For any regulated activity, unless exempt per the provisions of §
342-106:
A. Preparation and implementation of an approved SWM site plan is required.
B. No regulated activity shall commence until the Borough or Borough
designee issues a written permit for the project, which demonstrates
compliance with the requirements of this chapter and, if required,
a letter of adequacy has been issued by the Conservation District
for an erosion and sediment control plan.
C. The preliminary or final approval of subdivision and/or land development
plans and the issuance of any building or occupancy permit shall not
proceed until the applicant has received written approval of a SWM
site plan from the Borough.
D. The SWM site plan approved by the Borough shall be on site throughout
the duration of the regulated activity.
The SWM site plan shall consist of a general description of the project including items described in §
342-304, calculations, maps, and plans. A note on the plans shall refer to the associated computations and erosion and sediment control plan by title and date. The cover sheet of the computations and erosion and sediment control plan shall refer to the associated plan by title and date. All SWM site plan materials shall be submitted to the Borough in a format that is clear, concise, legible, neat, and well organized; otherwise, the SWM site plan shall not be accepted for review and shall be returned to the applicant. The following items shall be included in the SWM site plan:
A. General.
(1)
A general description of the proposed project;
(2)
A listing of all regulatory approvals required for the proposed
project and the status of the review and approval process for each.
Final approval or adequacy letters must be submitted to the Borough
prior to (or as a condition of) the Borough's issuing final approval
of the SWM site plan. Proof of application or documentation of required
permit(s) or approvals for the programs listed below shall be part
of the SWM site plan, if applicable:
(a)
NPDES Permit for stormwater discharges associated with construction
activities;
(b)
PADEP permits as needed:
[1]
PADEP joint permit application;
[2]
Chapter 105 (Dam Safety and Waterway Management);
[3]
Chapter 106 (Floodplain Management);
(c)
PennDOT highway occupancy permit;
(d)
Erosion and sediment control plan letter of adequacy; and
(e)
Any other permit under applicable state or federal regulations.
(3)
A statement, signed by the applicant, acknowledging that any
revision to the approved SWM site plan shall be submitted to and approved
by the Borough, and that a revised erosion and sediment control plan
shall be submitted to, and approved by, the Conservation District
or Borough (as applicable) for a determination of adequacy prior to
construction of the revised features.
(4)
The stormwater management Certification to be signed and sealed
by the qualified licensed professional responsible for the preparation
of the SWM site plan. (Refer to Appendix A-6.)
(5)
The following signature block for the municipality:
On behalf of West Grove Borough, (Municipal official
or designee), on this date [Signature date], has reviewed and hereby
certifies to the best of my knowledge that the SWM site plan meets
all design standards and criteria of the Municipal Ordinance No. [number
assigned to ordinance]."
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B. Maps or plan sheets. Map(s) or plan sheets of the site shall be submitted on minimum twenty-four-inch by thirty-six-inch sheets and shall be prepared in a form that meets the requirements for recording at the Chester County Office of the Recorder of Deeds and the requirements of the Operation and Maintenance (O&M) Plan and O&M agreement (Article
VII). If the SALDO has additional or more stringent criteria than this chapter, then the SALDO criteria shall also apply. Unless otherwise approved by the Municipal Engineer, the contents of the maps or plan sheets shall include, but not be limited to:
(1)
A location map, with a scale of one inch equals 2,000 feet or
greater, showing the site location relative to highways, municipal
boundaries, or other identifiable landmarks.
(2)
The name of the project, tax parcel number(s), and the names,
addresses and phone numbers of the owner of the property, the applicant,
and firm preparing the plan.
(3)
Signature and seal of the qualified licensed professional(s)
responsible for preparation of the maps and plan sheets.
(4)
The date of SWM site plan submission and revision dates, as
applicable.
(5)
A graphic and written scale of one inch equals no more than
50 feet.
(7)
Legal property boundaries, including:
(a)
The total project property boundary and size with distances
marked to the nearest foot and bearings to the nearest degree.
(b)
Boundaries, size and description of purpose of all existing
easements and deed-restricted areas of the project property, with
distances marked to the nearest foot and bearings to the nearest degree.
