The following items shall be included in the SWM site plan:
B.
The municipality shall not approve any SWM site plan that is deficient
in meeting the requirements of this chapter. At its sole discretion
and in accordance with this article, when a SWM site 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, as necessary to implement the operation and maintenance (O&M) plan discussed in § 125-401E(9).
D.
The following signature blocks:
(1)
A statement, signed by the Township Engineer, that the SWM site
plan complies with the Township Stormwater Management Ordinance (this
chapter), as follows:
"I, (Township Engineer), on this date
(Signature Date), has reviewed and hereby certifies
that the SWM site plan meets all design standards and criteria of
the Londonderry Township Stormwater Management Ordinance."
(2)
A statement, signed by all landowners, acknowledging that the
stormwater BMPs are fixtures that cannot be altered or removed without
prior approval by the Township.
|
"Acknowledgment of Permanence of BMPs:
| |
|
I/we, the undersigned landowners, hereby represent that no person
shall modify, remove, fill, landscape, or alter any Stormwater Management
BMPs, facilities, areas, or structures without the written approval
of Londonderry Township.
| |
|
__________
|
__________
|
|
Date
|
Landowner(s)"
|
(3)
A statement, signed by all landowners, referencing the operation
and maintenance (O&M) agreement and stating that the O&M agreement
is part of the stormwater management site plan, as follows:
|
I/we, the undersigned landowners, hereby acknowledge that an
operation and maintenance agreement has been entered into with the
Township and shall be part of the stormwater management site plan.
| |
|
__________
|
__________
|
|
Date
|
Landowner(s)
|
(4)
The following signature block for the qualified professional
preparing the stormwater management plan:
|
"I __________________, hereby certify that the stormwater management
site plan meets all design standards and criteria of the Londonderry
Township Stormwater Management Ordinance.
| |
|
_____
|
__________
|
|
Date
|
Qualified Professional Signature"
|
E.
The SWM site plan shall provide the following information:
(1)
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 V). 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:
(a)
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 municipality
prior to (or as a condition of) the municipality'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:
[1]
NPDES permit for stormwater discharges associated with construction
activities;
(b)
PennDOT highway occupancy permit;
(c)
Erosion and sediment control plan letter of adequacy; and
(d)
Any other permit under applicable state or federal regulations.
(2)
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.
(3)
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.
(4)
Signature and seal of the qualified professional(s) responsible
for preparation of the maps and plan sheets.
(5)
The date of SWM site plan submission and revision dates, as
applicable.
(6)
A graphic and written scale of one inch equals no more than
50 feet.
(7)
A North arrow.
(8)
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.
(9)
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 § 125-401E(9)(a), label or otherwise show the following attributes, if applicable:
(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
bench marks) 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 bench marks used shall
be shown.
(j)
Areas classified by the municipality 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.
Four copies of the SWM site plan shall be submitted as follows:
A.
SWM site plans shall be reviewed by the municipality for consistency
with the provisions of this chapter.
B.
Any submissions to the municipality that are found to be incomplete
shall not be accepted for review and shall be returned to the applicant
within 14 calendar days with written notice of the specific manner
in which the submission is incomplete.
C.
The municipality shall notify the applicant in writing within 45
calendar days whether the SWM site plan is approved or disapproved.
If a project requires both a SWM site plan and a subdivision and land
development plan, the notification shall occur within the time period
allowed by the MPC,[1] unless an extension for and approval of the SWM site plan,
the subdivision and land development plan, or both, has been granted
by an applicant. If a longer notification period is provided by other
statute, regulation, or ordinance, the applicant shall be so notified
by the municipality and such longer notification period shall apply.
[1]
Editor's Note: See 53 P.S. § 10101 et seq.
D.
For any SWM site plan that proposes to use any BMPs other than green
infrastructure and/or LID practices to achieve the volume and rate
controls required under this chapter, the municipality shall not approve
the SWM site plan unless it determines that green infrastructure and/or
LID practices are not practicable.
E.
If the municipality disapproves the SWM site plan, the municipality
shall state the reasons for the disapproval, including citations to
this chapter, in writing. The municipality may approve the SWM site
plan with conditions and, if so, shall provide the conditions to the
applicant for approval in writing.
A modification to a submitted SWM site plan that involves a
change in SWM BMPs or techniques, or that involves the relocation
or redesign of SWM BMPs, or that is necessary because soil or other
conditions are not as stated on the SWM site plan as determined by
the municipality, shall require a resubmission of the modified SWM
site plan in accordance with this chapter.
A disapproved SWM site plan may be resubmitted, with the revisions
addressing the reasons for the municipality's prior disapproval,
to the municipality in accordance with this article. The applicable
review fee must accompany a resubmission of a disapproved SWM site
plan.
The municipality's approval of a SWM site plan authorizes the regulated activities contained in the SWM site 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 SWM site plan and such shorter term of validity shall be noted, in writing, to applicant as a condition of plan approval; provided, however, that if not so noted, the term of validity shall be five years. Terms of validity shall commence on the date the municipality signs the approved SWM site plan. If an approved SWM site plan is not completed within the term of validity, then the municipality may deem the SWM site plan disapproved and revoke any and all permits. SWM site plans that are considered disapproved by the municipality shall be resubmitted in accordance with § 125-405 of this chapter, and the applicant shall be prohibited from conducting any regulated activity until a newly approved plan is obtained.
