La. Admin. Code tit. 33 § V-4489

Current through Register Vol. 50, No. 9, September 20, 2024

Section V-4489 - Closure and Post-Closure

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.

La. Admin. Code tit. 33, § V-4489

Promulgated by the Department of Environmental Quality, Office of Solid and Hazardous Waste, Hazardous Waste Division, LR 10:200 (March 1984), amended LR 10:496 (July 1984), LR 18:723 (July 1992), amended by the Office of Environmental Assessment, Environmental Planning Division, LR 26:2509 (November 2000), amended by the Office of the Secretary, Legal Affairs Division, LR 31:2483 (October 2005), LR 33:2135 (October 2007), LR 34:1006 (June 2008), LR 36:2555 (November 2010).

AUTHORITY NOTE: Promulgated in accordance with R.S. 30:2001 et seq and specifically 2180.