Current through Register Vol. 50, No. 9, September 20, 2024
A. In
the closure plan under LAC 33:V.4381.A and the post-closure plan under LAC
33:V.4391, 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 land treatment area into the groundwater;
2. control of the release of contaminated
run-off from the facility into surface water; and
3. control of the release of airborne
particulate contaminants caused by wind erosion;
4. complies with food-chain crops, LAC
33:V.4483.
B. The owner
or operator must consider at least the following factors in addressing the
closure and post-closure care objectives of LAC 33:V.4489.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 groundwater, 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 LAC 33:V.4485; 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 LAC 33:V.4489.A:
1. removal of
contaminated soils;
2. placement of
a final cover, considering:
a. functions of
the cover (e.g., infiltration control, erosion, and run-off control, and wind
erosion control);
b.
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. groundwater monitoring.
D. In addition to the requirements
of LAC 33:V.Chapter 43.Subchapter F, 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 90 days
after the last application of waste to the treatment zone;
2. maintain the run-on control system
required under LAC 33:V.2703.C;
3.
maintain the run-off management system required under LAC 33:V.2703.D;
and
4. control particulate matter
which may be subject to wind dispersal.
E. For the purpose of complying with LAC
33:V.4387, when closure is completed the owner or operator may submit to the
Office of Environmental Services certification both by the owner or operator
and by an independent, qualified soil scientist in lieu of an independent,
qualified 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 LAC
33:V.4389, 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 LAC 33:V.2709; and
4. control wind dispersal of hazardous
waste.
AUTHORITY NOTE:
Promulgated in accordance with
R.S.
30:2001 et seq and specifically
2180.
