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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 <br /> QC Batch#: GBG490806 Date Analyzed: 08/06/97 <br /> Matrix: Soil <br /> Quality Control Sample: D12386 <br /> Units: ug/kg <br /> QC LIMITS <br /> PARAMETER Method MB I SA SR SP SP SPD 1 SPD RPD (ADVISORY) <br /> I u j u u u % R u ! %R RPD i %R <br /> ' iBenzene i 8020 1 <5.0 i 80 i ND i 102 1 128 1 98 1 123 1 3.8 i 25 i 50-150 i <br /> :Toluene i 8020 <5.0 80 i ND i 100 126 98 i 122 i 2.7 i 25 i 50-150 i <br /> !Ethyl Benzene 8020 <5.0 80 ND 98 122 96 120 1.5 25 50-150 <br /> ' Xylenes 1 8020 1 <5.0 i 240 1 ND 1 294 1 123 1 290 1 121 1 1.5 1 25 1 50-150 i <br /> Gasoline i 8015 : <1000.00 i 1000 i NO i 910 i 91 : 900 : 90 i 1.1 25 50-150 <br /> i <br /> ' Nate: 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 limits. <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(°/oR): Spike%Recovery <br /> NC: Not Calculated <br />