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,*tech Analytical Labs,Inc. 525 Del Rey Avenue,Suite E <br /> Sunnyvale,CA 94086 <br /> QUALITY CONTROL RESULTS SUMMARY <br /> METHOD: Gas Chromatography <br /> Laboratory Control Sample <br /> QC Batch#: GBG4991214 Date Analyzed: 12/14/99 <br /> ' Matrix: Liquid Quality Control Sample: Blank Spike <br /> Units: l.tg/Liter <br /> PARAMETER Method# MB SA SR SP SP SPD SPD % QC LIMITS <br /> µg/Liter µg/Liter gg/Liter µg/Liter ; % R µg/Liter %R RPD ', RPD %R <br /> ;Benzene 1 8020 j <0.50 5.6 ND 5.3 94 ; 4.8 ; 86 ; 9.7 25 70-130 ; <br /> ;Toluene 8020 <0.50 31 ND 32 )Of 28 89 12.7 25 70-130 <br /> ;Ethyl Benzene 8020 <0.50 6.1 ND 5.6 92 ' 5.3 87 5.7 25 70-130 <br /> ' !Xylenes 8020 <0.50 1 35 ND 33 95 31 1 89 7.2 ! 25 l 70-130 <br /> Gasoline 8015 <50.0 1 500 ND 478 96 435 1 87 1 9.6 25 70-130 <br /> laaa-TFT(S.S.)-FID 8020 ; 101% 104% 97% 65-135 <br /> ,aaa-TFT(S.S.)-PID ', 8015 111% 111% 111% 65-135 <br /> loinition <br /> 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 0 <br />