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Sequoia 819 Avenue Suite 8 <br /> 4(D Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical <br /> FAX (916)921-0 100 <br /> EMCON-Sac Project ARCO 2130,Stockton,CA Sampled 6/4199 to 6/6/99 <br /> 1433 N Market Blvd Project Number 21775-229 004 Received 6/7199 <br /> Sacramento,CA 95834 Project Manager Dave Foley Reported 6/27199 <br /> Total Purgeable Hydrocarbons(C6-02),BTEX and MFBE 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 (72'115906114-01 Watcr <br /> Purgeable Hydrocarbons 9060183 6/18/99 6118/99 Soo 168 ug/l 1 <br /> Benzene 0 500 263 <br /> Toluene 0 500 ND " <br /> Ethylbenzene 0 500 ND " <br /> Xylenes(total) 0 500 ND " <br /> Methyl tert-butyl ether 500 109 " <br /> Surrogate a a,a-Trifluorotoluene 600-140 879 % <br /> MW-2(72'1 S906114-02 Water <br /> Purgeable Hydrocarbons 9060224 6/18/99 6/18/99 500 184 ug/l 2 <br /> Benzene 0 500 119 " <br /> Toluene 0 500 ND " <br /> Ethylbenzene 0 500 103 <br /> enes(total) 0 500 0 669Aw <br /> " <br /> hyl tert-butyl ether 500 126 " <br /> urrogate a a a-Trrfluorotoluene 600-140 475 % 3 <br /> MW-3(73'1 5906114-03 waft <br /> Purgeable Hydrocarbons 9060182 6117/99 6/17/99 500 102 ug/l 2 <br /> Benzene 0 500 0 569 " <br /> Toluene 0 500 ND " <br /> Ethylbenzene 0 500 4 45 " <br /> Xylenes(total) 0 500 0 885 " <br /> Methyl tent-butyl ether 500 ND " <br /> Surrogate a,a a-Trifluorotoluene 600-140 960 % <br /> M3Y-4(73') 5906114-04 Water <br /> Purgeable Hydrocarbons 9060182 6/17/99 6/17199 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 5 00 ND " <br /> Surrogate a a,a-Trrfluorotoluene 600-140 935 % <br /> MW-5(75'1 5906114-05 Water <br /> Purgeable Hydrocarbons 9060182 6/17/99 6/17/99 500 ND ug/l <br /> Benzene 0 500 503 " <br /> Toluene 0 500 0 721 " <br /> Ethylbenzene 0 500 ND " <br /> Yglenes(total) 0 500 1 60 " <br /> quota Analytical-Sacramento "Refer to end of report for text ofnotes and definitions <br /> Page 2 of 11 <br />