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'551 1 <br /> Sequoia r►dirst70 1 11 <br /> �,�i�,CA9ao�0-4 >> <br /> 4 (650)232-9600 <br /> FAX(650)232-9612 <br /> i!D Analytical www segLkAalabs com <br /> Gettler-Ryan/Geostrategies(1) Pmject: Tosco(5) Sampled 6126/00 <br /> 6747 Sierra Court,Suite J Project Number Tosco(Unocal)SS#6981 Received 6127/00 <br /> Dublin,CA 94568 Pm ect Manager Deanna HT±M Reported 7/12/00 <br /> Sample Description: MW-14 <br /> Laboratory Sample Number: L006236-11 <br /> Batch Date Date Specific Method/ Repomng <br /> Anal Number ftMared Analyzed Surra ate Limits Limit Result Units Notes* <br /> Sequoia Analytical-San Carlos <br /> Total Purizeable Hydrocarbons C6-C12 BTEX and MTBE by DHS LUF1' <br /> Purgeable Hydrocarbons as Gasoline 0070021 7/6100 717/00 500 ND ug/l <br /> Benzene " " " 0 500 ND " <br /> Toluene " 0 500 ND " <br /> Ethylbeazene " 0 500 ND " <br /> Xylenes(total) 0 500 ND " <br /> Methyl tert-butyl ether " 500 151 " <br /> Surrogate a,a,a-Tnfluorotoluene " " 700-130 762 % <br /> Volatile Organic Compounds by EPA Method 8260A <br /> 1,2-Dibromoedme 0070031 717100 7/7100 400 ND ug/l <br /> 1,2-Dichioroethane 400 188 " <br /> Di-isopropyl ether " " 400 ND " <br /> tert-butyl ether " n 400 ND " <br /> ll tert butyl ether " 400 346 " <br /> Tat-amyl methyl ether " 400 ND " <br /> Tert-butyl alcohol 200 ND " <br /> Surrogate. 1,2-D:chloroedum,d4 " " 760-114 104 % <br /> Surrogate Toluene-d8 " " 880-110 100 " <br /> ole Analytical-San Carlos *Refer to end ofreportfor tart of notei and defuitttons <br /> Page 12 of 30 <br />