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1.j 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#: WMS000627 Date analyzed: 06/27/00 <br /> Matrix: Liquid Spiked Sample: Blank Spike <br /> Units: µSIL <br /> PARAMETER Method# SA SR SP SP SPD SPD RPD QC LIMITS <br /> 991L i µS/L µtg - %R µ$il- %R RPD 1 %R <br /> 1,1-Dichloroethene 824018260 l 40 N➢ l 35.5 l 89 36.1 l 901.7 25 50-150 <br /> Methyl-text-butyl ether 8240/8260 40 ND 46.2 116 41.0 l 103 11.9 25 50-150 <br /> ;Benzene 8240/8260 40 ND 38.1 95 35.7 ; 89 6.4 25 50-150 <br /> Trichloroethene 8240/8260 40 1 ND 46.3 116 38.4 96 18.6 25 1 50-150 <br /> ;Toluene 8240/8260 40 ND 49.4 124 41.1 103 18.4 25 50-150 <br /> ;Chlorobenzene 8240/8260 40 i ND ; 42.6 107 40.4 101 5.3 25 50-150 <br /> 'Surrogates <br /> ;Toluene-d8 $24018260 96% 890/. 94% 65-135 <br /> bibromofluoromethane 8240/8260 949X) ; 104% 95% ; 65-135 <br /> f <br /> 4-Bromofluorobenzene 8240/8260 1 109% 134% 1 106% 65-135 <br /> ' ;MTB&d3 8240/8260 102% ; 1000/D 70% 1 65-135 <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 /> 1. <br />