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680 Chesapeake Drive Redwood Gty CA 94063 (650)364 9600 FAX(650)364-9233 <br /> a 404 N Wiget lane Walnut Creek CA 94598 {925)988-9600 FAX(925)988-9673 <br /> Sequoi <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 /> 1551 Industrial Road San Carlos CA 94070-41 11 (650)232 9600 FAX(650)Z32-9612 <br /> SECOR International Project ARCO 2093,Tracy,CA Sampled 5/14/99 <br /> 9912 Business Park Drive,Ste 100 Project Number 7G600-604-02 Received 5/14/99 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 5/28/99 <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 /> ATR-5(continued) S9052Q5-05 <br /> Water <br /> Xylenes(total) 9050267 5/21/99 5/21/99 0 500 ND ug/l <br /> Methyl tert-butyl ether 5 00 ND " <br /> Surrogate a a a-Trifluorotoluene 600-140 810 % <br /> AIR-8 S905205-06 W t? <br /> purgeable Hydrocarbons 9050267 5/21/99 5/21/99 500 155 ug/l l <br /> Benzene 0 500 179 " <br /> Toluene 0S00 NU " <br /> Ethylbenzene 0 500 241 " <br /> Xylenes(total) 0 500 200 <br /> Methyl tert-butyl ether 5 00 ND <br /> Surrogate a a a-TriJluorotoluene 600-140 828 % <br /> 0 <br />�a Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> �r17 Z rjf <br /> Sandra R Hanson,Client Services Representative ,¢ Page 3 of <br />