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aa- ) 819 Straker Ave Ste 8 <br /> Sequoia Sacramento,CA 95834 <br /> IW Analytical FAX{916)921-9600 <br /> (916)921-0100 <br /> Ryan-Dublin Project Former Unocal 0187,Stockton,CA 5211332 <br /> 6749Sierra C <br /> ourt,urt,Ste 3 Project Number N/A Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 12/27/02 17 49 <br /> GasolineWEXIOxygenates by EPA method 8260B - Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br />[Analyte Result Lunit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2110265-EPA 5030B IP/TJ <br /> Matrix S ike Du 2110265-MSD3 Source S211132-02 Prepared&Analyzed 11/18/02 <br /> Benzene 13 6 050 ugA 134 ND 101 70-130 13 25 <br /> Toluene 81 9 050 81 0 ND 101 70-130 15 25 <br /> Methyl tert-butyl ether 22 6 050 21 8 ND 104 60-140 15 25 <br /> Gasoline(C6-CIU) 793 50 " 1100 ND 72 60-140 12 25 <br /> Surrogate 1,2-DCA-d4 23 3 25 0 93 60-140 <br /> Surrogate Toluene-d8 25 6 25 0 101 60-140 <br /> Surrogate 4-BFB 25 4 25 0 102 60-140 <br /> Batch 2110282-EPA 50308 JPITJ <br /> Blank(2110282-BLKI Pre ared& Analyzed I IA 9/02 <br /> Bee: ND 050 U94T ND 050 <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl cert-butyl ether ND 050 " <br /> Gasoline(C6-C10) ND 50 " <br /> Surrogate 1 2-DCA-d4 24 7 25 0 99 60-140 <br /> Surrogate Toluene-d8 231 25 0 92 60-140 <br /> Surrogate 4-BFB 229 25 0 92 60440 <br /> Blank(2110282-BLK2) Prepared&Analyzed 11/20/02 <br /> Benzene ND 0 50 u8A <br /> Toluene ND 050 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl ten-butyl ether ND 050 " <br /> Gasoline(C6-C10) ND 50 " <br /> Surrogate 1,2-DCA-d4 23 0 " 25 0 <br /> 92 60-140 <br /> Surrogate Toluene-d8 236 " 25 0 94 60-140 <br /> Surrogate 4-BFB 13 6 250 94 60-140 <br /> to Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document Unless otherwise stated, results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> 33 of 41 <br />