Just back from quoting a mid-sized medical facility. Lots of problems with their current service provider: grubby ceramic floors, film on the tile, built up dust, etc. Being interested in the film on the tile, I took a quick look in the janitor closet. I found grubby dust mops and a string wet mop, household chemicals, bleach, and no MSDS sheets.
The lack of an MSDS book is the most blatant issue; neither OSHA nor the State health regulators (we do janitorial service in Phoenix AZ) would be happy. Besides the safety risk to the janitorial crew, there is risk to both staff and patients, given that the closet was not just unlocked but wide open, with the light left (invitingly) on.
The film on the tile, and the build-up on the ceramic, might have been dirt left behind by the dust-mop (vacuuming hard surface floors removes a lot more small particles), from the string mop (a microfiber mop scrubs better and removes more solution and particles), or from the fairly alkaline cleaner in the closet, presumably used on the floors (damp mopping nightly, in a fairly clean medical environment, ought be perfectly feasible with a neutral cleaner; a strongly alkaline product needs to be rinsed after use - a step most folks skip).
The dust - most everywhere - would be better controlled by microfiber-wiping surfaces (get rid of the feather duster) and by vacuuming hard floors with a HEPA filtered vac (get rid of the dust mop - I haven't owned one in years).
Always fun, poking around in the other guy's janitor closet.
A bit about us:
My firm, CBN Building Maintenance, provides commercial cleaning services in Phoenix AZ and the wider metro area. We've been in business since 1974; hold the BBB's A-plus rating; and have long been in the forefront of the industry in environmentally sensitive cleaning for health, safety and security. Our program can generally improve Indoor Air Quality, in the size range of most allergens, by a factor of 50%, as reflected in our ongoing IAQ sampling.