A.
No regulated earth disturbance activities within Whitpain Township shall commence until approval by Whitpain Township of the stormwater management site plan or BMP operations and maintenance plan which describes how the permanent (e.g., postconstruction) stormwater BMPs will be properly operated and maintained.
B.
The municipality shall not approve any stormwater management site plan or BMP operations and maintenance plan that is deficient in meeting the requirements of this Part. At its sole discretion and in accordance with this article, when a stormwater BMP operations and maintenance plan is found to be deficient, the municipality may either disapprove the submission and require a resubmission, or in the case of minor deficiencies, the municipality may accept submission of modifications.
C.
Provisions for permanent access or maintenance easements for all physical SWM BMPs, such as ponds and infiltration structures, must be provided as necessary to implement the BMP operation and maintenance (O&M) plan.
D.
The stormwater management site plan shall provide the following information:
(1)
The overall stormwater management concept for general description of the project.
(2)
A determination of site conditions in accordance with the BMP Manual. A detailed site evaluation shall be completed for projects proposed in areas of carbonate geology or karst topography, and other environmentally sensitive areas, such as brownfields.
(3)
Complete hydrologic, hydraulic, and structural computations for all stormwater management facilities. Stormwater runoff design computations and documentation as specified in this Part, or as otherwise necessary to demonstrate that the maximum practicable measures have been taken to meet the requirements of this Part, including the recommendations and general requirements in this section.
(4)
Expected project time schedule.
(5)
An erosion and sediment control plan. The applicant is required to obtain a letter of approval or adequacy from the Conservation District for the erosion and sedimentation control plan.
(6)
The effect of the project (in terms of runoff volumes, water quality, and peak flows) on surrounding properties and aquatic features and on any existing stormwater conveyance system that may be affected by the project.
(7)
Plan and profile drawings of all SWM BMPs, including drainage structures, pipes, open channels, and swales.
(8)
The stormwater management plan shall show the locations of existing and proposed on-lot wastewater facilities and water supply wells.
(9)
A justification must be included in the stormwater management plan if BMPs other than green infrastructure methods and LID practices are proposed to achieve the volume, rate and water quality controls under this Part.
(10)
The stormwater management plan shall include an O&M plan for all existing and proposed physical stormwater management facilities. This plan shall address long-term ownership and responsibilities for O&M as well as schedules and costs for O&M activities.
(11)
The SWM site plan permit application with the required SWM site plan permit fee as listed in the Township Fee Schedule.
E.
Maps.
(1)
Prepare an existing resource and site analysis map (ERSAM) showing environmentally sensitive areas, including, but not limited to, steep slopes, ponds, lakes, streams, wetlands, hydric soils, vernal pools, stream buffers, floodplains, hydrologic soil groups, closed topographic depressions and recharge areas. Land development, existing recharge areas, and any other requirements specifically outlined in the municipal SALDO also shall be included.
(2)
The contents of the map(s) shall include, but not be limited to:
(a)
The location of the project relative to highways, municipal boundaries, or other identifiable landmarks.
(b)
Existing contours at intervals of two feet or less. In areas of slopes greater than 10%, five-foot contour intervals may be used.
(c)
Existing streams, lakes, ponds, or other waters of the commonwealth within the project area.
(d)
Other physical features, including flood hazard boundaries, stream buffers, existing drainage courses, areas of natural vegetation to be preserved, and the total extent of the upstream area draining through the site.
(e)
The locations of all existing and proposed utilities, sanitary sewers, and water lines within 50 feet of property lines.
(f)
A map, which may be done as an overlay, showing soil names and boundaries.
(g)
Limits of earth disturbance, including the type and amount of impervious area that is proposed.
(h)
Proposed structures, roads, paved areas, and buildings.
(i)
Final contours at intervals of two feet or less. In areas of steep slopes (greater than 10%), five-foot contour intervals may be used.
(j)
The name of the development, the name and address of the owner of the property, and the name of the individual or firm preparing the plan.
(k)
The date of submission.
(l)
A graphic and written scale of one inch equals no more than 50 feet; for tracts of 20 acres or more, the scale shall be one inch equals no more than 100 feet.
(m)
A North arrow.
(n)
The total tract boundary and size with distances marked to the nearest foot and bearings to the nearest degree.
(o)
Existing and proposed land use(s).
(p)
A key map showing all existing man-made features beyond the property boundary that would be affected by the project.
(q)
Location of all open channels.
(r)
Overland drainage patterns and swales.
(s)
A 15-foot-wide access easement around all stormwater management facilities or a blanket easement over subject property to provide ingress to and egress from a public right-of-way, where necessary or appropriate, at discretion of the municipality.
(t)
The location of all erosion and sediment control facilities.
