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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 /> Analytical 1455 McDowell Blvd.North,Ste.D Petaluma.CA 94954 (707)792-1865 FAX(707)79Z-0342 <br /> SECOR International Project: ARCO 4493,Stockton,CA Sampled: 2/16199 <br /> 9912 Business Park Drive, Ste. 100 Project Number: N/A Received: 2117/99 <br /> Sacramento,CA 95827 Project Manager: Rusty Benkosky Reported: 3/3/99 <br /> Total Purgeable Hydrocarbons(C6-C12)and BTEX by DHS LUFT <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Limits Limit Result Units Notes* <br /> M A 5902252-01 Water <br /> Purgeable Hydrocarbons 9020261 2/22199 2/22/99 50.0 231 ug/l i <br /> Benzene 0.500 1.35 " <br /> Toluene 0.500 ND " <br /> Ethylbenzene 0.500 2.37 " <br /> Xylenes(total) 0.500 ND " <br /> Surrogate: a,a,a-Trfluorotoluene 60.0-140 NR % 2 <br /> MW-2MW-2 S902252-02 Water <br /> Purgeable Hydrocarbons 9020261 2/22/99 2/22/99 50.0 ND u8/1 <br /> Benzene 0.500 ND " <br /> Toluene 0.500 ND " <br /> Ethylbenzene 0.500 ND " <br /> Xylenes(total) 0.500 ND " <br /> 0ogale: a,a,a-Trifluorotoluene 60.0-140 NR % 3 <br /> MW-3MW-3 S902252-03 Water <br /> Purgeable Hydrocarbons 9020261 2122/99 2/22/99 50.0 ND ug/1 <br /> Benzene 0.500 ND " <br /> Toluene 0.500 ND " <br /> Ethylbenzene 0.500 ND " <br /> Xylenes(total) 0.500 ND " <br /> Surrogate: a,a,a-Trifluorotoluene 60.0-140 98.4 % <br /> MWA S902252-04 Wate= <br /> Purgeable Hydrocarbons 9020261 2/22/99 2/22/99 1000 15000 ug/l 4,D <br /> Benzene 10.0 503 D <br /> Toluene 10.0 ND D <br /> Ethylbenzene 10.0 707 D <br /> Xylenes(total) 10.0 1550 D <br /> Surrogate: a,a,a-Trfluorololuene 60.0-140 93.7 % <br /> Sequoia Analytical -Sacramento *Refer to end of report for text of notes and definitions. <br /> Sarldra R. Hanson,Client Services Representative Page 2 of 20 <br /> t� <br />