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411 Sequoia 1551 Industrial Road <br /> San Carlos,CA 94070-4111 <br /> Analytical (650)232-9600 <br /> FAX(650)232-9612 <br /> Environmental Resolutions Projem Tosco(1) Sampled. 5/10199 to 5/11/99 <br /> 74 Digital Drive,Suite 6 Project Number- Tosco 76#5886/ER1 JOB#205504T7 Received 5/11/99 <br /> Novato,CA 94949 Project Maiiager Keith Romstad R rted 5/25/99 <br /> Sample Description: A-INF-MW3 5111199 <br /> Laboratory Sample Number: L90512"2 <br /> Batch Date Date Specific Method/ Reporting <br /> [A7nal7e Number Anal Surrogate Lurnts Lamit Result Units Nates* <br /> Sequoia Analydad-San Carlos <br /> Total Pu eable Hdrocarbons W&CIQ and BTEX by DRS LUVr <br /> Purgeable Hydrocarbons as Gasoline 9050059 5/13/99 5/13199 10 0 ND ug/l <br /> Bc=me " " <br /> 0 100 ND ^ <br /> Toluene 0100 ND " <br /> Ethylben=e 0100 ND " <br /> Xylenes(total) 0 100 ND " <br /> Surrogate, a,aa-Trtfluorotoluene " 600-140 110 % <br /> MTBE by EPA Method 8260A <br /> Methyl tert butyl ether 9050056 5/13/99 5/13/99 too 307 ug/l <br /> Surrogate 1,2-Dichloroethane-& " 760-114 992 % <br /> i <br /> 4luo—'a Analytical-San Carlos *Refer to end of report for text of notes and definitions <br /> Page 3 of 6 <br />