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444 N Wlget Lane <br /> Sequoia Walnut Creek CA <br /> (925)988-9600-%00 <br /> 14 FAX(925)988-%73 <br /> 1 Analytical www sequolalabs com <br /> ttler Ryan,Inc -Dublin 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 i l 19 <br /> Volatile Organic Compounds by EPA Method 8010B- Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> ,Analyte Result Lurnt Units Level Result %REC Limits RPD Lmut Notes <br /> Batch 0603007-EPA 5030B[PPT] <br /> Blank(OG03007-BLK3) Prepared&Analyzed 03-Jul-00 <br /> Chloromethane ND 20 ug/I <br /> Vinyl chloride ND 1 0 " <br /> Bromomethane ND 10 " <br /> Chloroethane ND 10 " <br /> Trichlorofluoromethane ND 050 " <br /> Freon 113 ND 10 " <br /> I,]-Dichloroethene ND 10 " <br /> Methylene chlonde ND 10 " <br /> trans-l,2-Dichloroelhene ND 10 " <br /> IJ-Dichloroethane ND 10 " <br /> cm-1,2-Dichloroethene ND 10 " <br /> Ioroform ND 10 " <br /> -Tnchloroelhane ND 10 " <br /> arbon tetrachloride ND 10 " <br /> 1,2-Dichloroethane ND 20 " <br /> Trichloroethene ND 10 " <br /> 1,2-Dichloropropane ND 10 " <br /> Bromodichlommethane ND 10 <br /> cis-1,3 Diehloroprapene ND 10 " <br /> trans-1,3-Dichloropropene ND 0 50 " <br /> 1,1,2-Trichloroethane ND 050 " <br /> Tetrachloroethene ND 10 " <br /> Dibromochloromethane ND 050 " <br /> 1,2-Dibromoethane ND 10 " <br /> Chlorobenzene ND 10 " <br /> Bromoform ND 050 " <br /> 1,2,3-Tnchloropropane 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 Dibromod!fluoromethane 920 100 920 50.150 <br /> Surrogate 4-Bromo luoroberaene 940 100 940 50-150 <br /> ag11o1a Analytical-Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 17 of 20 <br />