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1 <br /> 819 Striker Ave Ste 8 <br /> Sequoia Sacramento CA 95834 <br /> (916)921-9600 <br /> Analytical FAX(916)921-0100 <br /> www sequolalabs corn <br /> Geological Technics,Inc Project Cardoza 5412155 <br /> ' 1101 71h Street Project Number 662 2 Reported <br /> Modesto CA,95354 Project Manager Joseph Angulo 12/21/04 12 02 <br /> GasohnelBTEMOxygenates by EPA method 8260E <br /> ' Sequoia Analytical-Sacramento <br /> Aeporimg <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Note <br /> ' EW-2(S412155-01)Water Sampled 12/06/0413 45 Received 12/07/04 12 00 <br /> Tert-butyl alcohol 140 50 ug/l 10 4120235 12/19/04 12/20/04 EPA 8260B <br /> Methyl tert-butyl ether 1800 50 <br /> ' Di-isopropyl ether ND 50 " <br /> Ethyl tert-butyl ether ND 50 n <br /> Tert-amyl methyl ether 7.3 50 1. <br /> 1,2-Dichloroethane ND 50 <br /> ' 1,2-Dibromoethane(EDB) ND 50 <br /> Benzene ND 5 0 ^ " <br /> Ethylbenzene ND 5 0 <br /> Toluene 5 2 5 0 <br /> ' Xylenes(total) 11 5 0 <br /> Gasoline Mange Organics(C4-C12) 2200 500 " <br /> Surrogate 1,2-DCA44 111% 60-140 " <br /> 16 urrogate Toluene-d8 98% 60-140 " <br /> urrogate 4-BFB 103% 60-140 <br /> EW-2(5412155-02)Water Sampled 12/06/04 16 00 Received 12/07/04 12 00 <br /> ' Tert-butyl alcohol 120 50 ug/I 10 4120235 12/19/04 12/20/04 EPA 8260B <br /> Methyl tert-butyl ether 1200 5 0 <br /> Dl-isopropyl ether ND 5 0 <br /> Ethyl tert-butyl ether ND 5 0 <br /> Tert-amyl methyl ether 6 4 5 0 <br /> 1,2-Dichloroethane ND 5 0 " <br /> 1,2-Dibromoethane(EDB) ND 50 " ^ <br /> Benzene ND 50 <br /> ' Ethylbenzene 6 1 50 <br /> Toluene 7 1 so " <br /> Xylenes(total) 29 50 " ^ <br /> Gasoline Range Organics(C4-C12) 1400 500 <br /> ' Surrogate 12-DCA-d4 104% 60-140 " <br /> Surrogate Toluene-d8 98% 60-140 <br /> Surrogate 4-BFB 101% 60-140 <br /> 1 <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 analytical report must be reproduced in its entirety <br /> Page 5 of 12 <br /> 1 <br />