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r ' 1 819 5trlker Avenue Suite 8 <br /> 1 Sequoia Sacramento c9 <br /> 5834 <br /> {.a (915)922 1-96009600 <br /> FAX(916)921-0100 <br /> Analytical www sequolalabs coin <br /> Gettler-Ryan-Petaluma Project Tosco 6981, Stockton,CA S211676 <br /> Project Number NIA Reported <br /> 13641V McDowell Blvd Ste B2 � 12/09/02 14 l9 <br /> Petaluma CA,94954 Project Manager Dave Vossler <br /> Gasollne\BTEXIOxygenates by EPA metbod 8260B - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte <br /> Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2120101 -EPA 5030B (PIT] <br /> Blank(2120101-BLK1) Prepared&Analyzed 12/05/02 <br /> Benzene ND 050 ug/l <br /> Toluene ND 0 50 <br /> 6thylbenzene <br /> ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 0 50 " <br /> Gasoline(C6-C10) ND 50 <br /> Suirogate 12-PCA-d4 272 250 109 60-140 <br /> Surrogate Toluene-d8 265 250 106 60-140 <br /> Surrogate 4-BFB 306 250 122 60-140 <br /> Lahmstory Control Sample(2120101-BSI) Prepared&Analyzed 12/05/02 <br /> 111we 781 050 ug/1 670 117 70-130 <br /> Toluene 385 050 405 95 70-130 <br /> Methyl tert-butyl ether 120 050 109 110 60-140 <br /> Gasoline(C6-C10) <br /> 441 50 550 80 70-130 <br /> Surrogate 12-DCA-d4 <br /> 264 250 106 60-140 <br /> Suirogate Toluene-d8 <br /> 261 ol 250 104 60-140 <br /> Surrogate 4-BFB 294 1125 0 118 60-140 <br /> Matrix Spike(2120101-MS1) Source S211698-05 Prepared&Analyzed 12/05/02 <br /> Benzene 782 050 ug/1 670 117 70-130 <br /> Toluene 405 050 405 100 70-130 <br /> Methyl tent butyl ether <br /> 122 050 109 112 60-140 <br /> Gasoline(C6-C10) <br /> 404 50 550 73 60-140 <br /> Suriogate 12-DCA-d4 <br /> 263 250 105 60-140 <br /> Swrognte Toluene-d8 <br /> 262 250 105 60-140 <br /> Surrogate 4 BFB <br /> 286 250 114 60-140 <br /> a <br /> uoi1 Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must he reproduced in its entirety <br /> Page 4 of 6 <br />