A.
For the purposes of this chapter, certain terms and words used herein shall be interpreted as follows:
(1)
Words used in the present tense include the future tense; the singular number includes the plural, and the plural number includes the singular, words of masculine gender include feminine gender, and words of feminine gender include masculine gender.
(2)
The words and phrases "includes," "including," "for example," "e.g," and/or other related words and phrases shall not limit the term to the specific example, but are intended to extend their meaning to all other instances of like kind and character.
(3)
The word "person" includes an individual, firm, association, organization, partnership, trust, company, corporation, unit of government, or any other similar entity.
(4)
The words "shall" and "must" are mandatory; the words "may" and "should" are permissive.
(5)
The words "used" or "occupied" include the words "intended, designed, maintained, or arranged to be used occupied or maintained."
B. AGRICULTURAL ACTIVITY ALTERATION APPLICANT AS-BUILT DRAWINGS BASE FLOW BEST MANAGEMENT PRACTICE (BMP) BIORETENTION CHANNEL CONSERVATION DISTRICT CULVERT CURVE NUMBER DAM DEP (DEPARTMENT) DESIGN PROFESSIONAL (QUALIFIED) DESIGN STORM DESIGNEE DETENTION BASIN DETENTION VOLUME DEVELOPER DEVELOPMENT DEVELOPMENT SITE (SITE) DISCHARGE DISCHARGE POINT DISCONNECTED IMPERVIOUS AREA (DIA) DISTURBED AREA DITCH DRAINAGE EASEMENT (SWM CONSERVATION EASEMENT) EARTH DISTURBANCE ACTIVITY EMERGENCY SPILLWAY ENCROACHMENT EROSION EROSION AND SEDIMENT CONTROL FACILITY EROSION AND SEDIMENT CONTROL PLAN EXCEPTIONAL VALUE WATERS EXISTING CONDITION EXISTING RECHARGE AREA FACILITY, CONVEYANCE FACILITY, EROSION AND SEDIMENT CONTROL FACILITY, STORMWATER MANAGEMENT FEMA FLOOD FLOODPLAIN FLOODWAY The channel of the watercourse and those portions of the adjoining floodplains that are reasonably required to carry and discharge the 100-year flood. Unless otherwise specified, the boundary of the floodway is as indicated on maps and flood insurance studies provided by FEMA. In an area where no FEMA maps or studies have defined the boundary of the 100-year floodway, it is assumed - absent evidence to the contrary FOREST MANAGEMENT/TIMBER OPERATIONS FREEBOARD GOVERNING BODY GRADE GREEN INFRASTRUCTURE GROUNDWATER GROUNDWATER RECHARGE HIGH QUALITY WATERS HOTSPOT USE HYDROGRAPH HYDROLOGIC REGIME HYDROLOGIC SOIL GROUP (HSG) IMPERVIOUS SURFACE (IMPERVIOUS AREA) IMPOUNDMENT INFILTRATION INFILTRATION STRUCTURES INITIAL ABSTRACTION (Ia) INLET KARST LAND DEVELOPMENT (DEVELOPMENT) LIMITING ZONE(1) (2) (3) LOT LOW IMPACT DEVELOPMENT (LID) MANNING EQUATION (MANNING FORMULA) MS4 MUNICIPAL ENGINEER (TOWNSHIP ENGINEER) MUNICIPALITY (TOWNSHIP) NONPOINT SOURCE POLLUTION NONSTORMWATER DISCHARGES NPDES NRCS NRCS TYPE-II CURVE NUMBER METHOD (SCS) OUTFALL OUTLET PEAK DISCHARGE PERVIOUS AREA PIPE POINT SOURCE POST CONSTRUCTION PREDEVELOPMENT PRETREATMENT PROJECT SITE QUALIFIED PROFESSIONAL RECHARGE REDEVELOPMENT REGULATED ACTIVITIES REGULATED EARTH DISTURBANCE ACTIVITY RELEASE RATE RETENTION BASIN RETENTION VOLUME/REMOVED RUNOFF RETURN PERIOD RIPARIAN BUFFER ROOF DRAINS RUNOFF SALDO SEDIMENT SEDIMENT POLLUTION SEDIMENTATION SEEPAGE PIT/SEEPAGE TRENCH SEPARATE STORM SEWER SYSTEM SHALLOW CONCENTRATED FLOW SHEET FLOW SOURCE WATER PROTECTION AREAS (SWPA) SPECIAL PROTECTION SUBWATERSHEDS SPILLWAY STATE WATER QUALITY REQUIREMENTS STORM FREQUENCY STORM SEWER STORMWATER STORMWATER MANAGEMENT FACILITY STORMWATER MANAGEMENT PERMIT(1) (2) STORMWATER MANAGEMENT REPORT STORMWATER MANAGEMENT SITE PLAN SUBAREA (SUBWATERSHED) SUBDIVISION SURFACE WATERS OF THE COMMONWEALTH SWALE TIME-OF-CONCENTRATION(TC) USDA VERNAL POOL WATERCOURSE WATERS OF THIS COMMONWEALTH WATERSHED WELLHEAD WELLHEAD PROTECTION AREA WET BASIN WETLAND
These definitions do not necessarily reflect the definitions contained in other, potentially-related regulations or statutes unless otherwise stated, and are intended for this chapter only.
