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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 (510) 988.9660 FAX(510)988-9673 <br /> Analytical .8I9 Striker Avenue, Suite 8 Sacramento,CA 95834 (916) 921.9600 FAX(916)92 1-0 100 <br /> i <br /> EMCON-Sac Project: Arco 2186,Stockton,CA Sampled: 6/24/98 <br /> 1433 N. Market Blvd. Project Number: 21775-237-002 Received: 6/24/98 <br /> Sacramento,CA 95834 Project Manager: Dave Foley Reported: 7/16198 <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 /> MY-1-(38) 5806338-00 Water <br /> Purgeable Hydrocarbons 8070086 7/7/98 717/98 250 505 ug/l <br /> Benzene 2.50 27.5 " <br /> Toluene 2.50 NO " <br /> Ethylbenzene 2.50 6.02 " <br /> Xylenes(total) 2.50 9.73 " <br /> Methyl tert-butyl ether " " 25.0 NO <br /> Surrogate: a,a,a-Trifluorotoluene 60.0-140 78.2 <br /> MW-2 (38) S806338-01 Water <br /> Purgeable Hydrocarbons 8070058 7/7198 717198 50.0 NO ug/1 <br /> Benzene 0.500 ND " <br /> Toluene 0.500 NO " <br /> Ethylbenzene 0.500 ND " <br /> Abienes(total) 0.500 ND " <br /> hyl tert-butyl ether 5.00 NO " <br /> urrogate: a,a,a-Triuorotoluene 60.0-140 98,1 <br /> MW-3(37) 5806338-02 Water <br /> Purgeable Hydrocarbons 8070058 7/7198 7/7/98 50.0 ND ug/1 <br /> Benzene 0.500 NO " <br /> Toluene 0.500 NO " <br /> Ethylbenzene 0.500 NO " <br /> Xylenes(total) 0.500 ND " <br /> Methyl tert-butyl ether 5.00 NO " <br /> Surrogate: a,a,a-Trifluorotoluene 60.0-140 85.6 <br /> MW-4 (38) S806338-03 Water <br /> Purgeable Hydrocarbons 8070058 7/7198 7/7198 50.0 NO ug/1 <br /> Benzene 0.500 ND " <br /> Toluene 0.500 ND " <br /> Ethylbenzene 0.500 NO " <br /> Xylenes(total) 0.500 ND " <br /> Methyl tert-butyl ether 5.00 16.2 " <br /> Surrogate: a,a,a-Trifluorotoluene 60.0-140 88.2 <br /> VW-3 (38) SSQ63-38-o4 Water <br /> Purgeable Hydrocarbons 8070086 7/7/98 7/7/98 50.0 NO ug/I <br /> Benzene 0.500 ND " <br /> Toluene 0.500 NO " <br /> Ethylbenzene 0.500 ND " <br /> enes(total) 0.500 ND " <br /> equoia Analytical-Sacramento *Refer to end of report far text of notes and definitions. <br /> J41t <br /> Ronald W Bobel,Client Services Representative Page 2 of 9 <br /> R9, <br />