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1 <br /> 819 Sinker Ave Ste B <br /> Sequoia Sacramento,CA 95834 <br /> (916)921 9600 <br /> Analytical <br /> FAX(916)921-0100 <br /> www sequotalabs corn <br /> Geological Technics,Inc Project Montas Bros 5504379 <br /> 1101 7th Street Project Number 724 2 Reported <br /> Modesto CA,95354 Project Manager Mandeep Singh 05/05/05 10 29 <br /> Purgeable Hydrocarbons and BTEX by EPA 8015B/8021B <br /> ' Sequoia Analytical- Sacramento <br /> Reporting <br /> Analyte Result Lurut Units Dilution Batch Prepared Analyzed Method Note <br /> MW-2(5504379-01)Water Sampled 04/18/05 12 35 Received 04/18/05 18 00 <br /> Gasohne Range Organics(C4-C12) 63 50 ug/I 1 5040250 04/20/05 04/20/05 EPA <br /> 8015BI8021B <br /> Benzene ND 050 R " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 20 <br /> Surrogate 4-BFB(FID) 110% 60-140 <br /> Surrogate a a a-TFT(PID) 86% 60-140 " <br /> ' MW-7(5504379-02)Water Sampled 04/18/05 10 00 Received 04/18/€15 18 00 <br /> Gasoline Range Organics(C4-C 12) ND 50 ug/l 1 5040250 04/20/05 04/20105 EPA <br /> 8015B/8021B <br /> Benzene ND 050 " <br /> 18oluene ND 050 " <br /> thylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> ' Methyl tert-butyl ether 3 3 2 0 " n <br /> Surrogate 4-BFB(FID) 113% 60-140 <br /> Surrogate a a a-TFT(PID) 88% 60-140 <br />' MW-11(5504379-03)Water Sampled 04/18/051104 Received 04/18/0518 00 <br /> Gasoline Range Organics(C4-C 12) ND 50 ug/l 1 5040250 04/20/05 04/20/05 EPA <br /> 8015B/8021B <br /> Benzene ND 0 SD " <br /> Toluene ND 0 50 <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tent-butyl ether ND 2 0 " <br /> Surrogate 4-BFB(FID) 105% 60-140 I, <br /> Surrogate a,a,a-TFT(PID) 84% 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 /> Thts analytical report must be reproduced in its entirety <br /> Page 3of10 <br />