La. Admin. Code tit. 33 § V-2303

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

Section V-2303 - Design and Operating Requirements

A. A waste pile (except for the portion of the waste pile in operation prior to date of issuance of the hazardous waste permit) must have:

1. a synthetic liner that is designed, constructed, and installed to prevent any migration of wastes out of the pile into the adjacent subsurface soil, or groundwater or surface water at any time during the active life (including the closure period) of the waste pile. The liner may be constructed of materials that may allow waste to migrate into the liner itself (but not into the adjacent subsurface soil or, groundwater or surface water) during the active life of the facility. The liner must be:

a. constructed of materials that have appropriate chemical properties and sufficient strength and thickness to prevent failure due to pressure gradients (including static head and external hydrogeologic forces), physical contact with the waste or leachate to which they are exposed, climatic conditions, the stress of installation, and the stress of daily operations;

b. placed upon a foundation or base capable of providing support to the liner and resistant to pressure gradients above and below the liner in order to prevent failure of the liner due to settlement, compression, or uplift; and

c. installed to cover all surrounding earth likely to be in contact with the waste or leachate; and

2. a leachate collection and removal system immediately above the liner that is designed, constructed, maintained, and operated to collect and remove leachate from the pile. The administrative authority will specify design and operating conditions in the permit to ensure that the leachate depth over the liner does not exceed 30 centimeters (1 foot). The leachate collection and removal system must be constructed of materials that are:

a. chemically resistant to the waste managed in the pile and the leachate expected to be generated;

b. of sufficient strength and thickness to prevent collapse under the pressures exerted by overlying wastes, waste cover materials, and any equipment used at the pile; and

c. designed and operated to function without clogging through the scheduled closure of the waste pile.

B. The owner or operator may be exempted from the requirements of LAC 33:V.2303.A if the administrative authority finds, based on a demonstration by the owner or operator, that alternate design and operating practices, together with location characteristics, will prevent the migration of any hazardous constituents into the groundwater or surface water at any future time. In deciding whether to grant an exemption, the administrative authority will consider:

1. the nature and quantity of the wastes;

2. the proposed alternate design and operation;

3. the hydrogeologic setting of the facility, including attenuating capacity and thickness of the liners and soils present between the pile, and groundwater or surface water; and

4. all other factors which would influence the quality and mobility of the leachate produced and the potential for it to migrate to groundwater or surface water.

C. The owner or operator of each new waste pile unit, each lateral expansion of a waste pile unit, and each replacement of an existing waste pile unit must install two or more liners and a leachate collection and removal system above and between such liners.

1. The liner system must include:

a. a top liner designed and constructed of materials (e.g., a geomembrane) to prevent the migration of hazardous constituents into such liner during the active life and post-closure care period; and

b. a composite bottom liner consisting of at least two components. The upper component must be designed and constructed of materials (e.g., a geomembrane) to prevent the migration of hazardous constituents into such component during the active life and post-closure care period. The lower component must be designed and constructed of materials to minimize the migration of hazardous constituents if a breach in the upper component were to occur. The lower component must be constructed of at least 3 feet (91 cm) of compacted soil material with a hydraulic conductivity of no more than 1 x 10^-7 cm/sec. The administrative authority may require additional liner design requirements based on the location of the waste pile in relation to drinking water aquifers.

2. The liners must comply with LAC 33:V.2303.A.1.a-c.

3. The leachate collection and removal system immediately above the top liner must be designed, constructed, operated, and maintained to collect and remove leachate from the waste pile during the active life and post-closure care period. The administrative authority will specify design and operating conditions in the permit to ensure that the leachate depth over the liner does not exceed 1 foot (30 cm). The leachate collection and removal system must comply with LAC 33:V.2303.C.4.c-d.

