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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# WGC4A000125 Date Analyzed 01/25/00 <br /> Matrix Liquid Quality Control Sample Blank Spike <br /> Units 49/Liter <br /> PARAMETER Method# MB SA SR SP SP SPD SPD % QC LIMITS <br /> µg/Liter pg/Liter jig/Liter µg/Liter % R µ. -iter %R RPD RPD %R <br /> Benzene 8020 <0 50 56 ND 48 85 45 80 63 25 70-130 <br /> ;Toluene ; 8020 <0 50 31 ; ND ; 28 88 29 ; 93 56 ; 25 70-130 <br /> ;Ethyl Benzene 8020 ; <0 50 ; 6 1 ND ; 54 89 ; 5 6 92 ; 3 6 ; 25 ; 70-130 1 <br /> ;Xylenes 8020 <0 50 ; 35 ; ND 1 31 ; 89 l 32 l 92 ; 14 1 25 70-130 l <br /> Gasoline <br /> ' 8015 ; X50 0 1 464 93 457 91 1 16 25 70-130 <br /> ; 500 ND i <br /> ;aaa-TFT(S5)-F1D 8020 120% 117% 120% 65-135 <br /> laao-TFT(SS)-PID ; 8015 ; 111% 118% 100% 65-135 <br /> muton of Terms <br /> na Not Analyzed m 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 Spil.e Duplicate Result <br /> SPD(%R) Spike%Recovery <br /> nc Not Calculated <br /> • <br />