Although this is not my area of expertise, I have a friend who owns a trailer park with 9 lift stations. All of the lift stations have a cord which comes from the pump out and simply plug in to a receptacle about 2 feet away from the concrete lid of the tank. The state hammered him pretty hard on this and he needs me to help him bring them up to code. Are these residential lift stations considered to be classified? I proposed he build a cynder block wall around them approx. 3 feet high and run cords from pump and floats through block wall and terminate in a W/P enclosure mounted on the exterior of the block wall. Would this be suitable?