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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#: GBG4980619 Date Analyzed: 06/19/98 <br /> Matrix: Soil Quality Control Sample: E 11478 <br /> Units: ug/kg <br /> PARAMETER Method# MB SA SR SP SP SPD SPD RPD QC LIMITS <br /> u u u u %R u %R RPD i %R <br /> :Benzene : 8020 : <5.0 : 80 : ND : 98 : 123 : 81 : 102 : 18.8 : 25 : 76-117 : <br /> Toluene 8020 <5.0 80 ND 75 94 82 103 8.4 25 76-117 <br /> :Ethyl Benzene 8020 <5.0 80 ND 72 90 82 102 12.1 25 74-119 <br /> :Xylenes : 8020 : <5.0 : 240 : ND : 218 : 91 : 254 : 106 : 15.1 : 25 : 75-120 : <br /> Gasoline i 8015 <1000.00 i 1000 i ND i 1140 i 114 i 1070 i 107 i 6.3 i 25 i 58-120 <br /> Note: LCS and LCSD results reported for the following Parameters: <br /> Gasoline <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(%R): Spike%Recovery <br /> NC: Not Calculated <br />