Activities associated with agricultural operations as defined in the Pennsylvania Municipalities Planning Code, as amended, updated, and/or replaced.[1] Examples may include agricultural cultivation; agricultural operation; animal heavy-use areas; the work of producing crops including tillage, land clearing, plowing, disking, harrowing, planting, and harvesting crops; pasturing and raising of livestock; and installation of approved agriculturally-related conservation measures. Construction of new buildings or impervious area is not considered an agricultural activity.
As applied to land, a change in topography as a result of the moving of soil and rock from one location or position to another; also the changing of surface conditions by causing the surface to be more or less impervious as the result of changing the land cover including the water, vegetation and bare soil.
A landowner, developer, or other person/entity who has filed an application to the Township for approval to engage in any regulated activity at a project site in the Township. "Applicant" also refers to any person/entity that may be exempt from certain, but not all, provisions of this chapter.
Engineering or site drawings maintained by the contractor as he constructs the project and upon which he documents the actual locations of the components and changes to the approved contract documents. These documents, or a copy of same, are turned over to the qualified professional at the completion of the project.
Portion of stream discharge derived from groundwater; the sustained discharge that does not result from direct runoff or from water diversions, reservoir releases, piped discharges, or other human activities. Piped springs are not exempt from being classified as groundwater due to human activity.
Activities, facilities, designs, measures, or procedures used to manage stormwater impacts from regulated activities, to meet state water quality requirements, to promote groundwater recharge, and to otherwise meet the purposes of this chapter. Stormwater BMPs are commonly grouped into one of two broad categories or measures: "structural" or "non-structural." In this chapter, non-structural BMPs or measures refer to operational and/or behavior-related practices that attempt to minimize the contact of pollutants with stormwater runoff, whereas structural BMPs or measures are those that consist of a physical device or practice that is installed to capture and treat stormwater runoff. Structural BMPs include but are not limited to a wide variety of practices and devices, from large-scale retention ponds and constructed wetlands, to small-scale underground treatment systems, infiltration facilities, filter strips, low impact design, bioretention, wet ponds, grassed swales, riparian or forested buffers, sand filters, detention basins, and manufactured devices. Structural stormwater BMPs are permanent appurtenances to the project site.
A stormwater retention area that utilizes woody and herbaceous plants and soils to remove pollutants before infiltration occurs.
An open drainage feature through which stormwater flows. Channels include, but shall not be limited to, natural and man-made watercourses, swales, streams, ditches, canals, and pipes that convey continuously or periodically flowing water.
A structure with its appurtenant works, which carries water under or through an embankment or fill.
Value used in the NRCS Type-II Curve Number Runoff Method (SCS). It is a measure of the percentage of precipitation which is expected to run off from the watershed and is a function of the soil, vegetative cover, and tillage method.
A man-made barrier, together with its appurtenant works, constructed for the purpose of impounding or storing water or another fluid or semifluid. A dam may include a refuse bank, fill or structure for highway, railroad or other purpose which impounds or may impound water or another fluid or semifluid.
The Pennsylvania Department of Environmental Protection.
A Pennsylvania registered professional engineer, registered landscape architect, or registered professional land surveyor trained to develop stormwater management plans.
The magnitude and temporal distribution of precipitation from a storm event measured in probability of occurrence (e.g., a five-year storm) and duration (e.g., 24 hours) used in the design and evaluation of stormwater management systems. Also see "return period."
The agent of the Bucks County Conservation District, and/or agent of the governing body involved with the administration, review, or enforcement of any provisions of this chapter by contract or memorandum of understanding.