(8)
Existing natural resources and natural or man-made hydrologic
features that are located within the site or receiving discharge from,
or that may otherwise be impacted by, the proposed regulated activity,
including, but not limited to:
(a)
All existing natural resources, hydrologic features and drainage
patterns including natural waterways, water bodies, wetlands, streams
(intermittent and perennial), ponds, lakes, vernal pools, etc., natural
infiltration areas and patterns, areas of significant natural evapotranspiration,
and other water features and aquatic resources.
(b)
Any existing man-made drainage features, BMPs, conveyances,
facilities, open channels, swales, drainage patterns, or other flood,
stormwater or drainage control features.
(c)
For the site, discharge points and locations of concentrated
flows and their drainage areas.
(d)
For named waters, show names and their watershed boundaries
within the site.
(f)
For the water bodies, streams and wetlands identified in Subsection
B(8)(a), label or otherwise show the following attributes, if applicable:
[1]
The designated use as determined by PADEP (25 Pa. Code Chapter
93);
[2]
Impairments listed on the PADEP "Integrated List" (as updated)
and the listed source and cause of impairment;
[3]
Name, date, and target pollutant(s) for any approved total maximum
daily load (TMDL); and
[4]
Drainages to water supply reservoirs.
(g)
Areas that are part of the Pennsylvania Natural Diversity Inventory
(PNDI) and a list of potential impacts and clearances received (for
regulated activities involving one acre or more proposed earth disturbance).
(h)
Woods, vegetated, riparian buffers and other areas of natural
vegetation.
(i)
Topography using contours (with elevations based on established
benchmarks) at intervals of two feet. In areas of slopes greater than
15% five-foot contour intervals may be used. The datum used and the
location, elevation and datum of any benchmarks used shall be shown.
(j)
Areas classified by the Borough as steep slopes.
(k)
Soil names and boundaries, general type of soils with Hydrologic
Soil Group noted, and in particular note areas most conducive to infiltration
BMPs, such as groups A and B, etc., estimated permeabilities in inches
per hour, and location and other results of all soil tests and borings.
(l)
If present, areas with underlying carbonate geologic units,
existing sinkholes, subsidence or other karst features, and any associated
groundwater recharge areas with increased vulnerability to contamination.
(m)
Any contaminated surface or subsurface areas of the site.
(n)
Water supply wells.
[1]
Location of existing well(s) on the project property and delineation
of the(ir) recharge area(s) (if known), or a fifty-foot diameter assumed
recharge area;
[2]
Location of existing well(s) within 50 feet beyond the boundary
of the project property boundary (if public water supply is proposed
for the regulated activity); and
(o)
Current FEMA 100-year floodplain boundaries, elevations, and
floodway boundaries for any special flood hazard areas on or within
100 feet of the property.
(p)
Boundaries of riparian buffer(s) as required by §
342-312.
(9)
Location of the proposed regulated activity, limits of earth disturbance (disturbed area), and BMPs and conveyances relative to the location of existing natural resources and hydrologic features and special management areas resulting from the site design process of §
342-304.
(10)
Description of existing and proposed ground cover and land use
including the type and total area.
(11)
Existing and proposed man-made features including roads, paved
areas, buildings, and other impervious and pervious surfaces on the
project property (or an appropriate portion of the property as determined
in consultation with the Borough Engineer) and within the proposed
disturbed area, and including the type and total area of the following:
(a)
Existing impervious surfaces installed after April 2, 2014;
(b)
Existing impervious surfaces proposed to be replaced;
(c)
Existing impervious surfaces to be permanently removed and replaced
with pervious ground cover;
(d)
New or additional impervious surfaces; and
(e)
Percent of the site covered by impervious surfaces for both
the existing and proposed postconstruction conditions.
(12)
The total extent of the upstream area draining through the site.
(13)
A plan note shall be included on the plan and in the stormwater
management agreement noting the amount of impervious surface that
the stormwater facilities have been designed to handle.
(14)
All BMPs, conveyances and other stormwater management facilities
shall be located on the plan sheets, including design drawings, profile
drawings, construction details, materials to be used, description
of function, etc.
