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680 Chesapeake Drive Redwood City,CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N.Wiget Lane Walnut Creek,CA 94598 (925)M-9600 FAX(925)988-%73 <br /> 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 455 McDowell Blvd. North,Ste. D Petaluma,CA 94954 (707)792-1865 FAX(707) 792-0342 <br /> Analytical 11551 551 Industrial Road San Carlos,CA 94070-41 l 1 (650)232-9600 FAX(650)232-9612 <br /> SECOR International Project: ARCO 4493,Stockton,CA Sampled: 4/13/99 <br /> 9912 Business Park Drive,Ste. 100 Project Number: NIA Received: 4114/99 <br /> Sacramento,CA 95827 Project Manager: Rusty Benkosky Re orted: 4/19199 <br /> Volatile Organic Compounds by EPA Method 8240B <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> [Analyte Number Prepared Analyzed Limits Limit Result Units Notes° <br /> WO-1 (com_pQsitcl 5904201-02 SAW <br /> Acetone 9040173 4115199 4/15199 500 ND ug/kg <br /> Benzene " 100 112 " <br /> Bromodich to ro methane l00 ND " <br /> Bromoform " " " 100 ND " <br /> Bromomethane 100 ND " <br /> 2-Butanone 500 ND " <br /> Carbon disulfide 100 ND " <br /> Carbon tetrachloride 100 ND " <br /> Chlorobenzene 100 ND " <br /> Chloroethane l00 ND " <br /> 2-Chloroethylvinyl ether S00 ND " <br /> Chloroform 100 ND " <br /> Chloromethane 100 ND " <br /> #romoch loro methane " 100 ND <br /> Dichloroethane too ND <br /> Dichloroethane 100 ND <br /> I,I-Dichloroethene 100 ND " <br /> I <br /> cis-1,2-Dichloroethene 100 ND " <br /> trans-1,2-Dichloroethene l00 ND " <br /> 1,2-Dichloropropane 100 ND " <br /> cis-1,3-Dichloropropene 100 ND " <br /> trans-l,3-Dichloropropene 100 ND " <br /> Ethylbenzene 100 ND " <br /> 2-liexanone 500 ND " <br /> Methylene chloride 250 ND " <br /> 4-Methyl-2-pentanone 500 ND " <br /> Styrene 100 ND " <br /> 1,1,2,2-Tetrachloroethane 100 ND " <br /> Tetrachloroethene 100 ND " <br /> Toluene 100 201 " <br /> 1,1,1-Trichloroethane 100 ND " <br /> l,1,2-Trichloroethane l00 ND " <br /> Trichloroethene 100 ND " <br /> Trichlorofluoromethane 100 ND " <br /> Vinyl acetate 250 ND " <br /> Vinyl chloride 100 ND " <br /> Total Xylenes 100 143 " <br /> Surrogate: Dibromofluoromethane 70.0-130 95.2 YO <br /> Surrogate: 1,2-DC444 70.0-130 95.6 " <br /> Surrogate: Toluene-d8 70.0-130 95.6 <br /> Surrogate. 4-BFB 70.0-130 83.6 " <br /> uoia Analytical-Sacramento *Refer to end of report for text of notes and definitions. <br /> A/0 2 <br /> C� <br /> Sandra R. Ranson,Client Services Representative Page 4 of 12 <br />