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• ao <br /> DSequoia 404 ,CA Lane <br /> Walnut Creek,CA 94598 <br /> Analytical FAX 988-9600 <br /> {925} 988-9673 <br /> Gettler Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco(Unocal)116981 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 23-Nov-99 16 42 <br />-- --- - - - —— -Volatile Organic Compounds byTPA Method-8260A- <br /> -Sequoia <br /> ethod-8260A-Sequoia Analytical -Walnut Creek <br /> Reporting <br /> Analyte Result Liruit Units Dilution Batch Prepared Analyzed Method Notes <br /> VW-7(W910568-17)Water Sampled 25-Oct-99 17 45 Received 27-Oct-99 13 50 <br /> lent-Butyl alcohol ND 100 ug/1 1 9KO8019 08-Nov-99 08-Nov-99 EPA 8260A <br /> Methyl tert-butyl ether 47 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 <br /> 1,2-Dichloroethane ND 20 " <br /> tert-Amyl methyl ether ND 20 <br /> Ethylene dibromide ND 20 " <br /> Surrogate Dibromo,Jluoromethane 820% 50-150 " <br /> Surrogate 1,2-Dichloroethane-d4 620% 50-150 IF " <br /> PTW-1 (W910568-18)Water Sampled 26-Oct-99 16 00 Received 27-Oct-99 13 50 <br /> tert-Butyl dlcohol ND 100 ug/l 1 91008019 08-Nov-99 08-Nov-99 EPA 8260A <br /> Methyl tert-butyl ether ND 20 " <br /> Di-iaopropvl ether ND 20 IF <br /> Ethyl ten-butvl ether ND 20 " <br /> tert-Amyl methyl ether ND 20 • <br /> Surrogate Dibromci luvroniethane 800% 50-150 " <br /> Surrogate 12-Dichloroethane-d4 640% 50-150 " <br /> Sequoia Analytical- Walnut Creek The reswIts in thrs report apply to the scmples analyzed i n accor&wce with the chran a <br /> custody document This analytical report nwt be reproduced in its entire <br /> +Ue ag ey, Project ariaer Page 13 of 19 <br />