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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N.Wiget 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 /> 455 cDoweAnalytical 11551 Induust ali1Road Rlvd.North,Ste. D San/Carlos CA 94070-4111 (6050) 232-9600 FAX(6uma,CA 94954 (77)792-1865 FAX 050)232-9612 <br /> SECOR International Project: ARCO 4493,Stockton,CA Sampled: 2110/99 to 2112199 <br /> 9912 Business Park Drive, Ste. 100 Project Number: N/A Received: 2116/99 <br /> Sacramento,CA 95827 Project Manager: Rusty Benkosky Reported: 312/99 <br /> Total Purgeable Hydrocarbons(C&02),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 /> MW-4 RIUronfinued) 5902231-18 SDA <br /> Benzene 9020246 2/19/99 2/19/99 0.00500 0.00548 mg/kg <br /> Toluene 0.00500 0.0115 " <br /> Ethylbenzene 0.00500 0-0142 " <br /> Xylenes(total) 0.00500 0.0698 <br /> Methyl tert-butyl ether 0.0500 0.0966 " <br /> Surrogate: a,a,a-Trifluorotoluene 60.0-140 84.0 <br /> MWA (W(W20 5902231-20 Soil <br /> Purgeable Hydrocarbons 9020254 2/22199 2/22199 1.00 1.80 mg/kg l <br /> Benzene 0.00500 ND " <br /> Toluene 0.00500 ND " <br /> Ethylbenzene 0.00500 ND " <br /> Xylenes(total) 0.00500 0.00554 " <br /> AShthyl tert-butyl ether 0.0500 1.74 " <br /> agate: a,a,a-Trifluorotoluene 60.0-140 103 <br /> MWA 25 S902231-21 S" <br /> Purgeable Hydrocarbons 9020254 2/22199 2/22/99 1.00 1.56 mg/kg 1 <br /> Benzene 0.00500 0.118 <br /> Toluene 0.00500 ND " <br /> Ethylbenzene 0.00500 0.234 i <br /> Xylenes(total) 0.00500 ND <br /> Methyl tert-butyl ether 0.0500 0.0763 " <br /> Surrogate: a,a,a-Trifluorotoluene 60.0-140 104 % <br /> 5J- S902231-22 Sail <br /> Purgeable Hydrocarbons 9020254 2122/99 2/22/99 1.00 30.0 mglkg I <br /> Benzene 0.00500 0.0840 <br /> Toluene 0.00500 0.0915 " <br /> Ethylbenzene 0.00500 0.382 <br /> Xylenes(total) 0.00500 1.50 <br /> Methyl tert-butyl ether 0.0500 ND <br /> Surrogate: a,a,a-Trifluorotoluene " " 60.0-140 123 % <br /> Sequoia Analytical- Sacramento *Refer to end of report for text of notes and definitions. <br /> Page 4 of 15 <br /> Sandra R.Hanson,Client Services Representative <br />