Haw. Code R. § 11-265-280 - Closure and post-closure
(a) In the closure
plan under section 11-265-112 and the post-closure plan under section
11-265-118, the owner or operator must address the following objectives and
indicate how they will be achieved:
(1)
Control of the migration of hazardous waste and hazardous waste constituents
from the treated area into the ground water;
(2) Control of the release of contaminated
run-off from the facility into surface water;
(3) Control of the release of airborne
particulate contaminants caused by wind erosion; and
(4) Compliance with section 11-265-276 concerning the growth of food-chain crops.
(b) The owner or operator must consider at
least the following factors in addressing the closure and post-closure care
objectives of subsection (a):
(1) Type and
amount of hazardous waste and hazardous waste constituents applied to the land
treatment facility;
(2) The
mobility and the expected rate of migration of the hazardous waste and
hazardous waste constituents;
(3)
Site location, topography, and surrounding land use, with respect to the
potential effects of pollutant migration (e.g., proximity to ground water,
surface water and drinking water sources);
(4) Climate, including amount, frequency, and
pH of precipitation;
(5) Geological
and soil profiles and surface and subsurface hydrology of the site, and soil
characteristics, including cation exchange capacity, total organic carbon, and
pH;
(6) Unsaturated zone monitoring
information obtained under section 11-265-278; and
(7) Type, concentration, and depth of
migration of hazardous waste constituents in the soil as compared to their
background concentrations.
(c) The owner or operator must consider at
least the following methods in addressing the closure and post-closure care
objectives of subsection (a):
(1) Removal of
contaminated soils;
(2) Placement
of a final cover, considering:
(i) Functions
of the cover (e.g., infiltration control, erosion and run-off control, and wind
erosion control); and
(ii)
Characteristics of the cover, including material, final surface contours,
thickness, porosity and permeability, slope, length of run of slope, and type
of vegetation on the cover; and
(3) Monitoring of ground water.
(d) In addition to the
requirements of subchapter G, during the closure period the owner or operator
of a land treatment facility must:
(1)
Continue unsaturated zone monitoring in a manner and frequency specified in the
closure plan, except that soil pore liquid monitoring may be terminated ninety
days after the last application of waste to the treatment zone;
(2) Maintain the run-on control system
required under subsection 11-265-272(b);
(3) Maintain the run-off management system
required under subsection 11-265-272(c); and
(4) Control wind dispersal of particulate
matter which may be subject to wind dispersal.
(e) For the purpose of complying with section
11-265-115, when closure is completed the owner or operator may submit to the
director certification both by the owner or operator and by an independent
qualified soil scientist, in lieu of an independent registered professional
engineer, that the facility has been closed in accordance with the
specifications in the approved closure plan.
(f) In addition to the requirements of
section 11-265-117, during the post-closure care period the owner or operator
of a land treatment unit must:
(1) Continue
soil-core monitoring by collecting and analyzing samples in a manner and
frequency specified in the post-closure plan;
(2) Restrict access to the unit as
appropriate for its post-closure use;
(3) Assure that growth of food chain crops
complies with section 11-265-276; and
(4) Control wind dispersal of hazardous
waste.
Notes
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