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1,&ech Analytical Labs,Inc. 525 Def Rey Avenue,Suite E <br /> Sunnyvale,CA 94086 <br /> QUALITY CONTROL RESULTS SUMMARY <br /> METHOD:Gas Chromatography <br /> Laboratory Control Sample <br /> QC Batch#: WGC4000330A Date Analyzed: 03/30/00 <br /> Matrix: Liquid Quality Control Sample: Blank Spike <br /> ' Units: Vg/Liter <br /> PARAMETER Method# MB SA SR SP SP € SPD SPD % QC LIMITS <br /> µg/Liter gg/Liter i., µg/Liter µg/Liter %R µg/Liter %R RPD RPD %R <br /> ' ;Benzene 8020 <0.50 ; 4.7 1 ND 5.0 1 105 5.2 110 4.1 25 70-130 ; <br /> :Toluene 8020 <0.50 29 1 ND 27 94 31 105 11.0 25 70-130 , <br /> ;Ethyl Benzene 8020 <0.50 5.5 1 ND 5.3 96 5.$ 105 9.4 25 70-130 <br /> 'Xylenes 1 8020 <0.50 1 32 1 ND 1 30 96 34 107 10.5 25 ' 70-130 <br /> ;Gasoline 8015 <SOA 1 467 1 ND 1 467 t 100 480 1 103 2.8 25 70-130 <br /> ;aaa-TFT(S.S.)-FID 8020 1 114% 114% 115% 65-135 <br /> ;aaa-TFT(S.S.)-PID ; 8015 1 111% 102% 104% 65-135 <br /> �fmition 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 /> 1 <br /> 1 . <br /> 1 <br /> • <br /> 1 <br />