A basement generally is a area allocated for human activities such as car parking, and storage. It is also an area that is artificially ventilated. A basement sewage treatment plant requires a lot of air for treatment and there is a lot of air that comes out from the treatment plant, both of which have to be artificially regulated in a basement sewage treatment plant. Such investment will become a very costly affair in the operation of a sewage treatment plant, sometimes just the ventilation system operation electricity cost is more than the plant running cost itself. It is advisable to place the treatment plant in a naturally ventilated location, can be under the walkway, road or even under the open park area.