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Sequoia " ,CA 198 <br /> Walnut Geek,CA 9459$ <br /> (925)9W9600 <br /> Analytical FAX(925)98 <br /> www sequolalabs bs com coin <br /> Gettler 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 11 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 Lunt Units Level Result %REC Lunits RPD Limit Notes <br /> Batch 0G03007-EPA 5030B [P/TJ <br /> Blank(OG03007-BLK4) Prepared&Analyzed 29-Jun-00 <br /> Chloromethane ND 20 ug/1 <br /> Vinyl chlonde ND 10 <br /> Bromomethane ND 10 " <br /> Chloroethane ND 10 " <br /> Trichlorofluoromethane ND 050 " <br /> Freon 113 ND 10 " <br /> 1I-Dichloroethene ND 10 " <br /> Methylene chloride ND 10 " <br /> trans-l,2-Dichloroethene ND 10 <br /> 1,1-Dichloroethane ND 1 0 " <br /> cis-l2-Dichloroethene ND 10 " <br /> Chloroform ND 10 " <br /> 1 I1-Trchloroethane ND 10 • <br /> Carbon tetrachlonde ND 10 " <br /> 1,2-Dichloroethane ND 20 " <br /> Trichloroethene ND 10 " <br /> 1,2-Dichloropropane ND 10 " <br /> Bromodichlorornethane ND 10 <br /> cis-1,3-113ichloropropane =ND_ i 0 <br /> trans-1,3-Dichloropropene ND 050 " <br /> ,1,2-1,1.2 --" - <br /> - -- - _ --- �- — ND— -- 050__ <br /> Tetrachloroethene ND 10 " <br /> Dibromochloromethane ND 050 " <br /> 1,2-Dibromoethane ND to " <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 Dibromotb luoromethane 950 100 950 50.150 <br /> Surrogate 4-Bromofluorobenzene 910 100 920 50-150 <br /> Sequoia Analytical-Walnut Creek The results in dus report apply 10 the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety 0 <br /> Page 18 of 20 <br />