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404 N Wiget Lane <br /> D Sequoia Walnut Creek,CA 94598 <br /> (925)988-9600 <br /> 73 <br /> Analytical <br /> FAX equo labsc m <br /> www sequolalabs coin <br /> er Ryan,Inc -Dublin Project 'Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco SS# 5886 <br /> Reported <br /> Dublin CA,94568 <br /> Project Manager Deanna L Harding 26-Feb-01 07 38 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical -Walnut Creek <br /> Reporting <br /> Analyte Result Linut Units Dilution Batch Prepared Analyzed Method Notes <br /> CC-AP(W102184-05)Water Sampled 07-Feb-01 1105 Received 08-Feb-01 15 45 <br /> Ethanol ND 5000 ug/1 10 1809007 12 Feb-01 12-Feb-01 EPA 8260E <br /> tett-Baty!alcohol 14000 10000 200 <br /> Methyl tert-butyl ether 110000 1000 500 13-Fab-01 ^ <br /> Di-isopropyl ether ND 20 10 " <br /> 12-Feb-01 " <br /> Ethyl tert-butyl ether ND 20 <br /> tert-Amyl methyl ether 47 20 <br /> 1,2-Dlchloroethane ND 20 <br /> Ethylene dibromnde ND 20 <br /> Surrogate Dtbromofluoromethane 110% 50-150 <br /> Surrogate 12-Drchlaroethane-d4 920% 50-150 <br /> VT-PW(W102184-06)Water Sampled 07-Feb-01 11 15 Received 08-Feb-01 15 45 <br /> Ethanal ND 5000 ug/1 10 IB09007 12-Feb-01 12-Feb-01 EPA 8260B <br /> tert-Butyl alcohol 11000 10000 200 <br /> Methyl tert-butyl ether 96000 1000 500 13-Feb-01 „ <br /> ropy]ether ND 20 10 12-Feb-o1 <br /> E tert-butyl ether ND 20 " <br /> tert-Amyl methyl ether 36 20 <br /> 1,2-Dichloroethane ND 20 „ <br /> Ethylene drbromide ND 20 " <br /> Surrogate Drbromofluoromethane 110% 50-150 " ^ <br /> Surrogate 12-Dichloroethane-d4 960% 50-150 <br /> Sequoia Analytical-Walnut Creek The results un tlps report apply to the samples analyzed in accordance with the chain of <br /> custody documem This analytical report must be reproduced{n tis entirety <br /> Page 3 of 10 <br />