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J <br /> 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# 8240W980623 Date analyzed 06/23/98 <br /> Matrix Water Spiked Sample El 1589 <br /> Units <br /> PARAMETER Method# SA SR SP SP SPD SPD RPD QC LIMITS <br /> %R g91L %R RPD I %R <br /> 11,1-Dichlormthene 1 624 25 ND 30 1 122% 31 1 123% t 0 25 50-150 <br /> 1Benzene 624 i 25 442 E 67 93% 68 94% 09 25 E 50-150 <br /> iTnchloroethene <br /> 624 25 ND 26 E 103% 26 104% 08 25 50-150 <br /> (Toluene i 624 25 i ND 26 i 103% 1 27 108% 4 5 25 50-150 <br /> i <br /> LChlorobenzene 624 25 ND E 26 105% 27 109% 37 25 j 50-150 <br /> t <br /> I <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 />