South Dakota Administrative Rules
Title 74 - Department of Environment And Natural Resources
Article 74:53 - Water supply and treatment systems
Chapter 74:53:01 - Individual and small on-site wastewater systems
Section 74:53:01:36 - Requirements for an absorption bed
Current through Register Vol. 50, page 114, March 25, 2024
Seepage beds may not be constructed where the soil percolation rate is 30 or more minutes per inch. An absorption bed may be designed and constructed for gravity or pressure flows in accordance with the following criteria:
(1) A gravity absorption bed system shall consist of a level bed not exceeding 100 feet in length, 15 feet in width, and 3 feet in depth. Each distribution line shall extend the length of the bed and be spaced not greater than 5 feet on center across the bed width. The distribution lines shall be preceded by a distribution box to provide uniform distribution of effluent. The outermost distribution lines may not be closer than 30 inches to the bed walls and all ends shall be capped if it is not a closed-loop system;
(2) A pressurized absorption bed system may exceed the length and width requirements in subdivision 74:53:01:36(1) but must not be more than 3 feet in depth. The bed bottom shall be level. Each distribution line shall be installed within the perimeter limits of the bed and spaced not greater than 10 feet on center across the bed. The bed shall be center-fed by a manifold pipe. The outermost distribution lines may not be closer than 5 feet to the bed wall perimeter. The distribution system shall be closed -loop or have all ends capped;
(3) Additional requirements for gravity and pressurized absorption bed systems are as follows:
General Authority: SDCL 34A-2-93.
Law Implemented: SDCL 34A-2-20.