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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#: VOC2W980616 Date Analyzed: 06/16/98 <br /> Matrix: Water Quality Control Sample: E11479 <br /> Units: <br /> PARAMETER Method# SA SR SP SP SPD SPD RPD QC LIMITS <br /> R %R RPD 1 %R <br /> (Benzene I 602 1 40 1 ND 1 41 1 103 1 41 1 102 1 1.2 1 25 I 87-109 1 <br /> 1Chlorobenzene 1 601 1 40 1 ND 1 40 1 99 1 38 I 95 1 4.6 I 25 1 76-120 1 <br /> I I I 1 1 1 I I I I I I <br /> 11,1-Dichloroethane 1 601 I 40 1 ND I 39 1 97 I 41 1 103 1 6.0 1 25 I 73-124 1 <br /> I I I I I I I I I I I I <br /> 1Toluene I 602 I 40 I ND I 40 I 101 1 41 I 101 1 0.2 1 25 I 86-110 1 <br /> I I I I I I I I I I I I <br /> 1Trichloroethene 1 601 1 40 I ND 1 38 I 96 1 38 I 96 1 0.5 1 25 I 69-130 1 <br /> I I I I I I I 1 I I I I <br /> I I 1 I 1 1 I 1 1 I I 1 <br /> Note: 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 /> 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 />