No area with topographic slopes from 15% to 25% may be disturbed or developed, except that, in specific situations and for good cause shown by the applicant, an area equivalent to no greater than 15% of the total lot or tract area may be developed, disturbed or re-graded, where the Borough Engineer, in consultation with the Planning Board if deemed necessary, determines the following:
1. Soil erosion, land disturbance and other environmental concerns have been adequately addressed by the applicant;
2. The "Performance Standards" in subsection
35-816.3 hereinbelow have been satisfied; and
3. The applicant has submitted "Grading," "Drainage" and "Landscaping" plans for the entire lot or tract of land to be developed each in accordance with the requirements specified in subsection
35-816.4 hereinbelow, which plans confirm conformance with the aforementioned "Performance Standards," and which further confirm that the rate and velocity of the surface water runoff from the entire site which will result following completion of the proposed development, shall not exceed that which currently exists in the predevelopment conditions.