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1 <br />' Entech Analytical Labs,Inc 525 Del Rey Avenue,Suite E <br /> Sunnyvale,CA 94086 <br />' QUALITY CONTROL RESULT S SUMMARY <br />' Volatile Organic Compounds <br /> Laboratory Control Sample <br /> QC Batch## WGCMS990830 Date analyzed 08/30/99 <br />' Matrix Water Spiked Sample Blank Spike <br /> Units µg/L <br /> PARAMETER Method# SA SR SP SP SPD SPD RPD QC LIMITS <br /> µg/L µg/L 99/1, %R 99/1- %R RPD %R <br /> 8240/8260 25 ND 25 101 25 101 0 4 25 50-150 <br /> 11,1-Dichloroethene 1 1 <br /> + 1 <br /> ;Methyl-tent-butyl ether 8240/8260 25 ND 26 104 25 98 56 I 1 <br /> 1 25 50-150 <br /> 1 I I 1 1 F 1 1 I <br /> ;Benzene ; 82401$260 25 ND 26 ; 104 ; 27 106 1 23 1! 25 50-150 <br /> 1 1 I 1 1 1 1 1 1 1 I 1 <br /> !Trichloroethene ; 8240/8260 1 25 1 ND 26 1 103 1 27 1 107 1 42 1 25 1 50-150 <br /> + 1 I I 1 1 1 1 I 1 1 I <br /> ;Toluene ; 8240/8260 1 25 1 ND 1 27 1 106 1 27 106 1 04 1 25 1 50-150 <br /> 1 <br />' ;Chlorobenzene 8240/8260 1 25 1 ND 1 27 1 108 1 28 110 1 15 1 25 1 50-150 <br /> 1 <br /> 15`j,ITI'pg(treS <br /> 1 1 1 1 1 1 1 1 1 1 1 1 <br /> 1 1 1 I <br /> ;Dibromotluorornethane ; 8240/8260 1 1 1 1 1 80% ; 89% ; ! 87% ; ! ; ! 65-135 ; <br /> 1 1 1 I <br />' <br /> 8240/8260 1 1 71% ; 96% 96% ; 1 65-135 <br /> !MTBE-dl e 1 I <br /> !Toluene-d8 ; 8240/8260 1 89% 1 94% 1 1 93% 1 ; ; 1 65-135 <br /> 1 1 <br /> 14-Bromofluarobenzene 8240/8260 75% 1 88% ; 89% ; ; 65-135 <br />' 0 Definition of Terms <br /> iia 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(°/nR) Spike Duplicate%Recovery <br /> I <br /> I <br /> 1 <br /> 1 <br />