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Entecb Analytical Labs,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# GBG4990720 Date Analyzed 07/20/99 <br /> Matrix Water Quality Control Sample Blank Spike <br /> Units gg/Llter <br /> PARAMETER Method# MB SA SR SP SP SPD SPD % QC LIMITS <br /> ug/Liter ug/Liter µ4Liter ltg/Liter % R gg/Liter %R RPD RPO %R <br /> ;Benzene 8020 <0 50 ; 40 ND 39 99 ; 39 97 2 0 25 70-130 <br /> ;Toluene 8020 <0 50 40 NO 39 99 40 99 07 25 70-130 <br /> ;Ethyl Benzene 8020 <0 50 40 ND 41 102 ; 39 98 3 8 25 70-130 <br /> 1Xylenes 8020 <0 50 i120 ND 123 102 120 100 2 0 1 25 70-130 <br /> Gasoline <br /> 8015 1 <Sq 0 i 500 ; ND ; 553 111 ; 524 ; 105 ; 53 ; 25 70-130 i <br /> ;aaa-TFT(SS)-P1D 1 8020 91°/0 9503 920a 65-135 <br /> ;aaa-FFT(SS)-FID 8015 94010 91°) 91% 65-135 <br /> Definition of Terms <br /> na Not Analvzed 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 />