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ntech 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#: GBG4981208 Date Analyzed: 12/08/98 <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 /> pg/L L L % R %R RPD i %R <br /> ' ,Benzene 8020 4 <0.50 i 40 ND i 37 i 93 i 37 i 92 i 0.9 E 25 , 85-108 , <br /> (Toluene 8020 <O.SO 40 ND 36 91 37 92 k 1.3 25 85-108 t <br /> i i i i i i t i i <br /> Ethyl Benzene i 8020 i <0.50 i 40 i ND i 37 93 38 94 i i i 1.5 i 25 i 86-107 i <br /> ' ,X ienes .50 120 ND 111 93 113 94 l.3 25 j 87-108 <br /> i 8020 <0 <br /> Y i j i i R i <br /> 'Gasoline 8015 { <50.0 i 500 ! ND ! 510 i 102 ! 493 ! 99 3.4 25 i 82-128 <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 /> v <br />