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} ao Ave Sic 8 <br /> Sequoia Sacramento <br /> Sacrammentto CA 99834 <br /> (916)921-9600 <br /> Analytical c FAX(916)921-0100 <br /> www sequotalabs com <br /> ' Geoloarcal Technlcs,Inc Project Marct Property 5408474 <br /> p <br /> 1101 7th Street Project Number 3RD QTR 2004 Reported <br /> Modesto CA,95354 Project Manager Joseph Angulo 09/03/04 17 30 <br /> GasolineWEXOxygenates 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 4080482-EPA 5030B[PIT] <br /> Blank(408_0482-13LKI) Prepared&Analyzed 08/31/04 <br /> Benzene ND 050 119/1 <br /> ' Ethylbenzene ND 050 <br /> Toluene ND 050 <br /> Xylenes(total) ND 050 " <br /> ' Gasoline Range Organics(C4-C12) ND 50 " <br /> Surrogate Toluene-d8 9 12 100 91 60-140 <br /> Surrogate 4-BFB 896 100 90 60-140 <br /> ' Surrogate 1,2-DCA-d4 11 6 100 116 60-140--Blank(4080482-BLK2) Prepared&Analyzed 09/01/04 <br /> Ethanal ND 50 ugll <br /> Tert-butyl alcohol ND 5 010 " <br /> ethyl tert-butyl ether ND 050 " <br /> i-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 0 50 " <br /> Tert-amyl methyl ether ND 0 50 " <br /> 1,2-Dichloroethane ND 0 50 <br /> 1,2-Dibromoethane(EDB) ND 0 50 <br /> Benzene ND 0 50 " <br />' Ethylbenzene ND 0 50 ;1 <br /> Toluene ND 050 <br /> Xylenes(total) ND 0 50 " <br /> Gasoline Range Organics(C4-C 12) ND 50 " <br /> Surrogate Toluene-d8 990 100 99 60-140 <br /> Surrogate 4-BFB 928 100 93 60-140 <br /> Surrogate 1,2-DCA-d4 883 100 88 60-140 <br />' Blank(4080482-BLK3) Prepared 09/01/04 Analyzed 09102/04 <br /> Ethanol ND 50 ug/l <br /> Tert-butyl alcohol - - ND - - 5 0 - - - <br />' Methyl tert-butyl ether ND 0 50 " <br /> Di-isopropyl ether ND 0 50 <br /> Ethyl tart-butyl ether ND 0 50 " <br /> Tert-amyl methyl ether ND 0 50 " <br /> 1,2-Dichloroethane ND 0 50 " <br /> 1,2-Dibromoethane(EDB) ND 0 50 " <br /> Benzene ND 0 50 " <br />' Sequoia Analytical-Sacramento The results to 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 /> Page 13 of 16 <br />