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Entech Analytical Labs, Inc 525 Del Rey Avenue,Suit <br /> i Sunnyvale,CA 94086 <br /> QUALITY CONTROL RESULTS SUMMARY <br /> METHOD Gas Chromatography <br /> QC Batch# GBG4990324A Date Analyzed 03/24/99 <br /> Matrix Water Quality Control Sample Blank Spike <br /> Units µg/L <br /> PARAMETER Method# MB SA SR SP SP SPD SPD RPD QCILIMITS <br /> Pg/L Ila I�I�L %R 11I�L %R RPD 1 %R <br /> .Benzene 1 8020 <0 50 40 . ND 1 37 ; 93 ; 38 1 94 . 10 1 25 1 83-109 <br /> I t 1 7 i 7 <br /> ;Toluene 8020 <0 50 40 ND 38 94 38 96 20 1 25 79-112 <br /> .Ethyl Benzene; 8020 ; <0 50 ; 40 ; ND . 37 1 94 ; 37 ; 93 ; 1 2 25 82-110 ; <br /> I I <br /> 'Xylenes 1 8020 . <0 50 ; 120 1 ND 1 115 1 96 1 115 1 96 . 0 1 25 . 83-110 1 <br /> i i t 1 1 <br /> Gasolinet , <br /> 80I5 1 <50 0 1 500 ND 520 ; 1.04 534 107 1 2 6 25 1 72-127 ; <br /> Note LCS and LCSD results reported for the following Parameters <br /> 1411 <br /> I <br /> Ila <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 />