18 AAC 60.320 - Fault areas, seismic impact zones, and unstable areas
(a) A new Class I
MSWLF or a lateral expansion of an existing Class I MSWLF may not be located
(1) within 200 feet of a fault visible at the
surface or shown on a published topographical or geological map, that has had
displacement in Holocene time, unless the owner or operator demonstrates that an
alternative setback distance of less than 200 feet will prevent damage to the
structural integrity of the MSWLF and will protect public health and the
environment; or
(2) in a seismic
impact zone , unless the owner or operator demonstrates that all containment
structures, including liners, leachate collection systems, and surface water
control systems, are designed to resist the maximum horizontal acceleration in
the lithified earth material for the site, as affected by site conditions, so
that the landfill will continue to control pollution.
(b) The owner or operator of a new or existing
MSWLF or a lateral expansion located in an unstable area shall demonstrate that
engineering measures have been incorporated into the MSWLF's design to ensure
that the integrity of the structural components of the MSWLF will not be
disrupted. The owner or operator shall consider, at a minimum, the following
factors to determine whether an area is unstable:
(1) known onsite or local soil conditions that
more likely than not will result in differential settling or ground failure under
static conditions during an earthquake;
(2) known onsite or local geologic or
geomorphologic features that pose a potential risk to the integrity of
containment structures; and
(3) known
onsite or local human-made surface and subsurface features or events.
Notes
Authority:AS 44.46.020
AS 46.03.010
AS 46.03.020
AS 46.03.100
AS 46.03.110
AS 46.03.800
AS 46.03.810
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