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IDSequoia Walnut Creek,CA 94598 <br /> (925)988-9600 <br /> I,w Analytical FAX(925)slabs 73 <br /> www sequokalabs w <br /> Gettler Ryan,Inc -Dublin Project Unocal <br /> 6747 Sierra Court Suite 7 Project Number Unocal#0123 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 07-APT-00 15 41 <br /> Volatile Organic Compounds by EPA Method 8010B- Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lumt Units Level Result %REC Lunits RPD Lumt Notes <br /> Batch OC28007-EPA 5030B[PIT] <br /> Blank(OC28007-BLKI) Prepared&Analyzed 28-Mar-00 <br /> Chloromethane ND 20 ug/1 <br /> Vmyt chloride ND 10 " <br /> Bromomethane ND 10 " <br /> Chloroethane ND 10 " <br /> Trichlorofluoromethane ND 050 " <br /> Freon 113 ND 10 " <br /> 1,1-Dichloroethene ND 10 " <br /> Methylene chloride ND 50 " <br /> trans-l,2-Dichloroethene ND 10 " <br /> 1,1-Dichloroethane ND 10 " <br /> cis-1,2-Dichloroethene ND 10 • <br /> Chloroform ND 10 " <br /> 1,1,1-Tnchloroe0me ND 10 " <br /> Carbon tetrachlonde ND 10 " <br /> 1,2-Dichloroethane ND 20 " <br /> Trichloroethene ND ]0 " <br /> —1,2-Dichloropropane -ND-1 0 " <br /> =Bromodwhloromethane ND— 10 1- <br /> cis-1.3-Dichloropropene <br /> cis-1,3-Dichloropropene ND 10 <br /> tins-l,3-Dichloropropene ----ND _ 050 - - - — - - - -- - - - — <br /> 1,1,2-TnohiorocOme ND 050 " <br /> Tetrachloroethene ND 10 " <br /> Dibromochloromelhane ND 050 " <br /> 1,2-Dibromoethane ND 10 " <br /> Chlorobenzene ND 10 <br /> Bromofotm ND 050 " <br /> 1,1,2,2-TeU=hloroethane ND 050 " <br /> 1,3-Dichlorobenzene ND 050 " <br /> 1,4-Dichlorobenzene ND 10 " <br /> 1,2-Dichlorobenzene ND 20 <br /> Surrogate Dibromodrfluoromethane 700 100 700 so-Iso <br /> Surrogate 4-Bromofluorobenzene 630 !00 630 50-150 <br /> Sequoia Analytical-walnut Creek The results to thus report apply to the samples analyzed to accordance with the chain of <br /> custody document This analytical report must be reproduced in its enfirwy <br /> Page 16 of 18 <br />