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 municipality and an approval of an adequate
erosion and sediment (E&S) control plan review from the municipality
or County Conservation District.
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 municipality
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) General description of the project, including plan contents described in §
148-22B.
(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 Doylestown Township,
county or state regulations.
(5) A general description of proposed nonpoint source pollution controls.
(6) The SWM site plan application and completed fee schedule form and
associated fee for all regulated activities not already paying fees
under the SALDO or other municipal regulations. (Ordinance Appendix
C-1).
(7) The SWM site plan checklist (Ordinance Appendix C-2).
(8) Appropriate sections from the municipality's Subdivision and Land
Development Ordinance, and other applicable local ordinances, shall be followed
in preparing the SWM site plan.
B. Plans. The 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 BMPs, 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.
[9]
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 §
148-12.
[10] Expected project time schedule.
[11] A soil erosion and sediment control plan, where
applicable, as prepared for and submitted to the approval authority.
[12] A justification must be included in the SWM site
plan if BMPs other than green infrastructure methods and LID practices
are proposed to achieve the volume, rate and water quality controls
under this chapter.
(b)
Natural site conditions.
[1]
Map and calculation of environmentally sensitive areas.
[a] An Existing Resource and Site Analysis Map (ERSAM)
showing environmentally sensitive areas, including, but not limited
to:
[vii] Hydrologic Soil Groups A and B;
[xi] Existing recharge areas; and
[b] The area of each of these sensitive areas shall be calculated and should be consistent with the runoff volume calculation in §
148-16C(1).
[i] 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.
[ii] Existing and proposed contour lines (two feet).
[iii] The total extent of the drainage area upstream
from the site and all down gradient 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 §
148-14.
[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.
(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.
(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 be 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."
"Doylestown Township on this date _____, has reviewed and hereby
certifies that the SWM site plan meets all design standards and criteria
of the Municipal Ordinance No._______"
(j)
A statement, signed by the applicant, acknowledging that any
revision to the approved SWM site plan must be approved by the municipality
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 and 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 municipality requires submission of a complete SWM site
plan, as specified in this chapter.
A. Proof of application or documentation of required permit(s) or approvals
for the programs listed below shall be part of the plan:
(1) NPDES permit for stormwater discharges from construction activities.
(2) Any other permit under applicable state or federal regulations.
B. Six copies of the SWM site plan shall be submitted to the following
agencies:
(1) Two copies to the municipality accompanied by the requisite municipal
review fee, as specified in this chapter.
(2) Two copies to the County Conservation District.
(3) One copy to the Municipal Engineer (where applicable).
(4) One copy to the County Planning Commission/Department if the regulated
activity is also required to submit a subdivision and/or land development
plan to the County Planning Commission in accordance with the Pennsylvania
Municipal Planning Code.
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 municipality
or PADEP.
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 article.
A disapproved SWM site plan may be resubmitted, with the revisions
addressing the municipality's concerns, 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 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 municipality 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 municipality signs the approval for an SWM site plan. If an approved SWM site plan is not completed according to §
148-27 within the term of validity, the municipality may consider the SWM site plan disapproved and may revoke any and all permits. SWM site plans that are considered disapproved by the municipality shall be resubmitted in accordance with §
148-26 of this chapter.