Added <br /> SR Sample Result <br /> RPD(°/a) Duplicate Analysis-Relative Percent Difference <br /> SP Spike Result <br /> SP(%R) Spike%Recovery <br /> SPD Spike Duplicate Result <br /> SPD (%R) Spike Duplicate%Recovery <br /> NC Not Calculated <br />