A.
The SWM site plan shall consist of a narrative and all applicable
calculations, maps, plans and supplemental information necessary to
demonstrate compliance with this chapter.
B.
All landowners of land included in the SWM site plan shall be required
to execute all applications and final documents.
C.
All SWM site plans and calculations shall be prepared and sealed
by a qualified person. All stormwater designs, assumptions, methods
and data must be presented in a manner acceptable to the Borough Engineer.
D.
Where the regulated activity constitutes subdivision or land development as hereinabove defined, the SWM site plan shall be submitted with and form an integral part of the plans required under the Chapter 325, Subdivision and Land Development.
E.
All stormwater management materials shall be submitted in a format
that is clear, concise, legible, neat and well organized.
A.
The plan shall be clearly and legibly drawn.
B.
If the plan is prepared in two or more drawing sheets, a key map
showing the location of the sheets and a match line shall be placed
on each sheet.
C.
Each sheet shall be numbered to show the relationship to the total
number of sheets in the plan (e.g., Sheet 1 of 5).
D.
Drawings or maps of the project area shall be drawn at one inch equals
50 feet or larger scale (i.e, one inch equals 40 feet, one inch equals
30 feet, etc.) and shall be submitted on twenty-four-inch-by-thirty-six-inch
sheets. The drainage area maps can be submitted at any scale, provided
the maps are legible.
E.
SWM site plans shall be prepared in a form that meets the requirements
for recording for the office of the Recorder of Deeds of Lancaster
County.
F.
The total development site boundary and size with distances marked
to the nearest foot and bearings to the nearest degree shall be clearly
indicated on the plan.
The following items shall be included in the SWM site plan:
A.
The date of the SWM site plan and latest revision, graphic scale,
written scale and North arrow.
B.
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.
C.
The file or project number assigned by the firm that prepared the
plan.
D.
Certificate for approval by the Borough Council or designee. See
Appendix A, Certificate for Approval By Borough Council or designee.[1]
[1]
Editor's Note: Said appendix is included as an attachment to this chapter.
E.
Certificate, signature and seal of a qualified professional preparing
the stormwater management site plan. See Appendix A, Storm Water Management
Designer Certification.[2]
[2]
Editor's Note: Said appendix is included as an attachment to this chapter.
F.
The following signature block for the landowner, acknowledging that
the SWM facilities are fixtures that cannot be altered or removed
without prior approval by the Borough. "I _____, 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 Borough Council."
G.
A note on the plan referencing a recorded stormwater operation and
maintenance (O&M) agreement that indicates the location and responsibility
for maintenance of the on-site and off-site facilities.
H.
A note informing the owner that the Borough shall have the right
of entry for the purposes of inspecting all stormwater conveyance,
treatment, or storage facilities.
I.
A location map, drawn to a scale of a minimum of one inch equals
2,000 feet, relating the plan to municipal boundaries, at least two
intersections of road center line or other identifiable landmarks.
J.
Existing features. The following features shall be shown on all stormwater
management site plans and shall be shown on a separate sheet titled
"Existing Conditions." No proposed features shall be included on this
sheet.
(1)
In areas of disturbance, contours at intervals of one or two feet.
In areas of steep slopes (greater than 15%) and areas undisturbed,
five-foot contour intervals may be used.
(2)
The locations of all existing utilities (including on-lot disposal
systems and wells), sanitary sewers, and waterlines and associated
easements.
(3)
An overlay showing soil names and boundaries.
(4)
Names of all adjacent landowners, property boundaries and locations
and dimensions of easements as indicated by a boundary survey.
(5)
Physical features including railroads, streets, flood hazard boundaries,
wetlands, sinkholes, streams, lakes, ponds and other water bodies,
existing drainage courses, karst features, areas of native vegetation
including trees greater than six inches diameter at breast height,
woodlands, other environmentally sensitive areas and the total extent
of the upstream area draining through the development site.
K.
Proposed features.
(1)
Changes to the land surface and vegetative cover, including final
proposed contours at intervals of one or two feet in areas of disturbance.
In areas of steep slopes (greater than 15%) and areas undisturbed,
five-foot contour intervals may be used.
(2)
Proposed structures, roads, paved areas, buildings and other impervious
and semi-impervious areas.
(3)
The location of any proposed on-lot disposal systems, replacement
drainfield easements, and water supply wells.
