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Dr <br /> Sequoia 885' 37 <br /> Morgan Hill,CA 95037 <br /> r Analytical FAX(408)776-9600 <br /> (408)782-6308 <br /> www sequoralabs con <br /> URS Corporation(11 Project BP Hentage Site#11191,Stockton,CA MMC0165 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number BP Hentage Site#11191,Stockton,CA Reported <br /> Sacramento CA,95833 Project Manager Vern Blarth 03/14/03 16 58 <br /> GasolineTTEMOxygenates 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 RPD Limit Notes <br /> Batch 3030112-EPA 5030B (P/TI <br /> Blank(3030112-BLK1) Prepared&Analyzed 03/07/03 <br /> Ethanol ND 020 mg/kg <br /> Tert-butyl alcohol ND 0 050 " <br /> Methyl tert-butyl ether ND 0 0050 " <br /> Di-isopropyl ether ND 0 0050 " <br /> Ethyl tert-butyl ether ND 0 0050 " <br /> Tert-amyl methyl ether ND 0 0050 " <br /> I,2-Dichloroethane ND 0 0050 " <br /> 1 2-Dibromoethane(EDB) ND 0 0050 " <br /> Benzene ND 0 0050 " <br /> Ethylbenzene ND 0 0050 " <br /> Toluene ND 0 0050 " <br /> Xylenes(total) ND 0 010 " <br /> Wasoline(C&C10) ND 1 0 " <br /> Surrogate 12-DCA-d4 00476 00500 95 60-140 <br /> Surrogate Toluene-d8 00600 00500 120 60-140 <br /> Surrogate 4-BFB 00501 " 00500 100 60-140 <br /> Blank(3030112-BLK2) _..,_ _.., „ .,. .„ Prepared&Analyzed 03/10/03 <br /> Ethanol ND 020 mg/kg <br /> Tert-butyl alcohol ND 0 050 " <br /> Methyl tert-butyl ether ND 0 0050 " <br /> Di-isopropyl ether ND 0 0050 " <br /> Ethyl tert-butyl ether ND 00050 " <br /> Tert-amyl methyl ether ND 0 0050 " <br /> 1,2-Dichloroethane ND 0 0050 " <br /> 1,2-Dibromoethane(EDB) ND 0 0050 " <br /> Benzene ND 0 0050 " <br /> Ethylbenzene ND 0 0050 " <br /> Toluene ND 0 0050 " <br /> Xylenes(total) ND 0 010 " <br /> Gasoline(C6-CI0) ND 1 0 " <br /> Surrogate 12-DCA-d4 00471 00500 94 60-140 <br /> Surrogate Toluene-d8 00588 00500 118 60-140 <br /> equoia Analytical-Morgan Hill 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 /> 5 of 9 <br />