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' 819 Stnkcr Ave Sic 8 <br /> Sequoia Sacramento CA 95834 <br /> 41) (915)92 92 1-960D <br /> FAX(915)921 0100 <br /> ► Analytical www scquoialabs com <br /> Geological Technics,Inc Project Cardoza 5312195 <br /> 1101 7th Street Project Number 662 2 Reported <br /> Modesto CA,95354 Project Manager Joseph Angulo 12/24/03 17 08 <br /> Gasoline\BTEX1Oxygenates 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 Lunit Notes <br /> ' Batch 3120094-EPA 5030B IP/TI <br /> Blank(3120094-BLK1) Prepared&Analyzed 12/08/03 <br /> Tert-butyl alcohol ND 50 ug/l <br /> Methyl tert-butyl ether ND 050 <br /> Di-isopropyl ether ND 050 <br /> Ethyl tert-butyl ether ND 050 " <br /> Ten-amyl methyl ether ND 050 <br /> 1 2-Dibromoethane(ED13) ND 050 <br /> Benzene ND 050 <br /> Ethylbenzene ND 0 50 " <br /> ' Toluene ND 050 <br /> Xylenes(total) ND 050 <br /> Gasoline Range Organics ND 50 <br /> Surrogate Toluene-d8 258 25 0 103 60-140 <br /> Surrogate 4 BFB 25 0 25 0 100 60-140 <br /> Surrogate 12 DCA-d4 268 250 107 60-140 <br /> ' Blank(3120094-BLK2) Prepared&Analyzed 12/05/03 <br /> Tert-butyl alcohol ND 5 0 ug/l <br /> Methyl ter[-butyl ether ND 0 50 <br /> Di-isopropyl ether ND 050 " <br /> ' Ethyl tert butyl ether ND 050 ,} <br /> Tert amyl methyl ether ND 050 <br /> 1,2-Dibromoethane(EDB) ND 050 " <br /> ' Benzene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> ' Gasoline Range Organics ND 50 <br /> Surrogate Toluene-d8 263 25 0 105 60-140 <br /> Surrogate 4-BFB 248 25 0 99 60-140 <br /> ' Surrogate 12-DCA-d4 263 250 105 60-140 <br /> ' Sequoia Analytical- Sacramento The results in 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 /> This analyPical report must be reproduced in ars entirety <br /> Page 24 of 31 <br />