(15)
Complete delineation of the flow paths used for calculating
the time of concentration for the predevelopment and postconstruction
conditions shall be included.
(16)
The locations of all existing and proposed utilities, sanitary
sewers, on-lot wastewater facilities (including subsurface tanks and
leach fields), and water supply lines within the site and within 50
feet beyond the proposed limits of earth disturbance.
(17)
A grading plan, including all areas of proposed earth disturbance
and the proposed regulated activity and delineating the boundary or
limits of earth disturbance of the site. The total disturbed area
of the site shall be noted in square feet and acres.
(18)
Proposed final grade elevations and contours at intervals of
two feet. In areas of steep slopes (greater than 15%), five-foot contour
intervals may be used.
(19)
For each proposed BMP and conveyance included in the SWM site
plan (including any to be located on any property other than the property
being developed by the applicant), the following shall be included
on the SWM site plan map or plan sheets:
(a)
Identification of the person responsible for ongoing inspections,
operation, repair, and maintenance of the BMP or conveyance after
completion of construction.
(b)
Delineation of the land area, structures, impervious surfaces,
and conveyances draining to and from the BMP or conveyance.
(c)
Easements, as per the requirements of Article
VII, that shall include:
[1] Boundaries labeled with distances shown in feet
and bearings to the nearest degree;
[2] Notes or other documentation, as needed, to grant
the Borough the right of access to all BMPs and conveyances for the
purposes of inspection and enforcement of the requirements of this
chapter, and any applicable O&M plans and O&M agreements;
[3] Notes or other documentation, as needed, to grant
the Borough the right of access to all roadways necessary to access
all BMPs and conveyances, where roadways are not to be dedicated to
the Borough;
[4] Notes or other documentation as needed to grant
the owner of any BMP or conveyance the right of access for the purpose
of inspection, operation, maintenance, and repair of the BMP or conveyance
that is to be owned, operated and maintained by a person other than
the Borough, and other than the owner of the property on which the
BMP or conveyance is located;
[5] A minimum twenty-foot wide perimeter (or other
width as determined in consultation with the Municipal Engineer) around
all BMPs and conveyances;
[6] Sufficient vehicular ingress to and egress from
a public right-of-way or roadway, as determined in consultation with
the Borough Engineer; and
[7] Accompanying notes or other documentation as needed, and in accordance with Article
VII describing the type, purpose and total area of easements, who the easement is granted to, and the rights, duties and obligations of the parties with respect to every BMP or conveyance.
(d)
Boundaries of land areas (if any) for which deed restrictions
are required for the purpose of protecting and prohibiting disturbance
to a BMP or conveyance, indicating the area to which the restriction
applies with distances shown in feet and bearings to the nearest degree,
and a written description of the type, purpose and nature of the restriction.
(e)
Other items that may be needed to comply with all other requirements of Article
VII.
C. A written description of the following information shall be included
in the SWM site plan:
(1)
Existing features, conditions, natural resources, hydrologic features, and special management areas [as listed in Subsection
B(8)];
(2)
How the site design achieves the requirements of §
342-304, and if applicable, where they could not be achieved and why;
(3)
The overall stormwater management design concept for the project and how the site design achieves the requirements of Article
III;
(4)
Proposed features and conditions, proposed erosion and sediment
control features, proposed BMPs, conveyances, and any other stormwater
facilities;
(5)
A description of the effect of the project (in terms of flow
alteration and runoff volumes, water quality and peak flows, etc.)
on existing natural resources, hydrologic features and special management
areas, adjacent and downgradient properties, and any existing municipal
or other stormwater conveyance system(s), that may be affected by
or receive runoff from the regulated activity (whether located within
or outside of the area of the regulated activity), and specifics of
how erosion, water quality and flow impacts will be avoided or otherwise
mitigated;
(6)
Proposed nonpoint source pollution controls and justification
and confirmation that the proposed project will not result in any
increased pollutant loadings to any existing stream or stream impairment
identified by PADEP, or to any receiving water body;
(7)
Expected project time schedule; and
(8)
Description of construction stages or project phases, if so
proposed.
