I might note that the as I read the "eye wash" rules, it is not so much a distance from the -charger-, as it is distance (or must be able to be reached within time frame) from the "battery service area", which most but not all the time is the same physical area as where the charger is located.
I might also add that, in the USA, the distance/time frame to reach the eyewash station vary state to state. it is one area the states that have their own OSHA seem to feel safe with making a distance change to a shorter distance/time frame, but this gets a long way from the original question, so please forgive an old man's mind wondering.