In previous articles, we have discussed the importance of locating an onsite system in an area where you can establish a good grass cover. This is especially important in cold regions, because the grass cover allows snow to accumulate and provide natural insulation against freezing. It is also important to protect the area from any vehicle traffic such as the parking of cars or recreational vehicles, including four-wheelers and snowmobiles. This prevents compaction that could reduce oxygen exchange. It also prevents the penetration of frost to a depth that it will interfere with system operation. We have also discussed the
