(a) The park area and park roadways shall be so graded that there will be no depressions in which surface water will accumulate and remain for a period of time that would constitute a health and safety violation as determined by the enforcement agency. The ground shall be sloped to provide storm drainage run-off by means of surface or subsurface drainage facility.

(b) Each lot shall be graded to prevent the migration of water to the underfloor area of a unit, or accessory building or structure, or building component. Other methods to prevent the migration of water beneath a unit, accessory building or structure, or building component may be approved by the department as alternates, in accordance with section 1016 of this chapter.

(c) To provide for unanticipated water entering the area beneath a unit, accessory building or structure, or building component, that area shall be sloped to provide for drainage to an approved outside drainage way. Other positive passive drainage methods may be approved by the department as an alternate, in accordance with section 1016 of this chapter.

(d) Drainage from a lot, site, roadway or park area shall be directed to a surface or subsurface drainage way and shall not drain onto an adjacent lot, or site.

(e) All vegetation shall be cleared from the area of the lot beneath a unit or accessory building or structure.

(f) Fills necessary to meet the grading requirements of this subsection shall comply with section 1045 of this chapter.

(g) Minor load bearing grading and area fills that are made with a compacted class 2 aggregate and that do not exceed six (6) inches in depth, do not require additional approvals.