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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# WGC4000726 Date Analyzed 07/26!00 <br /> Matrix Liquid Quality Control Sample Blank Spike <br /> Units ug/Liter <br /> PARAMETER Method# MB SA SR SP SP SPD SPD % QC LIMITS <br /> }LwLiter uz Liter ug/Liter 4Q1L,ter % R ugtLiter %R RPD ; RPD %R <br /> ;Benzene 8020 <0 SU 5 2 ND b 0 115 6 2 119 3 4 25 ; 70-130 <br /> ;Toluene <br /> 8020 <0 50 29 ND 3i � 107 32 110 � 2 6 � 25 70-130 ; <br /> 8020 <0 50 5 6 -ND 6-4 ; 114 6 4 114 � 0�4 � 25 � 70-130 <br /> ;Ethyl Benzene I 1 <br /> :Xylenes 8020 <0 50 32 SID 33 1 102 33 103 0 6 i 25 70-130 <br /> !Gasoline 8015 <50 0 X69 VD 41 1 101 ; 459 98 2 6 25 1 70-130 <br /> aaa-TFT(S S 1-FID 103,110' 65-13 5 <br /> gDfO � 111% IDb°'o <br /> ` i00% 101"/° 99% 65-135 <br /> l aaa-TFT(S S)-PSD 8015 <br /> definition of Te-ms <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 />