Mu 1994, vashanu vasingazivikanwe vagari vekontrakta uye chirikadzi dzevashandi vekontrakta Walter Kasza naRobert Frost vakamhan'arira USAF neUnited States Environmental Protection Agency. Mhosva yavo, yavakamiririrwa naGeorge Washington University mutemo purofesa Jonathan Turley, vakapomera kuti vaivepo apo huwandu hukuru hwemakemikari asingazivikanwe hwakapiswa mumakomba akavhurika nemakomba kuGroom. Biopsies dzakatorwa kubva kune vanonyunyuta dzakaongororwa neRutgers University biochemists, vakawana huwandu hwe dioxin, dibenzofuran, uye trichloroethylene mumafuta emuviri wavo. Vanyunyuti vakapomera kuti vakatambura ganda, chiropa, uye kukuvara kwekufema nekuda kwebasa ravo kuGroom, uye kuti izvi zvakakonzera kufa kwaWalter Kasza naFrost.
Purofesa wezvemitemo weGeorge Washington University Jonathan Turley