(A) For any user that has a qualified retention facility on the property being charged pursuant to this chapter, such user is entitled to a credit to be determined by the Board. Procedures used to calculate the credit and the factor for determining the impact of increased runoff volume shall be prescribed and set by the Board.
(B) Calculation of discharge from developed sites and storm water detention/retention basins, as well as storm water runoff volumes from developed and undeveloped sites shall use methodology which is in accordance with acceptable engineering practice. Peak discharge, hydrograph, flood routing, and runoff volume procedures used by the Soil Conservation Service, the Corps of Engineers, and the Bureau of Reclamation, among others, are considered acceptable.
(C) Any credit given to a user shall reduce the amount of base units attributable to such user, but no credit may reduce the initial base units by more than 50%. Before such credit is granted, the user must establish that its facility meets the definition of a qualified retention facility. In addition, such credits shall be subject to an annual review by the Board to determine continuing compliance with the provisions of this chapter.
(Ord. 18-2005, passed 6-21-2005; Am. Ord. 43-2005, passed 1-3-2006)