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1 . <br /> 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#: GBG2981207 Date Analyzed: 12//07/98 <br /> Matrix: Water Quality Control Sample: Blank Spike <br /> ' Units: L <br /> PARAMETER Method# MB SA SR SP SP SPD SPD RPD QC LIMITS <br /> Ng/( % R %R RPD i %R <br /> 'Benzene 8020 i <0.50 i 40 I ND i 39 i 98 I 37 i 94 i 4.4 i 25 i 76-112 1 <br /> 'Toluene I 8020 I <0.50 ' 40 I ND I 39 ' 97 1 38 ' 95 k I 2.3 ' 25 ' 77-112 ' <br /> 1 I I I I I 1 I I I I 1 <br /> (Ethyl Benzene I 8020 1 <0.50 I 40 I ND I 39 I 98 I 38 I 95 I 2.8 I 25 1 76-114 I <br /> ' Xylenes 8020' I <0.50 I 120 I ND I 118 I 99 I 115 I 96 I 2.7 I '25 I 77-115 <br /> I I I I I I I I I I I I <br /> !Gasoline ! 8015 ! <50.0 ! 500 I ND I 443 I 89 I 382 I 76 I 14.7 1 25 I 75-112 <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 /> r <br /> 1 <br /> i <br /> 1 <br /> r <br />