For any of the activities regulated by this chapter, the preliminary
or final approval of subdivision and/or land development plans, the
issuance of any building or occupancy permit, the commencement of
any earth disturbance or activity may not proceed until the property
owner or applicant or his/her agent has received written approval
of a SWM site plan from the Borough and an approval of an adequate
erosion and sediment (E&S) control plan review from the Borough
or County Conservation District.
A small project SWM site plan shall be required and submitted
to the Borough for approval for small residential regulated activities
creating impervious surface greater than 1,000 square feet up to and
including 5,000 square feet. Refer to Appendix I of this chapter for
an example of a small project SWM site plan. The following requirements
do not apply to small project SWM site plans.
The SWM site plan shall consist of a general description of
the project, including calculations, maps, and plans. A note on the
maps shall refer to the associated computations and E&S control
plan by title and date. The cover sheet of the computations and E&S
control plan shall refer to the associated maps 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.
(2)
General description of proposed SWM techniques to be used for SWM
facilities.
(3)
Complete hydrologic and hydraulic computations for all SWM facilities.
(4)
All reviews and letters of adequacy from the Conservation District
for the erosion and sedimentation plan as required by the Borough,
county or state regulations.
(5)
A general description of proposed nonpoint source pollution controls.
(6)
The SWM site plan application.
B.
Plans. SWM site plan shall provide the following information:
(1)
The overall stormwater management concept for the project.
(2)
A determination of natural site conditions and stormwater management
needs. This shall include, but not be limited to:
(a)
Site features:
[1]
The location of the project relative to highways, municipal
boundaries or other identifiable landmarks.
[2]
The locations of all existing and proposed utilities, sanitary
sewers, and water lines on site and to within 50 feet of property
lines.
[3]
Proposed structures, roads, paved areas, and buildings.
[4]
The total tract boundary and size with distances marked to the
nearest foot and bearings to the nearest degree.
[5]
Plan and profile drawings of all SWM BMP's, including drainage
structures, pipes, open channels, and swales. At a minimum, this should
include pre- and post-drainage area maps, an overall post construction
stormwater management plan, stormwater details sheets, and landscape
plans (if proposing bioretention facilities, low impact development,
bioretention, or vegetative basins).
[6]
The locations and minimum setback distances of existing and
proposed on-lot wastewater facilities and water supply wells.
[7]
The location of all erosion and sediment control facilities.
[8]
The location of proposed septic tank infiltration areas and
wells in cases where groundwater recharge measures, such as seepage
pits, beds or trenches, are proposed.
(b)
Natural site conditions:
[1]
An existing resource and site analysis map (ERSAM) showing environmentally
sensitive areas, including, but not limited to:
[a]
Steep slopes;
[b]
Ponds;
[c]
Lakes;
[d]
Streams;
[e]
Wetlands;
[f]
Hydric soils;
[g]
Hydrologic soil groups A and B;
[h]
Vernal pools;
[i]
Stream buffers;
[j]
Open channels;
[k]
Existing recharge areas; and
[l]
Floodplains.
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The area of each of these sensitive areas shall be calculated and should be consistent with the runoff volume calculation § 338-11B(3)(a).
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[2]
A detailed site evaluation for projects proposed in areas of
frequent flooding, karst topography, and other environmentally sensitive
areas, such as brownfields and source water protection areas.
[3]
Existing and proposed contour lines (two feet).
[4]
The total extent of the drainage area upstream from the site
and all downgradient receiving channels, swales and waters to which
stormwater runoff or drainage will be discharged.
(c)
Stormwater runoff design computations and documentation as specified in this chapter, or as otherwise necessary to demonstrate that the maximum practicable measures have been taken to meet the requirements of this chapter, including the recommendations and general requirements in § 338-9.
(d)
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.
(3)
The format of the plan shall include the following:
(a)
The expected project time schedule.
(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 date of submission.
(d)
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.
(e)
A North arrow.
(f)
An access easement around all stormwater management facilities
is required that would provide ingress to and egress from a public
right-of-way. The size of the easement shall commensurate with the
maintenance and access requirements determined in the design of the
BMP.
(g)
A key map showing all existing man-made features beyond the
property boundary that would be affected by the project.
(h)
A note on the plan indicating the location and responsibility
for maintenance of stormwater management facilities. All facilities
shall meet the performance standards and design criteria specified
in this chapter.
(i)
The following signature block for the Design Engineer: "I, (Design
Engineer), on this date (date of signature), hereby certify that the
SWM Site Plan meets all design standards and criteria of The Neshaminy
Creek Watershed Act 167 Stormwater Management Ordinance or Plan."
(j)
A statement, signed by the applicant, acknowledging that any
revision to the approved SWM site plan must be approved by the Borough
and that a revised E&S plan must be submitted to the Conservation
District.
(4)
A soil erosion and sediment control plan, where applicable, as prepared
for and submitted to the approval authority.
(5)
The SWM site plan shall include an operations & maintenance (O&M)
plan for all existing and proposed physical stormwater management
facilities, as well as schedules and costs for O&M activities.
This plan shall address long-term ownership and responsibilities for
O&M.
The Borough requires submission of a complete SWM site plan,
as specified in this chapter.
B.
Two copies of the SWM site plan shall be submitted to the Borough.
The Borough will direct the applicant to submit additional copies
to other appropriate agencies as necessary.
C.
Any submissions to the agencies listed above that are found to be
incomplete shall not be accepted for review and shall be returned
to the applicant with a notification in writing of the specific manner
in which the submission is incomplete.
D.
Additional copies shall be submitted as requested by the Borough
or PADEP.
A.
The SWM site plan shall be reviewed by a qualified professional on
behalf of the Borough for consistency with the provisions of this
chapter. After review, the qualified professional shall provide a
written recommendation for the Borough to approve or disapprove the
SWM site plan. If it is recommended to disapprove the SWM site plan,
the qualified professional shall state the reasons for the disapproval
in writing. The qualified professional also may recommend approval
of the SWM site plan with conditions and, if so, shall provide the
acceptable conditions for approval in writing. The SWM site plan review
and recommendations shall be completed within the time allowed by
the Municipalities Planning Code[1] for reviewing subdivision plans.
[1]
Editor's Note: See 53 P.S. § 10101 et seq.
B.
The Borough will notify the applicant in writing within 45 days whether
the SWM site plan is approved or disapproved. If the SWM site plan
involves a subdivision and land development plan, the notification
period is 90 days. If a longer notification period is provided by
other statute, regulation, or ordinance, the applicant will be so
notified by the Borough. If the Borough disapproves the SWM site plan,
the Borough shall cite the reasons for disapproval 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 Borough shall require a resubmission of the modified SWM site
plan in accordance with this article.
A disapproved SWM site plan may be resubmitted, with the revisions
addressing the Borough's concerns, to the Borough in accordance with
this article.
The Borough's approval of an 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 Borough may specify a term of validity shorter than five years in the approval for any specific SWM site plan. Terms of validity shall commence on the date the Borough signs the approval for an SWM site plan. If an approved SWM site plan is not completed according to this section within the term of validity, the Borough may consider the SWM site plan disapproved and may revoke any and all permits. SWM site plans that are considered disapproved by the Borough shall be resubmitted in accordance with § 338-27 of this chapter.
