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Sequoia 6RO 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 /> 1455 cDowell Blvd <br /> Analytical 1551 Induusttrial Road North Ste D Petaluma CA 940;0-41 11 (650)232-1865 FAX(707)792-034Z <br /> 9600 FAX(650)232-9612 <br /> SECOR Intonational Project ARCO 2093,Tracy,CA Sampled 3117/99 <br /> 9912 Business Park Drive,Ste too Project Number 7G600-604-01 Received 3/18/99 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 4/1/99 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical-Sacratnento <br /> Batch Date Date Surrogate Reporting <br /> [A,alyte Number Prepared Analyzed Limits Limit Result Units Notes* <br /> ATR-3(con uLugdd) S903261-10 <br /> Water <br /> Benzene 9030329 3/25199 3/25/99 0 500 141 ug/l <br /> Toluene 0 500 ND <br /> Ethylbenzene 0 500 ll 7 <br /> Xylenes(total) 0 500 1 29 <br /> Methyl tert-butyl ether 5 00 16 4 " <br /> Surrogate a a a-Trifluorotoluene " 60 0-140 981 <br /> ATR-5 5903261-11 Water <br /> Purgeable Hydrocarbons 9030327 3/24/99 3/24/99 500 756 ug/i I <br /> Benzene 0 500 0 586 " <br /> Toluene 0 500 ND <br /> Ethylbenzene 0 500 0 876 <br /> Xylenes(total) 0 500 1 02 " <br /> ethyl tert-butyl ether Soo ND <br /> rogate a a a-Trrfluorotoluene 600-140 85 7 <br /> AIR-8 5903261-12 Water <br /> Purgeable Hydrocarbons 9030340 3/26/99 3/25/99 500 130 ug/l t <br /> Benzene 0 500 212 " <br /> Toluene 0 500 0 528 " <br /> Ethylbenzene 0 500 2 12 " <br /> Xylenes(total) 0 500 271 " <br /> Methyl Cert-butyl ether 500 ND " <br /> Surrogate a a a-Triuorotoluene 600-140 1o5 <br /> quoia Analytical -Sacramento 11 *Refer to end of report for text of notes and definitions <br /> 3)�l/-/A/A Iq///0?—)' <br /> Sandra R anson,Client Services Representative Page 4 of 9 <br />