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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## VOC1 W990918 Date Analyzed 09/18/99 <br /> Matrix Water Quality Control Sample Blank Spike <br /> Units /L <br /> PARAMETER Method# ; SA SR SP SP SPD SPD RPD QC LIMITS <br /> L 4g/L L % R L %R % RPD %R <br /> ,Br , , r a r i , i , , , <br /> 'Benzene , 602/8020 , 40 ND 39 98 43 107 r 8 3 25 r 76-131 , <br /> 1Chlorobenzene 1 601/8010 1 40 ND 39 1 98 1 39 96 1 21 25 83-115 <br /> 11 1-Dichloroethane 601/8010 1 40 ND 1 41 1 103 44 110 1 6 6 25 81-137 <br /> r , , , , , e , e , , <br /> ;Toluene 602/8020 1 40 ND ; 39 1 97 38 94 2 9 25 80-120 <br /> `Trichloroethene601/8010 40 ND 38 96 45 112 15 9 25 43-163 ` <br /> , r r r r � r r , <br /> ;Bromochlormethane 601/8010 ; 112% ; 91% 99% ; ; ; 65-I35 ; <br /> ;Fluorobenzene 602/8020 ; 112% ; 101% ; 112% 65-135 <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 />