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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# HexaneW980708 Date analyzed 07/08/98 <br /> Matrix Water Spiked Sample E 12445 <br /> Units <br /> PARAMETER Method# SA <br /> [_L�RLSP SP SPD SPD RPD QC LIMITS <br /> %R %R RPD 1 %R <br /> I�iexane 1 624 1 20 I ND I 14 I 97% I 21 I 104% I 75 I 251 <br /> 70-130 I <br /> IHc cane 1 624 1 20 1 ND 1 17 1 85% 1 18 1 90% 1 63 1 25 1 70-130 1 <br /> i P 1 I I I 1 I I I I I I <br /> IMethylcyclohexane 1 624 1 20 1 ND 1 19 1 93% 1 20 1 99% 1 68 1 25 1 70-130 1 <br /> i I I 1 I I I 1 1 l I 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 /> r <br />