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wtech,knalytical Labs,Inc 525 Del Rey Avenue,Suite E <br /> Sunnyvale,CA 94036 <br /> QUALITY CONTROL RESULTS SUMMARY <br /> METHOD Gas Chromatography <br /> QC Batch# GBG5970626 Date Analyzed 06/26/97 <br /> Matrix Water Quality Control Sample Blank Spike <br /> Umts Eig/L <br /> QC LIMITS <br /> PARAMETER Method# MB SA SR SP SP SPD SPD RPD (ADVISORY) <br /> K8/- 991L jig/L- 1152 %R gg/L %R RPD 1 "/oR <br /> (Benzene 1 8020 1 <05 1 25 i ND I 336 1 134 I 28 8 1 115 1 153 I 25 ! 50-150 t <br /> :Toluene 1 8020 <0 5 I 25 ND 23 9 ! 96 I 24 8 1 99 38 I 25 50-150 : <br /> I I 1 1 1 ! 1 I I I ! I <br /> :Ethyl Benzene I 8020 1 <05 ! 25 ' ND ' 23 9 ' 96 ' 23 1 1 92 ' 34 ' 25 ' 50-150 <br /> Xylenes 1 8020 1 <05 1 75 1 ND 1 68 1 91 1 68 i 91 I 00 ! 25 ! 50-150 1 <br /> Gasoline8015: : 1 I 1i <br /> 1 I <50 0 � 625 1 ND 672 1 108 1 593 I 95 I 125 1 25 1 50-150 I <br /> 0 <br /> Definition of Terms <br /> na Not Analyzed 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 />