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 Township Board of Supervisors or
designee. See Appendix 1, Certificate for Approval By East Hempfield
Township Board of Supervisors or Designee.
E. Certificate, signature and seal of a qualified professional preparing
the stormwater management site plan. See Appendix 1, Stormwater Management
Designer Certification.
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 Township. "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 East Hempfield Township."
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 municipality 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 centerline 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 water lines 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 flood hazard boundaries, wetlands, sinkholes,
streams, lakes, ponds and other waterbodies, 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.
(6) All existing man-made features within 200 feet of the development
site boundary.
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.
(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.
(8) A planting plan shall be provided for all vegetated BMPs.
L. The location of all E&S control facilities.
M. Stormwater management facilities located within or affecting the
floodplain of any watercourse shall comply with the requirements of
the floodplain regulations provided in the Zoning Ordinance or any
future ordinances regulating construction or development within areas
of the Township subject to flooding.
N. The minimum habitable 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 100-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 Township or state roadway.
P. A note indicating that all items needing inspection shall be coordinated
by the owner and/or contractor. All requests for required inspections
by the contractor are to be deemed as approved requests on behalf
of the owner.
Q. The actual existing and proposed lot coverage in square feet, in
addition to the percentages, should clearly be shown on the data provided
on the plan. This should correlate to the design information in the
required post construction stormwater management report to be used
as a benchmark for all future impervious surface changes.
R. When applicable, notation should be added to the plan stating that
"all impervious surfaces to be removed are to be removed full depth,
including any stone base" so as to receive credit as a post development
condition pervious surface in the stormwater management design. A
statement, signed by the owner and any successor, acknowledging that
the impervious surfaces to be removed full depth function as the SWM
facilities for this project and cannot be added back or altered or
increased unless a revised plan is approved by the municipality must
be provided.
S. A note indicating construction site operators are required to control
waste at the construction site that may cause adverse impacts to water
quality. These wastes can include discarded building materials, concrete
washout, chemicals, litter, and sanitary waste.
T. PCSM Title Blocks outlining each individual post-construction stormwater
management BMP and/or facility per Appendix 8.
Applicants are encouraged to schedule a pre-application meeting
to review the overall stormwater management concept with Municipal
staff/engineer. The pre-application meeting is not mandatory and shall
not constitute formal filing of a plan with the municipality. The
Township has the right to seek reimbursement for all pre-application
professional services incurred. Topics discussed may include the following:
A. Available geological maps, plans and other available data.
B. Findings of the site analysis including identification of any environmentally
sensitive areas, wellhead protection areas, riparian corridors, hydrologic
soil groups, existing natural drainageways, karst features, areas
conducive to infiltration to be utilized for volume control, etc.
C. Results of infiltration tests.
D. Applicable municipal Subdivision and Land Development and/or Zoning
ordinance provisions.
E. The conceptual project layout, including proposed structural and
nonstructural BMPs.
Approval of a SWM site plan shall be valid for a period not to exceed five years. This time period shall commence on the date that the Township approves the SWM site plan. If a certificate of completion required by this chapter has not been submitted within the specified time period, then the Township may consider the SWM site plan disapproved and may revoke any and all permits issued by the Township. SWM site plans that are considered disapproved by the Township may be resubmitted in accordance with §
260-32 of this chapter.