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4 <br /> 404 N 1Mget Lane <br /> Sequoia Walnut Creek( )988-9600 <br /> t 4 <br /> 4 fAX(925)988-9673 <br /> a- ) Analytical www se'uoia1abs Cor <br /> dw <br /> Gettler Ryan,Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite 3 ProlectNumber Chevron# 9-8264 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 29-Dec-00 08 15 <br /> Volatile Organic Compounds by EPA Method 8010B - Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lunit Units Level Result %REC Lunits RPD Lulut Notes <br /> Batch OL19005 -EPA 5030B [P/TJ <br /> Blank(OL19005-BLK2) Prepared&Analyzed 20-Dec-00 <br /> Chloromethane ND 20 ng/l <br /> Vinyl chloride ND 10 <br /> Bromomethane ND 20 " <br /> Chloroethane ND 10 " <br /> Trichlorofluoromethane ND 10 " <br /> Freon 113 ND 10 <br /> 1,1-Dichloroethene ND l0 " <br /> Methylene chloride ND 10 " <br /> trans-l,2-Dichloroethene ND 10 " <br /> 1,1-Dichloroethane ND 10 " <br /> cis-l2-Dichloroethene ND 100 " <br /> roform ND 10 " <br /> -Tnelloroethane ND 10 " <br /> Carbon tetrachloride ND 1 0 " <br /> 1,2-Dichloroethane ND 20 " <br /> Trichloroethene ND 20 " <br /> 1,2-Dichloropropane ND 10 " <br /> Bromodichloromethane ND 1 0 " <br /> cis-1,3-Dichloropropene ND 1 0 " <br /> trans-l,3-Dichloropropene ND 10 " <br /> 1,1,2-Trichloroethane ND 050 " <br /> Tetraddoroeihene ND 10 " <br /> Dibromochloromethane ND 050 " <br /> 1,2-Dibromoethane ND 10 " <br /> Chlorobenzene ND 10 " <br /> Brornoform ND 050 " <br /> 1,2,3-Tnchloropropane ND 050 " <br /> 1,1,2,2-Tetrachloroethane ND 10 " <br /> 1,3-Dichlorobenzene ND 050 " <br /> 1,4-Dichlorobenzene ND 20 " <br /> 1,2-Dichlorobenzene ND 20 " <br /> Surrogate Drbromodifluorvinethane 650 100 650 50-150 <br /> Surrogate 4-Bromofluorobenzene 100 100 100 50.150 <br />�uola Analy#ical-Walnut Creek 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 13 of 22 <br />