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1551 <br /> Sequoia anCarldustA940 0 <br /> San Carlos CA 94070 <br /> (650)232-9600 <br /> Analytical FAX(650)232-9612 <br /> wwwsequoialabs.com <br /> -.:=•.!`",a•r-Ryan/Geostrategies(1) Project: Tosco(1) <br /> 6747 Sierra Court, Suite J Project Number: Tosco#11195,Lathrop,CA Reported: <br /> Dublin CA,94568 Project Manager: Deanna Harding 12/10/01 19:11 <br /> Total Purgeable Hydrocarbon (C6-C12) by EPA 8015M 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 /> MW-3(L111147-04)Water Sampled: 11/21/01 16:15 Received: 11/21/01 18:15 <br /> Purgeable Hydrocarbons as Gasoline ND 250 ug/l 5 1120009 12/04/01 12/05/01 EPA 8021B <br /> Benzene ND 2.5 " <br /> Toluene ND 2.5 " <br /> Ethylbenzene ND 2.5 " <br /> Xylenes(total) ND 2.5 " <br /> Methyl tert-butyl ether 3600 250 50 M-04 <br /> Surrogate:a,a,a-Triuorotoluene 99.4% 70-130 " <br /> MW-4(L111147-05)Water Sampled: 11/21/01 14:10 Received: 11/21/0118:15 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/l. 1 1120009 12/04/01 12/05/01 EPA 802113 <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 95 5.0 " <br /> R1:;:;_::_;date:a,a,a-Trij9uorololuene 102% 70-130 <br /> MW-5(L111147-06)Water Sampled: 11/21/01 15:45 Received: 11/21/01 18:15 _ <br /> Purgeable Hydrocarbons as Gasoline ND _ 200 ug/1 4 1120008 12/04/01 12/05/01 EPA 8021B <br /> Benzene ND 2.0 " <br /> Toluene <br /> ND 2.0 <br /> Ethylbenzene ND 2.0 " <br /> Xylenes(total) ND 2.0 " <br /> Methyl tert-butyl ether 3100 200 40 M-04 <br /> Surrogate:a,a,a-Triuorololuene 90.1 % 70-130 " <br /> & ,_.dia Analytical -San Carlos The results in this report apply to the samples analjged in accordance with the chain of <br /> custody document. This analytical report must be reproduced in its en irety. <br /> Page 3 of 18 <br />