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819 Striker Ave Ste 8 <br /> Sequoia Sacramento, 9219 <br /> 95834 <br /> Analytical FAX(91Q 921 ol00 <br /> www sequoialab&=n <br /> ' Geological Technics,Inc Project Cardoza 5412352 <br /> 1101 7th Street Project Number 662 2 Reported <br /> ' Modesto CA,95354 Project Manager Joseph Angulo 01/03/05 17 30 <br /> GasolineWEMOxygenates by EPA method 8260B- Quality Control <br /> ' Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte PeSult Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 4120282-EPA 5030E (P/T1/EPA 8260B <br /> Blank(4120282-BLKI) Prepared 12/21/04 Analyzed 12/22/04 <br /> Ethanol -ND 50 119/1 <br /> Tert-butyl alcohol ND 50 " <br /> Methyl tert-butyl ether ND 050 " <br /> Di-isopropyl ether ND 050 " <br /> ' Ethyl tert-butyl ether ND 050 <br /> Tert-amyl methyl ether ND 050 <br /> 1,2-Dichloroethane ND 050 <br /> 1,2-Dibromoethane(EDS) ND 050 " <br /> Benzene ND 050 <br /> Ethylbenzene ND 050 <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 <br /> M0asoline <br /> Range Organics(C4-Cl2) ND 50 „ <br /> Surrogate 1,1-DCA-d4 934 100 93 60-140 <br /> Surrogate Toluene d8 966 100 97 60-140 <br /> Surrogate 4-BFB 101 100 102 60-140 <br /> Blank(4120282-BLK2) Prepared 12/22/04 Analyzed 12/23/04 <br /> Ethanol ND 50 ug/1 <br /> Tert-butyl alcohol ND 50 n <br /> Methyl tent-butyl ether ND 050 <br /> Di isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 050 " <br /> ' Tert-amyl methyl ether ND 050 " <br /> 1,2-Dichloroethane ND 050 " <br /> 1,2-Dibromoethane(EDS) ND 050 " <br /> Benzene ND 050 " <br /> ' Ethylbenzene ND 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> ' Gasoline Range Organics(C4-C 12) ND 50 ^ <br /> Surrogate I 1-DC4-d4 896 100 90 60-140 <br /> Surrogate Toluene-d8 107 100 107 60 140 <br /> Surrogate 4-BFB 997 100 100 60-140 <br /> ' Sequoia Analytical-Sacramento The results to 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 /> Thu analytical report must be reproduced in its entirety <br /> Page 9 of 13 <br />