1. For all regulated activities, unless preparation of an SWM site plan is specifically exempted in § 26-302:
A. Preparation and implementation of an approved SWM site plan is required meeting the following.
(1) Minor land disturbance.
(a) An application for a stormwater management permit for a minor land disturbance, as defined in this Chapter, shall include:
1) One completed copy of the application for a stormwater management permit (see Appendix No. 1).
2) Three paper copies and one electronic PDF of the stormwater management plan (see § 26-401 for plan contents).
3) Filing fee in the amount specified in the fee schedule as established by resolution or Chapter of the Borough Council.
(b) In the event the review of the minor land disturbance permit application reveals the potential for impacts to downstream properties, the Borough may require the applicant to submit additional information to demonstrate compliance with the requirements of this Chapter. Such information may include portions or all of the requirements for a major land disturbance.
(2) Major land disturbance. An application for a stormwater management permit for a major land disturbance activity, as defined in this Chapter, shall include the following items:
(a) One completed copy of the application for a stormwater management permit (see Appendix No. 2).
(b) Three paper copies and one electronic PDF of the stormwater management plan and report (See § 26-401 for Plan Contents).
(c) Filing fee in the amount specified in the fee schedule as established by resolution or Ordinance of the Borough Council.
(d) Performance bond, when applicable (see § 26-503 and Part 5 of Subdivision and Land Development Ordinance).
B. No regulated activities shall commence until the Municipality issues written approval of an SWM site plan, which demonstrates compliance with the requirements of this Chapter.
2. SWM site plans approved by the Municipality, in accordance with § 26-406, shall be on site throughout the duration of the regulated activity.
3. The Municipality may, after consultation with DEP, approve measures for meeting the state water quality requirements other than those in this Chapter, provided that they meet the minimum requirements of, and do not conflict with, state law including, but not limited to, the Clean Streams Law.
4. For all regulated earth disturbance activities, erosion and sediment control BMPs shall be designed, implemented, operated, and maintained during the regulated earth disturbance activities (e.g., during construction) to meet the purposes and requirements of this Chapter and to meet all requirements under Title 25 of the Pennsylvania Code and the Clean Streams Law. Various BMPs and their design standards are listed in the Erosion and Sediment Pollution Control Program Manual (E&S Manual3), No. 363-2134-008, as amended and updated.
5. Impervious areas:
A. The measurement of impervious areas shall include all of the impervious areas in the total proposed development even if development is to take place in stages.
B. For development taking place in stages, the entire development plan must be used in determining conformance with this Chapter.
C. For projects that add impervious area to a parcel, the total impervious area on the parcel is subject to the requirements of this Chapter; except that the volume controls in § 26-303 and the peak rate controls of § 26-304 do not need to be retrofitted to existing impervious areas that are not being altered by the proposed regulated activity.
6. Stormwater flows onto adjacent property shall not be created, increased, decreased, relocated, or otherwise altered without written notification to the adjacent property owner(s). Such stormwater flows shall be subject to the requirements of this Chapter.
7. All regulated activities shall include such measures as necessary to:
A. Protect health, safety, and property.
B. Meet the water quality goals of this Chapter by implementing measures to:
(1) Minimize disturbance to floodplains, wetlands, and wooded areas.
(2) Maintain or extend riparian buffers.
(3) Avoid erosive flow conditions in natural flow pathways.
(4) Minimize thermal impacts to waters of this Commonwealth.
(5) Disconnect impervious surfaces by directing runoff to pervious areas, wherever possible.
C. Incorporate methods described in the Pennsylvania Stormwater Best Management Practices Manual (BMP Manual4). If methods other than green infrastructure and LID methods are proposed to achieve the volume and rate controls required under this Chapter, the SWM site plan must include a detailed justification demonstrating that the use of LID and green infrastructure is not practicable.
8. The design of all facilities over karst shall include an evaluation of measures to minimize adverse effects, prepared by a qualified professional.
9. Infiltration BMPs should be spread out, made as shallow as practicable, and located to maximize use of natural on-site infiltration features while still meeting the other requirements of this Chapter.
10. Normally dry, open top, storage facilities should completely drain both the volume control and rate control capacities over a period of time not less than 24 and not more than 72 hours from the end of the design storm.
11. A. The design storm volumes to be used in the analysis of peak rates of discharge should be obtained from the latest version of the Precipitation-Frequency Atlas of the United States, National Oceanic and Atmospheric Administration (NOAA), National Weather Service, Hydrometeorological Design Studies Center, Silver Spring, Maryland.
B. NOAA’s Atlas 145 can be accessed at: http://hdsc.nws.noaa.gov/hdsc/pfds/.
12. For all regulated activities, SWM BMPs shall be designed, implemented, operated, and maintained to meet the purposes and requirements of this Chapter and to meet all requirements under Title 25 of the Pennsylvania Code, the Clean Streams Law, and the Storm Water Management Act.
13. Various BMPs and their design standards are listed in the BMP Manual4.
(Ord. 643, 10/10/2022)