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i <br /> 819 Sinker Ave Ste 8 <br /> DSacramento CA <br /> Sequoia 916 )6)92I95834 96D0 <br /> + .0 Analytical( FAX(9l6}9210100 <br /> www seaunmlehs cam <br /> lqqlw <br /> Gettler-Ryan-Petaluma Proaect Tosco 11192,Stockton,CA S306465 <br /> 1364 N McDowell Blvd Ste B2 Project Number N/A Reported <br /> Petaluma CA,94954 Project Manager Dave Vossler 07/09/03 18 23 <br /> Gasollne\BTEXIOxygenates 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 RAD Limit Notes <br /> Batch 3070038-BPA 50301 SPIT] <br /> Blank(3070038-BLKI) Prepared&Analyzed 07/02/03 <br /> Tert-butyl alcohol ND 50 ug/1 <br /> Methyl tent-butyl ether ND 050 " <br /> Benzene ND 050 " <br /> Ethylbenzene ND 050 <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Gasoline(C6 C10) ND 50 " <br /> Surrogate Toluene-d8 249 250 100 60 140 <br /> Surrogate 4-BFB 23 7 25 0 95 60-140 <br /> Sari agate 12-DCA-d4 242 250 97 60-140 <br /> Laboratory Control Sample(3070038-BSI) _ -- - WW Prepared&Analyzed 07/02/03 _ m <br /> Methyl tert-butyl ether 196 050 ug/1 224 88 60 140 <br /> Benzene 114 050 13 6 84 70 130 <br /> Toluene 73 2 0 50 83 4 88 70-130 <br /> Gasoline(C6-C10) 864 50 1100 79 70-130 <br /> Surrogate Toluene-d8 249 250 100 60140 <br /> Surrogate 4-BFB 260 25 0 164 60 140 <br /> Suri ogaie 12 DCA-d4 249 25 0 100 60-140 <br /> Matrix Spike(3070038-MSI) Source 5306532-02 Prepared&Analyzed 07/02/03 <br /> Methyl tcrt-butyl ether 21 1 050 ug/I 22 4 ND 94 60 140 <br /> Benzene 12 0 050 136 ND 88 70-130 <br /> Toluene 75 5 050 834 ND 91 70 130 <br /> Gasoline(C6 C10) 891 50 1100 ND 81 60 140 <br /> Suitogate Toluene-d8 240 250 96 60-140 <br /> Sul rogate 4-BF8 — - -- -- 256 250 102 60-140 <br /> Surrogate 1 2-DCA-d4 245 25 0 98 60-140 <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance wish the chain of <br /> custody document Unless othem,tse stated r evults are reported on a wet weight basis <br /> This analytical report must be reproduced in its enttrery <br /> Page 5 of 7 <br />