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tech Analytical Labs, Inc. 575 Del Rey Avenue,Suite E <br /> 10 Sunnyvale,CA 94086 <br /> QUALITY CONTROL RESULTS SUMMARY <br /> METHOD Gas Chromatography <br /> Laboratory Control Sample <br /> QC Hatch# WGBG2000627 Date Analyzed 06/27/00 <br /> Matrix Water Quality Control Sample Blank Spike <br /> Units 4g/Liter <br /> PARAMETER 'Method 4 NIB SA SR SP SP SPD SPD RPD QC LIMITS <br /> 4Laer µg/Liter ug/Liter 4g/Liter % R pg[Liter %R RPD 1 %R <br /> Benzene 1 8020 1 <0 30 1 43 ND 4 7 1 109 48 111 25 25 I 67-115 <br /> Toluene 8020 <0 50 230 ND 31 110 29 104 5 725 82-122 { <br /> 1 <br /> Ethyl Benzene 1 8020 <0 50 6 1 ND 69 114 63 1 111 24 25 77-114 <br /> ;Xylenes 1 8020 <0 50 31 3 ND 34 108 34 109 03 25 &5-125 ; <br /> ;Gasoline 8015 X50 0 ; 484 ND ; 469 ; 97 ; 443 92 ; 5 5 ; 25 ; 74-122 ; <br /> !aaa-TFP(SSJ-PID i 8020 115% 109"a 100% 65-135 <br /> ;aaa-7TT(SSJ-FID 1 8015 104010 105% 94% 65-135 <br /> fimnon of Terms <br /> na Not Analyzed in QC batch <br /> ,1B '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(14R) Spike%Recovery <br /> nc Not Calculated <br /> i <br /> i <br />