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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# GBG2981228 Date Analyzed 12/28/98 <br /> Matrix Water Quality Control Sample Blank Spike <br /> Units ug(- <br /> 1 , <br /> PARAMETER Method# MB SA SR SP SP SPD SPD RPD QC LIMITSggll, µg/L gg/L µg/I. % R Fig/`- %R RPD I %R <br /> .Benzene 8020 <0 50 . 40 ND I 36 . 90 . 39 97 72 25 . 76-112 <br /> (Toluene 8020 I <0 50 40 ND 36 90 38 96 66 25 1 78-112 I <br /> ;Ethyl Benzene . 8020 I <0 50 . 40 1 ND . 37 1 92 39 . 98 54 1 25 1 77-114 <br /> 'Xylenes • 8020 • <0 50 • 120 1 ND • 109 • 91 . 119 • 99 • 8 2 • 25 • 78-i 14 <br /> y 1 <br /> 1Gasoline 8015 I <50 0 500 ND 455 1 I 91 I 445 89 22 25 71-114 ; <br /> Note LCS and LCSD results reported for the following Parameters <br /> ' All <br /> Acceptable LCS and LCSD results are reported when matrix interferences cause MS and MSD results to fall outside <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 /> y <br />