An impoundment designed to collect and retard stormwater runoff by temporarily storing the runoff and releasing it at a predetermined rate. Detention basins are designed to drain completely soon after a rainfall event and become dry until the next rainfall event.
The volume of runoff that is captured and released into the waters of the Commonwealth at a controlled rate.
A person that seeks to undertake a land development or subdivision.
Any human-induced change to improved or unimproved real estate, whether public or private, including but not limited to land development, construction, installation or expansion of a building or other structure, land division, street construction, drilling, and site alteration such as embankments, dredging, grubbing, grading, paving, parking or storage facilities, excavation, filling, stockpiling, or clearing. As used in this chapter, development encompasses both new development and redevelopment.
See "project site."
The point of discharge for a stormwater facility.
An impervious or impermeable surface that is disconnected from any stormwater drainage or conveyance system and is redirected or directed to pervious area, which allows for infiltration, filtration, and increased time of concentration (as specified in Appendix F, Disconnected Impervious Area).[2]
An unstabilized land area where an earth disturbance activity is occurring or has occurred.
A man-made waterway constructed for irrigation or stormwater conveyance purposes.
A right granted by a landowner to a grantee, allowing the use of private land for stormwater management or stormwater conveyance purposes.
A construction or other human activity which disturbs the surface of the land, including but not limited to: clearing and grubbing; grading; excavations; embankments; road maintenance; parking lot maintenance; building construction; and the moving, depositing, stockpiling, or storing of soil, rock, or earth materials.
A conveyance area that is used to pass peak discharge greater than the maximum design storm controlled by the stormwater facility.
A structure or activity that changes, expands or diminishes the course, current or cross-section of a watercourse, floodway, or body of water.
The natural process by which the surface of the land is worn away by water, wind, or chemical action.
May be designated as "ESC Facility" throughout this chapter.
A site-specific plan identifying BMPs to minimize accelerated erosion and sedimentation. For agricultural plowing or tilling activities, the erosion and sediment control plan is that portion of a conservation plan identifying BMPs to minimize accelerated erosion and sedimentation.
The dominant land cover and/or condition during the five-year period immediately preceding a proposed regulated activity.
Undisturbed surface area or depression where stormwater collects and a portion of which infiltrates and replenishes the groundwater.
Any structure or practice that is designed and/or constructed to transmit or otherwise transfer stormwater runoff from one location to another. Typical Conveyance Facilities include but are not limited to: swales and other open channel facilities; stormwaters; and pipe culverts.
Any structure or practice that is designed and/or constructed to capture, reduce, prevent, or otherwise mitigate the effects of stormwater runoff and sedimentation. Typical Erosion and Sediment Control Facilities include but are not limited to: erosion control matting, silt fence, silt sock, inlet protection, temporary seeding, and sediment ponds.
Any structure or practice that is designed and/or constructed to store or otherwise attenuate stormwater runoff. Typical stormwater management facilities include but are not limited to: detention and retention basins; rain gardens; and infiltration facilities. "Stormwater Management Facility" may be designated as "SWM Facility" throughout this chapter.
Federal Emergency Management Agency.
A temporary condition of partial or complete inundation of land areas from the overflow of streams, rivers, and other waters of the Commonwealth.
Any land area susceptible to inundation by water from any natural source or the 100 year floodway and that maximum area of land that is likely to be flooded by a 100-year flood as delineated by applicable FEMA maps and studies as being a special flood hazard area. Also includes areas that comprise Group 13 Soils, as listed in Appendix A of the Pennsylvania DEP Technical Manual for Sewage Enforcement Officers (as amended, updated, and/or replaced from time to time by DEP). For the purposes of this chapter, it is assumed that the floodplain encompasses the floodway.
that the floodway extends from the stream to 50 feet landward from the top of the bank of the stream.
Planning and activities necessary for the management of forestland. These include conducting a timber inventory, preparation of forest management plans, silvicultural treatment, cutting budgets, logging road design and construction, timber harvesting, site preparation, and reforestation.
A vertical distance between the elevation of the design high-water and the top of a dam, levee, tank, basin, swale, or diversion berm. The space is required as a safety margin in a pond or basin.
The Lower Makefield Township Board of Supervisors.
Systems and practices that use or mimic natural processes to infiltrate, evapotranspire, or reuse stormwater on the site where it is generated.
