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1551 Industrial Road <br /> San Carlos.CA 94070-4111 <br /> Sequoia (650)232-%% <br /> FAX(650)232-%12 <br /> Analytical www sequolakbs COA <br /> Z;ttler-Ryan/Geostrategres(1) Project Tosco(5) Sampled 6126100 <br /> 6747 Sierra Court,Suite J= - Project Number -Tosco(Unocal)SS#6981 - Ramved. 6127100 - <br /> Dublin,CA 94568 Pro ect Manager Deanna HardinReported. 7/12100 <br /> Sample Description: MW-6 <br /> Laboratory Sample Number: L006236-06 <br /> Batch Date Date Specific Method/ Reporting <br /> Anal Number Analyzed Surrogate Limits Limit Result Units Notes" <br /> Seauolq Analytical-San!garlos <br /> Total Purveable Hydrocarbons C6-C12 BTEX and MTRE hy DHS TATT <br /> Purgeable Hydrocarbons as Gasoline 0070020 7/6100 717100 500 ND ugll <br /> Bone 0 500 ND " <br /> Toluene " 0 500 0.671 " <br /> Ethylbertme " " 0 500 ND " <br /> Xylenes(total) n n " 0 500 0.787 " <br /> Methyl Cert-butyl ether " " " 500 ND " <br /> Surrogate a,a.a-Tnfluorotoluene " 700-130 115 % <br /> Volatile Oruanic Oxveenated Coxnvoun&s by EPA Method 8260A <br /> Tert-butyl alcohol 0070023 7!7/00 717100 100 ND ug/l <br /> Methyl teat-butyl ether " 200 ND " <br /> Di-isopropyl ether 200 ND " <br /> Ethyl tat butyl ether " " 200 ND . <br /> Tert-mmyl methyl ether 200 ND " <br /> Surrogate 1,2-Dichloroethane-d4 " " 760-114 104 % <br /> I • <br /> Sequoia Analytical-San Carlos *Refer to end ofreport for trot ofrotes and definitions <br /> Page 7 of 30 <br />