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Entech Analytical Labs,Inc. 525 Del Rey Ave, Suite E <br /> Sunnyvale, CA 94086 <br /> QUALITY CONTROL RESULTS SUMMARY <br /> Volatile Organic Compounds <br /> QC Batch#- WGCMS990131 Date analyzed 01/31/99 <br /> Matrix Water Spiked Sample Blank Spike <br /> Units 99/1- <br /> PARAMETER <br /> 9/LPARAMETER Method# : SA SR SP SP SPD SPD RPD QC LIMITS <br /> [ig/L }lg2 Ism- %R µg/L %R RPD %R <br /> I I,l-Dichloroethene . 8240/8260' 25 1 ND I 23 1 94 25 1 98 46 1 25 50-150 <br /> 'Methyl-tert-butyl ether 1 8240/82601 25 ' ND ' 26 ' 104 ' 27 ' 109 ' 45 ' 25 ' 50-150 ' <br /> 1 1 1 3 1 1 1 1 1 1 1 <br /> .Benzene 18240/826011 25 . ND 1 25 . 99 . 25 1 100 1 12 1 25 1 50-150 1 <br /> 1Tnchloroethene 8240/8260 . 11 25 1 ND 1 25 ' 99 ' 25 1 98 1 08 1 25 1 50-150 1 <br /> 'Toluene 1 8240/82601 25 ' ND ' 25 ' 100 ' 25 1 1 1 99 1 08 1 25 1 50-150 ' <br /> 1Chlorobenzene 1 8240/82601 25 . ND . 26 . 104 1 25 . 101 1 23 1 25 1 50-150 1 <br /> 1 1 I 1 1 1 1 1 1 1 1 1 <br /> 1 1 t 1 1 1 1 1 1 I 1 1 <br /> 1 1 ! 1 1 1 1 1 1 1 1 1 <br /> 1 1 1 1 1 1 1 1 1 ! 1 1 <br /> 1 1 1 1 1 1 1 1 1 k i 1 <br /> 1 1 1 1 1 1 1 1 1 1 1 1 <br /> 1 1 1 1 I 1 1 1 1 t i 1 <br /> 1 1 1 1 1 7 1 1 1 1 ! 1 <br /> l <br /> I <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 /> 1 <br />