Leaching Chamber Drainfields
http://schroederseptic.com/wp-content/uploads/2014/03/drainage-system-image-300x170.jpg 300w, http://schroederseptic.com/wp-content/uploads/2014/03/drainage-system-image.jpg 1053w" sizes="(max-width: 368px) 100vw, 368px" />A leaching chamber drainfield has been around for the last 10-15 years. A stone and pipe drainfield has a disadvantage. Stone carries a limestone dust. The stone is washed before conventional installation but it does not get rid of all the dust. Whatever dust is still on the stone is washed into the soil and clogs the soil. This reduces the life of a septic system. Leaching chambers were developed to counter this disadvantage.
The size of a leaching chamber drainfield depends on the gallons/day produced by a residence/business and the loading rate of the soil. The combination of the two determines how many square feet the leaching chamber drainfield must be. For example, a three bedroom home that has a soil test with a 0.5 loading rate needs a drainfield with 900 square feet. Each individual leaching chamber carries a certain amount of square feet. If one leaching chamber carries 20 square feet and the example above requires 900 square feet, than we would need 45 leaching chambers. One disadvantage to leaching chambers is they require more room than a stone and pipe drainfield.
First, trenches or cells are dug to install the conventional component. The bottom of each trench is dug at the same elevation so the effluent is evenly distributed in the cell. Most of the time, the trenches are dug at the same elevation. However, some trenches are dug at different elevations because of a shallow limiting factor and a sloped contour. As the trench is dug, the leaching chambers are assembled in the trench. Two observation wells are installed on the top of the leaching chambers for monitoring purposes. Before the trenches are backfilled, they are inspected by the governing authority. Finally, the trench is backfilled.