Whenever a lot containing "steep slopes," defined as slopes with, minimally, a gradient of 15%, is proposed to be developed in a single-family detached residential zone, the following requirements shall apply.
The purpose of this article is to provide for reasonable control of development within the steep slope areas of the Borough in order to minimize the adverse impact caused by the development of such areas, including, but not limited to, erosion, siltation, flooding, surface water runoff, and pollution of potable water supplies from point and nonpoint sources.
A. 
Limited disturbance of steep slope areas is permitted under the following conditions set forth below, but only as per the following:
Steep Slope Category
Maximum Disturbance
(area)
Less than 15%
100%
15% to 19.99%
40%
20% to 24.99%
20%
25% or more
10%
B. 
At the applicable board's or Borough Engineer's discretion, small, isolated pockets of steep slope areas that are under 1,000 square feet in size may be disregarded, provided that no more than 1,000 square feet of any one lot is disturbed, and provided that such action would be in the interest of good planning and would not seriously impair the purpose of this chapter and would otherwise result in practical difficulties to the applicant. Where, however, the applicable board or Borough Engineer finds such pockets to be significantly proximate and of such size as to constitute a substantial contiguous area, the reviewing authority may consider them significant and subject to the regulations of this chapter. In such case, they would be subject to the limitations of maximum disturbance of steep slopes.