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Entech Analytical Labs,Inc 525 Del Rey Avenue,Suite E <br /> Sunnyvale,CA 94086 <br /> QUALITY CONTROL RESULTS SUMMARY <br /> Volatile Organic Compounds <br /> Laboratory Control Sample <br /> QC Batch# WMS000405 Date analyzed 04/05/00 <br /> Matrix Liquid Spiked Sample Blank Spike <br /> Units lWL <br /> PARAMETER Method# SA SR SP SP SPD SPD RPD QC LIMITS <br /> lam !19/1- !ate %R 99/L %R RPD %R <br /> 1,1-Dichloroethene 82401$260 ; 40 1 ND ; 396 99 ; 430 1 108 1 $2 1 25 1 50-150 <br /> Methyl-tent-butyl ether 8240/8260 ; 40 ; ND 408 102 420 105 29 1 25 1 50-150 1 <br /> ;Benzene 8240/8260 ; 40 ND '' 419 105 1 42 3 106 1 <br /> F � 1 0 � 25 50-150 <br /> Unchloroethene ; 8240/8260 40 ND 1 430 ; 108 1 455 ; 114 56 25 50-150 <br /> :Toluene 8240/8260 40 € ND 41 1 103 1 423 1 106 1 29 25 1 50-150 <br /> Chlorobenzene 1 8240/8260 ; 40 ND 418 105 1 420 1 105 1 05 1 25 50-150 <br /> ;Surrogates <br /> !Toluene-d8 ; 8240/8260 ; 104% ; 96% ; ; 99% ; ; 65-135 <br /> 1Dibromofluorortiethane 8240/8260 ; 99% 98% ; 102% ; ; 65-135 <br /> �¢Bromofluorobenzene $24018260 99% { 98% 99% ii 65-135 <br /> !MTBE-d3 8240/8260 97% 95% 99% 55-135 1 <br /> Definition of Terms <br /> iia Not Analyzed in QC batch <br /> SA Spike Added <br /> SR Sample Result <br /> RPD(%) 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 />