(9)
A detailed justification must be included in the SWM site plan
if BMPs other than green infrastructure methods, LID practices, or
CD are proposed to achieve the volume, rate, and water quality controls
under this chapter.
D. A detailed site evaluation conducted by a qualified licensed professional for projects proposed in areas of carbonate geology or karst topography, and other environmentally sensitive areas, such as contaminated sites and brownfields, as described in §
342-301O and
342-301R of this chapter.
E. Stormwater runoff design computations and documentation, such as hydrologic, hydraulic, and structural computations, assumptions, BMP loading ratios, etc., consistent with the guidelines and criteria presented in the PA BMP Manual (as amended) or Article
III or other guidance acceptable to the Borough Engineer, and used in the design of the BMPs, conveyances and other features proposed to be utilized for stormwater management, or as otherwise necessary to demonstrate that the requirements of this chapter have been met, specifically including the requirements in §§
342-301 and
342-304 through
342-309.
F. Inspections, operation and maintenance requirements. The following documents shall be prepared and submitted to the Borough for review and approval as part of the SWM site plan, in accordance with the requirements of Article
VII, for each BMP and conveyance included in the SWM site plan (including any to be located on any property other than the property being developed by the applicant):
(3)
Any easement agreements that are needed to ensure access, inspection,
maintenance, operation, repair and permanent protection of any permanent
BMP(s) and conveyances associated with the regulated activity;
(4)
Any written deed, deed amendment or equivalent document (if
needed) to be recorded against a subject property, as shown on the
SWM site plan maps or plan sheets, or recorded plan sheets for the
purpose of protecting and prohibiting disturbance to a BMP or conveyance;
and
(5)
Written approval, easement agreements, or other documentation for discharges to adjacent or downgradient properties when required to comply with §
342-301G and Article
VII of this chapter.
G. An erosion and sediment control plan, where applicable, as prepared
for and submitted to the Conservation District and/or Borough. A letter
of adequacy from the Conservation District, if applicable, must be
submitted to the Borough prior to (or as a condition of) the Borough's
final approval of the SWM site plan.
H. A highway occupancy permit from the Pennsylvania Department of Transportation
(PennDOT) District Office must be submitted to the Borough prior to
(or as a condition of) the Borough's final approval of the SWM
site plan when utilization of a PennDOT storm drainage system is proposed.
A complete SWM site plan that complies with all applicable provisions of §
342-402 shall be submitted to the Borough for review and approval, as follows:
A. The SWM site plan shall be coordinated with the applicable state
and federal permit process and the Borough SALDO review process. All
permit approvals or letters of adequacy not yet received by the applicant
at the time of submittal of the SWM site plan to the Borough must
be submitted to the Borough prior to (or as a condition of) the Borough's
final approval of the SWM site plan, in the form of issuance of a
SWM permit.
B. For projects that require SALDO approval, the SWM site plan shall
be submitted by the applicant as part of the preliminary plan submission
where applicable for the regulated activity.
C. For regulated activities that do not require SALDO approval, the
SWM site plan shall be submitted by the applicant for review by the
Borough or its designee, as determined by Borough staff.
D. The number of copies of the SWM site plan to be submitted by the
applicant for review shall be in accordance with instructions from
the Borough. The applicant is responsible for providing the required
plan copies to the Borough for distribution.
E. The corresponding review fee shall be submitted to the Borough simultaneously
with the SWM site plan, per the Borough's fee schedule.
F. Any submissions to the Borough that are found to be incomplete shall
not be accepted for review and shall be returned to the applicant
within 90 days with a notification in writing of the specific manner
in which the submission is incomplete.
G. Financial security, per the requirements of §
342-110, shall be submitted to the Borough prior to approval of the SWM site plan.
Any SWM site plan deemed inconsistent or noncompliant may be revised and resubmitted with the revisions addressing the Borough Engineer's concerns documented in writing. The submission shall be addressed to the Borough in accordance with §
342-403 of this chapter, distributed accordingly, and be subject to review as specified in §
342-404 of this chapter. The applicable Borough review fee shall accompany a resubmission of a SWM site plan previously determined to be inconsistent or noncompliant.