Leach Field

Leach Field


(also filtration field), a plot of land on which sewage liquid undergoes natural biological decontamination as it is filtered through soil horizons.

Leach fields are established on sandy, sandy loam, and loamy soils with good filtration properties. They are flat and have an area of 0.5–2 hectares (ha). There are dividing ridges measuring 0.8–1 m high. Sewage liquid from which solid waste, fat, and worm eggs have been removed is fed past gates and through open canals onto the field in a layer of 20–30 cm (in the winter it is frozen to 75 cm). The sewage percolates through the soil and runs through drains to a collector. It then is dumped into a river. After the sewage liquid has been absorbed, the surface of the field is tilled and then flooded again.

Permissible daily norms for loads on leach fields are 70–125 cu m/ha for sand, 50–100 cu m/ha for sandy loam, and 40–70 cu m/ha for loam. Leach fields in which the waste is fed into the soil through drains are set up to decontaminate small amounts of sewage. In contrast to sewage farms, leach fields are not used for crop cultivation.


References in periodicals archive ?
The latest state study examines chemical contamination in the former sodium reactor experiment complex, the old conservation yard, the Building 64 Leach Field and the new conservation yard at the field lab.
Specifically, the facility is approved for up to 10,000 gallons per day of wastewater to the leach field and 12,000 gallons per day of wash water and brewing water.
Treated water flows from the tank through baffles into a leach field -- a system of perforated subsurface pipes that allows the water to slowly percolate through the soil.
Few farms have the soil depth and drainage needed for the leach field to remove high concentrations of fats and soluble five-day biochemical oxygen (BO[D.
Health officials believe that the safest way to apply gray water is below the soil surface or under 4 inches of mulch through drip irrigation, perforated pipe, or leach field.
ADS) has added an innovative new product to its Arc line of plastic leaching chambers to meet the needs of septic leach field installers.
While I believe we will have to have the field replaced, I was wondering if you knew if the Aero-Stream really works -- placing oxygen in the septic tank to promote growth of a better type of bacteria, which is better for the system and, in fact, stops the need for replacement of the leach field.
The leach field system will be assessed in order to verify the addition of a new restroom, and the water supply system will be analyzed in order to properly accommodate the additional facilities.
The area chosen for the leach field in this scenario is mostly sand and gravel, with a little over a foot of topsoil.
This allows much greater flexibility in the placement of the leach field, as well as cutting the required size of the leach field by as much as half and it also protects the environment, making it a cost effective solution and a great eco friendly septic system solution.
Sanitary waste would be collected in a storage tank and periodically trucked to an offsite treatment plant, or disposed using a septic tank and leach field, if soil conditions permit.
Canfield said the system has been designed so wastewater and septic can be piped to a septic tank, where treated effluents are then systematically fed to five competitive leaching products and a traditional "stone bed" leach field.