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Sequoia San Carl <br /> os,CIndustrial77 -41111 <br /> 4 (650) 232-9600 <br /> (D <br /> (D Analytical FAX(650) 232-9612 <br /> Environmental Resolutions Project Tosco(1) Sampled 5111199 to 5112/99 <br /> 74 Digital Dnve,Suite 6 Project Number Tosco 76#5886 Received 5112199 <br /> Novato,CA 94949 Pro ect Manager Keith Romstad Reported 5/27199 <br /> Sample Description A-Inf-MW3 05111/991800 <br /> Laboratory Sample Number L905196-01 <br /> Batch Date Date Specific Method/ Reporting <br /> IAnalyte Number Prepared Analyzed Surrogate Limits Limit Result Units Notes* <br /> Sequoia Analytical-San Carlos <br /> Total Pu table Hydrocarbons C6-C12 and BTEX by DHS LOFT <br /> Purgeable Hydrocarbons as Gasoline 9050063 5/14/99 5/14/99 100 ND ug/l <br /> Benzene " 0100 ND " <br /> Toluene 0100 ND " <br /> Ethylbenzene 0100 ND " <br /> Xylenes(total) _ 0 100 ND — <br /> Surrogate a,a,a-Tnfluorotoluene 600-140 856 % <br /> MTBE by EPA Method 8260A <br /> Methyl tert-butyl ether 9050061 5/14/99 5/14199 0 500 285 ug/l <br /> Surrogate 12-Dichloroethane-d4 760-114 107 % <br /> is <br /> om Analyhcal-San Carlos *Refer to end of report for text of notes and definitions <br /> Page 2 of 9 <br />