A.
Applicability. A stormwater management and grading site plan shall be prepared for any project causing soil disturbance of more than one acre or proposed impervious cover of greater than 1/4 acre. It shall be presumed that any land disturbance exceeding these limits will require stormwater structures which must meet the current DEP stormwater regulations and will require site plan review. The calculation of soil disturbance shall be the aggregate of all disturbances on the site or adjacent sites under common ownership or formed by a subdivision within the last five years. This plan shall be reviewed, approved/certified or forwarded to the Land Use Board by the Township Engineer. Such certification or action determination shall be granted prior to sketch plat approval for a minor subdivision, prior to preliminary plat approval for a major subdivision or prior to site plan approval by the Land Use Board, or prior to the issuance of a grading permit by the Construction Department. If the Township Engineer finds that stormwater structures are required, said plan shall be referred to the Land Use Board for review and approval. No grading permit shall be issued without either Township Engineer certification and/or Land Use Board approval. Any development causing a soil disturbance, regardless of the area disturbed, whether or not a building permit is required, shall be reviewed by the Township Engineer for the applicability of this chapter if there exists the possibility that increased rate of water runoff or sedimentation will be caused by the development. If the Township Engineer finds that the development will increase the rate of water runoff or sedimentation will occur, the person causing said soil disturbance shall comply with all provisions of this chapter before proceeding with any additional work. If a project shall cause soil disturbance of more than 5,000 square feet but less than one acre, a soil disturbance and grading plan or stormwater management and grading site plan shall be prepared by the applicant. This plan shall be reviewed, approved and certified by the Township Engineer and by the Hunterdon County Soil Conservation District. In all cases of disturbance greater than 5,000 square feet, the applicant must comply with the soil disturbance provisions of Chapter 290, Soil Erosion and Sediment Control.
B.
Soil disturbance in excess of 5,000 square feet associated with a swimming pool, septic system modification or driveway modification shall also require approval of a soil disturbance and grading plan in accordance with this section. A foundation plan/location survey and as-built soil disturbance and grading plan or stormwater management and grading site plan shall not be required for a swimming pool, septic system modification, driveway modification or single-family residential extension or accessory building with a footprint of less than 2,500 square feet.
C.
Soil disturbance for crop farming purposes shall be exempt from this section except for the conditions in § 295-6R, S, T and U, provided that farming is carried out in accordance with a farm conservation plan and Natural Resources Conservation Services land practices plan and the Township Engineer deems the activity exempt based on information submitted. A copy of the NRCS approval and approved plan must be submitted to the Township Engineer for the activities to be considered exempt.
D.
Planting beds for commercial nursery stock shall not be exempt from this section.