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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wtget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> EMCON-Sac Project Arco 548,Stockton,CA Sampled 6/23/98 <br /> 1433 N Market Blvd Project Number 21775-206 003 Received 6/24/98 <br /> Sacramento,CA 95834 Project Manager Dave Foley Reported 7111198 <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 /> MW-1 (56) S806322-00 Water <br /> Purgeable Hydrocarbons 8070033 712/98 7/2/98 500 103 ug/l I <br /> Benzene 0 500 4 58 " <br /> Toluene 0 500 0 581 " <br /> Ethylbenzene 0 500 3 17 " <br /> Xylenes(total) 0 500 146 " <br /> Methyl tert-butyl ether 500 ND " <br /> Surrogate a a a-Trifluorotoluene 600-140 93 9 % <br /> MW-2(60) S806329-01 Water <br /> Purgeable Hydrocarbons 8070033 712/98 7/2198 500 ND ug/1 <br /> Benzene 0 500 ND " <br /> Toluene 0 500 ND " <br /> Ethylbenzene 0 500 ND " <br /> X leases(total) 0 500 ND " <br /> yl tert-butyl ether 500 ND " <br /> rogate a a,a-Trtfluorotoluene 600-140 984 % <br /> MWMW-3(6211621 S$05329-02 Water <br /> Purgeable Hydrocarbons 8070056 7/6/98 7/6/98 500 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 /> Methyl tert-butyl ether Soo ND " <br /> Surrogate a a a-Triuorotoluene 600-140 977 % <br /> 5806329-03 Water <br /> Purgeable Hydrocarbons 8070056 7/6/98 7/6/98 500 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 tent-butyl ether 500 ND " <br /> Surrogate a a a-Triuorotoluene 600-140 102 % <br /> MW-5160) 5806329-04 Water <br /> Purgeable Hydrocarbons 8070056 7/6/98 716/98 500 702 ug/l l <br /> Benzene 0 500 _ 504 " <br /> Toluene 0 500 791 " <br /> Ethylbenzene 0 500 333 " <br /> X leges(total) 0 500 366 " <br /> ota Analytical-Sacramento g *Refer to end of report for text of notes and definitions <br /> l' ! <br /> Ronald W Bobel,Client Services Representative Page 2 of 6 <br />