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�+ 819 Striker Ave Ste 8 <br /> D_ <br /> $ <br /> Sequoia Sacramento CA 99600 <br /> � � � q (916)921 9506 <br /> 'V'* Analytical F/,X{916lalabs loo <br /> %Lgpwww sequoialabs coin <br /> I <br /> tler-Ryan-Petaluma Project Tosco 11192, Stockton,CA S304545 <br /> 4 N McDowell Blvd Ste B2 ProjectNumber N/A Reported <br /> aluma CA,94954 Project Manager Dave Vossler 05/06/03 18 21 <br /> Gasolule\BTEX\Oxygenates 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 RPI] Limit Notes <br /> Batch 3050030-EPA 5030E PITT <br /> Blank(3050030-BLKI) Prepared&Analyzed 05/02/03 <br /> Benzene ND 050 ug/l <br /> Toluene ND 050 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert butyl ethcr ND 20 <br /> Gasoline(C6-C10) ND 50 " <br /> Suri ogate Toluene-d8 264 250 106 60-140 <br /> Surrogate 4-BFB 194 250 78 60-140 <br /> Laboratory Control Sample(3050030-BSI) Prepared&Analyzed 05/02/03 <br /> Benzene 304 0 50 ug/1 272 112 70-130 - <br /> aluene 164 0 50 167 98 70-130 <br /> ethyl tert butyl ether 4 85 20 448 108 60-140 <br /> Gasoline(C6-C10) 219 50 220 100 70-130 <br /> Surrogate Tohicne-d8 250 250 100 60-140 <br /> Surrogate 4-BFB 23 7 250 95 60-140 <br /> Matrix Spike(3050030-MS1) Source 5304545-02 Prepared&Analyzed 05/02/03 <br /> Benzene 297 050 ug/l 272 ND 109 70-130 <br /> Toluene 168 0 50 167 ND 101 70-130 <br /> Methyl tert butyl ether 7 13 20 448 21 112 60-140 <br /> Gasoline(C6 C10) 221 50 220 ND 100 60-140 <br /> Surrogate Tolitcne-d8 252 250 101 60-140 <br /> Sun ogate 4-BFB 223 25 0 89 60-140 <br /> Matrix Spike Dup(3050030-MSD1) Source 5304545-02 Prepared&Analyzed 05/02/03 <br /> Benzene 288 050 agll 272 ND 106 70-130 3 25 <br /> Toluene 164 0 50 167 ND 98 70-130 2 25 <br /> Methyl reit 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 /> Suriogate Toluene-d8 258 250 103 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 wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 4 of 6 <br />