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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# GBG2981215 Date Analyzed 12/15/98 <br /> Matrix Water Quality Control Sample Blank Spike <br /> Units pg/L <br /> PARAMETER Method# • MB SA • SR SP SP SPD SPD RPD QC LIMITS <br /> Pg/L 14g/L ' µg/L µ9/L % R µg/L %R RPD %R <br /> Benzene 8020 1 <0 50 1 40 <br /> E 1 ND 39 1 97 I 37 1 91 55 1 25 1 76-112 1 <br /> 1 1 i 1 1 1 1 1 1 1 1 1 <br /> 1 1 1 t 1 1 1 1 1 ! <br /> ;Toluene 8020 <0 50 ; 40 ; ND ; 39 98 ; 37 94 ; 4 7 !; 25 ; 78-111 ; <br /> 1 1 1 1 1 ! 1 1 1 ! 1 l <br /> 'Ethyl Benzene 1 8020 <0 50 40 ND 40 100 38 95 4 4 25 77-114 <br /> 1 1 1 1 1 1 <br /> 1:Xylenes 8020 1 <0 50 1 120 1 ND 1 121 1 101 I 115 1 96 1 4 5 1 25 1 78-114 I <br /> ;Gasoline 8015 1 <50 0 1 500 1 ND 1 450 90 422 84 1 6 5 1 1 <br /> ! 1 1 1 i I 1 25 71-115 , <br /> I <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 /> I <br /> I <br /> I ' <br /> I <br /> I I <br /> I I I I I <br />