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" 404 N Wlget Lane <br /> Sequoia w�fl�`Creek.X9560000 <br /> 4 FAX(925)988-9673 <br /> Analytical ""` w-seq oWahbscom <br /> Wer Ryan,Inc -Dubitn Project Chevron <br /> 6747 Sterna Court Suite J Project Number Chevron# 9-2033 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 29-Jun-00 16 29 <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 OE30010-EPA 5030B [P/TJ <br /> Blank(OE30010-BLK4) Prepared&Analyzed 05-Jun-00 <br /> Chloromethane ND 20 Ug/l. <br /> Vinyl chionde ND 10 " <br /> Bromomethane ND 10 " <br /> Chloroethane ND 10 " <br /> Tnchlorotluoromethane ND 050 <br /> Freon 113 ND to " <br /> I,]-Dichloroethene ND 10 " <br /> Methylene chloride ND 10 " <br /> trans 1,2-Dichloroethene ND 10 " <br /> l,l-Dichloroethane ND 10 " <br /> cis-1,2-Dichloroethene ND 10 " <br /> Chloroform ND 10 " <br /> 0Tnchloroethane ND 10 <br /> n tetrachlonde ND 10 <br /> 1,2-Dhchloroethane ND 20 " <br /> a <br /> Trichloroethene ND 10 " <br /> 1,2-Dichloropropane ND to " <br /> Bromodichloromethane ND 10 " <br /> cis-1,3-Dichloropropene ND I0 " <br /> trans-1,3-13ichloropropene ND 050 " <br /> 1,l,2-Trichloroethane ND 050 " <br /> Tetrachloroethene ND 10 " <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 050 " <br /> 1,3-Dichlorobenzene ND 050 " <br /> 1,4-Dichlorobenzene ND 10 " <br /> 1,2-Dichlorobenzene ND 20 " <br /> Surrogate Dibromodiuoromethane 920 100 920 50-150 <br /> Surrogate 4-Bromofluorobemene 980 100 980 50-150 <br /> Sequoia Analytical-Walnut Craik The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document.This analytical report must be reproduced in its entirety <br /> Page 16 of 21 <br />