Many years ago when managing the fert & pest division of a large tree care company one of our trucks was on a golf course and rolled on it's side, spilling 1,000 gals into a stream. Luckily the applicators weren't hurt and had followed my instructions not to add pesticides to the tank until they were ready to spray. Dodged a big one there.
Since then, I've favored spray rigs that carried only water in a mother tank and have a 25 gal tank to mix individual batches in.
The nation that destroys its soil destroys itself.
Franklin D. Roosevelt