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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 /> I Laboratory Control Sample <br /> QC Batch# WMS991108 Date analyzed 11/08/99 <br /> Matrix Liquid Spiked Sample Blank Spike <br /> Units Pg/L <br /> PARAMETER Method# SA SR SP SP SPD SPD RPD QC LIMITS <br />' ug/L gg/L µg/L %R µg/L %R RPD ; %R <br /> 1,1-Dichloroethene 8240/8260 40 ND 45 5 ; 114 450 113 1 1 25 ; 50-150 <br /> ,Methyl-tent-bury]ether 8240/8260 40 ND 327 82 286 72 134 25 50-150 <br />' <br /> 8240/8260 40 ND 42 8 107 42 3 106 t 1 2 25 50-150 ',Benzene , , , , , , <br /> ,Tnchloroethene , <br /> 8240/8260 40 ND 363 91 353 88 28 25 50-150 <br /> Toluene 8240/8260 40 N-D 434 1 109 432 1 108 05 25 1 50-150 <br /> Morobenzene 1 8240/8260 1 40 ND 1 420 1 105 422 1 106 1 05 25 1 50-150 <br /> !Surrogates <br /> IDibromofiuoromethane 1 8240/8260 1 1 104% 1 93% 1 1 88% 1 1 1 1 65-135 <br /> (MTBE-d3 1 8240/8260 1 1 115% 1 75% i i 66% 1 i 1 1 65-135 <br /> i 1 ii 0 i O p 1 i i 1 <br />' !Toluene d8 t 8240/8260 t t 109% t 100% t t 103% , t t 65-135 <br /> I i i i i i i i <br /> :4-Bromofluorobenzene 1 8240/8260 t t 89% t 107% 109% 1 65-135 <br /> , , , , 1 , 1 , <br /> Definition of Terms <br /> 0 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 /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> • <br /> 1 <br /> 1 <br />