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otech 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# WGC1000126 Date Analyzed 01/26/00 <br /> Matrix Liquid Quality Control Sample Blank Spike <br /> Units pg/Liter <br /> PARAMETER Method# MB SA SR SP SP SPD SPD RPD QC LIMIT <br /> gg/Liter pg/Liter pg/Liter pg/Liter % R pg/Liter %R RPD '-_ /.R71 <br /> 8020 , ; <br /> Benzene � 1 <0 50 5 .. � N D � 4 8 � 93 � 4 6 � 88 ! 5 7 1 25 � 73-[2 <br /> t !Toluene 8020 1 <0 50 1 290 1 ND 1 28 1 97 1 27 1 93 1 3 9 25 1 84-112 1 <br /> ;Ethyl Benzene 8020 <0 50 5 7 ND 1 57 100 1 55 1 97 1 3 2 25 1 77-115 <br /> ;Xylenes 8020 <0 50 301 ND 133 108 31 1 103 4 7 ! 25 87-121 <br /> 1 <br /> ;Gasoline 8015 <50 0 500 ND 1 534 ; 107 1 489 1 98 ! 8 8 25 74-122 ; <br /> �aaa-TFT(SS)-PID 8020 105% 103% 104% 65-135 <br /> �aaa-TFT(SS)-FID 8015 111% 107% 107% 65-135 <br /> f nrtion of Terms <br /> na Not Analyzed in QC batch <br /> MB Method Blank <br /> SA Spike Added <br /> SR Sample Result <br /> RPD('/o) 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 />