(A) For all regulated earth disturbance activities, erosion and sediment control BMPs shall be designed, implemented, operated and maintained during the regulated earth disturbance activities (during construction) to meet the purposes and requirements of this chapter and to meet all requirements under the Pa.Code Title 25 and the Pennsylvania Clean Streams Law. Various BMPs and their design standards are listed in the E&S Manual.
(B) Regulated arth disturbance activities that do not qualify for exemption pursuant to § 151.006 shall not commence until approval by the township of an erosion and sediment control plan for construction activities.
(C) DEP regulations that require an erosion and sediment control plan for any earth disturbance activity of 5,000 square feet or more, under 25 Pa.Code § 102.4(b); a NPDES Construction Activities permit is required for regulated earth disturbance activities exceeding one acre.
(D) Evidence of any necessary permit(s) for regulated earth disturbance activities from the appropriate DEP regional office or Conservation District must be submitted to the township.
(E) A copy of the erosion and sediment control plan and any required permit, as required by DEP regulations shall be available at the project site at all times.
(F) Additional erosion and sedimentation control design standards and criteria:
(1) All lots must be kept free of any debris or nuisances whatsoever during construction;
(2) Design of erosion and sedimentation control facilities (particularly stormwater/sediment basins) shall incorporate best management practices, as defined herein;
(3) No grading equipment shall be permitted to be loaded and/or unloaded on a public street, and no grading equipment shall be permitted to travel on or across a public street unless licensed for operation on public thoroughfares;
(4) Grading equipment shall not be permitted to cross intermittent and perennial streams. Temporary crossing shall only be permitted where application is made, and approval is received, from DEP (where applicable), the Conservation District and the township;
(5) To control the dissemination of mud and dirt on to public roads and driveways, tire cleaning areas constructed of AASHTO No. 1 stone (underlain by geotextile structural fabric), at least 50 feet in length shall be installed at each point of access to the site and individual lots (upon construction of internal streets in a binder condition). When deemed necessary by the township, washing stations shall also be set-up at every construction entrance in order to wash mud and dirt from exiting vehicles. Appropriate measures must be taken to control runoff from such locations. The developer shall be responsible for the placement of appropriate signage identifying construction entrances and washing stations. Construction entrances shall be maintained by the developer during construction, as determined by the township;
(6) During construction activities, necessary measures for dust control shall be exercised, including the application of water to higher traffic areas of the site;
(7) In the event any mud and/or debris is transported from the site onto a public roadway, the debris shall be removed immediately, and the roadway swept and/or washed as deemed necessary by the township at the developer’s expense; and
(8) Areas proposed for infiltration BMPs shall be protected from sedimentation and compaction during the construction phase, so as to maintain their maximum infiltration capacity. Thirty-three inches super filter fabric fence, silt sock or other approved protection mechanism must be installed around proposed infiltration areas to prevent encroachment and compaction by construction equipment.
(G) Peak discharges and discharge volumes from the site shall comply with the appropriate sections above, with the following additions:
(1) For purposes of calculating required detention storage volume during land disturbance, peak discharge rates and volumes shall be calculated based upon runoff coefficients for bare soils during the maximum extent of disturbance from clearing, grading and impervious surface installation, shown on the development plan. Controls shall ensure that the difference in volume and rate of peak discharges before disturbance and during shall not exceed those peak discharges and volumes required in §§ 151.026 and 151.027. Detention storage during the period of land disturbance and prior to establishment of permanent cover may require additional facilities on a temporary basis. Such measures shall be located so as to preserve the natural soil infiltration capacities of the planned infiltration areas. Calculations based on the above parameters must be submitted to verify during construction runoff rate does not exceed predevelopment runoff rate for the one-year frequency through 100-year frequency design storm events; and
(2) Wherever soils, topography, cut and fill or grading requirements, or other conditions suggest substantial erosion potential during land disturbance, the township may require that the entire volume of all storms up to a two-year storm from the disturbed areas be retained on site and that special sediment trapping facilities (such as check dams and the like) be installed.
(H) Areas of the site to remain undisturbed shall be protected against encroachment from construction equipment/vehicles to maintain the existing infiltration characteristics of the soil. A four- foot high orange safety fence or other similar protection fence approved by the township must be installed around the entire limit of disturbance/clearing prior to commencement of earthmoving activities, and maintained until completion of all construction activity.
(Ord. 239, passed 10-14-2020)