4. The leachate collection and removal system between the liners (and immediately above the bottom composite liner in the case of multiple leachate collection and removal systems) is also a leak detection system. This leak detection system must be capable of detecting, collecting, and removing leaks of hazardous constituents at the earliest practicable time through all areas of the top liner which are likely to be exposed to waste or leachate during the active life and post-closure care period. The requirements for a leak detection system in this Section are satisfied by installation of a system that is, at a minimum:

a. constructed with a bottom slope of 2 percent or more;

b. constructed of granular drainage materials with a hydraulic conductivity of 1 x 10^-2 cm/sec or more and a thickness of 12 inches (30.5 cm) or more; or constructed of synthetic or geonet drainage materials with a transmissivity of 3 x 10^-5 m²/sec or more;

c. constructed of materials that are chemically resistant to the waste managed in the waste pile and the leachate expected to be generated and that are of sufficient strength and thickness to prevent collapse under the pressures exerted by overlying wastes, waste cover materials, and equipment used at the waste pile;

d. designed and operated to minimize clogging during the active life and post-closure care period; and

e. constructed with sumps and liquid removal methods (e.g., pumps) of sufficient size to collect and remove liquids from the sump and prevent liquids from backing up into the drainage layer. Each unit must have its own sump(s). The design of each sump and removal system must provide a method for measuring and recording the volume of liquids present in the sump and of liquids removed from the sump.

5. The owner or operator shall collect and remove pumpable liquids in the leak detection system sumps to minimize the head on the bottom liner.

6. The owner or operator of a leak detection system that is not located completely above the seasonal high water table must demonstrate that the operation of the leak detection system will not be adversely affected by the presence of groundwater.

D. The administrative authority may approve alternative design or operating practices to those specified in LAC 33:V.2303.C if the owner or operator demonstrates to the administrative authority that such design and operating practices, together with location characteristics:

1. will prevent the migration of any hazardous constituent into the groundwater or surface water at least as effectively as the liners and leachate collection and removal systems specified in LAC 33:V.2303.C; and

2. will allow detection of leaks of hazardous constituents through the top liner at least as effectively.

E. LAC 33:V.2303.C does not apply to monofills that are granted a waiver by the administrative authority in accordance with LAC 33:V.2903.L.

F. The owner or operator of any replacement waste pile unit is exempt from LAC 33:V.2303.C if:

1. the existing unit was constructed in compliance with the design standards of Section 3004(o)(1)(A)(i) and (o)(5) of the Resource Conservation and Recovery Act; and

2. there is no reason to believe that the liner is not functioning as designed.

G. The owner or operator must design, construct, operate, and maintain a run-on control system capable of preventing flow onto the active portion of the pile during peak discharge from at least a 24-hour, 25-year storm.

H. The owner or operator must design, construct, operate, and maintain a run-off management system to collect and control at least the water volume resulting from a 24-hour, 25-year storm.

I. Collection and holding facilities (e.g., tanks or basins) associated with run-on and run-off control systems must be emptied or otherwise managed expeditiously after storms to maintain design capacity of the system.

J. If the pile contains any particulate matter which may be subject to wind dispersal, the owner or operator must cover or otherwise manage the pile to control wind dispersal. Wetting of the waste pile for control of particulate matter is not allowed unless the waste pile is equipped with a leachate collection system equivalent to LAC 33:V.2303.A.2.

K. The owner or operator of a double-lined waste pile is subject to regulation under LAC 33:V.Chapter 33 and the following conditions.

1. The pile must be underlain by two liners which are designed and constructed in a manner that prevents the migration of liquids into or out of the space between the liners. Both liners must meet all the specifications of LAC 33:V.2303.A.1.

2. A leak detection system must be designed, constructed, maintained, and operated between the liners to detect any migration of liquids into the space between the liners.

3. The pile must have a leachate collection and removal system above the top liner that is designed, constructed, maintained, and operated in accordance with LAC 33:V.2303.A.2.

4. If liquid leaks into the leak detection system, the owner or operator must:

a. notify the Office of Environmental Services of the leak in writing within seven days after detecting the leak; and

b. within a period of time specified in the permit, remove accumulated liquid, repair or replace the liner which is leaking to prevent the migration of the liquids through the liner, and obtain a certification from a qualified engineer that, to the best of his knowledge and opinion, the leak has been stopped.

L. The administrative authority will specify in the permit all design and operating practices that are necessary to ensure that the requirements of this Section are satisfied.

La. Admin. Code tit. 33, § V-2303

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 20:1000 (September 1994), LR 21:266, 267 (March 1995), amended by the Office of Environmental Assessment, Environmental Planning Division, LR 26:2480 (November 2000), amended by the Office of the Secretary, Legal Affairs Division, LR 33:2111 (October 2007), LR 34:997 (June 2008).

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