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Sequoia CA 404 N Lane <br /> Walnut Creek CA 94598 <br /> 4 (925)988-9600 <br /> Analytical www <br /> (925) 73 <br /> sequolalabs alabs corn <br /> f6747 <br /> tter Ryan, Inc - Dublin Project Chevron <br /> Sierra Court Suite J Project Number Chevron# 9-8264 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 06-Aug-01 09 54 <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 Limits RPD Limit Notes <br /> Batch 1G25008- EPA 5030B JP/TJ <br /> Blank(IG25008-BLK3) Prepared&Analyzed 27-Jul-01 <br /> - <br /> Vinyl chloride ND 10 " <br /> Bromomethane ND 12 " <br /> Chloroethane ND 1 0 " <br /> Trichlorofluoromethane ND 060 " <br /> Freon 113 ND 10 " <br /> 1,1-Dichloroethene ND 10 " <br /> Methylene chloride ND 10 <br /> trans-l,2-Dichloroethene ND to " <br /> 1 1-Dichloroethane ND l0 " <br /> cis-1,2-Dichloroethene ND I0 " <br /> loroform ND 10 " <br /> -Trichloroethane ND 1 0 <br /> Carbon tetrachloride ND 1 0 " <br /> 1,2-Dichloroethane ND 1 6 " <br /> Trichloroethene ND 1 I " <br /> 1,2-Dichloropropane ND 10 " <br /> Bromodichloromethane ND 10 " <br /> c3s-1,3-Dichloropropene ND 10 " <br /> trans-1,3-Dichloropropene ND 060 " <br /> 1,1,2-Trichloroethane ND 050 " <br /> Tetrachloroethene ND 060 " <br /> Dibromochloromethane 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 060 " <br /> 1,3-Dichlorobenzene ND 050 " <br /> 1,4-Dichlorobenzene ND 12 " <br /> 1,2-Dichlorobenzene ND 12 " <br /> Surrogate Dibromodiuoromethane 8 97 — too 897 50-150 <br /> Surrogate 4-Bromofluorobenzene 837 too 83 7 50-150 <br /> quota Analytical -Walnut Creek The results in This report apply to the samples analyzed to accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 17 of 24 <br /> r� <br />