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is 1j <br /> Sequoia - - ---- - - - -- - - - - - 404 1V WiA Lane - <br /> F Walnut Creek CA 9459$ <br /> - - _ _ - _ _ _ _ � r _ (925)988-9600 <br /> '� 'v — „ ���"� = �' FAX(925) 988-9673 <br /> � Analytical _ T� _ <br /> , <br /> Gettler Ryan,lnc -Dublin Project Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal 4 5886 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 16-Dec-99 09 01 <br /> Volatile Organic Compounds by EPA Method�8260A <br /> Sequoia Analytical -Walnut Creek <br /> Reporting <br /> Analyte Result Limit Units' Dilution Batch Prepared Analyzed Method Notes <br /> mW-101(W912007-20)Water Sampled 29-Nov-99 12 50 Received 30-Nov-99 19 05 - <br /> Ethan0l T ND 500 ug/l 1 9L14011 09-Deo-99 09-Deo-99 EPA 8260A <br /> tent-Butyl alcohol ND 100 <br /> Methyl tert-butyl ether 25 20 " <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 20 " <br /> tent-Amyl methyl ether ND 20 <br /> Surrogate Dibromofluoromethane 126% 50-150 <br /> Surrogate 1,1-Dichloroethane-d4 124% 50-150 " <br /> MW-10D(W912007-21)Water Sampled 29-Nav-99 13 18 Received 30-Nov-99 19 05 <br /> Ethanol ND 500 ug/l i 9L14011 09-Deo-99 09 Deo-99 EPA 8260A <br /> tert-Butyl alcohol ND 100 " <br /> Methyl tert-butyl ether 26 20 " <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 20 <br /> tert-Amyl methyl ether ND 20 <br /> Surrogate Dibromofuoromethane 128 % 50-150 " <br /> Surrogate 1,1-Dichloroethane-d4 124% 50-150 " <br /> Sequoia Analytical-Walnut Creels The results in this report apply to the swnples analyzed i n accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> u mute eg ey, &oject anagen <br /> Page 20 of 27 <br />