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1 <br /> 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# WM5991109 Date analyzed 11/09/99 <br /> Matrix Liquid Spiked Sample Blank Spike <br />' Units µg/L <br /> PARAMETER Method# SA SR SP SP SPD SPD RPD QC LIMITS <br />' ug/L µg/L ug/L %R Pg/L %R RPD ; %R <br /> '1,1-Dichloroethene 8240/8260 40 ND 462 I16 473 118 2 4 25 50-150 <br /> ;Methyl-ten-butyl ether ; 8240/8260 40 ND ; 449 ; 112 ; 400 ; 100 115 ; 25 50-150 <br /> 'Benzene 8240/8260 40 ND 429 107 442 111 30 25 50-150 ' <br /> I 1 <br /> lTnchloroethene $24018260 40 l ND 442 111 433 108 21 1 25 50-150 ; <br /> /Toluene 8240/8260 40 ND 45 3 1 113 458 115 1 1 1 25 50-150 <br /> 1 8240/8260 40 1 ND 1 44 5 1 111 1 44 9 1 112 1 0 9 1 25 1 50-150 1 <br /> �Chlorobenzene 1 <br /> I <br /> 'Surrogates <br /> 81[!70 ales <br /> i 8 <br /> IDibromofluoromethane 1 8240/8260 1 1 105% ; 98% 97% 1 1 65-135 1 <br /> IMTBE-d3 1 8240/8260 1 1 115% 105% 95% 1 I 65-135 1 <br /> 4 i o 1 1 i o 65-135 i:Toluene-d8 8240/8260 106% , 100% r 100% , r r , <br /> 14-Bromofluorobenzene 1 8240/8260 1 95% 1 101% 1 1 104% 1 1 1 1 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 /> I <br /> I <br /> I <br />