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(D Sequoia 1551 industrial Read <br /> San Carlos CA 94070-4111 <br /> 4 (650)232-9600 <br /> Analytical <br /> FAX(650)232-9612 <br /> nvironmental Resolutions Project Tosco(1) Sampled 5/11/99 to 5/12/99 <br /> 74 Digital Drive,Suite 6 Project Number Tosco 76#5886 Received 5/12/99 <br /> Novato,CA 94949 Project Manager Keith Romstad Reported 5/27/99 <br /> Sample Description A-Inf-MW3 051121991000 <br /> Laboratory Sample Number: L905196-03 <br /> Batch Date Date Specific Method/ Reporting <br /> Analyte Number PEMarW Analyzed Surrogate Limits Limit Result Units Notes* <br /> Sequoia Analytical=San Carlos <br /> Total Pur eable Hydrocarbons C6-C12 and STEX by DHS LUFr <br /> Purgeable Hydrocarbons as Gasoline 9050063 5/14/99 5/14/99 100 ND ugfl <br /> Benzene " 0100 ND <br /> Toluene " 0100 ND " <br /> Ethylbenzene 0100 ND " <br /> Xylenes(total) 0 100 ND " <br /> Surrogate a,a,a-Trifluorotoluene " 600-140 860 % <br /> MTBE by EPA Method 8260A <br /> Methyl tert-butyl ether 9050061 5/14/99_ 5114/99_ 100 22 7 ug/1 <br /> Surrogate 1,2-Dichloroethane-d4 " 760-114 103 % <br /> oia Analytical-San Carlos *Refer to end of report far text of notes and definitions <br /> Page 4 of 9 <br />