A. 
Prior to the final approval of subdivision and/or land development plans, or the issuance of any permit, or the commencement of any land-disturbance activity, the owner, subdivider, developer or his agent shall submit a stormwater management plan to the Township for approval.
B. 
In order to assess whether the developer will meet the requirements of the Township stormwater management plan, a plan submission should be reviewed by the Township Engineer.
The following activities are specifically exempt from the plan preparation provisions of this chapter:
A. 
Land disturbances affecting less than 20,000 square feet of ground surface or those with less than 3,000 square feet of impervious surface.
B. 
Land disturbance associated with existing one- and two-family dwellings.
C. 
Use of land for gardening for home consumption.
D. 
Agriculture, when operated in accordance with a conservation plan or erosion and sedimentation control plan prepared by the Conservation District.
E. 
Forest management operations which are following the Department of Environmental Protection management practices contained in its publication "Soil Erosion and Sedimentation Control Guidelines for Forestry" and are operating under an erosion and sedimentation control plan.
F. 
Applications for small developments shall include a plan which describes, narratively and graphically, the type and location of proposed on-site stormwater management techniques or the proposed connection to an existing storm sewer system. The plan should show accurately site boundaries, five-foot interval contours, location of watershed and/or subarea boundaries on the site (if applicable), and any watercourses, floodplains or existing drainage facilities or structures located on the site. Depending upon actual site conditions, number of lots involved and similar considerations, the Township shall determine if the plan must be prepared by a registered professional engineer.
G. 
The Township Engineer shall review and approve the proposed provisions for stormwater management for a small development. Where the applicant is proposing to connect to an existing storm sewer, the Township Engineer shall determine that sufficient capacity exists in the storm sewer from the point of connection to the point of outlet in the natural drainage system. The Engineer shall also determine if the proposed development site is part of a large parcel or tract for which a stormwater management plan was approved previously and, therefore, subject to any specific stormwater management control contained in the prior plan.
The following items, where appropriate, shall be included in the plan:
A. 
General.
(1) 
General description of project.
(2) 
General description of erosion and sedimentation controls.
(3) 
General description of stormwater controls both during and after development.
(4) 
Expected project time schedule, including anticipated start and completion dates.
(5) 
Training and experience of person(s) preparing the plan.
B. 
Map(s) of the project area showing:
(1) 
The location of the project relative to highways, municipalities or other identifiable landmarks.
(2) 
Existing contours at intervals of two feet. In areas of steep slopes (greater than 15%), five-foot contour intervals may be used.
(3) 
Streams, lakes, ponds or other bodies of water within the project area or which will be affected by runoff from the project.
(4) 
Other physical features, including existing drainage swales and areas of natural vegetation to be preserved.
(5) 
Locations of proposed underground utilities, sewers and water lines.
(6) 
An overlay showing soil types and boundaries.
(7) 
Proposed changes to land surface and vegetative cover.
(8) 
Areas to be cut or filled.
(9) 
Proposed structures, roads, paved areas and buildings.
(10) 
Final contours at intervals of two feet. In areas of steep slopes (greater than 15%), five-foot contour intervals may be used.
C. 
Erosion and sedimentation controls.
(1) 
The staging of all earthmoving activities must be described, including cuts and fills, streets, underground utilities, sewer and water lines, buildings, driveways, parking areas, recreational areas, other structures, etc.
(2) 
The type, location and extent of all erosion and sedimentation control measures must be shown on a map and described, including all calculations, assumptions and criteria used in designing the controls and a schedule for their implementation.
D. 
Stormwater management controls.
(1) 
All stormwater management controls must be shown on a map and described, including:
(a) 
Groundwater recharge methods, such as seepage pits, beds or trenches. When these structures are used, the locations of septic tank infiltration areas and wells must be shown.
(b) 
Other control devices or methods, such as rooftop storage, semipervious paving materials, grass swales, parking lot ponding, vegetated strips, detention or retention ponds, storm sewers, etc.
(c) 
Schedule for installation of the control measures and devices.
(2) 
All calculations, assumptions and criteria used in the design of the control device or method must be shown.
E. 
Maintenance program. A maintenance program for all stormwater management control facilities must be included. This program must include the proposed ownership of the control facilities and detail the financial responsibility for any required maintenance.
A. 
The Township shall forward a copy of the plan to the County Planning Commission and the Conservation District for review.
B. 
The Township Engineer and Planning Commission shall review the plan and comments from the Conservation District and County Planning Commission and shall recommend whether the plan be approved or disapproved.
C. 
The Township shall notify the applicant within 45 calendar days from receipt of a complete plan submission of its decision.
D. 
A disapproval shall contain the reasons for disapproval and a listing of the plan deficiencies.
E. 
Failure of the Township to render a decision within the forty-five-day time limit shall be deemed an approval.
A modification to an approved stormwater management plan which involves a change in control methods or techniques, or which involves the relocation or redesign of control measures, or which is necessary because soil or other conditions are not as stated on the approved application (as determined by the Township Engineer) shall be approved under the procedures contained in § 579-14 of this chapter. The Township Engineer shall notify the applicant when such plan modification is required.