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819 Striker Ave Ste 8 <br /> Sequoia Sacramento,CA <br /> 929 <br /> 5834 <br /> (916)921-96009600 <br /> Ci�) FAX <br /> 21 <br /> a ,kn aIyt1Cal ww.seq 6) labs,c 00 <br /> wwwsequoialaLs.com <br /> Project: Tosco 11195,Lathrop,ettlar-Ryan-Petaluma j P,CA 5304543 <br /> 1364 N McDowell Blvd.Ste B2 Project Number: NIA Reported: <br /> Manager: a Voss <br /> ler <br /> 05/06/03 17:59 <br /> Petaluma CA,94954 Project M Dave <br /> Gas oline\BTEXIOxygenates by EPA method 8260B - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Splice Source %RFC RPD <br /> Analyte Result Limit Units Level Result %RFC Limits RPD Limit Notes <br /> Ba tch 3050017-EPA 5030B [PIT] <br /> Mntrix Spilce Dup(3050017-MSD1) Source: 5304541-01 Prepared:05/01/03 Analyzed:05/02/03 <br /> Benzene 2.85 0.50 ug/l 2.72 ND 105 70-130 6 25 <br /> Toluene 16.3 0.50 16.7 ND 98 70-130 5 25 <br /> Methyl tert-butyl ether 165 0.50 4.48 160 112 60-140 1 25 <br /> Gasoline(C6-C 10) 412 50 220 280 60 60-140 2 25 <br /> Sur-fogale:l,?-DCrl-d4 28.3 25.0 113 60-140 <br /> Srrrrogcoe: Toluene-d8 25.2 25.0 101 60440 <br /> Surrogate:4-BFB 23,7 25.0 95 60-140 <br /> Batch 3050030-EPA 5030B ]PIT] <br /> Blank(3050030-BLK1) Prepared&Analyzed:05/02/03 <br /> Benzene ND 0.50 ug/l <br /> <=rr= luene ND 0.50 " <br /> ""i hylbenzene ND 0.50 " <br /> Xylenes(total) ND 0.50 " <br /> Methyl terl-butyl ether ND 0.50 " <br /> Gasoline(C6-C10) ND 50 " <br /> Surrogate:1,?-DCA-d4 27.9 25.0 112 60-140 <br /> Surrogate:Toluene-d8 26.4 25.0 106 60-140 <br /> Surrogate:4-BFB 19.4 " 25.0 78 60-140 <br /> Laboratory Control Sample(3050030-BS1) Prepared&Analyzed:05/02/03 <br /> Benzene 3.04 0.50 ug/l 2.72 112 70.130 <br /> Toluene 16.4 0.50 16.7 98 70-130 <br /> Methyl ter[-butyl ether 4.85 0.50 4.48 108 60-140 <br /> Gasoline(C6-C10) 219 50 220 100 70-130 <br /> Surrogate: I,?-DCA-d4 27.8 25.0 HI 60-140 <br /> surrogate. Tolueiee-d8 25.0 25.0 100 60-140 <br /> Surrogate:4-BFB 23.7 25.0 95 60-140 <br /> Sequoia 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 we weight basis. <br /> This analytical report must be reproduced in its entirety. <br /> Page 5 of 7 <br />