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Entech AnalyticalLabs,Inc. 525 Del Rey Avenue;Suite E <br /> Sunnyvale,CA 94086 <br /> ,QUALITY CONTROL RESULTS SUMMARY <br /> METHOD: Gas Chromatography <br /> Laboratory Control Sample <br /> QC Batch#: SGC4000420 Date Analyzed: 04/20/00 <br /> Matrix: Solid Quality Control Sample:.Blahk Spike <br /> Units. Ptg/kg <br /> PARAMETER :` .Method 4 i MB "SA :SR SP.. € SP, SPD € 'SPD _ % QC LIMITS <br /> $ g lag 14g/kSlxg�g _% R .:.lig�g. %R' RPD _RPD %R- <br /> Benzene 1 8020 <5.0 1 4.7 1 ND 4.8 101 5.2 . 149 7.6 1 25 80-120 <br /> 1 <br /> Toluene 8020 <5.0 1 29 ND 1. 29 1 100 1. 29 100 0.0 25 80-1.20 . <br /> _Ethyl Benzene 8020 <5.0 . 5.6 ND 5.4 97 5.6 101 3.7 25 .80-120 <br /> ;Xylenes ; 8020 <5.0 32 ; ND 32 100 33 101 0.9 25 80-120 1 <br /> ;Gasoline 8015 . <1000 469 ND. ; 499. 1 107 ; 468. ; 100 ; 6.4 25 75-115 <br /> aaa-.TFT(S.S)-FID 80.15 115% 109% 106% 65-135 <br /> aaa-TFT(S.S.)P1D 1 8020 110%° 110% 103% 65-135 <br /> 1,J . <br /> Definition of-Terms: <br /> ha: Nof Analyzed in QC batch <br /> MB Method Blanks. <br /> SA: Spike Added <br />{ <br /> SR: Sample Result <br /> :•RPD(%): Duplicate Analysis=Relative Percent Difference <br /> SP: Spike.Res4lt <br /> SP(%R): Spike%Recovery <br /> SPD: Spike Duplicate Result <br /> SPD,(%R): .Spike%'Recovery <br /> NC: Not Calculated <br /> Ll <br /> f <br /> Lr <br />