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i <br /> 404 N Wiget Lane <br /> Walnut Geek CA 94598 <br /> Sequoia (925)988-9600 <br /> FAX(925)988-9673 <br /> 1%W Analytical sequolalabs coin <br /> ttler Ryan,Lnc -Dublin Project Chevron <br /> 6747 Sierra Court Suite J Project Number Chevron#9-2033 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 12-Mar-01 07 45 <br /> Volatile Organic Compounds by EPA Method 8010B- Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Linut Units Level Result %REC Linuts RPD Lunit Notes <br /> Batch 1B22003- EPA 5030B [PIT] <br /> Blank(1B22003-BLK2) Prepared&Analyzed 23-Feb-01 <br /> Chloromethane ND 20 ugA <br /> Vinyl chloride ND 1 0 " <br /> $romomethane ND 12 " <br /> Chloroethane ND 10 " <br /> Tnchlorofluoromethane ND 060 " <br /> Freon 113 ND 1 0 " <br /> ]J-Dichloroethene ND 1 0 <br /> Methylene chloride ND 10 " <br /> trans-l,2-Dichloroethene ND 10 " <br /> 1-Dichloroethane ND 10 " <br /> cis-1,2-Dichloroethene ND 10 " <br /> Chloroform ND 10 " <br /> LI-Trichloroethane ND 10 " <br /> tetrachloride ND 10 <br /> 1,2-Dichloroethane ND 16 " <br /> Tnchlomethenc ND 20 " <br /> 1,2-Dichloropropane ND 10 " <br /> Bromodichloromethane ND 10 " <br /> cis-1,3-Dichloropropene ND 10 " <br /> trans-1,3-Dichloropropene ND 060 " <br /> 1,1,2-Tnchloroethane ND 050 " <br /> Tetrachloroethene ND 060 " <br /> Dibromochloromethane ND 050 " <br /> 1,2-Dibromoethane ND 10 " <br /> Chlorobenzene ND 10 " <br /> Bromofonn ND 050 " <br /> 1,2,3-Tnchloropropane ND 050 " <br /> 1,1,2,2-Tdrachloroethane ND 060 " <br /> 1,3-Dichlorobenzene ND 050 " <br /> 1,4-Dichlorobenzene ND 12 " <br /> 1,2-Dichlorobenzene ND 12 " <br /> Surrogate IDibromodifluoromethane 110 100 110 50-150 <br /> Surrogate 4 Bromofluorobenzene 883 100 883 50-150 <br /> Sequoia Analytical-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 12 of 25 <br />