What must a leaching chamber be in terms of construction?

A leaching chamber is designed to facilitate the gradual absorption of effluent into the surrounding soil, promoting natural filtration and treatment. The construction of a leaching chamber must enable it to function efficiently without hindrance. Being bottomless and tunnel-like allows the chamber to effectively disperse effluent across a broader area of soil, enhancing the contact with microorganisms that break down contaminants. This design ensures that the effluent can flow freely through the chamber and into the ground, maximizing the absorption and treatment process.

The other potential construction options, such as being completely sealed or solid walled, would restrict the flow of effluent into the surrounding soil, defeating the purpose of the leaching chamber. A two-chambered design is not typically a requisite for leaching chambers, as their primary function is rooted in providing an open space for effluent distribution rather than housing separate compartments. Thus, the bottomless, tunnel-like construction of a leaching chamber is essential for its intended function in on-site sewage facilities.