Do you think people who mow lawns all day keep running to the gas station to fill all of their equipment? Hell no, they got 20+gallon tanks of extra gas that they drag along with their equipment. I can't see how this is any different, and good luck enforcing anything in this regard without getting every landscaper from here to China pissed off. Anyway, we allow tanker trucks full of corrosive chemicals drive down any "main" street and they are so dangerous that if one of them tipped over and spilled they'd kill anyone downwind. Gasoline is not nearly as dangerous, as it is not especially good at explosive burning -- it only becomes so when it is aerosolized and hit with an electrical charge in a confined space. This is just not as dangerous as people think -- Semis have 100-gallon tanks of diesel and no one complains, most cars are 20 gallons, etc... "Explosive" gas tanks everywhere! It's not going to be any more dangerous, especially if the hauling vehicles take safety precautions that we use with other vehicles. (Plastic containers to prevent sparks if they are impacted, cages, etc...)
Mostly, much adieu about nothing..