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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-Volatile Organics <br /> QC Batch#: VOC2S980616 Date Analyzed: 06/16/98 <br /> Matrix: Soil Quality Control Sample: Blank Spike <br /> Units: <br /> PARAMETER Method# SA SR SP SP SPD SPD RPD QC LIMITS <br /> R %R RPD i %R <br /> Benzene 1 8020 1 40 i ND i 39 1 99 i 39 1 98 1 1.0 1 25 1 87-112 i <br /> Chlorobenzene 8010 40 ND 41 102 38 96 6.3 25 77-121 <br /> 1,1-Dichloroethane 8010 40 ND lf 44 109 41 102 6.2 25 74-125 <br /> Toluene 8020 40 ND 40 100 40 100 0.3 25 86-113 <br /> Trichloroethene 8010 40 i ND i 40 i 101 i 37 i 92 i 8.8 i 25 i 72-131 <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 /> 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 Duplicate%Recovery <br /> NC: Not Calculated <br />