Purpose. These grading plan requirements are for the purpose of confirming that proposed applicable developments will not result in flooding, pooling or other drainage-related problems at the lot on which the development is proposed or on adjacent properties. Each grading plan must therefore confirm, to the Township Engineer's satisfaction, that the proposed applicable development on each lot will cause water to drain property from the lot on which such development is proposed, and that such development will not increase the amount of water which drains onto adjoining lots (except as otherwise permitted as part of a final site plan, subdivision, or other Planning Board, Zoning Board or Township Committee approval) or adversely change the manner in which it drains. All lots where applicable development is proposed must be graded to direct surface water runoff away from structures and toward the frontage road or other defined drainage paths that meet the Township Engineer's approval. Where a drainage problem already exists, the drainage plan must confirm, to the Township Engineer's satisfaction, that the proposed development will reduce the impact on adjoining tracts to the greatest extent reasonably possible by causing the surface water to drain into nearby streets, approved drainage facilities or other Township-approved devices.