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Y"` 819 SenAve Ste 8 <br /> Sequoia Sacramentoto CA 95834 <br /> Analytical FAX(916)921-9600 <br /> (9E6)921 0100 <br /> www sequaialabs com . <br /> Gettler-Ryan-Petaluma Project Tosco 6981,Stockton,CA S304544 <br /> 1364 N McDowell Blvd Ste B2 Protect Number NIA Reported <br /> Petaluma CA,94954 Project Manager Dave Vossler 05/06/03 18 09 <br /> GasohneWEX\Oxy_genates 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 3050030-EPA 5030B JP/'f] - - - - - <br /> Blank(3050030-BLKl) Prepared&Analyzed 05/02/03 <br /> Benzene ND 050 ug/l <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 20 " <br /> Gasoline(C6 CIO) ND SO " <br /> Suri agate Tohrene-d8 264 250 106 60-140 <br /> Sin i ogate 4-BFB 194 250 78 60-140 <br /> Laboratory Control Sample(3050030-BSI) _ Prepared&Analyzed 05/02/03 <br /> Benzene 304 050 ug/1 272 112 70-130 <br /> Toluene 164 050 167 98 70-130 <br /> Methyl tert-butyl ether 485 2 0 448 108 60-140 <br /> Gasoline(C6-C10) 219 50 220 100 70-130 <br /> Surrogale Toluene-d8 250 250 100 60-140 <br /> Swiogale 4-BFB 237 2.50 95 60-140 <br /> Matrix Spike(3050030-MSI) Source 5304545-02 Prepared&Analyzed 05/02/03 <br /> Benzene 297 050 ug/1 272 ND 109 70-130 <br /> I <br /> Toluene 168 050 167 ND I01 70-130 <br /> Methyl tert-butyl ether 7 13 20 448 21 112 60-140 <br /> Gasoline(C6-C 10) 221 50 220 ND 100 60-140 <br /> i <br /> I <br /> Surrogate Toluene-d8 252 250 101 60-140 <br /> Strrro ate 4-BFB <br /> g 223 250 89 60-140 <br /> Matrix Spike Dup(3050030-MSD1) Source 5304545-02 Prepared&Analyzed 05/02/03 <br /> Benzene 288 0 50 ug/l 272 ND 106 70 130 3 25 <br /> I <br /> Toluene 164 050 167 ND <br /> 98 70-130 2 25 <br /> Methyl tert-butyl ether 698 2 0 448 2 1 109 60-140 2 25 <br /> Gasoline(C6-C10) 209 50 220 ND 95 60-140 6 25 <br /> i <br /> i <br /> Swrogate Toluene-d8 25 8 25 0 103 60-140 <br /> Sequoia Analytical-Saerarncnto The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report muse be reproduced to its entirety 0 <br /> Page 4 of 6 -- <br />