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404 N Wiget Lane <br /> Sequoia Walnut Creek,CA 94598 <br /> 4 (925)988-9600 <br /> 4D�11M� Analytical FAX(925)988-9673 <br /> Ft,Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco(Unocal)#6981 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 23-Nov-99 16 42 <br /> Volatile Organic Compounds by EPA Method 8260A <br /> Sequoia Analytical -Walnut Creep <br /> Reporting <br /> Analyte Result Lunt Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-8(W910568-08)Water Sampled 26-Oct-99 08 55 Received 27-Oct-99 13 50 <br /> tert-Butyl alcohol ND 100 ug/l 1 9KO8019 04-Nov-99 06-Nov-99 EPA 8260A <br /> Methyl tert-butyl ether ND 20 to " <br /> Di-isopropyl ether ND 20 10 " <br /> Ethyl tert-butyl ether ND 20 " <br /> tert-Amyl methyl ether ND 20 " <br /> Surrogate Dibromofluoroniethane 108% 50-150 " <br /> Surrogate 1 2-Dichloroethane-d4 104 % 50-150 " <br /> MW-9(W910568-09)Water Sampled 25-Oct-99 13 00 ReLelved 27-Oct-99 1350 <br /> tert-Butyl alcohol ND 100 ug/l 1 9KO8019 04-Nov-99 06-Nov-99 EPA 8260A <br /> Methvl tert-butyl ether ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 " <br /> tort-Ainvl methyl ether ND 20 " <br /> Sito Dibroniofluoromethane 108°/a 50-150 " <br /> '00"-we 1 2-Dichloroethane-d4 106% 50-150 " <br /> MW-11 (W910568-10)Water Sampled 26-OCt-99 13 10 Received 27-Opt-99 13 50 <br /> tert-Butvl alcohol ND 100 ug/l 1 9KO8019 08-Nov 99 08-Nov-99 EPA 8260A <br /> Methyl tert-butyl ether ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethvl tert-butyl ether ND 20 " <br /> tert-Amyl methyl ether ND 20 " <br /> Surrogate Dibromofluoromethane 880% 50-150 " <br /> Surrogate 1,2-Dichloroethane-d4 780% 50-150 " <br /> S*a Analytical- Walnut Creek The nesulty in this report apply to rhe samples analyzed tnewcordvice with the chain of <br /> custody document This analytical report must he reproduced in its entirety <br /> *ee <br /> g By, r0—Ie <br /> &*19 <br /> Page 10 of 19 <br />