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' Entech Analytical Labs,Inc <br /> 525 Del Rey Avenue,Suite E <br /> Sunnyvale, CA 44086 <br /> QUALITY CONTROL RESULTS SUMMARY <br />' Volatile Organic Compounds <br /> Laboratory Control Sample <br /> QC Batch# WMS000506 Date analyzed 05/06/00 <br /> Matrix Liquid Spiked Sample Blank Spike <br /> Units µg/L <br />' PARAMETER Method# SA SR SP SP = SPD SPD RPD QC LIMITS <br /> 99(L lLg/L 1Ltg/L %R + Pg/L %R RPD "I %R <br /> ;1,1-D+chlorcethene ; 8240/$260 ; 40 ; ND + 423 106 47 2 118 + 109 2550-150 <br /> ;Methyl-tent-butyl ether 8240/8260 1 40 ND 39 1 9$ 45 7 1 114 15 625 1 50-150 <br /> `Benzene 8240/8260 1 40 1 ND 402 101 444 111 9 9 25 50-150 <br /> ITnchloroethene ; 8240/8260 40 ND 1 460 115 497 122 I 57 1 25 50-150 <br /> Toluene ' 8240/8260 40 3 ND 1 39 8 100 = 42 1 105 5 6 1 25 50-150 1 <br />' 1Chlorobenzene j 8240/8260 I 40 1 ND I 41 3 ; 103 44 1 110 1 6 6 1 25 1 50-I50 1 <br /> 1 Surrogates <br /> !Toluene-d8 8240/8260 ; 96% ; 97% 98% ; i 65-135 1 <br /> 0bromofluoromethane 8240/8260 ; 105% 1108% 1 1 107% 1 65-135 <br />' <br /> :4-Bromof]uorobenzene $24018260 91% 978% i � 100% 65-135 I <br /> :MTBE-d3 8240/8260 113/o 1 109/0 1 1 113% i 1 65-135 <br /> MDefinition 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 MR) Spike% Recovery <br /> SPD Spike Duplicate Result <br /> SPD MR) Spike Duplicate%Recovery <br /> 1 <br />