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Entech Analytical Labs,Inc <br /> 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# WGC4000403A Date Analyzed 04/03/00 <br /> Matrix Liquid Quality Control Sample Blank Spike <br /> Units µg/Liter <br /> PARAMETER Method# MB SA SR SP SP SPD SPD % QC LIMITS <br /> µg/Litcr pg/Liter 4g(Lrter µg/Liter % R pg/Liter %R RPD RPD %R <br /> Benzene ; 8020 ; <0 50 ; 4 7 ; ND ; 5 3 114 ; 4 6 ; 98 ; 14 6 25 ; 70-130 ; <br /> 8020 <br /> ;Toluene ; ; <0 50 ; 29 ; ND 28 ; 95 ; 29 ; 98 ; 2 6 ; 25 70-130 <br /> ' , <br /> ;Ethyl Benzene 8020 <0 50 5 S ND 5 5 101 ; 5 4 48 <br /> 2 4 25 70-130 , <br /> [Xylenes 8020 <0 50 i 32 1 ND 1 31 98 31 1 98 0 6 1 25 70-130 <br /> !Gasoline 8015 <50 0 467 ND 481 103 456 1 1 <br /> 98 54 1 25 1 70-130 <br /> laaa-TFT(SS)-FID 8020 112% 118% 112% 65-135 <br /> :aaa-TFT(SS)-PID 8015 104% 107% 101% 65-135 <br /> Definition of Terms <br /> na Not Analyzed in QC batch <br /> MB Method Blank <br /> SA Spice Added <br /> SR Sample Result <br /> RPD(%) Duplicate Analysis-Relative Percent Difference <br /> SP Spice Result <br /> SP(%R) Spice%Recovery <br /> SPD Spike Duplicate Result <br /> SPD(%R) Spice%Recovery <br /> nc Not Calculated <br />