Water beneath the earth's surface that supplies wells and springs and is often between saturated soil and rock.
The replenishment of existing natural underground water supplies from rain or overland flow.
Any proposed land use or activity that has the potential to have an increased amount of stormwater pollutant runoff, generally based upon its use or generation of pollutants, including but not limited to: chemicals, oil-based products, pesticides, fertilizers, large traffic volume, and/or outdoor storage. Example uses include but are not limited to automobile repair, filling, and washing facilities; automobile, boat, and trailer storage and/or sales; commercial and/or retail uses with parking lots; restaurants with drive-thrus; industrial or heavy manufacturing establishments; warehousing; athletic fields; golf courses; and swimming pools not accessory to an individual residential use.
A graph representing the discharge of water versus time for a selected point in the drainage system.
The hydrologic cycle or balance that sustains quality and quantity of stormwater, baseflow, storage, and groundwater supplies under natural conditions.
Infiltration rates of soils vary widely and are affected by subsurface permeability as well as surface intake rates. Soils are classified into four HSGs (A, B, C, and D) according to their minimum infiltration rate, which is obtained for bare soil after prolonged wetting. The NRCS defines the four groups and provides a list of most of the soils in the United States and their group classification. The soils in the area of the development site may be identified from a soil survey report that can be obtained from local NRCS offices or conservation district offices. Soils become less pervious as the HSG varies from A to D(NRCS[3]).
A surface that prevents the infiltration of water into the ground. Impervious surfaces (or areas) shall include but not be limited to: roofs; additional indoor living spaces; patios and similar structures (including those made of wood or other planks); rock, crushed stone, or aggregate of any kind; pools, ponds, and other permanent water-storage areas; garages; storage sheds and similar structures; driveways; and any new streets or sidewalks. For the purposes of this definition, structures that are elevated a minimum of 18 inches above ground level, have completely pervious material beneath the structure, and provide means for water flow through the structure shall be considered pervious (i.e., decks or awnings). Pervious pavement and similar surfaces that are specifically designed to allow for porous infiltration of stormwater are considered partially impervious surfaces in accordance with Chapter 200, Zoning, § 200-50.4. For calculation purposes, 50% of the area covered by pervious pavement shall be considered impervious while the remaining 50% shall be considered grass, in good condition, or similar cover type. Pervious pavement and similar surfaces that are specifically designed to allow for porous infiltration of stormwater may be used if constructed and maintained in accordance with Chapter 200, Zoning, in lieu of traditional SWM conveyance facilities, such as inlets and pipes, in order to provide for the transmission of stormwater runoff to subsurface SWM Facilities; if this method of transmission is utilized, the surfaces in question are still considered partially impervious surfaces for this chapter and the purpose of modeling.
A retention or detention basin designed to retain stormwater runoff and release it at a controlled rate.
Movement of surface water into the soil, where it is absorbed by plant roots, evaporated into the atmosphere, or percolated downward to recharge groundwater.
A structure designed to direct runoff into the underground water (e.g., french drains, seepage pits, or seepage trenches).
The value used to calculate the volume or peak rate of runoff in the NRCS Type-II Curve Number Runoff Method (SCS). It represents the depth of rain retained on vegetation plus the depth of rain stored on the soil surface plus the depth of rain infiltrated prior to the start of runoff.
The upstream end of any structure through which water may flow.
A type of topography or landscape characterized by surface depressions, sinkholes, rock pinnacles/uneven bedrock surface, underground drainage, and caves. Karst is formed on carbonate rocks, such as limestone or dolomite.
As defined in Chapter 178, Subdivision and Land Development.
A soil horizon or condition in the soil profile or underlying strata which includes one of the following:
A seasonal high water table, whether perched or regional, determined by direct observation of the water table or indicated by soil mottling.
A rock with open joints, fracture or solution channels, or masses of loose rock fragments, including gravel, with insufficient fine soil to fill the voids between the fragments.
A rock formation, other stratum or soil condition which is so slowly permeable that it effectively limits downward passage of effluent.
A designated parcel, tract or area of land established by a plat or otherwise as permitted by law and to be used, developed or built upon as a unit.
Site design approaches and small-scale stormwater management practices that promote the use of natural systems for infiltration, evapotranspiration, and reuse of rainwater. LID can be applied to new development, urban retrofits, and revitalization projects. LID utilizes design techniques that infiltrate, filter, evaporate, and store runoff close to its source. Rather than rely on costly large-scale conveyance and treatment systems, LID addresses stormwater through a variety of small, cost-effective landscape features located on-site.
