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i <br /> 404 N Wiget Lane <br /> Sequoia Walnut Creek,CA 94598 <br /> 4,!D <br /> (925)988-9600 <br /> IwoAnalytical FAX (925)988-9673 <br /> A,Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco(Unocal)#6981 Reported <br /> Dublin CA,94568 Protect Manager Deanna L Harding 23-Nov-99 16 42 <br /> Volatile Organic Compounds by EPA Method 8260A <br /> Sequoia Analytical - Walnut Creek <br /> Reporting <br /> Analyte Result Luna Units Dilution Batch Prepared Analyzed Method Nates <br /> VW-1 (W910568-14)Water Sampled 26-Oct-99 10 40 Received 27-Oct-9913 50 <br /> tert-Butyl alcohol ND 100 ugll 1 9KO8019 08-Nov-99 08-Nov-99 EPA 8260A <br /> Methyl tert-butyl ether ND 20 " <br /> Di-isopropyl ether ND 20 to <br /> Ethyl tert-butyl ether ND 20 " <br /> tert-Amyl methyl ether ND 20 " <br /> Suirogaie Dibrotriofluoromethane 880% 50-150 " <br /> Surrogate 12-Diehloroethane-d4 720% 50-150 " <br /> VW-3 (W910568-15)Water Sampled 26-Oct-99 15 40 Received 27-Oct-99 13 50 <br /> Cert-Butyl ali,ohol ND 1000 ugll l0 9K08019 08-Nov-99 08-Nov-99 EPA 8260A <br /> Methyl tort-butyl ether 850 20 " <br /> Di-ibopropyl ether ND 20 <br /> Ethvl tert-butyl ether ND 20 " <br /> tert-Amyl methyl ether ND 20 " <br /> R;ah, <br /> Dibroniofluoioniethane 880% 50-150 " <br /> S 'ie 1 2-Dichloroethane-44 72 0% 50-150 " <br /> VW4 (W910568-16)Water Sampled 26-OLt 99 17 25 Rete ved 27-Oct-99 13 50 <br /> tort-Butyl a1L01301 260 100 ugll 1 9KO8019 08-Nov-99 08-Nov-99 EPA 8260A <br /> Methyl tort-butyl ether 27 20 " <br /> Di-ibopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 " <br /> tert-Amyl inethyl ether ND 20 " <br /> Siniogate Dibromofluoiomethane 920% 50-150 " <br /> Siiiiogate 1,2-Dichloroethane-l4 800% 50-150 " <br /> S to Analytical- Walnut Creek 1'he results in tics report apply to rhe smnples analyzed i n Acord mce with the chain of <br /> c1131ody document This analytical report murt be reprodueedin its entirely <br /> se e-g ey, roject 9 <br /> Page 12 0f 19 <br />