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Virginia Administrative Code
Title 9. Environment
Agency 5. State Air Pollution Control Board
Chapter 40. Existing Stationary Sources
9/25/2020

9VAC5-40-5810. Definitions.

A. For the purpose of applying this article in the context of the Regulations for the Control and Abatement of Air Pollution and related uses, the words or terms shall have the meanings given them in subsection C of this section.

B. As used in this article, all terms not defined here shall have the meanings given them in 9VAC5 Chapter 10 (9VAC5-10), unless otherwise required by context.

C. Terms defined.

"Active collection system" means a gas collection system that uses gas mover equipment.

"Active landfill" means a landfill in which solid waste is being placed or a landfill that is planned to accept waste in the future.

"CERCLA" means the federal Comprehensive Environmental Response, Compensation and Liability Act (42 USC § 9601 et seq.).

"Closed landfill" means a landfill in which solid waste is no longer being placed, and in which no additional solid wastes will be placed without first filing a notification of modification, as prescribed under 40 CFR 60.7(a)(4), with the board. Once a notification of modification has been filed, and additional solid waste is placed in the landfill, the landfill is no longer closed.

"Closure" means that point in time when a landfill becomes a closed landfill.

"Commenced" means that an owner has undertaken a continuous program of construction or modification or that an owner has entered into a contractual obligation to undertake and complete, within a reasonable time, a continuous program of construction or modification.

"Commercial waste" means all types of solid waste generated by stores, offices, restaurants, warehouses, and other nonmanufacturing activities, excluding construction, household, and industrial wastes.

"Construction" means fabrication, erection, or installation of an affected facility.

"Controlled landfill" means any landfill at which collection and control systems are required under this article as a result of the nonmethane organic compounds emission rate. The landfill is considered controlled at the time a collection and control system design plan is submitted in compliance with 9VAC5-40-5820 C 2 a.

"Design capacity" means the maximum amount of solid waste a landfill can accept, as indicated in terms of volume or mass in the most recent permit issued by the department under Part V (9VAC20-81-400 et seq.) of the Solid Waste Management Regulations, plus any in-place waste not accounted for in the most recent permit, or as calculated using good engineering practices acceptable to the board. If the owner chooses to convert the design capacity from volume to mass or from mass to volume to demonstrate that its design capacity is less than (i) 1.0 million megagrams or 1.0 million cubic meters in the Northern Virginia Volatile Organic Compound Emissions Control Area or (ii) 2.5 million megagrams or 2.5 million cubic meters in the remaining areas of the Commonwealth, the calculation must include a site-specific density, which must be recalculated annually.

"Disposal facility" means all contiguous land and structures, other appurtenances, and improvements on the land used for the disposal of solid waste.

"Emission rate cutoff" means the threshold annual emission rate to which a landfill compares its estimated emission rate to determine if control under the regulation is required.

"Enclosed combustor" means an enclosed firebox which maintains a relatively constant limited peak temperature generally using a limited supply of combustion air. An enclosed flare is considered an enclosed combustor.

"Federal operating permit" means a permit issued under Article 1 (9VAC5-80-50 et seq.) of Part II of 9VAC5 Chapter 80.

"Flare" means an open combustor without enclosure or shroud.

"Gas mover equipment" means the equipment (i.e., fan, blower, compressor) used to transport landfill gas through the header system.

"Household waste" mean any solid waste, including garbage, trash and refuse, derived from households (including, but not limited to, single and multiple residences, hotels and motels, bunkhouses, ranger stations, crew quarters, campgrounds, picnic grounds and day-use recreational areas). For the purposes of determining capacity as required by 9VAC5-40-5820 and NMOC emission rates as required by 9VAC5-40-5860, household waste includes sanitary waste (septage) in septic tanks.

"Industrial solid waste" means any solid waste generated by manufacturing or industrial processes that is not a hazardous waste regulated under Subtitle C (42 USC § 6921 et seq.) of RCRA (as reflected in 40 CFR Parts 264 and 265) and implemented by the department in 9VAC20 Chapter 60 (9VAC20-60, Virginia Hazardous Waste Management Regulations). Such waste may include, but is not limited to, waste resulting from the following manufacturing processes: electric power generation; fertilizer and agricultural chemicals; food and related products and byproducts; inorganic chemicals; iron and steel manufacturing; leather and leather products; nonferrous metals manufacturing and foundries; organic chemicals; plastics and resins manufacturing; pulp and paper industry; rubber and miscellaneous plastic products; stone, glass, clay, and concrete products; textile manufacturing; transportation equipment; and water treatment. This term does not include mining waste or oil and gas waste.

