OSHA/lack of info
I did a quick Google on this:http://www.skiwax.ca/tp/waxroom1php
The key here as the author points out is that it is difficult to obtain objective information on the PEL (permissible exposure limit), for the individual components of wax and fluro compounds. IN THEORY, your employer (the ski shop), is supposed to have the MSDS data posted and comply with the PEL's via monitoring of the employees via a "TWA" or time weighted average over an 8 hour work shift. In REALITY ..... OSHA is not going to be placing much emphasis on small arcane businesses such as ski shops.
When you look at the "industry" at large there are many factors that can induce "mortality or morbidity". If I was a young grad student I would love to spend the time or get a grant to study the effects of the potential for disease spread via snow guns. Look at the source of the water in the collecting pond with a resident population of geese and septic runoff .... then we suck it up and spray it in the air and the instructors have to teach and breathe the stuff for hours ... lots of sinus infections early in the year ..... too many issues ... too little time. One day I looked at the color of the ice on the guns (green/brown) .... and looked back at the pond/swamp ...... keeeeeerist ...... yuck ....