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Sequoia 680 Chesapeake Drive Redwood City.CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N."get Lane Walnut Creek CA 94598 (925)988-96W 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 /> SECOR International Project: ARCO 4493,Stockton,CA Sampled: 2/16199 <br /> 9912 Business Park Drive,Ste, 100 Project Number: N/A Received: 2/17/99 <br /> Sacramento,CA 95827 Project Manager: Rusty Benkosky Reported: 3/3/99 <br /> Volatile Organic Compounds by EPA Method 8260A <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Limits Limit Result Units Notes* <br /> MW-4 5902252-04 Water <br /> Benzene 9020304 2/26199 2/26/99 20.0 464 ug/l D <br /> Bromobenzene 20.0 ND D <br /> Bromochloromethane 20.0 ND D <br /> Bromodichloromethane 20.0 ND D <br /> Bromoform 20.0 ND D <br /> Bromomethane 50.0 ND D <br /> n-Butylbenzene 20.0 63.8 D <br /> sec-Butyl benzene 20.0 ND D <br /> tert-Butylbenzene 20.0 ND D <br /> Carbon tetrachloride 20.0 ND D <br /> Chlorobenzene 20.0 ND D <br /> Chloroethane 50.0 ND D <br /> Chloroform. 20.0 21.3 D <br /> Whlorotoluene <br /> romethane " " 50.0 ND " D 20.0 ND D <br /> 4-Chlorotoluene 20.0 ND D <br /> Dibromochloromethane 20.0 ND D <br /> 1,2-Dibromoethane 20.0 ND D <br /> Dibromomethane 20.0 ND D <br /> 1,2-Dibromo-3-chloropropane 50.1 ND D <br /> 1,2-Dichlorobenzene 20.0 ND D <br /> 1,3-Dichlorobenzene 20.0 ND D <br /> 1,4-Dichlorobenzene 20.0 ND D <br /> Dichlorodifluoromethane 50.0 ND D <br /> I,1-Dichloroethane 20.0 ND D <br /> 1,2-Dichloroethane 20.0 ND D <br /> l,l-Dichloroethene 20.0 ND D <br /> cis-1,2-Dichloroethene 20.0 ND D <br /> trans-1,2-Dichloroethene 20.0 ND D <br /> 1,2-Dichloropropane 20.0 ND D <br /> 1,3-Dichloropropane 20.0 ND D <br /> 2,2-Dichloropropane 20.0 ND D <br /> 1,1-Dichloropropene 20.0 ND D <br /> Ethylbenzene 20.0 668 D <br /> Hexachlorobutadiene 20.0 ND D <br /> Isopropylbenzene 20.0 59.2 D <br /> p-Isopropyltoluene 20.0 ND D <br /> Methylene chloride 50.0 ND D <br /> Naphthalene 50.0 342 D <br /> n-Propylbenzene 20.0 216 D <br /> rene 20.0 ND D <br /> equoia Analytical-Sacramento *Refer to end of report for tent of notes and definitions. <br /> Sandra R. Hanson,Client Services Representative Page 9 of 20 <br />