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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (4 15) 364 9600 FAX (415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510) 988 9673 <br /> Analytical 819 Straker Avenue Suite 8 Sacramento CA 95834 (916) 92 F 9600 FAX(9161 921 0100 <br /> 40 <br /> Touchstone Developments Client Prol ID Chevron 9-4183 /9-4183 Sampled 04/10/96 <br /> 781 Kingston Ave Sample Descnpt UOSP-2(A-D) Received 04/10/96 <br /> Oakland, CA 94611 Matrix SOLID Extracted 04/16/96 <br /> Analysis Method EPA 8240 Analyzed 04/16/96 <br /> Attention Robert Mallory Lab Number 9604898-07 Reported 04119/96 <br /> OC Batch Number MSO410968240EXA <br /> Instrument 10 F3 <br /> Volatile Organics (EPA 8240) <br /> Analyte Detection Limit Sample Results <br /> ug/Kg ug/Kg <br /> Acetone 1000 <br /> ND <br /> Benzene 200 500 <br /> Bro mod i chlorom ethane 200 N D <br /> Bromoform 200 N D <br /> Bromomethane 200 N D <br /> 2-Butanone 1000 N D <br /> Carbon disulfide 200 N D <br /> Carbon tetrachloride 200 N D <br /> Chlorobenzene 200 N D <br /> Chloroethane 2D0 N D <br /> 2-Chloroethyl vinyl ether 1000 N D <br /> Chloroform 200 N D <br /> aCloromethane 200 N D <br /> omochloromethane 200 N D <br /> Dichloroethane 200 N D <br /> 1,2-Dichloroethane 200 N D <br /> 1,1-Dichloroethene 200 N D <br /> cls-1,2-Dlchloroethene 200 N D <br /> trans-1,2-DichIoroethene 200 N D <br /> 1,2-Dichloropropane 200 N D <br /> cis-1,3-Dichloropropene 200 N D <br /> trans-1,3-Dichloropropene 200 N D <br /> Ethylbenzene 200 3900 <br /> 2-Hexanone 1000 N D <br /> Methylene chloride 500 N D <br /> 4-Methyl-2-pentanone 1000 N D <br /> Styrene 200 N D <br /> 1,1,2,2-Tetrachloroethane 200 N D - <br /> Tetrach loroethe n e 200 2400 <br /> Toluene 200 7400 <br /> 1,1,1-Trichloroethane 200 N D <br /> 1,1,2-Trichloroethane 200 N D <br /> Trichloroethene 200 N D <br /> Trichlorofluoromethane 200 N D <br /> Vinyl acetate 500 N D <br /> Vinyl chloride 200 N D <br /> 46 <br /> SEQUOIA ANALYTICAL <br /> Page 12 <br />