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819 Stnker Ave Ste 8 <br /> Saciainento,cA 95834 <br /> IDSequoia (916)921-96M <br /> FAX(916)921-0100 <br /> Analytical www sequoias coin <br /> Ryan-Dubliti Project TOSCO 11192,Stockton,CA S305429 <br /> Sterna Court,Ste J Project Number N/A Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 05/29/03 17 15 <br /> GasolinelBTEXIOxygenates by EPA method 8260B-Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> JAnalyte Result Lunt Units Level Result %REC Lunns RPD Limit Notes <br /> Batch 3050449-EPA 5030B JPfTJ <br /> Laboratory Control Sample(3050449-BSI) Prepared&Analyzed 05/27/03 <br /> Benzene 137 050 ug/I 136 101 70-130 <br /> Toluene 797 050 834 96 70-130 <br /> Methyl tert-butyl ether 253 20 22 4 113 60-140 <br /> Gasoline(C6-CIO) 887 50 1100 81 70-130 <br /> Surrogate Toluene-d8 248 250 99 60-140 <br /> Surrogate 4-BFB 249 250 100 60-140 <br /> Batch 3050466-EPA 5030B PIT <br /> Blank(3050466-BLK1) Prepared&Analyzed 05/27/03 <br /> Benzene ND 050 ug/l <br /> Wi.ene <br /> ND 050 <br /> ND 030 " <br /> Xylenes(total) ND 050 <br /> Methyl tert-butyl ether ND 20 " <br /> Gasoline(C6-C 10) ND 50 " <br /> Surrogate Toluene-d8 296 250 118 60-140 <br /> Surrogate 4-BFB 248 250 99 60-140 <br /> Blank(3050466-BLK2) Prepared&Analyzed 05/28/03 <br /> Benzene ND 050 ugfl <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 2 0 " <br /> Gasoline(C6-CIO) ND 50 " <br /> Surrogate Toluene-d8 15 5 " 250 102 60-140 <br /> Surrogate 4-BFB 245 250 98 60-140 <br /> oia Analytical- Sacramento 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 wee weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 14 of 23 <br />