Site of Intentional Expulsion : (Hcf-Gas) All points within 1 ft (0. 3 m) of a point at which an oxygen-enriched atmosphere is intentionally vented to the atmosphere
NFPA 99 Standard for Health Care Facilities, 2002 ed. https://law.resource.org/pub/us/cfr/ibr/004/nfpa.9 9.2005.pdf, (Std: Hlth Care Fcilty - Amer) {242 NFC}