I see that you don’t like the width of the rock layer in a mound to be more than 10 feet. What’s the reason for that? I see lots of beds that are a lot wider than 10 feet. Why can’t a rock layer in a mound be more than 10 feet, when beds are a lot wider than that?Let me first explain how a sewage treatment mound works. The purpose of the mound is to provide treatment for sewage tank effluent where there is shallow soil depth over a restricting layer. The topsoil layer may be only a couple
