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. n <br /> Sequoia 1551 Industnal Road <br /> San Carlos,CA 94070-4111 <br /> Analytical (650'232.9600 <br /> FAX(650)232-9612 <br /> i <br /> Environmental Resolutions Project- Tosco(l) Sampled 5110199 to 5/11/99 <br /> 74 Digital Drive,Smte 6 Project Number Tosco 76 45886/ERI JOB#205504T7 Received 5/11/99 <br /> Novato,CA 94949 EMect Manager Keith Romstad Reported 5125/99 <br /> Sample Description: A-INF-MW3 5110199 <br /> Laboratory Sample Number: L905129-01 <br /> Batch Date Date Specific Method/ Reporting <br /> Analyte Number Prepared Analyzed Surrogate Limits limit Result Units Notes* <br /> Sequoia Analytical_San Carlos <br /> Total Purgeable Hydrocarbons(C6-C12)and BTEX by DHS LUF_F <br /> Purgeable Hydrocarbons as Gasoline 9050069 5116199 5/16/99 100 ND ug/l 1 <br /> Benzene 0100 ND " <br /> Toluene " " " 0100 ND " <br /> Ethylbenzene " 0100 ND " <br /> Xyl®es(total) " 0 100 ND " <br /> Surrogate a,a,a-Trifluorotoluene " 600-140 792 % <br /> MTBE by EPA Method 8260A <br /> Methyl tert butyl ether 9050056 5/13/99 5113199 0 500 206 ug/l <br /> Surrogate 1,1-Ihchloroethane-l4 " 760-114 972 % <br /> 0 <br /> *U-11a Analytical-San Carlos *Refer to end of reportfor text of notes and definitions <br /> Page 2 of 6 <br />