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i <br /> ntech Analytical Labs, Inc 525 Del Rey Avenue, Suite E <br /> Sunnyvale, CA 94086 <br /> QUALITY CONTROL RESULTS SUMMARY <br /> METHOD Gas Chromatography <br /> QC Batch # GBG2980313 Date Analyzed 03/13/98 <br /> Matrix Water Quality Control Sample E5073 <br /> Units uglL <br /> QC LIMIfiS <br /> PARAMETER Method# MB SA SR SP SP SPD SPD RPD <br /> (ADVISORY) <br /> ug/L ug/L ug/L ug/L %R uglL %R RPD %R <br /> rBenzene 1 8020 1 <0 50 t 80 ND i —T6---r, --95 t 76 95 t 0 9 t 25 r 50-150 r <br /> :Toluene : 8020 : <0 50 : 80 : ND : 74 : 92 : 74 1 93 1 0 6 : 25 : 50-150 : <br /> E E 1 t 1 1 t r 1 r r r <br /> :Ethylr <br /> Benzene t 8020 1 <0 50 t 80 1 ND 1 74 t 92 t 74 1 92 1 0 1 t 25 1 50-150 r <br /> jXylenes 8020ND 240 t <0 50 t 1 <br /> r t 1 1 214 t 89 t 218 1 91 t 2 1 t 25 f 50-150 E <br /> :Gasoline : 8015 : <50 0 : 1000 : ND : 900 : 90 : 920 : 92 : 2 2 : 25 : 50-150 : <br /> � t 1 t r 1 t t 1 i 1 i w <br /> Note LCS and LCSD results reported for the following Parameters <br /> None <br /> Acceptable LCS and LCSD results are reported when matrix interferences cause MS and MSD results to fall outside <br /> established QC hnuts <br /> �eflmtion 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 />