Fire Suppression and Portable Extinguishers Inspection Monthly Pro-Inert and CO2 Cylinder Gauge Check. Put in Building Reports. PO: C5686 Confirm with site. Must be scheduled ahead of time for cyber security protocol. Monthly safety inspection including Portable Fire Extinguishers, Emergency/Exit Lighting, Ladders, Eyewash Stations, and Pro-Inert/CO2 Cylinder Gauge Check. PO: C5686 BRC ID: 419366