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1551 <br /> Road <br /> Sequoia San <br /> 4070 <br /> San Carlos 23 -96 0 <br /> {650)232-9600 <br /> Analytical FAX(650) 12 - <br /> 1 wwwsequoialabs,cbs.com <br /> Gettler-RyanlGeostrategies(1) Project: Tosco(1) <br /> 6747 Sierra Court;Suite 3 Project Number: Unocal SS408671,Stockton,CA Reported: <br /> Dublin CA,94568 Project Manager: Deanna Harding 09/05/01 07:36 <br /> Total Purgeable Hydrocarbon (C6-C12) by EPA 801.5M and BTEX/MTBE by EPA 8021B <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> TB-LB(L]08144-01)Water Sampled: 08122101 00:00 Received.08/22/01 19:40 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/1 1 1090001 0910110) 09/01/01 BHS LUFT <br /> Benzene ND 0.50 " <br /> Toluene ND 0.50 <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) ND '0.50 " <br /> Methyl iert-butyl ether ND 5.0 " IT <br /> Surrogate:a,o,a-Tri)7uoro1o1uene 95.0% 70-130 " <br /> )JW-1 (L]08144-02)Water Sampled: 08/22/01 11:57 Received: 08/22/01 19:40 <br /> i <br /> Purgeable Hydrocarbons as Gasoline ND 50 uO 1 1090001 0910110) 09/01/01 DHS LUFT <br /> Benzene ND 0.50 " <br /> Toluene ND 0.50 " <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) ND 0.50 " <br /> ]Methyl tert-butyl ether 390 50 10 09/03/01 M-04 <br /> Surrogate:a,a,a-Trijrluorotoluene 98.8% 70-130 09101101 <br /> -MW 2(LT08144=03)NA'ater Sampled:08/22/01 10:40 Received:08/22/01 19:40 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/1 1 1090001 09/01/01 09/01/01 DHS LUFT <br /> Benzene ND 0.50 " " <br /> Toluene ND 0.50 <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) ND 0.50 " <br /> Methyl tert-butyl ether ND 5.0 <br /> Surrogate:a,a,a-Trifluorotoluene 101 % 70-130 " <br /> I <br /> Sequoia Analytical -San Carlos The results in this report apply to the samples anol)red in accordance with the chain of <br /> custody document. This analytical report must be reproduced in its entirety. <br /> Page 2 of.10 <br />