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, or the commencement of any earth disturbance activity may not proceed until the property owner, applicant, or his/her agent has received written approval of a SWM site plan from the municipality and an adequate erosion and sediment control plan review by the Conservation District unless the project qualifies for an exemption in § 245-6.
The SWM site plan shall consist of a general description of the project including sequencing items described in § 245-17, calculations, maps, and plans. A note on the maps 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 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, when applicable:
A.
General.
(2)
General description of proposed permanent stormwater management techniques,
including construction specifications of the materials to be used
for stormwater management facilities.
(3)
Complete hydrologic, hydraulic, and structural computations for all
stormwater management facilities.
(4)
An erosion and sediment control plan, including all reviews and letters
of adequacy from the Conservation District.
(5)
A general description of proposed nonpoint source pollution controls.
(6)
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.
(7)
The SWM site plan application and completed fee schedule form and
associated fee (ordinance Appendix C-1).
(8)
The SWM site plan checklist (Appendix C-2).
B.
Maps or plan sheets. Map(s) or plan sheets of the project area shall
be submitted on twenty-four-inch by thirty-six-inch sheets and/or
shall be prepared in a form that meets the requirements for recording
at the offices of the Recorder of Deeds of Delaware County. If the
SALDO has more stringent criteria than this chapter, then the more
stringent criteria shall apply. The contents of the map(s) shall include,
but not be limited to:
(1)
The location of the project relative to highways, municipal boundaries,
or other identifiable landmarks.
(2)
Existing contours at intervals of two feet.
(3)
Existing streams, lakes, ponds, or other waters of the commonwealth
within the project area.
(4)
Other physical features, including flood hazard boundaries, stream
buffers, existing drainage courses, areas of natural vegetation to
be preserved, and the total extent of the upstream area draining through
the site.
(5)
The locations of all existing and proposed utilities, sanitary sewers,
and water lines within 50 feet of property lines.
(6)
An overlay showing soil names and boundaries.
(7)
Limits of earth disturbance, including the type and amount of impervious
area that would be added.
(8)
Proposed structures, roads, paved areas, and buildings.
(9)
Final contours at intervals of two feet.
(10)
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.
(11)
The date of submission.
(12)
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.
(13)
A north arrow.
(14)
The total tract boundary and size with distances marked to the
nearest foot and bearings to the nearest degree.
(15)
Existing and proposed land use(s).
(16)
A key map showing all existing man-made features beyond the
property boundary that would be affected by the project.
(17)
Location of all open channels.
(18)
Overland drainage patterns and swales.
(19)
A fifteen-foot-wide access easement around all stormwater management
facilities that would provide ingress to and egress from a public
right-of-way.
(20)
A twenty-foot-wide (10 feet either side of the pipe) for all
sanitary sewer mains.
(21)
The location of all erosion and sediment control facilities.
(22)
A note on the plan indicating the location and responsibility
for maintenance of stormwater management facilities that would be
located off site. All off-site facilities shall meet the performance
standards and design criteria specified in this chapter.
(23)
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 erosion and sediment control plan must be submitted
to the Conservation District for a determination of adequacy.
(24)
The following signature block signed and sealed by the qualified
licensed professional engineer responsible for the preparation of
the SWM site plan:
"I, (licensed professional engineer), on this date (date of
signature), hereby certify that the SWM site plan meets all design
standards and criteria of the Radnor Township Stormwater Management
Ordinance."
(25)
The following signature block for the municipality:
"On behalf of Radnor Township (Municipal official or designee),
on this date (date of signature), has reviewed and hereby certifies
to the best of my knowledge that the SWM Site Plan meets all design
standards and criteria of the Radnor Township Stormwater Management
Ordinance."
C.
Supplemental information to be submitted to the municipality:
(1)
A written description of the following information shall be submitted
by the applicant and shall include:
(2)
An erosion and sediment control plan.
(3)
A description of the effect of the project (in terms of runoff volumes
and peak flows) on adjacent properties and on any existing municipal
stormwater collection system that may receive runoff from the project
site.
(4)
A Declaration of Adequacy and Highway Occupancy Permit from the Pennsylvania
Department of Transportation (PennDOT) District office when utilization
of a PennDOT storm drainage system is proposed.
D.
Stormwater management facilities.
(1)
All stormwater management facilities must be located on a plan and
described in detail.
(2)
The locations of existing and proposed septic tank infiltration areas
and wells must be shown.
(3)
All calculations, assumptions, loading ratios (guidelines presented
in the PA BMP Manual), and criteria used in the design of the stormwater
management facilities must be shown.
The municipality shall require receipt 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, if applicable:
B.
The plan shall be coordinated with the state and federal permit process
and the municipal SALDO review process. The process implementing the
provisions in this chapter is illustrated in Appendices D-1 and D-2.
