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Entech Analytical Labs, Inc 525 Del Rey Ave, Suite E <br /> . Sunnyvale, CA 94086 <br /> QUALITY CONTROL RESULTS SUMMARY <br /> Volatile Organic Compounds <br /> QC Batch# WGCMS981217 Date analyzed 12/1 8/98 <br /> Matrix Water Spiked Sample Blank Spike <br /> Units Pg/l, <br /> : <br /> : <br /> PARAMETER Method# ; SA SR SP SP : SPD SPD RPD QC LIMITS <br /> 99/L P9/L P91L %R lig//- %R RPD 1 %R <br /> Dichloroethene 18240/82601 25 . ND 1 23 1 92 1 24 <br /> 1 . 95 1 26 1 25 1 50-150 <br /> . . . . . . . . . . . <br /> 'Methyl-tert-butyl ether ' 8240/82601 25 ' ND ' 24 1 98 ' 27 ' 106 ' 83 ' 25 ' 50-150 ' <br /> .Benzene ' 8240/82601 25 . ND . 23 1 92 1 24 1 94 . 26 1 25 1 50-150 <br /> ,Tnchloroethene <br /> 18240/82601 25 1 ND 1 27 1 108 1 28 1 114 1 5 1 1 25 1 50-150 1 <br /> 'Toluene 18240/82601 25 ND 1 26 ' 104 1 26 ' 106 ' 11 ' 25 50-150 ' <br /> .Chlorobenzene . 8240/82601 25 1 ND 1 25 1 102 . 26 1 103 1 16 1 25 1 50-150 1 <br /> , <br /> e <br /> Definition of Tennis <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 /> NC Not Calculated <br /> I I <br /> I <br /> I II I I it <br /> �- <br /> II <br />