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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# WMS2000712 Date analyzed 07/12/00 <br /> Matrix Liquid Spiked Sample Blank Spike <br /> Units 1x92 <br /> PARAMETER Method# SA SR SP SP SPD SPD RPD QC LIMITS <br /> 992 492 1192 %R 49I1, %R RPD ; %R <br /> 11,1-Dichloroethene 8240/8260 1 40 ND 38 5 96 40 7 1 1.02 5 6 25 50-150 <br /> 1 , <br /> Methyl-tert-butyl ether 8240/8260 40 ND 393 98 357 89 96 25 50-150 <br /> Benzene ; 8240/8260 40 ND 381 95 389 97 <br /> 21 25 50-150 , <br /> ;Tnchloroethene ; 8240/8260 ; 40 ; ND 1 373 ; 93 ; 389 1 97 ; 42 ; 25 ; 50-150 ; <br /> 'Toluene 1 8240/8260 1 40 1 ND 1 366 1 92 1 376 1 94 ; 2 7 25 1 50-150 1 <br /> 1Chlorobenzene 1 8240/8260 1 40 1 ND 1 392 1 98 1 393 1 98 1 0 3 1 25 50-150 1 <br /> ,Surrogates <br /> ;Toluene-d8 ; 8240/8260 ; ; 99% 1 96% 1 ; 98% 1 ; ; ; 65-135 ; <br /> �Dibromofluoromethane 8240/8260 ; 100% i 100% ; ; 103% ; { 65-135 <br /> , , , , , <br /> :4-Bromofluorobenzene 8240/8260 1 1 92% 1 107% ; ; 103% 1 ; ; ; ' <br /> 65-135 <br /> ;MTBE-d3 1 8240/8260 1 1 100% 1 105% + 196% 1 ; 1 , <br /> , 65-135 ; <br /> Wefimtion 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 />