I Conventional Septic Systems

All conventional type systems have both a septic tank and Effluent Disposal Area (EDA) or Leachfield. The septic tank is a settling and decomposition chamber it allows the sewage solids to separate from the liquid, undergo partial decomposition, and be stored as sludge at the bottom of the tank. The effluent or liquid from the septic tank then flows by gravity or pumping into the EDA where it infiltrates into the soil.

The Leachfield or Drainage Field can be made up of several different type of material.

Stone & Pipe Systems: : This system is constructed of Septic Stone and PVC Piping. This system cannot be driven on and is one of the largest systems that have NHDES Subsurface Bureau Approval.

Drywell: This a Pre-Cast Concrete Chamber that is inexpensive, but requires well drained soils.

Chambered Systems: These systems can be built with Concrete Chambers or Plastic chambers. These system can be designed to be driven on, if necessary. The advantage the chambered system has over the Stone & Pipe is that you can reduce the size by 40% for Residential Use.