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r <br /> 404 N W get lane <br /> Sequoia Walnut Geek CA 94598 <br /> (925)988-9600 <br /> �,,,,� Analytical FAX(925) 73 <br /> wwww sequolstabs alabs c om <br /> Gettler Ryan,Inc -Dubhn Project Chevron <br /> 6747 Sierra Court Suite J Project Number Chevron#9-2033 Reported <br /> Dublin CA,94569 Project Manager Deanna I Harding 29-Jun-00 16 29 <br /> Volatile Organic Compounds by EPA Method 8010B - Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reportmg Spike Source %REC RPD <br /> Analyte Result Linut Units Level Result %REC Limits RPD Limit Notes <br /> Batch OE30010-EPA 5030B [PIT] <br /> Blank(OE30010-BLK2) Prepared&Analyzed 31-May-00 <br /> Chloromethane ND 20 ug/1 <br /> Vinyl chloride ND 10 " <br /> Bromomethane ND 10 " <br /> Chloroethane ND 10 <br /> Tnchlorotluoromet$ane ND 050 <br /> Freon 113 ND 10 <br /> 1,1-Dichloroethene ND 10 " <br /> Methylene chloride ND 10 " <br /> trans-l,2-Dirhloroethene ND 10 " <br /> 1,1-Dichloroethane ND 10 " <br /> crs-1,2-Dichloroethene ND 10 " <br /> Chloroform ND 10 <br /> 11,1-Trichloroethane ND 10 <br /> Carbon tetrachloride ND 10 " <br /> 1,2-Dlchloroethane ND 2 0 " <br /> Tnchloroethene- ND-1 0-- <br /> 1,2-D3chloropropane ND 10 " <br /> Brornodrehloromethane ND 10 " <br /> cu-1,3-Dichloropropene ND 10 " <br /> trams-l,3-Dichloropropene ND 050 " <br /> 1,1,2-Trichloroethane ND 050 " <br /> Tetrachioroethene ND 10 " <br /> Dibromoehloromethane ND 050 " <br /> 1,2-Dibramoethane ND 10 " <br /> Chlorobenzene ND 10 " <br /> Brormfonn ND 050 " <br /> 1,2,3-Tnchloropropane ND 050 " <br /> 1,1,2,2-Tetrachloroethane- - - ND 050 -- <br /> 1,3-Drdrlorobettzene ND 050 " <br /> 1,4-Dichlorobenzene ND 10 " <br /> 1,2-Dichlorobenzene ND 20 " <br /> Surrogate Dibromodifluoromethane 860 100 860 50-150 <br /> Surrogate 4-Bromofluorobenzene 930 100 930 50-150 <br /> Sequoia Analytical-Walnut Creek The results in tits report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety 0 <br /> Page 15 of 21 <br />