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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# 8240W980622 Date analyzed 06/22/98 <br /> Matrix Water Spiked Sample El 1584 <br /> Units <br /> PARAMETER Method# SA SR SP SP SPD SPD RPD QC LIMITS <br /> %R %R RPD 1 %R <br /> 11,1-Dichloroethene [ 624 I 25 [ ND 1 32 128% 1 32 1 128% 1 03 1 25 I 50-150 [ <br /> 1 I ! 1 I I 1 1 I 1 1 I <br /> ,Benzene I 624 1 25 1 ND 1 27 1 106% ! 26 1 106% I 04 I 25 I 50-150 [ <br /> ITnchloroethene I 624 I 25 1 ND I 26 1 106% I 27 1 107% ! 1 I I 25 1 50-150 I <br /> I [ <br /> IToluene t 624 [ 25 1 ND 1 27 1 108% 1 27 1 108% [ 04 1 25 I 50-150 1 <br /> 1 [ 1 I I I I l 1 1 1 I <br /> IChlorobenzene 1 624 1 25 1 ND I 27 [ 109% , 28 I 110% [ 1 1 1 25 I 50-150 I <br /> 1 I I 1 [ 1 1 [ 1 1 1 1 <br /> I 1 1 1 I I l 1 1 I ( 1 <br /> I 1 I 1 I 1 [ 1 ( I E 1 <br /> Definition of Terms <br /> na Not Analyzed in QC batch <br /> SA Spike Added <br /> SR Sample Result <br /> RPD{/o) 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 />