C.
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.
E.
Five copies of the SWM site plan shall be submitted by the applicant
for review in accordance with established criteria and procedures:
F.
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.
A.
SWM plans shall be submitted to the municipality for review by the
Municipal Engineer for consistency with this chapter and the respective
Act 167 Stormwater Management Plan. Any plan found incomplete may
not be accepted for review and may be returned to the applicant. The
Municipal Engineer will review the SWM site plan for any subdivision
or land development against the municipal SALDO provisions not otherwise
superseded by this chapter.
B.
The applicant shall respond to the Conservation District comments
on the SWM site plan prior to being considered for final approval
by the municipality.
C.
For activities regulated by this chapter (§ 245-5), the Municipal Engineer will notify the applicant and the municipality in writing, with a copy to the Building Permit Officer, within 30 calendar days, whether the SWM site plan is consistent with the stormwater management plan.
(1)
If the Municipal Engineer determines that the SWM site plan is consistent
with the stormwater management ordinance, the Municipal Engineer will
forward a letter of consistency to the municipality, who will then
forward a copy to the applicant.
(2)
If the Municipal Engineer determines that the SWM site plan is inconsistent
or noncompliant with the stormwater management ordinance, the Municipal
Engineer will forward a letter to the municipality, with a copy to
the applicant citing the reason(s) and specific ordinance sections
for the inconsistency or noncompliance. Inconsistency or noncompliance
may be due to inadequate information to make a reasonable judgment
as to compliance with the stormwater management plan. Any SWM site
plans that are inconsistent or noncompliant may be revised by the
applicant and resubmitted when consistent with this chapter.
D.
For regulated activities under this chapter that require an NPDES
permit application, the applicant shall forward a copy of the Municipal
Engineer's letter stating that the SWM site plan is consistent
with the stormwater management ordinance to the Conservation District.
PADEP and the Conservation District may consider the Municipal Engineer's
review comments in determining whether to issue a permit.
E.
The municipality will not grant preliminary or final approval to
any subdivision or land development for regulated activities specified
in this chapter if the SWM site plan has been found by the Municipal
Engineer to be inconsistent with the stormwater management ordinance.
All required permits from PADEP must be obtained prior to approval
of any subdivision or land development.
F.
No building permits for any regulated activity specified in this
chapter will be approved by the municipality if the SWM site plan
has been found to be inconsistent with the stormwater management ordinance,
as determined by the Municipal Engineer and Conservation District,
or without considering the comments of the Municipal Engineer and
Conservation District. All required permits from PADEP must be obtained
prior to issuance of a building permit.
G.
The applicant shall be responsible for completing record drawings
of all stormwater management facilities included in the approved SWM
site plan. The record drawings and an explanation of any discrepancies
with the design plans shall be submitted to the Municipal Engineer
for final approval. In no case will the municipality approve the record
drawings until the municipality receives a copy of an approved declaration
of adequacy and/or highway occupancy permit from the PennDOT District
office, NPDES permit, and any other applicable permits or approvals
from PADEP or the Conservation District. The above permits and approvals
must be based on the record drawings.
H.
The municipality's approval of a SWM site plan shall be valid for a period not to exceed three years commencing on the date that the municipality signs the approved SWM site plan. If stormwater management facilities included in the approved SWM site plan have not been constructed, or if constructed, record drawings of these facilities have not been approved within this five-year time period, then the municipality may consider the SWM site plan inconsistent or noncompliant and may revoke any and all permits. SWM site plans that are determined to be inconsistent or noncompliant by the municipality shall be resubmitted in accordance with § 245-30 of this chapter.
I.
For any SWM site plan that proposes to use any BMPs other than green
infrastructure and LID practices to achieve the volume and rate controls
required under this chapter, the municipality will not approve the
SWM site plan unless it determines that green infrastructure and LID
practices are not practicable.
A.
A revision to a submitted SWM site plan under review by the municipality for a development site that involves the following shall require a resubmission to the municipality of a revised SWM site plan consistent with § 245-27 of this chapter and be subject to review as specified in § 245-28 of this chapter:
B.
A revision to an already approved or inconsistent or noncompliant
SWM site plan shall be submitted to the municipality, accompanied
by the applicable municipal review and inspection fee. A revision
to a SWM site plan for which a formal action has not been taken by
the municipality shall be submitted to the municipality accompanied
by the applicable municipal review and inspection fee.
An inconsistent or noncompliant SWM site plan may be resubmitted with the revisions addressing the Municipal Engineer's concerns documented in writing. It must be addressed to the municipality in accordance with § 245-27 of this chapter, distributed accordingly, and be subject to review as specified in § 245-28 of this chapter. The applicable municipal review and inspection fee must accompany a resubmission of an inconsistent or noncompliant SWM site plan.
