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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 Oras Chromatography <br /> QC Batch# GBG2980317 Date Analyzed 03/17/48 <br /> Matrix Water Quality Control Sample E5306 <br /> Units ug1L <br /> QC LIMITS <br /> PARAMETER Method# MB SA SR SP SP SPD SPD RPD (ADVISORY) <br /> ug/L ug/L ug/L uglL % R ug/L %R RPD %R <br /> ,Benzene i 8020 i <0 50 i 40 i ND i 36 i 90 i 43 i 107 i 175 t 25 i 50-150 i <br /> Toluene i 8020 : <0 50 : 40 i ND i 35 88 42 i 104 : 174 : 25 50-150 <br /> i e i i i i i i t i i <br /> �tEthyl Benzene i 8020 1 <0 50 t 40 + ND 1 35 i 88 i 40 i 100 i 12 3 1 25 t 50-150 i <br /> Xylenes 8020 i <0 50 i 120 ND i 103i i r r <br /> i 86 i 112 i 94 i 8 5 i 25 i 50-150 t <br /> :Gasoline : 8015 i <50 0 500 : ND : 435 87 : 505 : 101 : 15 0 : 25 50-150 <br /> � i i i i � i i r i � <br /> Note LCS and LCSD results reported for the following Parameters <br /> None <br /> AccepraNe LCS and LCSD results are reported when inatnx interferences muse MS and MSD residis to fall outside <br /> established QC liners <br /> bfinition 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 /> 1 <br />