(4)
A note indicating existing and proposed land use(s).
(5)
Plan and profile drawings of all proposed SWM facilities, including
BMPs, drainage structures, pipes, open channels, and swales. This
information shall be of the quality required for the construction
of all facilities.
(6)
Where pervious pavement is to be installed, pavement material and
construction specifications shall be included.
(7)
The location of all existing and proposed easements, including drainage
easements, access easements and riparian corridor easements.
L.
The type and location of all E&S control facilities.
M.
SWM facilities located within or affecting the floodplain of any watercourse shall comply with the requirements of the floodplain regulations provided in Chapter 380, Zoning, or any future ordinances regulating construction or development within areas of the Borough subject to flooding.
N.
The minimum floor elevations for all structures that would be affected
by a basin, other temporary impoundments, or open conveyance systems
where ponding may occur shall be two feet above the one-hundred-year
water surface. If basement or underground facilities are proposed,
detailed calculations addressing the effects of the stormwater ponding
on the structure and waterproofing and/or floodproofing design information
shall be provided for review and approval.
O.
No outlet structure from a stormwater management facility, or swale,
shall discharge directly onto a Borough or state roadway.
A.
General description of the development site, including a description
of existing natural and hydrologic features and any environmentally
sensitive areas.
B.
General description of the overall SWM concept for the project, including
a description of permanent SWM techniques, nonstructural BMPs to be
employed and construction specifications of the materials to be used
for structural SWM facilities. The narrative shall include a description
of any treatment trains and how the facilities are meant to function
with each other to manage stormwater runoff.
C.
A summary narrative stating the effect of the project (in terms of
runoff volumes, water quality and peak flows) on adjacent properties
and on any existing municipal SWM facilities that may receive runoff
from the development site.
D.
Complete hydrologic, hydraulic, and structural computations for all
SWM facilities in a format suitable to the Borough Engineer.
E.
Project inspection schedule for all BMPs.
F.
A justification
shall be included if BMPs other than green infrastructure methods
and LID practices are proposed to achieve the volume, rate, and water
quality controls required by this chapter.
[Added 9-27-2022 by Ord. No. 2022-04]
A.
In areas of carbonate geology, a detailed geologic evaluation prepared
by a registered professional geologist (PG) or other qualified person
must be submitted as part of the SWM site plan. The report shall include,
but not be limited to the following:
B.
A NPDES and E&S plan, including all approvals, as required by
Chapter 102, shall be provided to the Borough prior to unconditional
SWM site plan approval.
C.
For any activities that require a DEP joint permit application and are regulated under Chapter 105 or Chapter 106, or require any other permit under applicable state or federal regulations, the permit(s) shall be part of the SWM site plan and must be obtained prior to unconditional SWM site plan approval.
D.
For any activities that require a Penn DOT Highway Occupancy Permit,
the permit(s) shall be part of the SWM site plan and must be obtained
prior to unconditional SWM site plan approval. If PennDOT requires
that the Borough be the permittee for such drainage facilities, the
applicant shall enter into an agreement, in recordable form, assuming
all of the obligations which PennDOT may place upon the Borough as
permittee, including, but not limited to, long-term maintenance of
any such facilities, compliance with all conditions contained in the
permit, and indemnification of the Borough for any costs or penalties
which PennDOT may seek to impose on the Borough. The Borough shall
have no obligation to make any applications to PennDOT.
E.
An operation and maintenance (O&M) plan shall be included that addresses the requirements of § 315-63.
F.
All SWM facilities must be located on a map and described in detail.
The content of the map(s) and computations shall include, but not
be limited to:
(1)
All calculations, assumptions and criteria used for the design of
the SWM facilities must be included for both predevelopment and post-development
conditions. If multiple facilities are used in conjunction with each
other, such as infiltration BMPs with vegetation-based management
practices, a summary narrative shall be included which describes the
construction sequence and how the facilities are meant to function
with each other to manage stormwater runoff.
(2)
When groundwater recharge methods such as seepage pits, beds or trenches
are used, the locations of existing and proposed septic tank infiltration
areas and wells must be shown. A minimum fifty-foot separation from
on-lot disposal system (OLDS) infiltration areas is required. Infiltration
rates shall be based upon perk and probe tests conducted at the site
of the proposed facility.
(3)
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.
