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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- Volatile Organics <br /> Laboratory Control Spikes <br /> QC Batch# VOC 1 W990917 Date Analyzed 09/17/99 <br /> Matrix Water Quality Control Sample Blank Spike <br /> Units g/L <br /> PARAMETER Method# ; SA SR SP SP SPD SPD RPD QC LIMITS <br /> /L /l g/L % R /L %R % RPD %R <br /> .Benzene ; 602/8020 ; 40 ; ND ; 39 ; 98 42 ; 104 ; 62 ; 25 76-131 ; <br /> .Chlorobenzene 601/8010 40 . ND 39 . 97 . 40 99 26 1 25 ; 83-115 <br /> t t 1 t f t <br /> 11,1-Dtchloroethane 601/8010 40 ND 43 . 108 45 112 3 9 25 . 81-137 <br /> t t t t t , <br /> Toluene .602/8020 40 ND 37 93 38 95 2 1 25 80-120 <br /> t t t t t t <br /> ;Trichloroethene ; 601/8010 ; 40 ; ND ; 41 ; 101 ; 44 ; 109 7 1 ; 25 ; 43-163 <br /> Bromochlormethane ' <br /> 601/8010 ; 113% ; 99% ; 97% ; ; ; 65-135 ; <br /> t t t t t t t t t <br /> .Fluorobenzene ; 602/8020 ; ; 113% ; 104% ; 108% 65-135 ; <br /> . . <br /> i <br /> Definition of Terms <br /> na Not Analyzed in QC batch <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 Duplicate%Recovery <br /> NC Not Calculated <br />