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SEntech 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#: WMS991205 Date analyzed: 12/05/99 <br /> Matrix: Liquid Spiked Sample: Blank Spike <br /> Units: µg/L <br /> PARAMETER Method# SA SR SP SP SPD SPD RPD QC LIMITS <br /> '! !�� !ate P� %R Ply- %R RPD %R <br /> +1,1-Dichloroethene + 8240/8260 40 1 ND 1 44.3 1 111 1 46.7 117 50-150 <br /> 1 I 1 , , 1 { , 5.3 25 ; , <br /> 1 1 I 1 I 1 1 1 1 1 1 <br /> ;Methyl-tert-butyl ether 8240/8260 ; 40 ND 35.1 88 ; 36.3 ; 91 3.4 25 50-150 <br /> , 1 1 11 + 1 1 1 1 1 1 <br /> ;Benzene 8240/8260 ; 40 1. ND ; 40.3 101 41.2 ; 103 ; 2.2 ; 25 ; 50-150 ; <br /> 1 1 1 1 + <br /> ;Trichloroethene I 8240/8260 ;1 40. ; ND 39.4 ; 99 ; 38.4 ; 96 ; 2.6 ; 25 ; 50-150 <br /> 1 1 1 1 1 1 1 1 1 1 + <br /> ,'Toluene 8240/8260 40 ND i 39.7 99 1 41.9 I 105 5.4 25 50-150 <br /> +Chlorobenzene <br /> 8240/8260 ; 40 ; ND 40.0 ; 100 ; 42.7 ; 107 ; 6.5 ; 25 ; 50-150 <br /> 1 1 I + 1 1 1 1 1 1 <br /> , 1 1 I 1 1 1 1 1 1 1 <br /> 1 S,,-og0les + 1 1 I 1 1 1 1 1 + + <br /> 1 1 1 1 1 1 1 1 1 1 + <br /> 1 I 1 1 1 + <br /> ;Dibromofluoromethane i 8240/8260 ; 93% ; 114% 1; ; 106% 65-135 <br /> ;MTBE-d3 8240/8260 107% ; 101% ; ; 99% ; ; ; ; 65-135 <br /> 1 I 1 1 + 1 1 1 1 1 1 <br /> (Toluene-d8 ; 8240/8260 l 102% l 100% i l 104°/u I 65-135 <br /> , ,. , 1 k , 1 1 1 1 + 1 <br /> s4-Bromofluorobenzene ; 8240/8260 ; ; 98% ; 110% ; ; 107% ; ; ; ; 65-138 <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 /> i <br />