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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364 9233 <br /> Sequoia 404 N Wiget Lane Walnut Geek 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 Cartos CA 94070 41 1 1 (650)232 9600 FAX(650►232 9612 <br /> • <br /> :.COR international Project ARCO 2093 Tracy CA Sampled 4115/99 <br /> 9912 Business Park Drive,Ste 100 Project Number N/A Received 4116/99 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosk Re rted 4130/99 <br /> Total Purgeable Hydrocarbons(C&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 /> InflupU S204227-0 Air <br /> Purgeable Hydrocarbons 9040187 4116/99 4116/99 100 163 mg/m'Air 1 <br /> Benzene 00500 0 606 <br /> Toluene 00500 1 89 " <br /> Ethylbenzene 00500 0 572 <br /> Xylenes(total) 00500 13 7 " <br /> Me".,,d tert-butyl ether 0 500 ND " <br /> Surrogate a a a-Trifluorotoluene 600-140 130 % <br /> Eflluen 5204227-02 gLE <br /> Purgeable Hydrocarbons 9040187 4/16/99 4/16/99 100 189 mg/m'Air 2 <br /> Benzene 00500 ND <br /> Toluene 00500 0 147 <br /> Ethylbenzene 00500 00798 <br /> X lenes(total) 00500 1 59 " <br /> yl tert-butyl ether 0 500 ND <br /> ogate a a a-Trifluorotoluene 600-140 96 0 % <br /> AM <br /> Analytical -Sacramento - -- 'Refer to end of report for text of notes and definitions <br /> Sandra R Hanson,Client Services Representative Page 2 of 6 <br />