Mu 1994, vashanu vasingazivikanwe vagari vekontrakta uye chirikadzi dzevashandi vekontrakta Walter Kasza naRobert Frost vakamhan'arira USAF neUnited States Environmental Protection Agency. Mhosva yavo, iyo yavakamiririrwa naGeorge Washington University mutemo purofesa Jonathan Turley, vakapomera kuti vaivepo apo huwandu hwakawanda hwemakemikari asingazivikanwe hwakange hwapiswa mumakomba akavhurika nemakomba paGroom. Biopsies dzakatorwa kubva kune vanonyunyuta dzakaongororwa neRutgers University biochemists, vakawana huwandu hwe dioxin, dibenzofuran, uye trichloroethylene mumafuta emuviri wavo. Vanyunyuti vakati vakange vatambura, chiropa, uye kukuvara kwekufema nekuda kwebasa ravo paGroom, uye izvi zvakakonzera kufa kwaKasza naFrost.
kuti USAF yakanga yabata zvisiri pamutemo zvinhu zvine chepfu, uye kuti EPA yakanga yatadza kuita basa rayo rokumanikidzira Mutemo Wokuchengetedza Nokudzorera Zvinhu (unodzora kubatwa kwezvinhu zvine ngozi)