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Entech Analytical Labs,Inc 525 Del Rey Avenue,Suit <br /> Sunnyvale,CA 94086 <br /> QUALITY CONTROL RESULTS SUMMARY <br /> ' METHOD Gas Chromatography <br /> ' QC Batch# GBG2990527 Date Analyzed 05/27/99 <br /> Matrix Water Quality Control Sample Blank Spike <br /> Units gg/L <br /> ' PARAMETER Method# MB SA SR SP SP SPD SPD RPD QC LIMITS <br /> Ag/L gg/I, µg(L µg/L % R 3083 %R RPD: %R. <br /> ' 'Benzene ; 8020 ; <0 50 ; 45 ; ND ; 48 ; 107 ; 45 ; 100 ; 65 ; 25 ; 80-114 1 <br /> 1 1 1 1 I 1 1 1 1 I 1 1 <br /> 11 oluene 8020 1 <0 50 25 0 ND 236 94 243 97 2 9 25 82-113 <br /> ;Ethyl Benzene ; 8020 ' <0 50 ; 45 ' ND ; 4 9 ; 109 ' 5 0 111 2 0 ; 25 77-114 ; <br /> ;Xylenes; 8020 ' <0 50 ' 25 0 1 ND 254 ' 102 ' 262 ' 105 3 I 1 25 ' 84-116 <br /> 1 1 1 1 1 1 1 1 1 1 1 1 1 <br /> ;Gasoline 8015 <50 0 500 ND 504 101 504 101 0 0 25 75-125 ; <br /> laaa-TFT(SS)-PID 8020 103% 99% 101% 65-135 <br /> aaa-TFT(SS)-FID 8015 1 100% 100% l02% 65-135 <br /> Note LCS and LCSD results reported for the following Parameters <br /> ' ,411 <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 Analysts-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 /> 1 <br />