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Entech Analytical Labs,Inc T 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# WGCMS990927 Date analyzed 09/27/99 <br /> Matrix Water Spiked Sample Blank Spike <br /> Units µ$1L <br /> PARAMETER Method# SA SR SP SP SPD SPD RPD QC LIMITS <br /> P9/L Pg/L µ8/L %R µg/L %R RPD %R <br /> 1 E 1-Dichloroethene 8240/8260 25 ND 1 234 94 23 6 94 09 25 50-150 <br /> ;Methyl-tert-butyl ether 8240/8260 25 ; ND 1 237 95 250 100 53 25 50-150 <br /> ;Benzene <br /> 8240/8260 25 ND 256 102 256 102 00 25 50-150 <br /> 'Trichloroethene 1 8240/8260 25 1 ND 266 1 106 1 269 ! 108 1 1 1 25 50-150 <br /> 1 4 1 It I <br /> Toluene 1 8240/8260 1 25 1 ND 1 249 1 100 252 101 1 12 25 1 50-150 <br /> 1Chlorobenzene 8240/8260 1 25 1 ND 1 245 1 98 1 248 1 99 1 12 1 25 1 50-150 1 <br /> !Surrogates <br /> 1Dibromofluoromethane 1 8240/8260 1 89% 1 91% 1 1 42% 1 1 &' 1 65-135 1 <br /> (MTBE-d3 1 8240/8260 1 1 88% 1 98% 1 1 104% 1 &' 1 1 65-135 1 <br /> &'Toluene�8 &' 8240/8260 &' &' 109%_&' 111% &' &' 110% 1 1 1 1 65-135 &' <br /> 14-Bromofluorobenzene 1 8240/8260 1 1 109% 1 113% 1 1 110% 1 1 1 65-135 1 <br /> 1 1 L <br /> Definition of Tetras <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 Duphcate Result <br /> SPD(%R) Spike Duplicate%Recovery <br />