(1) As an alternative to a trench system, a pad or bed may be utilized. All sewage subject to this paragraph shall be pretreated to the secondary effluent standard.
- (a) The total bottom area for all pads shall be computed by dividing the design flow by the loading rate found in Table 10 and rounded up to the next whole foot. The total bottom area for all beds shall be computed by dividing the design flow by the loading rate found in Table 11 and rounded up to the next whole foot.
- (b) The pad shall meet the construction standard found in the manufacturer's design manual or meet the aggregate and cover standard found in 420-3-1-.58(7) Gravel Field Standard Construction Specifications. A bed shall meet the aggregate and cover standard found in 420-3-1-.58(7) Gravel Field Standard Construction Specifications.
- (c) For pads not utilizing proprietary distribution, a programmable timer and control panel shall be employed to regulate the dosing frequency and volume for uniform distribution.
Author: Thad Pittman, Matthew Conner. Ken Stephens, Bob Bright
Statutory Authority: Code of Ala. 1975, §§22-2-2(4); 22-2-2(6); 22-10-1, et seq.; 22-26-1 et seq.
Editor’s Note: Previous Rule .84 was renumbered .59 per certification published December 30, 2022; effective February 13, 2023.
History: New Rule: Filed January 19, 2017; effective March 5, 2017. Repealed and New Rule: Published December 30, 2022; effective February 13, 2023.