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819 Striker Avenue Suite 8 <br /> 1 <br /> Sequoia - — Sacramento CA 95834 <br /> (916)921-9600 <br /> FAX(916)921-0100 <br /> Analytical Www seguoialabs com <br /> i <br /> Gettler-Ryan-Petaluma Project Tosco 6981,Stockton,CA 5211676 <br /> 1364 N McDowell Blvd Ste B2 Project Number N/A Reported <br /> Petaluma CA,94954 Project Manager Dave Vossler 12/09/0214 19 <br /> Gasohne\BTEXIOxygenates by EPA method 8260B - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Um is Level Result %REC Limits RPD Limit Notes <br /> Batch 2120101 -EPA 5030B JP/TJ <br /> Matrix Spike Dup(2120101-MSD1) Source 5211698-05 Prepared&Analyzed 12/05/02 <br /> Benzene 744 050 ug/1 670 111 70-130 5 25 <br /> Toluene 388 050 405 96 70-130 4 25 <br /> Methyl tert butyl ether 11 8 050 109 108 60-140 3 25 <br /> Gasoline(C6-C10) 373 50 550 68 60-140 8 25 <br /> Surrogate 12 DCA-d4 266 250 106 60-140 <br /> Surrogate Toluene-d8 268 250 107 60-140 <br /> Surrogate 4-BFB 304 250 121 60-140 <br /> Sequoia Analytical- Sacramento Pie results to this repot t apply to the samples analyzed in accordance with the chain <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 5 of 6 <br />