Although not a requirement of this chapter, prior to proceeding
with SWM site plan preparation and submission, the applicant is encouraged
to request a preapplication meeting with the Borough's Engineer
and a staff member of the York County Conservation District to discuss
the plan concept and responsibility for submission of required documents
and information. Appropriate sections of the Borough's Subdivision
and Land Development Ordinance, and other applicable ordinances of the Borough regarding subdivision and land development plan preparation and applicable plan requirements, shall be followed in preparing all SWM site plans, regardless of whether or not a SWM site plan involves a subdivision and/or land development plan. The Borough 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 Borough may either disapprove the submission, or, in the case of minor deficiencies, the Borough may accept the submission of a revised SWM site plan as noted in §
200-24 of this chapter. The following items shall be included in the SWM site plan:
A. Provisions for permanent access and/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 Subsection
C(9), below.
B. The following signature blocks for the Borough and design engineer:
"(Municipal Engineer), on this date (date of signature), has reviewed the SWM site plan and
finds it to be consistent with the design standards and criteria of
the Jacobus Borough Stormwater Management Ordinance, Ordinance No.
(_____)."
"(Design engineer), on this date (date of signature), hereby certifies that the SWM site
plan meets all design standards and criteria of the Jacobus Borough
Stormwater Management Ordinance, Ordinance No. (_____)."
C. If not required by the Municipal Subdivision and Land Development Ordinance, as specified in §
200-21A of this chapter, the SWM site plan shall also provide the following information where applicable:
(1) The overall stormwater management concept for the project, including
any additional information required for a post-construction stormwater
management plan (PCSWMP) as applicable.
(2) A determination of site conditions in accordance with the BMP Manual.
A detailed site evaluation shall be completed for projects proposed
in areas of carbonate geology or karst topography, as well as for
other environmentally sensitive areas, whether natural or man-made,
including but not limited to floodplains, streams, lakes, ponds, hydric
soils, wetlands, brownfields and wellhead protection zones.
(3) 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 §
200-14.
(4) Expected project time schedule.
(5) An E & S plan in accordance with the following:
(a)
Earth disturbance, zero to 5,000 square feet: Implement erosion
and sediment control measures on site; a written erosion and sediment
control plan and York County Conservation District approval is not
required unless required by state and/or federal permit(s) or deemed
necessary by the Borough. If earth disturbance is in a high-quality
or exceptional-value watershed, then a written erosion and sediment
control plan and YCCD approval is required.
(b)
Earth disturbance, 5,001 square feet to less than one acre:
A written erosion and sediment control plan and implementation of
the plan on site is required. YCCD approval may be required by the
Borough or state and/or federal permit(s). If earth disturbance is
in a high-quality or exceptional-value watershed, then YCCD approval
is required.
(c)
Earth disturbance, one acre or greater: A written erosion and
sediment control plan, YCCD approval and implementation of the plan
on site is required.
(d)
In addition, under 25 Pa. Code Chapter 92, an individual or
general, as applicable, DEP "NPDES Construction Activities" permit
is required for regulated earth disturbance activities of one acre
or greater.
(6) 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.
(7) Plan and profile drawings of all SWM BMPs, including but not limited
to drainage structures, pipes, open channels, and swales.
(8) The SWM site plan shall show the locations of existing and proposed
on-lot wastewater facilities and water supply wells.
(9) The SWM site plan shall include an operation and maintenance (O &
M) Plan for all existing and proposed physical stormwater management
facilities. This plan shall address long-term ownership and responsibilities
for O & M as well as schedules and costs for O & M activities.
This O & M plan may be part of the SWM site plan or may be a separate
recorded document.
(10)
A description of permanent stormwater management techniques,
including the construction specifications of the materials to be used
for stormwater management facilities.
(11)
A notarized signature of the owner of the parcel for which the
SWM site plan is proposed.
(12)
Existing and proposed land uses.
(13)
The location of the proposed regulated activity relative to
streets, municipal boundaries, and other significant man-made features.
(14)
Significant physical features and associated boundary limits,
including flood hazard areas, sinkholes, existing drainage courses,
and areas of natural vegetation.
(15)
The location of existing and proposed utilities, stormwater
facilities, sanitary sewers, and waterlines on the parcel and within
50 feet of property lines.
(16)
Proposed changes to the land surface and vegetative cover, and
the type and amount of existing and proposed impervious area.
(17)
Existing and proposed features, such as structures, buildings,
streets, driveways, access drives, and parking areas.
(18)
Contour intervals of two feet or less. Dependent upon site conditions,
alternative contour intervals proposed by an applicant or his designee
may be accepted by the Borough.
(19)
The name of the development, the name and address of the owner
of the property, and the name and address of the individual or firm
preparing the plan. Also to be included are the name, address, signature
and seal of any registered surveyor (attesting the accuracy of the
boundary survey), professional engineer, landscape architect, or professional
geologist (for geomorphological assessments) contributing to and/or
with a responsibility for any aspect of the plan where applicable.
