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is <br /> Sequoia 819 Striker Avenue, Suite 8 <br /> Sacramento, CA 95834 <br /> (916)921-96 <br /> Analytical FAX(916) 92.1 0100 <br /> EMCON-Sac Project: ARCO 2186,Stockton, CA Sampled: 6/11/99 <br /> 1433 N. Market Blvd. Project Number: 21775-237-002 Received: 6/11/99 <br /> Sacramento,CA 95834 Project Manager: Dave Foley Reported: 6/28/99 <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 /> (74) <br /> MW-1 S906224-01 Water <br /> Purgeable Hydrocarbons 9060342 6/23199 6/23/99 500 7310 ug/l 1,D <br /> Benzene 5.00 397 D <br /> Toluene 5.00 162 D <br /> Ethylbenzene 5.00 543 D <br /> Xylenes(total) 5.00 1500 D <br /> Methyl tert-butyl ether 50.0 ND D <br /> Surrogate: a,a,a-Trifluorotoluene " 60.0-140 82.5 % <br /> (74)MW-2 S906224-02 Water <br /> Purgeable Hydrocarbons 9060342 6/23/99 6/23/99 50.0 ND ug/l <br /> Benzene 0.500 ND " <br /> Toluene 0.500 ND " <br /> Ethylbenzene 0.500 ND " <br /> es(total) 0.500 0.796 <br /> I tert-butyl ether 5.00 ND " <br /> Surrogate: a,a,a-Trifluorotoluene 60.0-140 86.1 % <br /> (73) MW-3 5906224-03 Water <br /> Purgeable Hydrocarbons 9060342 6/23/99 6/23/99 50.0 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 5.00 ND " <br /> Surrogate: a,a,a-Triuorotoluene 60.0-140 83.7 % <br /> (64)MW-4 S906224-04 Wate <br /> Purgeable Hydrocarbons 9060342 6/23/99 6/23/99 50.0 194 ug/I 2 <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 5.00 41.0 " <br /> Surrogate: a,a,a-Trifluorotoluene 60.0-140 107 % <br /> (60)VW-3 5906224-05 Water <br /> Purgeable Hydrocarbons 9060342 6/23/99 6/23/99 50.0 152' ug/1 3 <br /> Benzene 0.500 1.90 " <br /> Toluene 0.500 ND " <br /> Ethylbenzene " " " 0.500 6.99 <br /> 4 s(total) " 0-500 16.2 " <br /> Sequoia Analytical-Sacramento — *Refer to end of report for text of notes and definitions. <br /> Page 2 of 8 <br />