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4T) Sequoia 404 N ,CA Lane <br /> (925)Walnut Creek,CA 94598 <br /> �„� Analytical FAX(925)988-96703 <br /> Gettler Ryan,Inc -Dublin Project Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal#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-9I(W912007-17)Water Sampled 29-Nov-99 14 15 Received 30-Nov-99 19 05 <br /> Ethanol ND 500 ug1l 1 9L14011 09-Dec-99 09-Dec-99 EPA 8260A <br /> tert-Butyl alcohol ND 100 " <br /> Methyl tert-butyl ether ND 2 0 <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 " <br /> tert-Amyl methyl ether ND 2 0 <br /> Surrogate Dibromofluoromethane 124 % 50-150 " <br /> Surrogate 1,2-Dichloroethane-d4 122% 50-150 <br /> MW-9D(W912007-18)Water Sampled 29-Nov-99 14 42 Received 30-Nov-99 19 05 <br /> Ethanol ND 500 ug/1 1 9L14011 09-Dec-99 09-Dec-99 EPA 8260A <br /> tert-Butyl alcohol ND 100 <br /> Methyl tert-butyl ether ND 20 " <br /> Dl-isopropyl ether ND 20 <br /> 1 tert-butyl ether ND 20 " <br /> Amyl methyl ether ND 20 <br /> Surrogate Dibromofluoromethane 124% 50-150 " <br /> Surrogate 1,2-Dichloroethane-d4 122% 50-150 <br /> MW-10S(W912007-19)Water Sampled 29-Nov-99 12 28 Received 30-Nov-99 19 05 <br /> Ethanol ND 500 ug/l 1 9L14011 09-Dec-99 09-Dec-99 EPA 9260A <br /> tett-Butyl alcohol ND 100 <br /> Methyl tent-butyl ether 85 20 <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 20 <br /> tert-Amyl methyl ether ND 20 " <br /> Surrogate Dibromofluoromethane 124% 50-150 <br /> Surrogate 1,1-Drchloroethane-d4 122 % 50-150 " <br /> uoia Analytical-Walnut Creek The results in this report apply to the samples analyzed to accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> 74F Aammneg ey, oject anagen <br /> Page 19 of 27 <br />