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1 <br /> Sequoia 680 L"esapeake Drive Redwood City CA 9406a (650)364-9600 FAX(650)364-9233 <br /> 404 N Wiget lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921 0100 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792 0342 <br />' Pacific Environmental Group Client Project ICS Unocal 0123, Tracy, CA Sampled NIA <br /> 11315 Sunrise Gold Circle, Ste M Sample Descript Method Blank Received NIA,' <br /> Rancho Cordova, CA 95742 Analysis Method EPA 5030/8240 Analyzed Oct 19, 1998 <br />' Attention Mike Mitchener Lab Number BLK101998 Reported Oct 20, 1998 <br /> VOLATILE ORGANICS by GCIMS (EPA 8240) <br /> tAnalyte Reporting Limit Sample Results <br /> pg11kg Ng1k9 <br />' Acetone 500 N D <br /> Benzene 100 N D <br /> Bromodichloromethane 100 N D <br /> Bromoform 100 N D <br /> Bromomethane 100 N D <br /> 2-Butanone 500 N D <br /> Carbon disulfide 100 N D <br /> Carbon tetrachlonde - 100 N D <br /> Chlorobenzene 100 N D <br /> Chloroethane 100 N D <br />' Chloroform 100 N D <br /> Chloromethane 100 N D <br /> Dibromochloromethane 100 N D <br /> 1,1-Dichloroethane 100 N D <br />�1,2-Dichloroethane 100 N D <br /> j1,1-Dichlaroethene 100 N D <br /> cis-1,2-Dichloroethene 100 N D <br /> trans-1,2-Dlchloroethene 100 N D <br />' 1,2-Dichloropro pane 100 N D <br /> cis-1,3-Dichloropropen e 100 N D <br /> trans-1,3-Dichloropropene 100 N D <br /> Ethylbenzene 100 N D <br /> 2-Wexanone 500 N D <br /> Methylene chloride 250 N D <br /> 4-Methyl-2-pentanone 500 N D <br />' Styrene 100 N D <br /> 1,1,2,2-Tetrachloroethane 100 N D <br /> Tetrachloroethene 100 N D <br /> Toluene 100 N D <br />' 1,1,1-Trichloroethane 100 N D <br /> 1,1,2-Trichloroethane 100 N D <br /> Trichloroethene 100 N D <br /> Trichlorofluoromethane 100 N D <br />' Vinyl acetate 250 N D <br /> Vinyl chloride 100 N D <br /> Total Xylenes 100 N D <br /> 1 Analytes reported as N D were not detected at or above the reporting limit <br /> SEQUOIA ANALYTICAL, EPA#1210 Surrogate Recovery Limits Percent Recovery <br /> �f 1,2-Dichloroethane-D4 50-150% 92 <br /> Toluene-D8 50-150% 100 <br /> inda C Sc neider 4-Bromofluorobenzene 50-150% 100 <br /> Project Manager/Sacramento Laboratory <br /> K <br />' S810079 PES <2> <br />