In the event of a biological incident in a transportation hub such as a subway system, effective remediation of railcars, subway tunnels and stations will require the use of various decontamination approaches. The study described in this report builds on previous fogging decontamination research, but with a focus on decontaminating subway railcars and related materials.
https://cfpub.epa.gov/si/si_public_file_download.cfm?p_download_id=529701