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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 McDowell Blvd. North,Ste.D Petaluma,CA 94954 (707) 792-1865 FAX(707) 792-0342 <br /> Analytical ',551 Industrial Road San Carlos,CA 94070-4111 (650) 232-9600 FAX(650) 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: 2/16/99 <br /> Sacramento,CA 95827 Project Manager: Rusty Benkosky Reported: 3/2/99 <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 /> _MW-1 Q10 S902231-02 SOR <br /> Purgeable Hydrocarbons 9020200 2/18/99 2/18/99 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-Trifluorololuene 60.0-140 88.0 % <br /> MW-1 na.25 S902231-05 Soil <br /> Purgeable Hydrocarbons 9020246 2/19/99 2/19/99 1.00 ND mg/kg <br /> Benzene 0.00500 ND " <br /> Toluene 0.00500 ND " <br /> Ethylbenzene 0.00500 ND " <br /> lenes(total) 0.00500 ND <br /> thyl tert-butyl ether 0.0500 ND " <br /> Surrogate: a,a,a-Trifluorololuene 60.0-140 90.5 % <br /> MW-1 nae30 5902231-06 Soil <br /> Purgeable Hydrocarbons 9020225 2/18/99 2/18/99 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-Tris luorotoluene 60.0-140 93.0 % <br /> MW-2 010 5902231-08 Sail <br /> Purgeable Hydrocarbons 9020225 2/18/99 2118199 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 tent-butyl ether 0.0500 ND " <br /> Surrogate: a,a,a-Tris luorotoluene 60.0-140 93.5 % <br /> MW-2 (arr�20 5902231-10 Sail <br /> Purgeable Hydrocarbons 9020225 2/18/99 2/18199 1.00 ND mg/kg <br /> Benzene 0.00500 ND <br /> Toluene 0.00500 ND " <br /> Ethylbenzene 0.00500 ND <br /> lenes(total) 0.00500 ND <br /> Sequoia Analytical-Sacramento *Refer 10 end of report for text of notes and definitions. <br /> Sandra R. Hanson,Client Services Representative Page 2 of 15 <br />