Lefapha la Litšebeletso tsa Tikoloho la Toropo ea Tacoma le tla qala mosebetsi oa ho lokisa seretse ka har'a Thea Foss Waterway lehlabuleng lena ho sireletsa boleng ba metsi le ho boloka melemo ea nako e telele ea tlhoekiso ea nalane ea Superfund e phethetsoeng ka 2006.
Ho feta lilemo tse lekholo tsa ts'ebetso ea indasteri sebakeng sena e lebisitse ho silafatsoa ha sediments ho Thea Foss le Wheeler-Osgood Waterways. Ho arabela, Toropo ea Tacoma e ile ea etella pele boiteko ba ho hloekisa ba liranta tse limilione tse 105, bo phethiloeng ka kopanelo le mekhatlo ea mmuso le ea mmuso, beng ba thepa le mekha e meng e ikarabellang. E le karolo ea tlhoekiso, li-cubic mithara tse fetang 425,000 tsa lintho tse silafetseng li ile tsa tlosoa kapa tsa koaheloa litseleng tsa metsi.
E le karolo ea ts'ebetso e tsoelang pele ea Toropo ea Tacoma ea tsela ena ea metsi e tsosolositsoeng, libaka tse peli tsa sediment cap (tse bitsoang RA 3 le RA 8) li tla lokisoa ho sebetsana le matšoao a khoholeho. Litokiso tsena li bohlokoa ho netefatsa katleho ea nako e telele ea likatiba tse arolang litšila, ho thibela ho sisinyeha ha seretse, le ho tšehetsa tikoloho ea metsing.
Lintlha tse ling li fumaneha ho tacoma.gov/city-projects.