I don't agree with the minimum install depth of 8 inches. We have designed many shallow pads less than 8" in the coastal plain and they are working properly. Where did this limit on the install depth come from? Has there been a history of this type of pad not working or was this just an arbitrary number? This will cost citizens an inordinate amount of money for no foreseeable reason. What will happen with all drainfield areas and reserve areas that have all ready been approved. What is the logic behind the minimum install depth? Please consider removing the minimum installation depth of pads.