Unless the context specifically indicates otherwise, the meanings
of terms used in these provisions shall be as follows:
BEST MANAGEMENT PRACTICES (BMP)
Schedules of activities, prohibitions of practices, general
good housekeeping practices, pollution prevention and educational
practices, maintenance procedures, and other management practices
to prevent or reduce the discharge of pollutants directly or indirectly
to stormwater, receiving waters, or stormwater conveyance systems.
BMP also include treatment practices, operating procedures, and practices
to control site runoff, spillage or leaks, sludge or water disposal,
or drainage from raw materials storage.
CLEAN WATER ACT (CWA)
The federal Water Pollution Control Act (33 U.S.C. § 1251
et seq.), and any subsequent amendments thereto.
CONSTRUCTION ACTIVITY
Activities subject to NPDES construction permits. Currently
these include construction projects resulting in land disturbances
of one acre or more. Such activities include but are not limited to
clearing, grubbing, excavating, and demolition.
DEVELOPMENT
The division of a parcel of land into two or more parcels;
the construction, reconstruction, conversion, structural alteration,
relocation or enlargement of any building or structure; any mining
excavation or landfill; and any use or change in the use of any building
or other structure or land or extension of use of land by any person
for which a permit is required under Norwalk City Code and/or Zoning
Regulations.
DRAINAGE AREA
A geographic area within which stormwater, sediments, or
dissolved materials drain to a particular receiving water body or
to a particular point along a receiving water body.
HAZARDOUS MATERIALS
Any material, including any substance, waste, or combination
thereof, which because of its quantity, concentration, or physical,
chemical, or infectious characteristics may cause or significantly
contribute to a substantial present or potential hazard to human health,
safety, property or the environment when improperly treated, stored,
transported, disposed of, or otherwise managed.
ILLEGAL DISCHARGE
Any direct or indirect non-stormwater discharge to the storm drain system, except as exempted in §
93-10 of this chapter.
ILLICIT CONNECTIONS
Either of the following:
(1)
Any drain or conveyance, whether on the surface or subsurface,
which allows an illegal discharge to enter the storm drain system,
including but not limited to any conveyances which allow any non-stormwater
discharge including sewage, process wastewater, and wash water to
enter the storm drain system and any connections to the storm drain
system from indoor drains and sinks, regardless of whether said drain
or connection had been previously allowed, permitted, or approved
by an authorized enforcement agency; or
(2)
Any drain or conveyance connected from a commercial or industrial
land use to the storm drain system which has not been documented in
plans, maps, or equivalent records and approved by an authorized enforcement
agency.
IMPERVIOUS SURFACE
A surface that has been covered with a layer of material
so that it is highly resistant to infiltration by water.
INDUSTRIAL ACTIVITY
Activities subject to NPDES industrial permits as defined
in 40 CFR Section 122.26 (b)(14).
MAJOR DEVELOPMENT
Any development that provides for ultimately disturbing one
or more acres of land. Disturbance for the purpose of this rule is
the placement of impervious surface or exposure and/or movement of
soil or bedrock or clearing, cutting, or removing of vegetation.
NON-STORMWATER DISCHARGE
Any discharge to the storm drain system that is not composed
of surface flow, runoff, or drainage consisting entirely of water
from any form of natural precipitation, or resulting from such precipitation.
PERSON
Any individual, association, organization, partnership, firm,
corporation or other entity recognized by law and acting as either
the owner or as the owner's agent.
POLLUTANT
Anything which causes or contributes to pollution. Pollutants
may include, but are not limited to: paints, varnishes, and solvents;
oil and other automotive fluids; nonhazardous liquid and solid wastes
and yard wastes; refuse, rubbish, garbage, litter, or other discarded
or abandoned objects, ordinances, and accumulations, so that same
may cause or contribute to pollution; floatables; pesticides, herbicides,
and fertilizers; hazardous substances and wastes; sewage, fecal coliform
and pathogens; dissolved and particulate metals; animal wastes; wastes
and residues that result from constructing a building or structure;
and noxious or offensive matter of any kind.
PREMISES
Any building, lot, parcel of land, or portion of land whether
improved or unimproved, including adjacent sidewalks and parking strips.
RECHARGE
The amount of water from precipitation that infiltrates into
the ground and is not evapotranspired.
SEDIMENT
Solid material, mineral or organic, that is in suspension,
is being transported, or has been moved from its site of origin by
air, water or gravity as a product of erosion.
STORM DRAINAGE SYSTEM
Publicly owned facilities by which stormwater is collected
and/or conveyed, including but not limited to any roads with drainage
systems, municipal streets, gutters, curbs, inlets, piped storm drains,
pumping facilities, retention and detention basins, natural and human-made
or altered drainage channels, reservoirs, and other drainage structures.
STORMWATER
Any surface flow, runoff, and drainage consisting entirely
of water from any form of natural precipitation, and resulting from
such precipitation.
STORMWATER POLLUTION PREVENTION PLAN
A document which describes the best management practices
and activities to be implemented by a person or business to identify
sources of pollution or contamination at a site and the actions to
eliminate or reduce pollutant discharges to stormwater, stormwater
conveyance systems, and/or receiving waters to the maximum extent
practicable.
WASTEWATER
Any water or other liquid, other than uncontaminated stormwater,
discharged from a facility.