(A) (1) Impervious surfaces are those that do not absorb water.
(2) All buildings, parking areas, driveways, roads, sidewalks, and any areas in concrete and asphalt are considered impervious surfaces within this definition. The impervious surface ratio is a measure of the intensity of land use. It is determined by dividing the total area of all impervious surfaces within the site by the total site area.
(B) The purpose of impervious surface standards is to reduce the impact of storm water runoff created by development. By requiring on-site permeable areas, lot-line-to-lot-line “black topping” is declared by this chapter to be an unacceptable practice.
(C) The following uses shall be limited in the amount of on-site impervious surface areas to the prescribed rations:
(1) Single-family/two-family:
(a) A-1 district, 50%.
(b) All other districts, 60%.
(2) Multi-family and other, 65%.
(3) Institutional, 65%.
(4) Commercial/business:
(a) C-1 district, 100%.
(b) All other districts, 80%.
(5) Industrial/warehousing/storage, 75%.
(Ord. 94-06-01, passed 6-14-94)