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rntech Analytical Lab Inc <br /> y s, c _ 52� Del Rey Avenue,Suite E <br /> I Sunnyvale,CA 94486 <br />` QUALITY CONTROL RESULTS SUMMARY <br /> METHOD Gas Chromatography <br /> QC Batch# GBG4990126 Date Analyzed 01/26/99 <br /> I Matrix Water Quality Control Sample Blank Spike <br /> Units pg/L <br /> : <br /> PARAMETER Method# MB SA SR SP SP SPD SPD RFD QC LIMITS <br /> I 119/L µ1/ 1ig/L µg/L % R teg/L %R RPD %R <br /> Benzene 8020 <0 50 40ND 34 85 35 1 87 29 1 25 1 81-113 1 <br /> 1 1 1 1 1 1 <br /> 1 1 1 1 1 1 1 ! <br /> ;Toluene ; 8020 ; <0 50 ; 40 ND 1 1 1; 34� ; 85 ; 34 86 ; 11 1 25 ; 79-113 ; <br /> 1 1 1 1 1 1 1 1 1 1 <br /> IEth�I Benzene 1 8020 I <0 50 40 ND 1 1 1 1 34 1 84 34 1 86 I 21 1 25 80-114 ; <br /> 1 1 1 1 1 1 1 1 1 1 1 1 i <br /> 'Xylenes 1 8020 1 <0 50 1 120 1 ND 1 102 I 85 1 104 1 87 1 3 I 25 1 80-115 ; <br /> ( 1 1 1 1 1 1 1 i 1 1 1 <br /> I IGasoline ; 8015 ; <50 0 500 ND ; 451 ; 90 554 ; 111 ; 205 ; 25 ; 77-112 ; <br /> Note LCS and LCSD results reported for the following Parameters <br /> All <br /> cceptable LCS and LCSD results are reported when matrix interferences cause iVS and MSD results to fall outside <br /> tablished QC hmits <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) Spice%Recovery <br /> NC Not Calculated <br />