Trench width should not be less than 30 5 cm 1 and not greater than 90 cm 3.
Septic system drainfield size.
This article provides diagnostic and policy or code and design questions and answers about the required size of septic drainfields soakbeds leach fields and similar onsite wastewater disposal systems.
Typically septic trenches are 8 to 12 inches wide in some applications or 18 to a maximum of 36 wide in traditional conventional septic drainfield designs.
The inter trench spacing could be considered as a potential system reserve area.
Septic drainfield trench width specifications.
If the soil has good percolation conditions it s comparatively sandy and waste water seeps down with little resistance figure a seepage field of 4 500 square feet say 100 feet long and 45 feet wide for a three bedroom house with normal waste output.
Nebraska department of environmental quality ndeq has determine the square feet of drainfield trench required.
Septic drainfield size faqs questions answers about the required size of a septic soakbed leachfield or drainfield.
Only 24 inches shall be allowed for absorption area calculations.
Drainfield size the size of the drainfield is based on the number of bedrooms and soil characteristics and is given as square feet.