The following words and terms, when used in this subchapter,
shall have the following meanings, unless the context clearly indicates
otherwise.
(1) Active geologic processes--Any natural process
which alters the surface and/or subsurface of the earth, including,
but not limited to, erosion (including shoreline erosion along the
coast), submergence, subsidence, faulting, karst formation, flooding
in alluvial flood wash zones, meandering river bank cutting, and earthquakes.
(2) Aquifer--A geologic formation, group of formations,
or part of a formation capable of yielding a significant amount of
groundwater to wells or springs. Portions of formations, such as clay
beds, which are not capable of yielding a significant amount of groundwater
to wells or springs are not aquifers.
(3) Erosion--The group of natural processes, including
weathering, deterioration, detachment, dissolution, abrasion, corrosion,
wearing away, and transportation, by which earthen or rock material
is removed from any part of the earth's surface.
(4) Existing facility--Any facility used for the storage,
processing, or application of domestic wastewater and which has obtained
approval of construction plans and specifications as of March 1, 1990.
(5) New facility--Any domestic wastewater treatment
facility which is not an existing facility.
(6) Nuisance odor prevention--The reduction, treatment,
and dispersal of potential odor conditions that interfere with another's
use and enjoyment of property that are caused by or generated from
a wastewater treatment plant unit, which conditions cannot be prevented
by normal operation and maintenance procedures of the wastewater treatment
unit.
(7) One hundred-year flood plain--Any land area which
is subject to a 1.0% or greater chance of flooding in any given year
from any source.
(8) Substantial change in the function or use--An increase
in the pollutant load or modification in the existing purpose of the
unit.
(9) Wastewater treatment plant unit--Any apparatus
necessary for the purpose of providing treatment of wastewater (i.e.,
aeration basins, splitter boxes, bar screens, sludge drying beds,
clarifiers, overland flow sites, treatment ponds or basins that contain
wastewater, etc.). For purposes of compliance with the requirements
of §309.13(e) of this title (relating to Unsuitable Site Characteristics),
this definition does not include off-site bar screens, off-site lift
stations, flow metering equipment, or post-aeration structures needed
to meet permitted effluent minimum dissolved oxygen limitations.
(10) Wetlands--Those areas that are inundated or saturated
by surface water 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.
Wetlands generally include swamps, marshes, bogs, playa lakes, and
similar areas.
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