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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# 8240S980605 Date analyzed 06/05/98 <br /> Matrix Soil Spiked Sample E 10203 <br /> Units ggfKg <br /> PARAMETER Method# SA SR SP SP SPD SPD RPD QC LIMITS <br /> %R %R I RPD I %R <br /> 11,1-Dlehloroethene t 8240 1 25 1 ND 1 32 1 128% 1 29 1 116% 1 98 1 25 1 50-150 1 <br /> 1enzene <br /> ,B1 8240 I 25 I ND 1 31 124% I 1 31 1 124% { 00 I 25 1 50-150 <br /> I I 1 1 1 1 1 t i I 1 <br /> :Trichloroethene I 8240 I 25 I ND I 26 1 104% I 25 I 100% I 39 t 25 I 50-150 I <br /> Toluene 1 8240 1 25 1 ND 1 30 t 120% 1 30 t 120% 1 00 1 25 1 50-150 1 <br /> 'Chlorobenzene i 8240 25 ND 27 108% ,' 27 108% 00 25 SO-150 j <br /> 1 <br /> 1 i 1 1 I 1 I t 1 I 1 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 /> NC Not Calculated <br />