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Sequoia 690 Chesapeake Drive Redwood City CA CA 94063 (650) 364-96FAX(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 ID Tosco 5417, Manteca, CA Sampled N/A <br /> 11315 Sunrise Gold Circle, Ste M Sample Descript Method Blank Received N/A <br /> Rancho Cordova, CA 95742 Analysis Method EPA 5030/8240 Analyzed Sep 1, 1998 <br /> Attention Mike Mitchener Lab Number BLK082798 Reported Sep 4, 1998 <br /> VOLATILE ORGANICS by GC/MS (EPA 8240) <br /> Analyte Reporting Limit Sample Results <br /> lrg/L Ng/L <br /> MTBE 20 N D <br /> Acetone 10 N D <br /> Benzene 20 N D <br /> Bromodichloromethane 20 N D <br /> Bromoform 20 N D <br /> Bromomethane 20 N D <br /> 2-Butanone 10 N D <br /> Carbon disulfide 20 N D <br /> Carbon tetrachloride 20 N D <br /> Chlorobenzene 2 0 N D <br /> Chloroethane 20 N D <br /> Chloroform 20 N D <br /> Chloromethane 20 N D <br /> D i bromo chloro methane 20 N D <br /> 1,1-Dichloroethane 20 N D <br /> 1,2-Dichloroethane 2 0 N D <br /> 1,1-Dichloroethene 20 N D <br /> cis-1,2-Dichloroethene 20 N D <br /> trans-1,2-Dichloroethene 20 N D <br /> 1,2-DichI oro propane 20 N D <br /> cis-1,3-Dichloropropene 20 N D <br /> trans-1,3-Dichloropropene 20 N D <br /> Ethylbenzene 20 N D <br /> 2-Hexanone 10 N D <br /> Methylene chloride 50 N D <br /> 4-Methyl-2-pentanone 10 N D <br /> Styrene 20 N D <br /> 1,1,2,2-Tetrachloroethane 20 N D <br /> Tetrachloroethene 20 N D <br /> Toluene 20 N D <br /> 1,1,1-Trichloroethane 20 N D <br /> 1,1,2-Trichloroethane 20 N D <br /> Trichloroethene 20 N D <br /> Trichlorofluoromethane 20 N D <br /> Vinyl acetate 5 0 N D <br /> Vinyl chloride 20 N D <br /> Total Xylenes 20 N D <br /> Analytes reported as N D were not detected at or above the reporting limit <br /> SEQU 1A ANALYTICAL, EPA#1271 Surrogate Recovery Llmds Percent Recovery <br /> 1,2-Dichloroethane-D4 50-150% 94 <br /> Toluene-D8 50-150% 98 <br /> XindaCSchneider 4-Bromofluorobenzene 50-150% 96 <br /> Project Manager/Sacramento Laboratory <br /> Cencoeo ore ��� <br />