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4 from MW-3 also Indicates this is a degraded hydrocarbon "urce. wrica this plume does not artso on 396 East Eleventh, a sdparate lnvestigation is warranted by the respormble party at that locst#on Conclusrons ertd ROCOMIMnd"ants The date collected in this and previous mvesUgations 3WQ Mat the plume has migrated north about 300-feet The plume has slightly Impinged Upon Tracy I fgh 3ChaM property along the capillary fringe, however, clLsoolved components were not observed in d radlent Well ARIA!-4 The predominant partlCn of the contaminanft are TPHG and the BTZ-X cornppn Prrt rs very Degraded Wien Compared to a 'fresh'fuel Hydrocarbon concentmtlons std antic;pated to conilnue to 4=reese with time since the tents source and sorrro contammated soil have been removed 7-ila oproading terns to retard movement, and display concen;rations 11WO Shorts with rioAng and r`ailing wo or lever. Since the plume hu Spread On the capillary t'rtrga ants Is depleted in volatile components, 'active" site cleanup using groundwater purnping or loll vapor extraction aragmrn Is not cons:demd ccst effective to ruMove these contaminants Wright recommends that the grour;dwater rnentforing luefis W mondared at quarterly intervals to meet the requiremanta of the !DHS-END for undergmurd tank pwicioum MIOO- s TPHG vafues and Benzeno are In an overall declining trend, with wme fiuctu-Ztions Ot `AVV-9 if curicuntratlons continue to remain conotant or dodino over the next throe quartoru, v Viligft+nils u zjtj cic3rtrs A 3apartnte :lura has ben atscriod movirg r;