Infiltration. The surface of infiltration areas are free of accumulated sediment and continue to provide the design infiltration and permeability rates in accordance with the original hydraulic design. Standing water does not exist after 24 hours following a rain event. Subsurface drainage pipes are free of debris and are not clogged with material.
Infiltration. BMPs shall be designed, installed, and maintained to infiltrate runoff to the maximum extent practicable in accordance with the following, except as provided in subsections (C)(3)(e) through (C)(3)(g) of this section.
a. For residential developments, one of the following shall be met:
i. Infiltrate sufficient runoff volume so that the post-development infiltration volume shall be at least of the pre- development infiltration volume, based on an average annual rainfall. However, when designing appropriate infiltration systems to meet this requirement, no more than one percent of the project site is required as an effective infiltration area.
ii. Infiltrate twenty-five (25) percent of the post-development runoff from the two- year, twenty-four (24) hour design storm with a Type II distribution. Separate curve numbers for pervious and impervious surfaces shall be used to calculate runoff volumes and not composite curve numbers as defined in TR-55. However, when designing appropriate infiltration systems to meet this requirement, no more than one percent of the project site is required as an effective infiltration area.
b. For nonresidential development, including commercial, industrial, and institutional development, one of the following shall be met:
i. Infiltrate sufficient runoff volume so that the post-development infiltration volume shall be at least sixty (60) percent of the pre-development infiltration volume, based on an average annual rainfall. However, when designing appropriate infiltration systems to meet this requirement, no more than two percent of the project site is required as an effective infiltration area.
ii. Infiltrate ten (10) percent of the runoff from the two-year, twenty-four (24) hour design storm with a Type II distribution. Separate curve numbers for pervious and impervious surfaces shall be used to calculate runoff volumes, and not composite curve numbers as defined in TR-
Infiltration. BMPs shall be designed, installed, and maintained to infiltrate runoff in accordance with the following requirements. Exemptions and Prohibitions addressing both source locations and BMP treatment locations are located in section 16.06(5).
(1) Development Disturbing One (1) or More Acres
(i) New Development with 10% to 40% Connected Imperviousness. Practices shall be designed to infiltrate sufficient runoff volume so the post-developed infiltration volume shall be at least 90% of the pre- development infiltration volume, based upon average annual rainfall. However, when designing appropriate infiltration systems, no more than 1% of the site is required to be used as effective infiltration area.
(ii) New Development with More Than 40% and Up to 80% Connected Imperviousness. Practices shall be designed to infiltrate sufficient runoff volume so that the post development infiltration volume shall be at least 75% of the pre-development infiltration volume, based on an average annual rainfall. However, when designing appropriate infiltration systems, no more than 2% of the site is required to be used as effective infiltration area.
Infiltration. Each section shall be covered with no less than two feet (0.6 m) of water above the top of the pipe at the highest point. The infiltration will be measured by means of a xxxx located in the downstream manhole. The pressure head of 2 feet (0.6 m) shall be maintained for a period of not less than 24 hours before the xxxx measurements are made.
Infiltration. Following the completion of demolition works and prior to the commencement of any construction, the applicant shall submit a detailed contaminated land survey to the local planning authority to demonstrate that it is safe to utilise infiltration on this xxxxxxxxxx site. Should it transpire that such measures are not safe, then the applicant shall provide details of an alternative scheme to the satisfaction of the local planning authority and these measures shall then be implemented concurrent with the build-out of the scheme and maintained at all times thereafter. Reason: In order to ensure a safe and satisfactory means of surface water disposal as the applicant has advised that it is not possible to do this prior to works (i.e. on-site demolition) commencing.
Infiltration. The seepage of groundwater into the wastewater collection system that is the subject of this Agreement, including by means of service connections, defective or cracked pipes, pipe joints, connections, manhole walls or other means.
Infiltration. “Infiltration” means water entering a sewer system, including sewer service connections, from the ground, through such means as the following, without limitation: defective pipes, pipe joints, connections, or manhole walls. Infiltration does not include, and is distinguished from, Inflow.
Infiltration. Water that enters a sewerage system (including sewer service connections) from the ground, through such sources as defective pipe, pipe joints, connections, or manholes. Infiltration does not include, and is distinguished from, inflow.
Infiltration. Water entering the sewage system (including building drains and pipes) from the ground through sources such as, but not limited to, defective pipes, pipe joints, connections and manhole walls.
Infiltration. A. The Township agrees to enact, keep in force and enforce appropriate ordinances to the end that the waters or wastes discharged by any user into its Sewage Collection System shall not contain storm water, sump pump discharges, roof or surface drainage, or any discharges other than Sewage Wastes as herein defined.
B. The Township shall perform routine monitoring and evaluation of the collection system to ascertain the presence of excessive infiltration and inflow (I&I). This monitoring and evaluation will be facilitated with the installation of flow meters by the Township at the currently unmetered points of connection with the Borough’s system. The Township shall conduct inspections of its sewage collection system in areas identified as having excessive I&I and undertake a program of I&I mitigation in those areas. The program shall insure that the Township’s sewage collection system is inspected for I&I on an ongoing basis and that the Township-performs repairs of facilities where excessive I & I is discovered. The Township shall make reasonable efforts to eliminate/reduce to the extent possible, all sources of inflow and infiltration discovered in the ongoing inspections no later than one (1) year from the completion of the inspection. The source of any excessive inflow or infiltration shall be located and corrected by Township directly or via enforcement actions undertaken against any party illegally discharging into the system. The Township agrees to report to the Borough on an annual basis the actions and outcomes of the I&I program as part of the Chapter 94 Municipal Wasteload Management Report also filed with DEP. The Township shall appropriate funds to undertake I&I mitigation projects that result in the reduction of I&I.