A.
All regulated activities shall be conducted, operated and maintained in accordance with the requirements set forth in Articles III, V, and VII of this chapter. When a SWM site plan is required by this chapter, all regulated activities shall be performed in accordance with the requirements of the final approved SWM site plan.
B.
The Township Engineer or other municipal designee shall be provided
access to the site to inspect all phases of the erosion and sediment
control measures and installation of the permanent BMPs and conveyances
at such times as deemed appropriate by the Township Engineer or other
municipal designee. The Township Engineer may require or directly
engage a geotechnical engineer, experienced in the construction of
dams, to perform certain inspections.
C.
Periodic inspections may be made by the Township Engineer or other
designee during construction. A set of design plans approved by the
municipality shall be on file and available for viewing at the site
throughout the duration of the construction activity.
D.
Inspections, including but not limited to a final inspection, of
all constructed BMPs, conveyances, or other stormwater management
facilities and related improvements may be conducted by the Township
Engineer or other designee to confirm compliance with this chapter
and with the final approved SWM site plan prior to the issuance of
any occupancy permit, use permit, or other form of final approval
of the project by the municipality.
E.
Upon completion of construction, every permanent stormwater BMP,
conveyance or other stormwater management facility constructed or
used as part of the regulated activity shall be operated, maintained
and inspected by the landowner, or other designated person, in accordance
with the O&M plan and O&M agreement approved by the municipality.
F.
The municipality or its designee may periodically inspect any permanent stormwater BMP, conveyance or facility for compliance with this chapter, an approved O&M plan, or an approved O&M agreement, per the provisions of Article VIII. The municipality may inspect at any time it has reason to believe a violation exists. The municipality may pursue enforcement for violations consistent with the provisions of Article VIII.
A.
The developer shall be responsible for providing as-built plans (signed
and sealed by a qualified licensed professional) of all BMPs, conveyances,
other stormwater management facilities, and related improvements shown
in the final approved SWM site plan. The as-built plans shall be submitted
in both paper and electronic (PDF) format.
B.
The as-built submission shall include a certification of completion
signed by a qualified professional 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
at the central location of the BMPs shall also be submitted. If any
qualified professional(s) contributed to the construction plans, then
said qualified professional(s) shall sign the completion certificate.
C.
The final as-built plans shall include the following for all BMPs,
conveyances, other stormwater management facilities and related improvements:
(1)
The location, elevations, dimensions, and as-built conditions
of all BMPs, conveyances, other stormwater management facilities,
and related improvements including topographic contours and all typical
details for storm drainage and conveyance systems, stormwater management
facilities and impervious surfaces (existing, proposed, or constructed)
included in the approved SWM site plan; and
(2)
Explanation of any discrepancies or variations from the final
approved SWM site plan, other related approved construction plans,
calculations and specifications (and approved revisions thereto).
D.
The final as-built plans shall include a certification of completion
signed and sealed by a qualified licensed professional verifying that
all permanent BMPs and conveyances have been constructed and are functioning
according to the final approved SWM site plan and related approved
construction plans, calculations and specifications.
E.
All areas of the regulated activity draining to BMPs must be stabilized
prior to submittal of the as-built plans.
F.
After receipt of the as-built plans by the municipality, the municipality
or its designee may review the as-built plans for consistency with
this chapter, the final approved SWM site plan, other related approved
construction plans, and subsequent approved revisions thereto, as
well as actual conditions at the site, and the municipality may conduct
a final inspection.
G.
The as-built plans must be received, reviewed and determined to be
acceptable by the municipality prior to the following, as applicable:
(1)
Closeout of the drainage permit or other closeout of the project
by the municipality;
(2)
Release of the financial security or other performance guarantee;
and
(3)
Dedication of the stormwater management facilities to the municipality,
or conveyance to a homeowners' association or other person responsible
for operation, maintenance and repair.
H.
Final occupancy permit(s) or use permit or other final approval to
use or operate the constructed improvement may not be issued by the
municipality until the final as-built plans have been accepted. If
the final as-built plans are not accepted by the Township Engineer
due to a significant discrepancy from the approved SWM site plan,
the applicant shall be required to submit additional calculations
documenting the as-built stormwater management facilities meet the
requirements of this chapter or shall be required to reconstruct the
stormwater management facilities to comply with the approved SWM site
plan. All remedial measures to correct discrepancies from the approved
SWM site plan shall be at the applicant's cost.
I.
Upon final acceptance of the final as-built plans by the municipality, the applicant shall review and, if required by the municipality, revise and re-record the O&M plan and the O&M agreement to reflect the final as-built conditions and information for each permanent BMP or conveyance, in accordance with the requirements of Article V.
J.
All or portions of the final as-built plans shall be recorded at
the applicant's cost if required by the municipality.
