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Sequoia 6BO Chesapeake Drive Redwood City,CA 94063 1650)364-9600 FAX(650)364-9233 <br /> 404 N.Wlget Lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd. North,Ste. D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 1551 Industrial Road San Carlos,CA 94070-41 1 1 (650)232-9600 FAX(650)232-9612 <br /> SECOR Intemational Project: ARCO 4493,Stockton,CA Sampled: 2/24/99 to 2/25199 <br /> 9912 Business Park Drive,Ste 100 Project Number, NIA Received: 2/26/99 <br /> Sacramento,CA 95827 Project Manager: Rusty Benkosky Reported: 3/5/99 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Limits Limit Result Units Notes* <br /> PG-1 (continued) 5403005-19 5411 <br /> Toluene 9030049 3/2/99 3/2/99 0.00500 0.0176 mg/kg <br /> Ethylbenzene 0.00500 0.0999 " <br /> Xylenes(total) 0.00500 0.0917 " <br /> Methyl tert-butyl ether 0.0500 ND " <br /> Surrogate: a,a,a-Trifluorotoluene 60.0-140 96.0 % <br /> PG-2 S903005-20 SIW <br /> Purgeable Hydrocarbons 9030049 3/2/99 3/2/99 1.00 2.27 mg/kg 2 <br /> Benzene 0.00500 ND " <br /> Toluene 0.00500 0.0104 " <br /> Ethylbenzene 0.00500 0.0225 " <br /> Xylenes(total) 0.00500 0.0255 " <br /> Methyl tert-butyl ether 0.0500 ND " <br /> gate: a,a,a-Triuorotoluene 60.0-140 94.5 % <br /> ro <br /> 5903005-21 SAA <br /> Purgeable Hydrocarbons 9030049 3/2/99 3/2/99 1.00 5.08 mg/kg 2 <br /> Benzene 0.00500 0.00622 " <br /> Toluene 0.00500 0.0237 " <br /> Ethylbenzene 0.00500 0.0419 " <br /> Xylenes(total) 0.00500 0.0568 <br /> Methyl tert-butyl ether 0.0500 ND " <br /> Surrogate: a,a,a-Trifluorotoluene 60.0-140 101 % <br /> PG-4 5903005-22 54'11 <br /> Purgeable Hydrocarbons 9030049 3/2/99 3/2/99 1.00 ND mg/kg <br /> Benzene 0.00500 ND " <br /> Toluene 0.00500 ND " <br /> Ethylbenzene 0.00500 ND " <br /> Xylenes(total) 0.00500 ND " <br /> Methyl tert-butyl ether 0.0500 ND " <br /> Surrogate: a,a,a-Trifluorotoluene 60.0-140 92.5 % <br /> SP1„A,B,C.D(cam oslte) 5903005-28 S" <br /> Purgeable Hydrocarbons 9030049 3/2/99 3/2/99 10.0 179 mg/kg 2,D <br /> Benzene 0.0500 0.327 D <br /> Toluene 0.0500 0.491 D <br /> Ethylbenzene 0.0500 3.15 D <br /> Xylenes(total) 0.0500 13.8 D <br /> Methyl tert-butyl ether 0.500 0.708 D <br /> Surrogate: a,a,a-Trifluorotoluene 60.0-14092.0 % <br /> equoia Analytical -Sacramento *Refer to end of report for text of notes and definitions. <br /> /o /C ;1 <br /> Sandra R. Hanson,Client Services Representative Page 7 of 21 <br />