A method for calculation of velocity of flow (e.g., feet per second) and flow rate (e.g., cubic feet per second) in open channels based upon channel shape, roughness, depth of flow and slope. "Open channels" may include closed conduits so long as the flow is not under pressure.
The Municipal Separate Storm Sewer System of the Township as regulated by the laws of the Commonwealth and the United States.
A professional engineer licensed as such in the Commonwealth of Pennsylvania, duly appointed by Lower Makefield Township as the Township Engineer.
Lower Makefield Township, Bucks County, Pennsylvania.
Pollution that enters a water body from diffuse origins in the Township and does not result from discernible, confined, or discrete conveyances.
Water flowing in stormwater collection facilities, such as pipes or swales, which is not the result of a rainfall event or snowmelt.
National Pollutant Discharge Elimination System, the federal government's system for issuance of permits under the Clean Water Act, which is delegated to PADEP in Pennsylvania.
USDA Natural Resources Conservation Service (previously SCS).
A method of runoff computation developed by the NRCS that is based on relating soil type and land use/cover to a runoff parameter called Curve Number (CN).
"Point source" at the point where the Township's storm sewer system discharges to surface waters of the Commonwealth.
Points of water disposal to a stream, river, lake, tidewater or artificial drain.
The maximum rate of stormwater runoff from a specific storm event.
Any area not defined as an impervious area, typically allows the infiltration of water into the ground.
A culvert, closed conduit, or similar structure (including appurtenances) that conveys stormwater.
Period after construction during which disturbed areas are stabilized, stormwater controls are in place and functioning and all proposed improvements in the approved plan are completed.
See "existing condition."
Techniques employed in stormwater BMPs to provide storage or filtering to trap coarse materials and other pollutants before they enter the system.
The specific area of land where any regulated activities in the Township are planned, conducted, or maintained.
Any person licensed by the Pennsylvania Department of State or otherwise qualified by law to perform the work required by this chapter.
The replenishment of groundwater through the infiltration of rainfall, other surface waters, or land application of water or treated wastewater.
Any development that requires demolition or removal of existing structures or impervious surfaces at a site and replacement with new impervious surfaces. Maintenance activities such as top-layer grinding and repaving are not considered to be redevelopment. Interior remodeling projects and tenant improvements are also not considered to be redevelopment. Utility trenches in streets are not considered redevelopment unless more than 50% of the street width including shoulders is removed and repaved.
Any earth disturbance activities, any activities that involve the alteration or development of land in a manner that may affect stormwater runoff, or any activities that clearly increase the pollution potential of stormwater runoff.
The percentage of existing conditions peak rate of runoff from a site or subarea to which the proposed conditions peak rate of runoff must be reduced to protect downstream areas.
A structure in which stormwater is stored and not released during the storm event. Retention basins are designed for infiltration purposes, and do not have an outlet. The retention basin must infiltrate stored water in four days or less.
The volume of runoff that is captured and not released directly into the surface waters of this Commonwealth during or after a storm event.
The average interval, in years, within which a storm event of a given magnitude can be expected to occur one time. For example, the 25-year return period rainfall would be expected to occur on average once every 25 years. Stated in another way, the probability of a 25-year storm occurring in any one year is 0.04 (i.e., a 4% chance).
A permanent area of trees and shrubs located adjacent to streams, lakes, ponds, and wetlands.
A drainage conduit or pipe that collects water runoff from a roof and leads it away from the structure.
Any part of precipitation that flows over the land.
Chapter 178,Subdivision and Land Development.
Soils or other materials transported by surface water as a product of erosion.
The placement, discharge or any other introduction of sediment into the waters of the Commonwealth.
The process by which mineral or organic matter is accumulated or deposited by the movement of water or air.
An area of excavated earth filled with loose stone or similar coarse material, into which surface water is directed for infiltration into the underground water.
A conveyance or system of conveyances (including roads with drainage systems, Township streets, catch basins, curbs, gutters, ditches, man-made channels or storm drains) primarily used for collecting and conveying stormwater runoff.
Stormwater runoff flowing in shallow, defined ruts prior to entering a defined channel or waterway.
A flow process associated with broad, shallow water movement on sloping ground surfaces that is not channelized or concentrated.
