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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 /> QC Batch# SGCMS981206 Date analyzed 12/05/98 <br /> Matrix Soil Spiked Sample Blank Spike <br /> Units µmg <br /> PARAMETER Method# SA SR SP SP : SPD SPD RPD QC LIMITS <br /> pg/Kg: pg/Kg : pg/Kg ' %R ; µg/Kg ; %R RPD I %R <br /> I I I-Dichloroethene ' 8240/82601 25 1 ND 1 24 ' 95 1 27 ' 109 ' 13 7 ' 25 1 50-150 1 <br /> 1 1 1 1 1 1 1 1 1 , 1 1 <br /> 'Methyl-tert-butyl ether ' 8240/8260; 25 I ND ' 23 ' 92 ' 24 ' 95 ' 26 ' 25 ' 50-150 ' <br /> 'Benzene ' 8240/8260; 25 1 ND ' 23 ' 92 ' 22 ' $8 ' 44 ' 25 50-150 ' <br /> 1 1 1 1 1 1 1 1 1 1 1 <br /> 1Tnchloroethene 18240/82601 25 1 ND 1 26 1 104 1 26 1 103 15 1 25 1 50-150 1 <br /> 1 1 1 1 1 1 1 1 1 1 1 1 <br /> 1 1 1 1 1 1 1 1 1 1 1 I <br /> 'Toluene ' 8240/8260' 25 ' ND ' 27 ' 109 ' 27 ' 108 ' 1 1 ' 25 ' 50-150 ' <br /> 1 1 1 <br /> 'Chlorobenzene 1824018260' 97 1 0 0 , 25 1 50-150 25 1 ND ' 24 ' 97 ' 24 1 ' <br /> Note LCS and LCSD results reported for the following Parameter <br /> All <br /> • Acceptable LCS and LCSD results are reported when matrix interferences cause MS and MSD results to fall outside <br /> established QC limits <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 /> NC Not Calculated <br /> i <br /> I <br /> i <br />