I don't think I would be using any impact wrench if the flammable vapors are at ignition point or higher.
Bad weather, I could have the lug nuts off before the air line is out and hooked up.
Granted there are other pneumatic tools that could be used, most have a battery powered brother at this point.
I was just curious at to why select pneumatic.
As far as airing up the tires (or airing up anything for that matter), that's a no brainer - compressed air, CO2, etc is significantly faster.
Not all pneumatics are certified for use around flammable vapors they are called “cold tools” in general this is one of the reasons pneumatic tools were favored in repair shops and service stations.
I had a chance in the (olden-days) to work for a retired fire capt. that owned a service station lof’s , propane, tire repair, new tires, battery service, new batteries the full gamut everything. fire safety was obviously an issue and I learned a lot, of what and what not to do, Co2 is going to be a fire suppressant, regular air, not so much.
You sound like you have great wrenching skills .. yeah no brainer.