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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#: SMS000417. Date analyzed: 04/17/00 <br /> Matrix: Solid Spiked Sample: Blank Spike <br /> Units: µg/kg <br /> PARAMETER Method# SA SR SP ? SP SPD SPD RPD QC LIMITS <br /> µg/kg ? µg/kg ? 119/kg ' %R E 49/kg 1 %R RPD <br /> ;1,1-Dichloroethene 1 8240/8260 1 25 ; ND 22.3 89 21.9 1 88 ; 1.8 25 1 65-135 <br /> !Benzene 1 8240/8260 1 25 ND 26.0 104 25.5 1 . 102 1.9 25 65-135 ; <br /> ;Trichloroethene8240/8260 ` 25 ND' 26.6, ; 106 1 27.3 1 109 2.6 25 65-135 <br /> !Toluene 8240/8260 25 ND 1 26.2 1 105 1 25.9 104 1 1.2 1 25 1 65-135 <br /> Chlorobenzene <br /> 8240/8260 '25 1 .ND, 1 25.8 1 103 1 25.3 1 101 1 2.0 1 25 1 65-135 1 <br /> Surrogates <br /> !Toluene-d8 1 8240/8260 1 1 103% 1 104% 1 1 101% 1: 1 1 65-135 1 <br /> 1Dibromofluoromethane 1 8240/8260 1 1 100% 1 110% 1- 1 107% 1 1 1 1 65-135 1 <br /> 14-Bromofluombenzene 1 8240/8260 1. 1 103% 1 111% 1 1 109% 1 1 1 65-135 <br /> 11,2-Dichloroethane-d4 1 8240/8260 1 1 108% 1 130% 1 1 125% 1 1 1 65-135 1 <br /> Definition of Terms: <br /> na: 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 /> NC: Not Calculated <br />