Mich. Admin. Code R. 299.4409 - Definitions
Rule 409. As used in this part:
(a) "Airport" means a public-use airport that
is open to the public without prior permission and without restrictions within
the physical capacities of available facilities.
(b) "Appendix II constituents" or
"constituents listed in appendix II" means the constituents listed in the
provisions of 40 C.F.R. part 258, appendix II. The provisions of 40 C.F.R. part
258, appendix II, are adopted by reference in R 299.4134.
(c) "Areas susceptible to mass movement"
means those areas that are characterized as having an active or substantial
possibility of mass movement where the movement of earth material at, beneath,
or adjacent to the landfill unit, because of natural or man-induced events,
results in the downslope transport of soil and rock material by means of
gravitational influence. Areas of mass movement include any of the following:
(i) Landslides.
(ii) Avalanches.
(iii) Debris.
(iv) Slides and flows.
(v) Soil fluctuation.
(vi) Block sliding.
(vii) Rock fall.
(d) "Bird hazard" means an increase in the
likelihood of bird/aircraft collisions that may cause damage to the aircraft or
injury to its occupants.
(e)
"Displacement" means the relative movement of any 2 sides of a fault measured
in any direction.
(f) "Fault" means
a fracture or a zone of fractures in any material along which strata on one
side have been displaced with respect to that on the other side.
(i) "Federal marine protection, research and
sanctuary act of 1972" means Public Law 92-532, 16 U.S.C. S1431 et seq., as
amended.
(j) "Gas condensate" means
the liquid that is generated as a result of a gas recovery process at a type II
landfill unit.
(k) "Holocene" means
the most recent epoch of the quaternary period that extends from the end of the
pleistocene epoch to the present.
(l) "Karst terranes" means areas where karst
topography, with its characteristic surface and subterranean features, is
developed as the result of the dissolution of limestone, dolomite, or other
soluble rock. Characteristic physiographic features present in karst terranes
include all of the following:
(i)
Sinkholes.
(ii) Sinking
streams.
(iii) Caves.
(iv) Large springs.
(v) Blind valleys.
(m) "Lithified earth material" means all rock
and includes all naturally occurring and naturally formed aggregates or masses
of minerals or small particles of older rock that formed by the crystallization
of magma or by the induration of loose sediments. This term does not include
man-made materials, such as fill, concrete, and asphalt, or unconsolidated
earth materials, soil, or regolith that lies at or near the earth's
surface.
(n) "Lower explosive
limit" means the lowest percent by volume of a mixture of explosive gases in
air that will propagate a flame at 25 degrees Celsius and atmospheric
pressure.
(o) "Maximum horizontal
acceleration in lithified earth material" means the maximum expected horizontal
acceleration that is depicted on a seismic hazard map, with a 90% or greater
probability that the acceleration will not be exceeded in 250 years, or the
maximum expected horizontal acceleration based on a site-specific seismic risk
assessment.
(p) "Poor foundation
conditions" means those areas where features exist which indicate that a
natural or man-induced event may result in inadequate foundation support of the
structural components of a type II landfill.
(q) "Seismic impact zone" means an area for
which there is a 10% or greater probability that the maximum horizontal
acceleration in lithified earth material, expressed as a percentage of the
earth's gravitational pull, will be more than 0.10G in 250 years.
(r) "Structural components" means liners,
leachate collection systems, final covers, runon and runoff systems, and any
other component which is used in the construction and operation of a type II
landfill and which is necessary for the protection of human health and the
environment.
(s) "Unstable area"
means a location that is susceptible to natural or human-induced events or
forces which are capable of impairing the integrity of some or all of the
landfill structural components that are responsible for preventing releases
from a landfill. Unstable areas can include poor foundation conditions, areas
that are susceptible to mass movements, and karst terranes.
(t) "Washout" means the carrying away of
solid waste by waters of the base flood.
Notes
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