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1551 Industrial Road <br /> �D— 1 <br /> Sequoia Sark Carlos CA 94070 <br /> Analytical FAX(650)232-9600 <br /> (650)232-9612 <br /> www.sequoialabs.com <br /> pr, <br /> Gettler-Ryan/Geostrategies(1) Project: Tosco(1) <br /> 6747 Sierra Court,Suite J Project Number: Tosco#11195,Lathrop,CA Deported: <br /> Dublin CA,94568 Project Manager: Deanna Harding 12/10/01 19:11 <br /> Total Purgcable Hydrocarbon (C6-C12) by EPA 8015M and BTEXIMT13E by EPA 8021B <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-6(L111147-07)Water Sampled: 11/2110113:35 Received: 11/21/0118:15 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/l 1 1120009 12/04/01 12/04/01 EPA 8021B <br /> Benzene ND 0.50 Pi " 1. " <br /> Toluene ND 0.50 " <br /> Ethylbenzene ND 0.50 <br /> Xylenes(total) ND 0.50 " <br /> Methyl tert-butyl ether 5.4 5.0 <br /> Surrogate:a,a,a-Trifluorotoluene 81.2% 70-130 " <br /> MW-8(L111147-08)Water Sampled: 11/21/0112:05 Received: 11/21/0118:15 _ <br /> Purgeable Hydrocarbons as Gasoline ND 120 ugll 2.5 1120008 12/04/01 12/05/01 EPA 8021B <br /> Benzene ND 1.2 " <br /> Toluene ND 1.2 <br /> Ethylbenzene ND 1.2 " <br /> Xylenes(total) ND 1.2 <br /> Methyl tert-butyl ether 1500 120 25 " M-04 <br /> Surrogate:a,a,a-Triuorotoluene 93.6% 70-130 <br /> MW-9(1.x111147-09)Water Sampled: 11/21/01 11:30 Received: 11/21/01 18:15 _ <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/1 1 1120009 12/04/01 12104101 EPA 8021B <br /> Benzene ND 0.50 " <br /> Toluene ND 0.50 <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) ND 0.50 " <br /> Metbyl tert-butyl ether ND 5.0 " <br /> Surrogate: a,a,a-Tris luorotoluene 97.3% 70-1.30 " <br /> Sequoia Analytical-San Carlos The results rn this report appl)?to the samples analyzed in accordance with the chain oj< <br /> custody document. This analytical report must be reproduced in its entirely. <br /> Page 4 of 18 <br /> I <br /> I <br />