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404 N Wiget Lane <br /> Sequoia Walnut`'251 9W4 <br /> 598 <br /> FAX(925)9$8-673 <br /> 5 Analytical www sequoialabs corn <br /> ttler Ryan,Inc -Dubhn Project Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal#0123 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 20-Jul-00 11 19 <br /> Volatile Organic Compounds by EPA Method 8010B <br /> Sequoia Analytical -Walnut Creek <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Nates <br /> U-2(W006495-03)Water Sampled 19-Jun-00 13 10 Received 20-.Tun-0017 30 <br /> Chloromethane ND 20 ug/1 1 0G03007 03-Jul-00 03-Jul-00 EPA 8010B <br /> Vinyl chloride ND 10 " <br /> Bromomethme ND 10 <br /> Chloroethane ND 10 " <br /> Trichlorofluoromethane ND 050 " <br /> Freon 113 ND 1 0 <br /> 1,1-Dichloroethene ND 16 " <br /> Methylene chloride ND 10 <br /> trans-1,2-Dichloroethene ND 10 " <br /> 1,1-Drchloroethane ND 10 <br /> cis-1,2-Dichloroethene ND 10 <br /> Chloroform ND 10 <br /> 1,1,1-Trichloroethane ND 10 " <br /> Carbon tetrachloride ND 10 <br /> 0Dichloroethane ND 20 <br /> hloroethene ND 10 " <br /> 1,2-Drchloropropane ND 10 <br /> Bromodnchloromethane ND 10 <br /> cis-1,3-Dichloropropene ND 10 <br /> trans-l,3-Drchloropropene ND 050 <br /> 1,1,2-Trichloroethane ND 050 " <br /> Tetrachloroethene 15 10 " <br /> Drbromochloromethane ND 050 " <br /> 1,2-Dibromoethane ND 10 " <br /> Chlorobenzene ND 10 <br /> Bromoform ND 050 <br /> 1,2,3-Trichloropropane ND 050 " <br /> 1,1,2,2-Tetrachloroethane ND 050 <br /> 1,3-Dichlorobenzene ND 050 " <br /> 1,4-Dichlorobenzene ND 10 <br /> 1,2-Dichlorobenzene ND 20 <br /> Surrogate Dibromodifluoromethane 830% 50-150 <br /> Surrogate 4 Bromofluorobenzene 820% 50-150 " <br /> Sequoia Analytical-Walnut Creek The results in this report apply to the samples mal med in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 7 of 20 <br />