(1) An Innovative EDS may be used for dwellings, not part of a Large-Flow Development, in situations where:
- (a) The site has vertic soil characteristics or a permeability of greater than 240 MPI. For the minimum number of soil tests required, see Table 19.
- (b) Design flow shall not exceed 1,800 GPD per lot.
- (c) Slope within the discharge area shall not exceed 12 percent.
(2) The engineer shall incorporate the following in all Innovative EDS designs:
- (a) The effluent discharge shall meet additional setback requirements in Table 6 and shall not cause a public health nuisance.
- (b) Ponding and run-off in the discharge area shall be prevented by evenly distributing the effluent and providing a vegetative cover. Multiple discharge areas may be utilized to meet these requirements,
- (c) The sewage shall be treated to the secondacy effiuent standard or better,
- (d) The effluent shall be disinfected to the NSF/ ANSI Standard 46, treated to the NSF/ ANSI Standard 350, or disinfected by other ADPH approved methods.
- (e) A sampling port shall be installed after disinfection and prior to discharge.
- (f) The effluent shall not escape the lot where generated.
- (g) Final grading of the site shall divert storm water around the discharge area(s).
- (h) Construction standards and materials shall comply with the applicable sections found in 420-3-1-.58 Gravel Field Standard Construction Specifications.
- (3) No Permit to Install sha11 be issued for an Innovative EDS until after a review and concurrence by the LHD and ADPH.
- (4) In the event that an existing EDS cannot be repaired or relocated and no longer meets the conditions of this rule, an OSS shall be installed.
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.
History: New Rule: Published December 30, 2022; effective February 13, 2023.