A.
Purpose. In order to limit development in areas with severe environmental limitations, the following requirements shall apply in all zoning districts. The presence of environmental constraints and the calculation of minimum lot area shall be applicable to the property prior to any development.
(1)
Surface water resources. No portion of the land area of that portion of any parcel may be counted as part of any minimum lot area if subject to the following: ponds; local, state or federal wetlands; streams and watercourses as may be regulated by this law, the Rockland County Drainage Agency, or the New York State Department of Environmental Conservation; the 100-year floodplain as mapped by the Federal Emergency Management Agency. No more than 50% of any watercourse or wetland buffer as defined by this chapter shall count as part of any minimum lot area.
(2)
Steep slopes.
(a)
Not more than 50% of the land area of that portion of each lot may be counted as part of any minimum lot area if subject to steep slopes in excess of 25%.
(b)
No portion of the land area of that portion of a parcel with a slope in excess of 40% may be counted as part of the minimum lot area of a parcel.
(3)
Rock outcrops. Not more than 50% of the area of that portion of a parcel with rock outcrops in excess of 50 square feet may be counted as part of the minimum lot area of a parcel.
B.
Applicability to preexisting lots. Any application for site plan, subdivision, special permit, land disturbance, or any other permit or approval from the Planning Board, or any use or area variance from the Zoning Board of Appeals, that may be required in accordance with this chapter, shall be subject to the provisions of this section.