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680 Chesapeake Drive Redwood City,CA 94063 (650)364-9600 FAX(650)3649233 <br /> Sequoia 404 N.Wiget Lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue,Sulte 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 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> • <br /> SECOR International Project: ARCO 4493,Stockton,CA Sampled: 2/24199 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 Note ] <br /> s* <br /> SP2.A.S.C.D(composite) 5903005-29 5911 <br /> Purgeable Hydrocarbons 9030049 3/2/99 312/99 20.0 203 mg/kg 2,D <br /> Benzene 0.100 0.353 D <br /> Toluene 0.100 0.603 D <br /> Ethylbenzene 0.100 3.53 D <br /> Xylenes(total) 0.100 16.2 D <br /> Methyl tent-butyl ether 1.00 ND D <br /> Surrogate: a,a,a-Tris luorotoluene 60.0-140 94.0 <br /> V E i-2 S9039Q5-30 SQU <br /> Purgeable Hydrocarbons 9030049 3/2199 3/2/99 1.00 ND mg/kg <br /> Benzene 0.00500 ND " <br /> Toluene 0.00500 ND " <br /> Ethylbenzene 0.00500 NDAbl <br /> " <br /> enes(total) 0.00500 ND " <br /> yl tert-butyl ether 0.0500 ND _ <br /> urrogate: a,a,a-Trifluorotoluene 60.0-140 91.0 <br /> VE2-1.5 S903005-31 SAW <br /> Purgeable Hydrocarbons 9030049 312/99 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 90.0 <br /> V E3-1,5 5903005-32 S9i1 <br /> Purgeable Hydrocarbons 9030049 3/2/99 312/99 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-Trijlluorotoluene 60.0-140 98.0 % <br /> SlEcluota Analytical-Sacramento *Refer to end of report for text of notes and definitions. <br /> niG �C <br /> Page$ of 21 <br /> Sandra R.Hanson,Client Services Representative <br />