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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 <br /> QC Batch# GBG2981106 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 LMTS <br /> R %R RPD I %R <br /> (Benzene : 8020 1 <0 50 1 40 1 ND 1 41 1 102 1 43 1 106 1 40 1 25 s 78-112 1 <br /> ,Toluene , 8020 , <0 50 , 40 , ND , 41 1 102 , 41 [ 103 , 17 1 25 1 80-111 , <br /> I ! 1 1 1 [ i I 1 I I 1 <br /> :Ethyl Benzene 1 8020 : <0 50 1 40 1 ND 1 43 1 106 1 44 1 111 1 41 1 25 1 79-115 1 <br /> I 1 1 1 1 1 ! 1 I [ I 1 1 <br /> :Xylenes 1 8020 1 <0 50 1 120 1 ND 1 124 1 103 1 127 1 106 1 21 1 25 1 80-116 1 <br /> 1 1 1 :1 I 1 i :i 1 [ 1 <br /> (Gasoline 1 8015 1 <50 0 1 i 500 : ND 500 i 100 i 521 ', 104 41 1 25 1 66-124 1 <br /> Note LCS and LCSD results reported for the following Parameters <br />' All <br /> i <br /> I <br /> 1 • Acceptable LCI 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 /> I 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 Duphcate Result <br /> SPD(%R) Spike%Recovery <br /> NC Not Calculated <br /> I <br />