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680 Chesapeake Drive Redwood City CA 94063 (650)364 9600 FAX(650)364-9233 <br /> a 404 N Wlget Lane Walnut Creek CA 94598 (925)988-%W FAX(9Z5)988-%73 <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)792-0342 <br /> t 551 Industrial Road San Carlos CA 94070-4111 (650)23Z 9600 FAX(650)232-9612 <br /> SECOR International Project ARCO 2093,'Tracy,CA Sampled 5114199 <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-2 1S%2Q52_Q5-Ql Water <br /> Purgeable Hydrocarbons 9050267 5/21/99 5/21/99 500 ND ugll <br /> Benzene 0 500 ND " <br /> Toluene 0 500 ND " <br /> Ethylbenzene 0 500 ND <br /> Xylenes(total) 0 500 ND " <br /> Methyl tert-butyl ether 500 ND " <br /> Surrogate a a a-Trifluorololuene 11600-140 84 4 % <br /> ATR-7 5905205-02 Water <br /> Purgeable Hydrocarbons 9050267 5/21/99 5/21/99 500 ND ug/l <br /> Benzene 0 500 ND <br /> Toluene 0 500 ND <br /> Ethylbenzene 0 500 ND " <br /> Xylenes(total) 0 500 ND " <br /> NA1101111il tert-butyl ether Soo ND <br /> gale a a a-Tnfluorotoluene - 600-140 T 824 <br /> ATRA S905205-03 Water <br /> Purgeable Hydrocarbons 9050267 5/21/99 5121/99 Soo ND ug/l <br /> Benzene 0 500 0 591 " <br /> Toluene 0 500 ND " <br /> Ethylbenzene 0 500 ND " <br /> Xylenes(total) 0 500 ND <br /> Surrogate a a a-Trifluorotoluene " 600-140 791 % <br /> Methyl tent-butyl ether 500 8720 ug/l D <br /> Surrogate a a a-Trtfluorotoluene 600-140 76 8 % <br /> ATR-12 S905205-04 Water <br /> Purgeable Hydrocarbons 9050267 5/21/99 5/21/99 500 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 /> Methyl tert-butyl ether 500 ND " <br /> Surrogate a a a-Trifluorotoluene 600-140 78 1 % <br /> ATR-5 5905205-0 Water <br /> Purgeable Hydrocarbons 9050267 5/21/99 5/21/99 500 ND ug/l <br /> Benzene 0 500 ND " <br /> Toluene 0 500 ND " <br /> Ethylbenzene 0 500 ND " <br /> S a Analytical-Sacramento *Refer to end of report for text of notes and def nations <br /> Sandra R Hanson,Client Services Representative Page 2 of 5 <br />