(20)
Preferred graphic and written scale of one inch equals no more
than 50 feet. Dependent upon site conditions, an alternative scale
proposed by the applicant or his designee may be accepted by the Borough.
(22)
A map showing all existing man-made features beyond the subject
parcel's boundary lines that will be affected by the proposed
regulated activities.
(23)
Horizontal and vertical cross sections of all open channels,
including hydraulic capacity.
(24)
A note on the plan indicating the location, and responsibility
for maintenance of, SWM facilities and/or easements that would be
located on adjoining properties as a result of proposed regulated
activities, and the location of such facilities and/or easements.
(25)
A hydrogeologic assessment of the effects of stormwater runoff
on sinkholes where present.
(26)
The effect of the proposed regulated activity in terms of runoff
volumes and peak flows on adjacent properties and/or any existing
municipal stormwater collection system that may receive runoff from
the project site.
(28)
Infiltration testing performed in accordance with the BMP Manual
shall be completed and the test results provided for any proposed
infiltration BMPs.
(29)
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.
D. Simplified SWM site plan.
(1) The simplified SWM site plan shall require a drawing showing:
(a)
The location and dimensions of the proposed new impervious surface,
property lines, significant natural and man-made features within the
project site.
(b)
The approximate location and dimensions of all other impervious
surfaces within the project site identifying those placed after the
date of the enactment of this chapter.
(c)
The location of all wells and sewage disposal systems located
within the project site.
(d)
The direction of stormwater flow from the existing impervious
surfaces within the project site. The direction of stormwater flow
from the proposed impervious surfaces within the project site. The
general flow patterns across the project site.
(2) The simplified SWM site plan shall require a proposal to manage the
stormwater flow from the proposed impervious surfaces. The proposal
may involve:
(a)
The maintenance of a pervious flow area constructed consistent
with the requirements of a DIA as set forth in Appendix B of this
chapter, or, if the requirements of Appendix B cannot be met, then
an equivalent DIA may be authorized by the Borough.
(b)
The construction and maintenance of:
[1]
Stormwater pits to receive roof water. If the proposed structure exceeds 2,500 square feet in size, stormwater pit(s) shall be sized after the analysis of probe hole(s) and infiltration tests to establish the size of the pit(s) necessary to achieve compliance with this chapter. If the proposed structure is less than 2,500 square feet, the Borough may require probe hole(s) and infiltration tests on a case-by-case basis. Tests shall be performed by the Borough designee or authorized agent at the depth and location of the proposed pits. Infiltration tests shall be performed per §
200-21C(28); or
[2]
A detention basin approved by the Borough's Engineer as designed and sized to manage proposed increases in stormwater flow from the project site brought about by the proposed impervious surface. If the detention basin is being utilized for infiltration, prior to approval, there must be analysis of probe hole(s) and infiltration tests to establish the size of basin(s) necessary to achieve compliance with this chapter. Tests shall be performed by the Borough's designee or authorized agent at the depth and location of the proposed basin. Infiltration tests shall be performed per §
200-21C(28); or
[3]
Any other proposal approved by the Borough Engineer or the Borough
Enforcement Officer as sufficient to manage the increase in stormwater
runoff brought about by the regulated activity.
A revision to a previously submitted or approved SWM site plan
that involves a change in SWM BMPs, stormwater management facilities,
or changes in analytical 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 revised SWM site
plan in accordance with this article, including applicable fees. For
NPDES permitted sites, any revised SWM site plan shall also be resubmitted
to the York County Conservation District for review. In the case of
a SWM site plan which contains minor deficiencies, such as a missing
label, omission of a required note or minor construction detail, as
determined by the Borough, the Borough may accept a resubmission of
such SWM site plan without the requirement of a review fee, or for
a lesser fee as provided for in the Borough's fee schedule.
A disapproved SWM site plan may be resubmitted, with the revisions addressing the Borough's concerns as stated regarding the original submission, to the Borough in accordance with this Article
IV. The applicable review fee must accompany the submission of a revised SWM site plan, unless such fee is waived by the Borough. (See §
200-24.)
The applicant shall provide financial security to the Borough
prior to approval of a SWM site plan to guarantee installation and
construction of all stormwater management facilities depicted on the
approved SWM site plan (including associated erosion and sedimentation
facilities) in the amount of 110% of the total estimated construction
cost. Financial security shall be provided in a form that is acceptable
to the Borough. The financial security shall comply with the requirements
of Section 509 of the Pennsylvania Municipalities Planning Code, except that the financial security shall only be released upon submittal and approval of an as-built plan and professional certification as required by §
200-27. All remedies available to the Borough pursuant to Sections 509, 510, and 511 of the Pennsylvania Municipalities Planning Code shall be available pursuant to this chapter.