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 an 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.
A. 
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.
B. 
The following items shall be included in the SWM site plan:
(1) 
General:
(a) 
A general description of the project, including plan contents described in Subsection B(2).
(b) 
A general description of proposed SWM techniques to be used for SWM facilities.
(c) 
Complete hydrologic and hydraulic computations for all SWM facilities.
(d) 
All reviews and letters of adequacy from the Conservation District for the erosion and sedimentation plan as required by Warrington Township, county or state regulations.
(e) 
A general description of proposed nonpoint-source pollution controls.
(f) 
The SWM site plan application and associated fee for all regulated activities not already paying fees by/under the SALDO regulations (Appendix C-1).[1]
[1]
Editor's Note: Appendix C is on file in the Township offices.
(g) 
The SWM site plan checklist (Appendix C-2).
(h) 
Appropriate sections from the Warrington Township Code of Ordinances, as amended from time to time, shall be followed in preparing the SWM site plan.
(2) 
Plans. SWM site plan shall provide the following information:
(a) 
The overall stormwater management concept for the project.
(b) 
A determination of natural site conditions and stormwater management needs. This shall include but not be limited to:
[1] 
Site features:
[a] 
The location of the project relative to highways, municipal boundaries or other identifiable landmarks.
[b] 
The locations of all existing and proposed utilities, sanitary sewers, and water lines on site and to within 50 feet of property lines.
[c] 
Proposed structures, roads, paved areas, and buildings.
[d] 
The total tract boundary and size, with distances marked to the nearest hundredth of a foot and bearings to the nearest second.
[e] 
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).
[f] 
The locations and minimum setback distances of existing and proposed on-lot wastewater facilities and water supply wells.
[g] 
The location of all erosion and sediment control facilities.
[h] 
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.
[2] 
Natural site conditions:
[a] 
An existing resource and site analysis map (ERSAM) showing environmentally sensitive areas, including but not limited to:
[i] 
Steep slopes.
[ii] 
Ponds.
[iii] 
Lakes.
[iv] 
Streams.
[v] 
Wetlands.
[vi] 
Hydric soils.
[vii] 
Hydrologic Soil Groups A and B.
[viii] 
Vernal pools.
[ix] 
Stream buffers.
[x] 
Open channels.
[xi] 
Existing recharge areas.
[xii] 
Floodplains.
[b] 
The area of each of these sensitive areas shall be calculated and should be consistent with the runoff volume calculation in § 288-12B(3)(a).
[c] 
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.
[d] 
Existing and proposed contour lines (two feet).
[e] 
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.
[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 § 288-10.
[4] 
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.
(c) 
The format of the plan shall include the following:
[1] 
The expected project time schedule.
[2] 
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.
[3] 
The date of submission.
[4] 
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.
[5] 
A North arrow.
[6] 
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.
[7] 
A key map showing all existing man-made features beyond the property boundary that would be affected by the project.
[8] 
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.
[9] 
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."
[10] 
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.
(d) 
A soil erosion and sediment control plan, where applicable, as prepared for and submitted to the approval authority.
(e) 
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 paper copies of the SWM site plan and two digital (e.g., PDF on compact disks) copies of the SWM site plan, accompanied by the requisite municipal review fee, as specified in this chapter, shall be submitted to Warrington Township. The Township shall distribute the SWM site plan as indicated below:
(1) 
Two paper copies and one digital copy to the municipality.
(2) 
Two paper copies to the County Conservation District.
(3) 
One paper copy and one digital to the Township Engineer.
(4) 
One paper 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 Municipalities Planning Code.[1]
[1]
Editor's Note: 53 P.S. § 10101 et seq.
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. 
The SWM site plan shall be reviewed by the Township Engineer on behalf of the municipality for consistency with the provisions of this chapter. After review, the Township Engineer shall provide a written recommendation for the municipality to approve or disapprove the SWM site plan. If it is recommended to disapprove the SWM site plan, the Township Engineer shall state the reasons for the disapproval in writing. The Township Engineer 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: 53 P.S. § 10101 et seq.
B. 
The municipality 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 municipality. If the municipality disapproves the SWM site plan, the municipality 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 municipality shall require a resubmission of the modified SWM site plan in accordance with this Article IV.
A disapproved SWM site plan may be resubmitted, with the revisions addressing the municipality's concerns, to the municipality in accordance with this Article IV. The applicable review fee must accompany a resubmission of a disapproved SWM site plan.
[Added 7-12-2022 by Ord. No. 2022-O-07]
Any permit or authorization issued or approved based on false, misleading, or erroneous information provided by an applicant is void without the necessity of any proceedings for revocation. Any work undertaken or use established pursuant to such permit or other authorization is unlawful. No action may be taken by a board, agency or employee of the municipality purporting to validate such a violation.
[Added 7-12-2022 by Ord. No. 2022-O-07]
A. 
If the municipality determines that any requirement under this chapter cannot be achieved for a particular regulated activity, the Township may, after an evaluation of alternatives, approve measures other than those in this chapter, subject to § 288-21.2B and C.
B. 
Waivers or modifications of the requirements of this chapter may be approved by the municipality if enforcement will exact undue hardship because of peculiar conditions pertaining to the land in question, provided that the modifications will not be contrary to the public interest and that the purpose of the chapter is preserved. Cost or financial burden shall not be considered a hardship. Modification may be considered if an alternative standard or approach will provide equal or better achievement of the purpose of the chapter. A request for modifications shall be in writing and accompany the stormwater management site plan submission. The request shall provide the facts on which the request is based, the provision(s) of the chapter involved and the proposed modification.
C. 
No waiver or modification of any regulated stormwater activity involving earth disturbance greater than or equal to one acre may be granted by the municipality unless that action is approved in advance by the Department of Environmental Protection (DEP) or the delegated county conservation district.
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 this section 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 § 288-21 of this chapter.