Concrete pad with curb keeps spills contained. Sump allows collection and transfer to storage. Concrete pad with curb keeps spills contained. Concrete pad with some cracks keeps some spills contained. No curb or sump.
Spills soak into ground.
6-inch air gap maintained above sprayer tank. Anti-backflow device installed. Hose in tank above waterline. No anti-backflow device. Hose in tank above waterline.