"Interior well" means any well or similar collection component located inside the perimeter of the landfill waste. A perimeter well located outside the landfilled waste is not an interior well.

"Landfill" means an area of land or an excavation in which wastes are placed for permanent disposal, and that is not a land application unit, surface impoundment, injection well, or waste pile as those terms are defined under 9VAC20-81.

"Landfill gas" means any gas derived from the decomposition of organic waste deposited in an MSW landfill or from the evolution of volatile organic species in the waste. Emissions from MSW landfills is equivalent to landfill gas emissions.

"Lateral expansion" means a horizontal expansion of the waste boundaries of an existing MSW landfill. A lateral expansion is not a modification unless it results in an increase in the design capacity of the landfill.

"Modification" means an increase in the permitted volume design capacity of the landfill by either horizontal or vertical expansion based on its permitted design capacity as of May 30, 1991. Modification does not occur until the owner commences construction on the horizontal or vertical expansion.

"Municipal solid waste landfill" or "MSW landfill" means an entire disposal facility in a contiguous geographical space where household waste is placed in or on land. An MSW landfill may also receive other types of solid wastes regulated under Subtitle D (42 USC § 6941 et seq.) of RCRA (as reflected in 40 CFR 257.2) and implemented by the department in 9VAC20-81 (Solid Waste Management Regulations) such as commercial solid waste, nonhazardous sludge, conditionally exempt small quantity generator waste, and nonhazardous industrial solid waste. Portions of an MSW landfill may be separated by access roads. An MSW landfill may be publicly or privately owned. An MSW landfill may be a new MSW landfill, an existing MSW landfill, or a lateral expansion.

"Municipal solid waste landfill emissions" or "MSW landfill emissions" means gas generated by the decomposition of organic waste deposited in an MSW landfill or derived from the evolution of organic compounds in the waste.

"NMOC" means nonmethane organic compounds, as measured according to the provisions of 9VAC5-40-5860 B through E.

"Nondegradable waste" means any waste that does not decompose through chemical breakdown or microbiological activity. Examples include, but are not limited to, concrete, municipal waste combustor ash, and metals.

"Passive collection system" means a gas collection system that solely uses positive pressure within the landfill to move the gas rather than using gas mover equipment.

"RCRA" means the federal Resource Conservation and Recovery Act (42 USC § 6901 et seq.).

"Refuse" means trash, rubbish, garbage, and other forms of solid or liquid waste, including, but not limited to, wastes resulting from residential, agricultural, commercial, industrial, institutional, trade, construction, land clearing, forest management, and emergency operations.

"Sludge" means any solid, semi-solid, or liquid waste generated from a municipal, commercial, or industrial wastewater treatment plant, water supply treatment plant, or air pollution control facility exclusive of the treated effluent from a wastewater treatment plant.

"Solid waste" means any garbage, sludge from a wastewater treatment plant, water supply treatment plant, or air pollution control facility and other discarded material, including solid, liquid, semi-solid, or contained gaseous material resulting from industrial, commercial, mining, and agricultural operations, and from community activities, but does not include solid or dissolved material in domestic sewage, or solid or dissolved materials in irrigation return flows or industrial discharges that are point sources subject to permits under 33 USC § 1342, or source, special nuclear, or byproduct material as defined by the Atomic Energy Act of 1954 (42 USC § 2011 et seq.). For more detail, see 9VAC20-81-95 of the Solid Waste Management Regulations.

"Sufficient density" means any number, spacing, and combination of collection system components, including vertical wells, horizontal collectors, and surface collectors, necessary to maintain emission and migration control as determined by measures of performance set forth in this part.

"Sufficient extraction rate" means a rate sufficient to maintain a negative pressure at all wellheads in the collection system without causing air infiltration, including any wellheads connected to the system as a result of expansion or excess surface emissions, for the life of the blower.

Statutory Authority

§ 10.1-1308 of the Code of Virginia; §§ 110, 111, 123, 129, 171, 172, and 182 of the Clean Air Act; 40 CFR Parts 51 and 60.

Historical Notes

Derived from Volume 12, Issue 11, eff. April 1, 1996; amended, Virginia Register Volume 15, Issue 12, eff. April 1, 1999; Volume 20, Issue 08, eff. January 29, 2004; Volume 27, Issue 23, eff. August 17, 2011.

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