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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#: GBG2980618 Date Analyzed: 06/18/98 <br /> Matrix: Water Quality Control Sample: Blank Spike <br /> Units: u <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 /> iBenzene i 8020 i <0.50 1 80 1 ND 1 79 1 99 1 78 1 97 1 1.7 1 25 1 77-111 1 <br /> Toluene 1 8020 <0.50 80 ND 81 101 79 98 2.2 25 78-111 <br /> :Ethyl Benzene : 8020 : <0.50 : 80 ND : 81 101 81 : 101 0.7 25 : 78-112 : <br /> iXylenes i 8020 1 <0.50 1 240 1 ND 1 241 1 100 1 246 1 103 1 2.2 1 25 1 79-112 1 <br /> :Gasoline i 8015 : <50.0 : 1000 : ND : 890 : 89 : 920 : 92 : 3.3 i 25 i 59-126 <br /> i <br /> Note: LCS and LCSD results reported for the following Parameters: <br /> All <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 />