We were insane. Every machine room was swept daily, floors stripped and waxed 1x/week (in the machine room!!), readings and wipe down of the machines was done 4x/day, so you could see if there were any leaks etc. Spares were labels and neatly hung. Each machine room had a spare TOWER and spare compressor in line - just open valves, and turn on. Building also ran at 100% fresh air, all electrostatically precipitated. Yes, the building was a virtual clean room. Did I say we were a BIT crazy?