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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 1555 IndDow�el11R8oavd North Ste D San iuma CarlosCA 94954 (707)CA 94070 41 1 1 (650)232-9600 FAX(65)2.32-96865 FAX(707) 42 <br /> SECOR International Project ARCO 2133, Stockton,CA Sampled 3/15/99 <br /> 9912 Business Park Drive, Ste 100 Project Number 7G600-079-04 Received 3/16/99 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 4/1/99 <br /> Total Purgeable Hydrocarbons(C6-02), 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 /> D-1-3' S903219-01 sad <br /> Purgeable Hydrocarbons 9030287 3/22/99 3/22/99 l 00 403 mg/kg l <br /> Benzene 000500 00262 " <br /> Toluene 000500 00237 " <br /> Ethylbenzene 000500 000968 " <br /> Xylenes(total) 000500 00497 " <br /> Surrogate a a a-Trefluorotoluene 600-140 114 % <br /> Methyl tert-butyl ether 250 21 4 mg/kg D <br /> Surrogate a a a-Trifluorotoluene " 600-140 970 % <br /> D-2-2.5' 5903219-02 5411 <br /> Purgeable Hydrocarbons 9030287 3/22/99 3122/99 1 00 4 87 mg/kg l <br /> Benzene 000500 00153 " <br /> Toluene 000500 00191 <br /> 0(benzene 000500 00250 <br /> nes(total) 000500 0 301 " <br /> Surrogate a a a-Trefluorotoluene 600-140 100 % <br /> Methyl tent-butyl ether 2 50 25 6 mg/kg D <br /> Surrogate a a a-Trefluorotoluene 600-140 970 % <br /> D-3-3' S903219-03 SAW <br /> Purgeable Hydrocarbons 9030287 3/22/99 3/22/99 1 00 ND mg/kg <br /> Benzene 000500 ND " <br /> Toluene 000500 ND " <br /> Ethylbenzene 000500 ND " <br /> Xylenes(total) 000500 ND " <br /> Methyl tert-butyl ether 00500 ND " <br /> Surrogate a a a-Trefluorotoluene 600-140 985 % <br /> D-4-2.5' S903219-04 � <br /> Purgeable Hydrocarbons 9030287 3/22/99 3/22/99 l 00 ND mg/kg <br /> Benzene 000500 ND " <br /> Toluene 000500 ND " <br /> Ethylbenzene 000500 ND " <br /> Xylenes(total) 000500 ND " <br /> Methyl tert-butyl ether 00500 ND " <br /> Surrogate a a a-Trffluorotoluene " 600-140 965 % <br /> D-5-2.5' 5903212-05 SAW <br /> Purgeable Hydrocarbons 9030287 3/22/99 3/22/99 100 102 mg/kg 2 D <br /> Benzene 00500 ND D <br /> enc <br /> 00500 0 172 D <br /> Sequoia Analytical- Sacramento T^ *Refer to end of report for text of notes and def nmons <br /> Sandra R Hanson,Client Services Representative Page 3 of 22 <br />