The design sewage flow of an on-site sewage management system shall be determined in accordance with the Manual for On-Site Sewage Management Systems. The daily sewage flow may be determined by the Department after due consideration of data submitted by the owner or his agent on design criteria. Calculations will be made on the basis of peak flow and not on long term averages.
Ga. Comp. R. & Regs. R. 511-3-1-.13
O.C.G.A. Secs. 12-8-1, 31-2A-6, 31-2A-11.