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, , m <br /> 404 N Wtget Lane <br /> Sequoia <br /> Walnut Creek �9� <br /> Ci) FAX(925)9W%73 <br /> www sequolalabs corn <br /> f6747 <br /> r Ryan,Inc -Dubhn Project Chevron <br /> ierra Court Suite J Project Number Chevron#9-8264 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 29-Dec-00 08 15 <br /> Volatile Organic Compounds by EPA Method 8010B- Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Li nits RPD Linut Notes <br /> Batch OL19005-EPA 5030B [PIT] <br /> Blank(OL19005-BLK4) Prepared&Analyzed 21-Dec-00 <br /> Chloromethane ND 20 ug/I <br /> Vinyl chloride ND 1 0 " <br /> Bromomethane ND 20 <br /> Chloroethane ND 10 " <br /> Trichlorofluoromethane ND 10 " <br /> Freon 113 ND 1 0 " <br /> 11-Dichloroethene ND 10 " <br /> Methylene chloride ND 10 " <br /> trans-l,2-Dichloroethene ND 10 " <br /> 41-Dichloroethane ND 10 " <br /> cis-1,2-Dichloroethene ND 10 " <br /> 10roform ND 10 n <br /> -Trichloroethane ND 10 <br /> Carbon tetrachloride ND 10 " <br /> I,2-Dichloroethane ND 20 " <br /> Trichloroethene ND 20 " <br /> 1,2-Dichloropropane ND 10 " <br /> Bromodichloromelhane ND 10 " <br /> cis-1,3-Dichloropropene ND 10 " <br /> trans-I3-Diohloropropene ND 10 <br /> 41,2-Trichloroethane ND 050 " <br /> Tetrachloroethene ND 10 " <br /> Dibromochloromethane ND 0 50 " <br /> 1,2-Dibromoethane ND 10 " <br /> Chlorobenzene ND 10 <br /> Bromoform ND 050 " <br /> 1,2,3-Trtchloropropane ND 050 " <br /> 1,1,2,2-Tetrachloroethane ND 10 " <br /> 1,3-Dichlorobenzene ND 050 " <br /> 1,4-Dichlorobenzene ND 20 " <br /> 1,2-Dichlorobenzene ND 20 " <br /> Surrogate Dibromod�ffuoromethane 940 100 940 50-150 <br /> Surrogate 4-Bromofluoroberaene 120 100 120 50.150 <br />�uoia Analytical-Walnut Creek The results in flus report apply to the samples mralwed in accordance with the chain of <br /> custody document This mullyhcal report must be reproduced in its entirety <br /> Page 15 of 22 <br />