we provide beach umbrellas for the guys that work outdoors. coolers and ice for all the tech's. fortunately we are heat acclimated and 95 isn't too serious. when it gets over 100 things slow down a little and if a customer complains about the additional time get him to come to your work area to "look at this" and keep him talking till he gets too **** hot to gripe anymore

as for the chemical exposure.....the reality is...... that "reg" requires that information be "made available" not that it be supplied without request so in most cases the employee will be referred to the msds when he/she asks a question and left to his/her comprehension of the data. reactions between chemicals present at the customers location and chemicals introduced by the repair person are even more difficult to prevent or prepare for because the employer is responsible for the msds and hazards of the chemicals he/she is using. how many of us / you have read the msds for brake cleaner or carb cleaner? they contain some mean stuff that can be very reactive. some of the chlorinated stuff when sprayed into the carb and burned can be turned into phosgene which has been used as a chemical warfare agent. i believe this is a very serious issue with permanent and cumulative repercussions. there are way too many lung and skin problems associated with this industry and some of these problems are a bit too close to home for me.
the only thing you can do at this point is demand to see the msds and ask questions when you have doubts. nobody is as responsible for your safety as you are.