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404 N Wiget Lane <br /> Sequoia Walnut Creek CA 94598 <br /> 4 (925)988-%oo <br /> Ki) Analytical www <br /> equo 988-9673 <br /> sequoialabs corn <br /> J <br /> Gettler Ryan,Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite 7 Project Number Chevron#1 9-2033 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 15-Jun-01 10 47 <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 1E23001 -EPA 5030B [PIT] <br /> Blank(11E23001-BLK2) Prepared&Analyzed 24-May-O I <br /> Chloromethane ND 20 ug/l <br /> Vinyl chlonde ND 10 " <br /> Bromomethane ND 12 " <br /> Chloroethane ND 10 " <br /> Tnchlorofluoromethane ND 060 <br /> Freon 113 ND 10 " <br /> 1,1-Dichloroethenc ND 10 " <br /> Methylene chloride ND 10 " <br /> trans-l,2-Dichloroethene ND 10 " <br /> l,i-Dichloroethane ND 10 <br /> cis-l2-Dichloroethene ND 10 " <br /> Chloroform ND 10 <br /> 1,1,1-Tnchloroethane ND 10 " <br /> Carbon tetrachloride ND 10 " <br /> 1,2-Dtchloroethane ND 16 " <br /> --Trichloroethene_ _ ND— 11 - ----- _ —_-- _ <br /> 1,2-Dachloropropane ND 10 " <br /> Bromodichloromethane ND 10 " <br /> cis-1,3-Dichloropropene ND 10 " <br /> trans-l,3-Dichloropropenc ND 060 " <br /> 1,1,2-Tnchloroethane ND 050 " <br /> Tctrachloroethene ND 060 <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 060 <br /> 1,3-Dichlorobenzene ND 050 <br /> 1,2-Dichlorobenzene ND 12 <br /> Surrogate Dibromodiuoromethane 854 100 854 50-150 <br /> Surrogate 4-Bromofluorobenzene 925 100 925 50-150 <br /> Sequoia Analytical- Walnut Creek The results in this report apply to The samples analyzed in accordance with the chain <br /> custody document This analytical report must be reproduced in its entir <br /> Page 17 of 24 <br />