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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# GBG4981106 Date Analyzed- 11/06/98 <br /> Matrix Water Quality Control Sample Blank Spike <br /> Units <br /> PARAMETER Method# MB SA SR SP SP SPD SPD RPD QC LIMITS <br /> %R %R RPD I %R <br /> lig/L �LWL _ �](Benzene t 8020 1 <0 50 : 40 t ND 1 39 I 97 1 40 s 99 t 20 i 25 177-115 : <br /> ;Toluene i 8020 ; <0 50 1 40 I ND I 37 94 1 39 1 98 1 44 1 25 t 76-115 1 <br /> !Ethyl Benzene 1 8020 t <0 50 1 40 1 ND 1 38 t 95 1 40 1 99 1 40 1 25 1 77-115 1 <br /> :Xylenes i 8020 i <0 50 1 120 1 ND 1 118 1 98 ! 120 : 100 1 14 : 25 i 77-117 1 <br /> ;Gasoline i 8015 i <50 0 500 ND i 521 i 104 537 107 3 1 25 67-134 <br /> Note LCS and LCSD results reported for the following Parameters <br /> .411 <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 Terris <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 /> i <br /> 1 <br /> 1 <br />