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r <br /> 404 N Wiget Lane <br /> Sequoia Walnut Creek CA 94598 <br /> (925)988-9600 <br /> FAX(925)988-9673 <br /> I ,,,V Analytical wwwsequolalabs corn <br /> Gettler Ryan Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite J Project Number Chevron B 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—L-imit---1_lnits Level---Result—%REC—Limits-.—RPD—Limit—Notes— <br /> Batch IG25008- EPA 5031113 lP/l J <br /> Blank(1G25008-BLK1) _-Prepared& Analyzed 25-Jul-01 <br /> Chloromethane - --- -- -� - - - ND -- 20 T Ug/1 <br /> Vinyl chloride - - - - -ND - .- I0 - 1.-- -- - - - - <br /> Bromomethane ND 12 " <br /> Chloroethane ND 1 0 " <br /> Trichlorofluoromethane ND 060 " <br /> Freon 113 ND 10 " <br /> 1,1-Dichloroethene ND l0 " <br /> Methylene chloride ND 10 <br /> trans-1,2-Dichloroethene ND 10 " <br /> I I-Dichloroethane ND 10 " <br /> cis-1,2-Dichloroethene ND 10 " <br /> Chloroform ND 10 " <br /> 1,1 I-Trichloroethane ND 1 0 <br /> Carbon tetrachloride ND 10 " <br /> 1,2-Dichloroethane ND 16 " <br /> Trichloroethene ND 1I <br />_1,Z-Dichloropropane ND 10 " <br /> Bromodichloromahane ND 10 " <br /> cis-1,3-Dichloropropene T - ND—I.. I 0 " <br /> trans-l,3-Dichloropropene � -� ND O 60 <br /> 1,1,2-Trichloroethane- - -- - - --ND— --0 50--- - <br /> Tatrachloroethene ND 060 " <br /> Dibromochloromethane ND 050 " <br /> 1,2-Dibromoethane ND 10 " <br /> Chlorobenzene ND to " <br /> Bromoform ND 050 " <br /> 1,2,3-Tnchioropropane 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 Dibromod fluoromethane 866 100 86 6 50-150 <br /> Surrogate 4-Bromofluorobenzene 687 100 68 7 50-150 <br /> Sequoia Analytical - Walnut Creek The results to this report apply to the samples analyzed to accordance with the chain of <br /> custody document This analytical report must be reproduced in ds entrreo <br /> Page 16 of 24 <br />