The zone through which contaminants, if present, are likely to migrate and reach a drinking water well or surface water intake.
A conveyance that is used to pass the peak discharge of the maximum design storm that is controlled by the stormwater facility.
The number of times that a given storm "event" occurs or is exceeded on the average in a stated period of years. See "return period."
A system of pipes and/or open channels that convey intercepted runoff and stormwater from other sources, but excludes domestic sewage and industrial wastes.
Drainage runoff from the surface of the land resulting from precipitation, snow, or ice melt.
Any structure, natural or man-made, that, due to its condition, design, or construction, conveys, stores, or otherwise affects stormwater runoff quality, rate or quantity. Typical stormwater management facilities include, but are not limited to, detention and retention basins, open channels, storm sewers, pipes, and infiltration structures.
The permit prepared by the applicant or his or her representative providing necessary details, including but not limited to disturbance area, impervious areas, and other items. "Stormwater Management Permit" will be designated as "SWM Permit" throughout this chapter, and shall be divided into two categories:
MINOR SWM PERMITRegulated activities that result in: the alteration or development of 1,000 to 5,000 SF of land in a manner that may affect stormwater runoff; earth disturbances of 5,000 to 43,559 SF; and/or the cumulative increase of 1,000 to 5,000 SF of impervious area. "Cumulative" shall include incremental and phased development.
MAJOR SWM PERMITRegulated activities that result in: the alteration or development of greater than 5,000 SF of land in a manner that may affect stormwater runoff; earth disturbances of greater than or equal to 43,560 SF; and/or the cumulative increase of greater than 5,000 SF of impervious area. Regulated activities taking place on sites: 1) with greater than 5,000 SF of existing impervious area within the limit of disturbance that are not controlling the runoff from the existing impervious area in a manner consistent with this chapter; and 2) whose activities do not qualify for the exemptions listed in § 173-13, shall also fall under the category of Major SWM Permit. "Cumulative" shall include incremental and phased development.
The report prepared by the applicant or his or her representative documenting the necessary design computations and data in order to demonstrate that the maximum practicable measures have been taken to meet the requirements of this chapter. "Stormwater Management Report" will be designated as "SWM Report" throughout this chapter.
The plan prepared by the applicant or his or her representative indicating how stormwater runoff will be managed at the development site in accordance with this chapter. "Stormwater Management Site Plan" will be designated as "SWM Site Plan" throughout this chapter.
The smallest drainage unit of a watershed for which stormwater management criteria have been established in the SWM Site Plan.
As defined in Chapter 178, Subdivision and Land Development.
Any and all rivers, streams, creeks, rivulets, ditches, watercourses, storm sewers, lakes, dammed water, wetlands, ponds, springs, and all other bodies or channels of conveyance of surface waters, or parts thereof, whether natural or artificial, within or on the boundaries of the Commonwealth.
A low-lying stretch of land that gathers or carries surface water runoff.
The time required for surface runoff to travel from the hydraulically most distant point of the watershed to a point of interest within the watershed. This time is the combined total of overland flow time and flow time in pipes or channels, if any.
United States Department of Agriculture.
Seasonal depressional wetlands that are covered by shallow water for variable periods from winter to spring, but may be completely dry for most of the summer and fall.
A channel or conveyance of surface water having a defined bed and banks, whether natural or artificial, with perennial or intermittent flow.
Any and all rivers, streams, creeks, rivulets, impoundments, ditches, watercourses, storm sewers, lakes, dammed water, wetlands, ponds, springs, and all other bodies or channels of conveyance of surface and underground water, or parts thereof, whether natural or artificial, within or on the boundaries of this Commonwealth.
Region or area drained by a river, watercourse, or other surface water of this Commonwealth.
A structure built over a well, or the source of water for a well.
The surface and subsurface area surrounding a water supply well, well field, spring, or infiltration gallery supplying a public water system, through which contaminants are reasonably likely to move towards and reach the water source.
Pond for runoff management that is designed to detain urban runoff and always contains water.
Areas that are inundated or saturated by surface or groundwater at a frequency and duration sufficient to support, and that under normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil conditions, including swamps, marshes, bogs, and similar areas.
[2]
Editor's Note: Appendix F, Disconnected Impervious Area (DIA), is included as an attachment to this chapter.
[4]
Editor's Note: Former Title 25, Chapter 92, of the Pennsylvania Code was reserved 10-9-2010. See now 25 Pa. Code § 92a.1 et seq.