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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 Sample <br /> QC Batch# WMS2000713 Date analyzed 07/13/00 <br /> Matrix Liquid Spiked Sample Blank Spike <br /> Units 49/1, <br /> PARAMETER Method SA SR SP SP SPD SPD RPD QC LIMITS <br /> !ate- 99/L 49/L %R 49/L %R RPD ; %R <br /> 11,1-Dichloroethene 8240/8260 40 l ND l 39 1 98 449 112 13 8 25 50-150 ` <br /> i i , I <br /> 1Methyl-tent-buryl ether 8240/8260 ; 40 ND 37 1 93 424 106 133 25 ; 50-150 <br /> {Benzene 8240/8260 1 40 1 ND 395 99 423 106 68 25 1 50-150 <br /> Unchloroethene 8240/8260 40 ND 514 129 474 119 8 1 25 1 50-150 <br /> Toluene 8240/8260 40 1 ND 379 1 95 393 1 98 3 6 1 25 1 50-150 <br /> ;Chlorobenzene 8240/8260 40 ND 1 382 96 4I 0 l 103 7 I 1 25 l 50-150 <br /> ,'Surrogates <br /> , <br /> MTBE-d3 8240/8260 1 114% 1 97% 1 105% 1 1 65-135 <br /> 1D1bromofluoromethme 8240/8260 l I12% l 104% 110% 1 65-135 ; <br /> Toluene-d8 1 8240/8260 1 1 102% 1 100% ; 1 97% 1 1 I 65-I35 1 <br /> ;4-Bromofluorobenzene 1 8240/8260 1 1 93% 94% 1 1 101% 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 <br /> SP Spike Result <br /> SP(%R) Spike%Recovery <br /> SPD Spike Duplicate Result <br /> SPD(%R) Spike Duplicate%Recovery <br />