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Sequoia 680 Cnesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-%00 FAX(92S)988-9673 <br /> Analytical 819 5tnker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1 86S FAX(707)792-0342 <br />' Pacific Environmental Group Client Project ID Unocal 012$, Tracy, CA Sampled~ Oct 6, 1998 ' <br /> 11315 Sunrise Gold Circle, Ste M Sample Descnpt Sod, SP-1-1,2,3,4 Composite Received Oct 7, 1998 <br /> Rancho Cordova, CA 95742 Analysis Method EPA 5030/8240 Analyzed Oct 19, 1998 <br />' Attention Mike Mitchener Lab Number S810079 -01 Reported Oct 20, 1998 <br /> VOLATILE ORGANICS by GC/MS (EPA 8240) <br />' Analyte Reporting Limit Sample Results <br /> Ng1kg Ng/kg <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 /> 243utanone 500 N D <br /> Carbon disulfide 100 N D <br />' Carbon tetrachloride 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 /> 1,1-Dichloroethene 100 N D <br /> cis-1,2-Dichloroethene 100 N D <br /> trans-1,2-Dichloroethene 100 N D <br />' 1,2-Dichloropropane 100 N D <br /> cis-1,3-Dichloropropene 100 N D <br /> trans-1,3-Dichloropropene 100 N D <br />' Ethylbenzene 100 N D <br /> 2-Hexanone 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 /> ' <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 /> ' 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 /> / 1,2-Dichloroethane-D4 50-150% 92 <br /> Toluene-D8 50-150% 100 <br /> Linda C Schneider 4-Bromofluorobenzene 50-150% 99 <br /> Project Manager]Sacramento Laboratory <br /> 5810079 PES <1> <br />