(u)
A note on the plan indicating the location and responsibility for maintenance of stormwater management facilities that would be located off site. All off-site facilities shall meet the performance standards and design criteria located within this municipality.
(v)
A statement, signed by the applicant, acknowledging that any revision to the approved drainage plan must be approved by the municipality, and that a revised erosion and sediment control plan must be submitted to the municipality and County Conservation District for approval.
(w)
The following signature block for the Design Engineer:
"I, (Design Engineer), on this date (date of signature), hereby certify that this drainage plan meets all requirements of the Department of Environmental Protection's (DEP's) regulations and the Stormwater Management Ordinance of Whitpain Township."
(x)
The SWM site plan and existing resource and site analysis map (ERSAM) shall be signed and sealed by a professional engineer or professional land surveyor licensed in the Commonwealth of Pennsylvania.
F.
Supplemental information to be submitted to the municipality.
(1)
The following information shall be submitted by the applicant and shall include:
(a)
The overall stormwater management concept for the project designed.
(b)
Stormwater runoff computations required by this Part.
(c)
Stormwater management techniques to be applied both during and after development.
(d)
Expected project time schedule.
(e)
Development stages or project phases, if so proposed.
(f)
An operations and maintenance (O&M) plan in accordance with this Part.
(g)
Results from any soil infiltration testing performed in support of an infiltration BMP.
(2)
A description of the effect of the project (in terms of runoff volumes and peak flows) on adjacent properties and on any existing municipal stormwater collection system that may receive runoff from the project site.
(3)
An approved highway occupancy permit from the Pennsylvania Department of Transportation (PennDOT) district office when drainage towards PennDOT property is proposed.
(4)
Stormwater management facilities.
G.
The following items shall be included in the BMP operations and maintenance plan:
(1)
Map(s) of the project area, in a form that meets the requirements for recording at the offices of the Recorder of Deeds of Montgomery County, and shall be submitted on twenty-four-inch-by-thirty-six-inch or thirty-inch-by-forty-two-inch sheets. The contents of the maps(s) shall include, but not be limited to:
(a)
Clear identification of the location and nature of permanent stormwater BMPs;
(b)
The location of the project site relative to highways, municipal boundaries or other identifiable landmarks;
(c)
Existing and final contours at intervals of two feet, or others as appropriate;
(d)
Existing streams, lakes, ponds, or other bodies of water within the project site area;
(e)
Other physical features, including flood hazard boundaries, sinkholes, streams, existing drainage courses, and areas of natural vegetation to be preserved;
(f)
The locations of all existing and proposed utilities, sanitary sewers, and water lines within 50 feet of property lines of the project site;
(g)
Plan and profile drawings of all SWM BMPs, including drainage structures, pipes, open channels, and swales;
(h)
Proposed final changes to the land surface and vegetative cover, including the type and amount of impervious area that would be added;
(i)
Proposed final structures, roads, paved areas, and buildings; and
(j)
A fifteen-foot-wide access easement around all stormwater BMPs that would provide ingress to and egress from a public right-of-way.
(2)
A description of how each permanent stormwater BMP will be operated and maintained, and the identity of the person(s) responsible for operations and maintenance;
(3)
The name of the project site, the name and address of the owner of the property, and the name of the individual or firm preparing the plan; and
(4)
A statement, signed by the landowner, acknowledging that the stormwater BMPs are fixtures that can be altered or removed only after approval by Whitpain Township.
H.
Authorization to construct and term of validity. The municipality's approval of a stormwater management plan authorizes the regulated activities contained in the stormwater management plan for a maximum term of validity of five years following the date of approval. The municipality may specify a term of validity shorter than five years in the approval for any specific stormwater management plan. Terms of validity shall commence on the date the municipality signs the approval for a stormwater management plan. If an approved stormwater management plan is not completed according to § 125-13F within the term of validity, then the municipality may consider the stormwater management plan disapproved and may revoke any and all permits. Stormwater management plans that are considered disapproved by the municipality shall be resubmitted in accordance with § 125-13 of this Part.
I.
As-built plans, completion certificate, and final inspection.
(1)
The developer shall be responsible for providing as-built plans of all SWM BMPs included in the approved stormwater management plan. The as-built plans and an explanation of any discrepancies with the construction plans shall be submitted to the municipality.
(2)
The as-built submission shall include a certification of completion signed by a qualified person verifying that all permanent SWM BMPs have been constructed according to the approved plans and specifications. The latitude and longitude coordinates for all permanent SWM BMPs must also be submitted, at the central location of the BMPs. If any licensed qualified persons contributed to the construction plans, then a licensed qualified person must sign the completion certificate.
(3)
After receipt of the completion certification by the municipality, the municipality may conduct a final inspection.