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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 5arnple <br /> QC Batch#� WMS991224 Date analyzed: 12/24/99 <br /> Matrix: 'iquid Spiked Sample: Blank Spike <br /> Units: 4L <br /> PARAMETER Method# SA SR SP SP SPD SPD RPD QC LIIvII'fS <br /> Id pg/L—: n/L n/L ° µg/L % _ RPD ; %R <br /> IJ-Dichloroethene ; ,..8240/8260 40 ND 1 28.5 �7 1 28.5 71 0.0 25 50-150 <br /> ., 1 J 1 1 ', <br /> 1 1 I 1 , <br /> Methyl-tert-bury!ether 8240/8260 40 ND 26.8 67 27.7 3.3 ; 25 ; 50-150 <br /> ]Benzene .8240/8260 40 ND 26.4 66 26.1 1 65 1.1 25 50-150 <br /> Trichloroethene 8240/8260 40 ND 1 30.0 i 30.10.3 25 50-150 <br /> Toluene 8240/8260 1 40 1 ND 1 25.5 625.5 64 0.0 25 1 50-150 <br /> 1®1I lChlorohenzene 1 8240/8260 1 40 1 ND 1.1 I 27.4' 1 69' 27.2 1 68 / 0.7 1 25 1 50-150 . 1 1 1 I 1 1 1 1 1 <br /> ]Sun-0gates <br /> 1 1 1 1 1 '1 1 <br /> IDibromotluorornethane 1 8240/8260 1 1 98% 1 99% 1 1 100% 1" 1 1 1 65-135 1 <br /> 1 1 1 f 1 1 1 1" 1 11 1 , <br /> 8240/8260 l 101% 1 97% 1 1 101%-1 1 `r 1 1 <br /> (MTBE-d3 65-135 <br /> !Toluene-d$ 1 8240/8260 95% 1 93% J 94% 1 65-135 1 <br /> l i'- 1 1 1 1 1 <br /> 14-Bromoflucrobenzene 1 8240/8260 1 1 .95% 1 94% 1 94% 1 <br /> 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 1 <br /> SP: Spike Result <br /> SP(%R): Spike%Recovery <br /> SPD: S'ike Duplicate Result J <br /> SPD(%R): Spike Duplicate%Recovery <br /> E <br /> I <br /> i <br /> T <br /> L� <br />