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Sequoia 8195tnAv <br /> Sacramentoto 95814c Sic CA 95834 <br /> (916)921 9600 <br /> Analytical FAX(916)921 0100 <br /> FAX <br /> sequoialabs coin <br /> Gettier-Ryan-Dublin Project Former Unocal 5098, Stockton,CA S302592 <br /> 6747 Sierra Court,Ste J Project Number NIA Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 03/10/03 17 17 , <br /> Gasoline\BTEXIGxygenates by EPA method 8260B - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3020415-EPA 5030B JP/Tl <br /> Matrix Spike Dup(3020415-MSD1) Source S302592-23 Prepared& Analyzed 02/28/03 - <br /> Surreigare 4-BFB 276 ug/I 250 110 60-144 <br /> Batch 3030025-EPA 5030B IP/TJ <br /> Blank(3030025-BLKI) Prepared&Analyzed 03/04/03 <br /> Benzene NO 0 50 ugA <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 " <br /> xylenes(total) ND 0 50 " <br /> Methyl tent butyl ether NO 2 0 <br /> Suiiogare 1 2-DC444 248 15 0 99 60-140 <br /> Surrogate Toluene-d8 289 15 0 116 60-140 <br /> Surrogate 4-BFB 25 1 25 0 100 60-140 <br /> Laboratory Control Sample(3030025-BS]) Prepared& Analyzed 03/04/03 <br /> Benzene 215 050 ug/l 25 0 94 70-130 <br /> _=Toluene -26 2 0 50m 25 0 <br /> Methyl ten-butyl ether 231 2 0 25 0 92 60-140 <br /> Surrogate 12-DCA-d4 13 7 15 0 95 60-140 <br /> - --Surrogate Toluene-d8 - -- -- 281 - - -- 15 U -- T 111 60-140 - - - - <br /> Sui r agate 4-BFB 259 15 0 104 60-140 <br /> N7atrix Spike (3030025-MSI) WW _-_ Source S302565-02 - wPrepared& Analyzed-03/04/03 <br /> Benzene 242 050 ug/l 25 0 ND 97 70-130 <br /> Toluene - 281 050 25 0 ND 112 - 70-330 <br /> Methyl ten-butyl ether 26 1 2 0 25 0 1 6 98 60-140 <br /> Surrogate 12-DCA-d4 - 15 4 250 101 60-140 <br /> Surtobaie Toluene-d8 272 150 109 60-140 <br /> Surrogate 4-BFB 15 7 25 0 103 60-140 <br /> Sequoia Analytical - Sacramento The)esulu in this i epos t apply to the samples analy2ed in accordance will?the chain of <br /> custody document Unless otherwise stated results are repo)led on a wet werght basis <br /> This analytical r eport must be reproduced in its entirety <br /> Page 100 of 126 ' <br />