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Entech Analytical Labs, Inc 525 Del Rey Avenue,Suite E <br /> Sunnyvale,CA 94086 <br /> QUALITY CONTROL RESULTS SUMMARY <br /> METHOD Gas Chromatography <br /> QC Batch# GBG2990120 Date Analyzed 01/20/99 <br /> Matrix Water Quality Control Sample Blank Spike <br /> Units µg/L <br /> . : <br /> PARAMETER ; Method# : MB SA SR SP SP SPD SPD RPD QC LIMITS <br /> µms- WL µg- µlm- <br /> %R : µg/i. %R ; RPD 1 %R <br /> Benzene 1 8020 <0 50 40 ND 40 1 100 39 97 1 3 2 1 25 1 75-116 1 <br /> 1 1 i i 1 1 1 i 1 1 1 1 7 <br /> 1 1 1 1 1 1 [ 1 1 1 1 1 <br /> (Toluene 1 8020 1 <0 50 1 40 1 ND 1 40 1 100 39 1 98 1 1 1 1 25 1 76-116 T 1 <br /> 1 <br /> Ethyl Benzene 8020 <0 50 40 ND 40 99 39 97 2 0 25 80-113 <br /> 1 <br /> 'Xylenes 8020 1 <0 50 1 120 ND 120 1 100 120 100 1 0 4 25 79-115 I <br /> ,Gasoline 1 8015 <50 0 1 500 1 ND 538 1 108 1 600 1 120 1 108 1 25 1 76-127 1 <br /> 1 1 i 1 1 1 7 1 i 1 1 1 1 <br /> Note LCS and LCSD results reported for the following Parameters <br /> .411 <br /> Acceptable LCS and LCSD results are reported when matrzx interferences cause MS and MSD results to fall outs'de <br />� .established QC limits <br /> Definition of Terms <br /> na Not Analyzed in QC batch <br /> MB Method Blank <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%Recovery <br /> NC Not Calculated <br />