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4IN <br /> Sequoia 819 Striker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> (916) 921-9600 <br /> Analytical FAX(916) 921-010 <br /> EMCON/IT-Sacramento Project ARCO 548,Stockton, CA Sampled 12/13/99 <br /> 1433 N Market Blvd,##1 Project Number 792202 Received 12/14/99 <br /> Sacramento,CA 95834 Project Manager Dave Foley Reported 12/21/99 <br /> Total Purgeable Hydrocarbons (C6-C12),BTEX and MTBE by DHS LUTT <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Limits Limit Result Units Notes* <br /> MW-I(55) 5912165-01 Water <br /> Purgeable Hydrocarbons 9120216 12/17/99 12/17/99 500 ND ug/l <br /> Benzene " „ 0 500 ND it <br /> Toluene to " " 0 500 ND " <br /> Ethylbenzene 0 500 ND " <br /> Xylenes(total) 0 500 ND " <br /> _Methyl tert-butyl ether 2 50 5 88 __ <br /> Surrogate a,a,a-Tr�uorotoluene 60 0-140 93 5 <br /> MW-2(60) 5912165-02 Water <br /> Purgeable Hydrocarbons 9120216 12/17/99 12/17/99 500 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 /> jiftyl tert-_butyl ether_ 250 348 <br /> gate Ta a,a,Trtfluorotoluene of to 11 600-140 951 YO <br /> MW-3(62) S912I65-03 Water <br /> Purgeable Hydrocarbons 9120216 12/17/99 12/17/99 500 ND ug/l <br /> Benzene " 11 0 500 ND " <br /> Toluene to " 0 500 ND " <br /> Ethylbenzene 0 500 ND " <br /> Xylenes(total) _ 0 500 ND " <br /> Methyl tert-butyl ether " 250 ND <br /> Surrogate a,a,a-Trifluorotoluene 600-140 923 <br /> MW-4(62) S912I65-04 Water <br /> Purgeable Hydrocarbons 9120216 12/17/99 12/17/99 50 0 ND ug/l <br /> Benzene 11 01 0 500 ND " <br /> Toluene to " " 0 500 ND " <br /> Ethylbenzene " 0 500 ND " <br /> Xylenes(total) 0 500 ND " <br /> Methyl tert-butyl ether " to 250 ND " <br /> Surrogate a,a,a-Triuorotoluene 600-140 903 YO <br /> MW-5(60) S912I65-05 Water <br /> Purgeable Hydrocarbons 9120216 12/17/99 12/17/99 500 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 /> is Analytical-Sacramento *Refer to end of report for text ofnotes and definitions <br /> Page 2 of 5 <br />