2023 Montana Code Annotated › Title 75. Environmental Protection › Chapter 2. Air Quality › Part 1. General Provisions and Administration › 75-2-103. Definitions

75-2-103. Definitions.
Unless the context requires otherwise, in this chapter the following definitions apply:
(1) "Air contaminant" means dust, fumes, mist, smoke, other particulate matter, vapor, gas, odorous substances, or any combination of those air contaminants.
(2) "Air pollutants" means one or more air contaminants that are present in the outdoor atmosphere, including those pollutants regulated pursuant to section 7412 and Subchapter V of the federal Clean Air Act, 42 U.S.C. 7401, et seq.
(3) "Air pollution" means the presence of air pollutants in a quantity and for a duration that are or tend to be injurious to human health or welfare, animal or plant life, or property or that would unreasonably interfere with the enjoyment of life, property, or the conduct of business.
(4) "Associated supporting infrastructure" means:
(a) electric transmission and distribution facilities;
(b) pipeline facilities;
(c) aboveground ponds and reservoirs and underground storage reservoirs;
(d) rail transportation;
(e) aqueducts and diversion dams;
(f) devices or equipment associated with the delivery of an energy form or product produced at an energy development project; or
(g) other supporting infrastructure, as defined by board rule, that is necessary for an energy development project.
(5) "Board" means the board of environmental review provided for in 2-15-3502.
(6) (a) "Commercial hazardous waste incinerator" means:
(i) an incinerator that burns hazardous waste; or
(ii) a boiler or industrial furnace subject to the provisions of 75-10-406.
(b) Commercial hazardous waste incinerator does not include a research and development facility that receives federal or state research funds and that burns hazardous waste primarily to test and evaluate waste treatment remediation technologies.
(7) "Department" means the department of environmental quality provided for in 2-15-3501.
(8) "Emission" means a release into the outdoor atmosphere of air contaminants.
(9) "Energy development project" means each plant, unit, or other development and associated developments, including any associated supporting infrastructure, designed for or capable of:
(a) generating electricity;
(b) producing gas derived from coal;
(c) producing liquid hydrocarbon products;
(d) refining crude oil or natural gas;
(e) producing alcohol to be blended for ethanol-blended gasoline and that are eligible for a tax incentive pursuant to Title 15, chapter 70, part 5; or
(f) transmitting electricity through an electric transmission line with a design capacity of equal to or greater than 50 kilovolts.
(10) "Environmental protection law" means a law contained in or an administrative rule adopted pursuant to Title 75, chapter 2, 5, 10, or 11.
(11) "Hazardous waste" means:
(a) a substance defined as hazardous under 75-10-403 or defined as hazardous in department administrative rules adopted pursuant to Title 75, chapter 10, part 4; or
(b) a waste containing 2 parts or more per million of polychlorinated biphenyl (PCB).
(12) (a) "Incinerator" means any single- or multiple-chambered combustion device that burns combustible material, alone or with a supplemental fuel or with catalytic combustion assistance, primarily for the purpose of removal, destruction, disposal, or volume reduction of any portion of the input material.
(b) Incinerator does not include:
(i) safety flares used to combust or dispose of hazardous or toxic gases at industrial facilities, such as refineries, gas sweetening plants, oil and gas wells, sulfur recovery plants, or elemental phosphorus plants;
(ii) space heaters that burn used oil;
(iii) wood-fired boilers;
(iv) wood waste burners, such as tepee, wigwam, truncated cone, or silo burners;
(v) air pollution control devices required by state or federal rule or another applicable requirement; or
(vi) air pollution control devices that are:
(A) operating alone or at a facility where emissions are less than the permitting or registration threshold; and
(B) exempt from the requirements of 75-2-211 or 75-2-234.
(13) "Medical waste" means any waste that is generated in the diagnosis, treatment, or immunization of human beings or animals, in medical research on humans or animals, or in the production or testing of biologicals. The term includes:
(a) cultures and stocks of infectious agents;
(b) human pathological wastes;
(c) waste human blood or products of human blood;
(d) sharps;
(e) contaminated animal carcasses, body parts, and bedding that were known to have been exposed to infectious agents during research;
(f) laboratory wastes and wastes from autopsy or surgery that were in contact with infectious agents; and
(g) biological waste and discarded material contaminated with blood, excretion, exudates, or secretions from humans or animals.
(14) (a) "Oil or gas well facility" means a well that produces oil or natural gas. The term includes:
(i) equipment associated with the well and used for the purpose of producing, treating, separating, or storing oil, natural gas, or other liquids produced by the well; and
(ii) a group of wells under common ownership or control that produce oil or natural gas and that share common equipment used for the purpose of producing, treating, separating, or storing oil, natural gas, or other liquids produced by the wells.
(b) The equipment referred to in subsection (14)(a) includes but is not limited to wellhead assemblies, amine units, prime mover engines, phase separators, heater treater units, dehydrator units, tanks, and connecting tubing.
(c) The term does not include equipment such as compressor engines used for transmission of oil or natural gas.
(15) "Person" means an individual, a partnership, a firm, an association, a municipality, a public or private corporation, the state or a subdivision or agency of the state, a trust, an estate, an interstate body, the federal government or an agency of the federal government, or any other legal entity and includes persons resident in Canada.
(16) "Principal" means a principal of a corporation, including but not limited to a partner, associate, officer, parent corporation, or subsidiary corporation.
(17) "Small business stationary source" means a stationary source that:
(a) is owned or operated by a person who employs 100 or fewer individuals;
(b) is a small business concern as defined in the Small Business Act, 15 U.S.C. 631, et seq.;
(c) is not a major stationary source as defined in Subchapter V of the federal Clean Air Act, 42 U.S.C. 7661, et seq.;
(d) emits less than 50 tons per year of an air pollutant;
(e) emits less than a total of 75 tons per year of all air pollutants combined; and
(f) is not excluded from this definition under 75-2-108(3).
(18) (a) "Solid waste" means all putrescible and nonputrescible solid, semisolid, liquid, or gaseous wastes, including but not limited to garbage; rubbish; refuse; ashes; swill; food wastes; commercial or industrial wastes; medical waste; sludge from sewage treatment plants, water supply treatment plants, or air pollution control facilities; construction, demolition, or salvage wastes; dead animals, dead animal parts, offal, animal droppings, or litter; discarded home and industrial appliances; automobile bodies, tires, interiors, or parts thereof; wood products or wood byproducts and inert materials; styrofoam and other plastics; rubber materials; asphalt shingles; tarpaper; electrical equipment, transformers, or insulated wire; oil or petroleum products or oil or petroleum products and inert materials; treated lumber and timbers; and pathogenic or infectious waste.
(b) Solid waste does not include municipal sewage, industrial wastewater effluents, mining wastes regulated under the mining and reclamation laws administered by the department of environmental quality, or slash and forest debris regulated under laws administered by the department of natural resources and conservation.
History: En. Sec. 3, Ch. 313, L. 1967; amd. Sec. 13, Ch. 349, L. 1974; amd. Sec. 1, Ch. 308, L. 1977; R.C.M. 1947, 69-3906; amd. Sec. 1, Ch. 129, L. 1993; amd. Sec. 1, Ch. 502, L. 1993; amd. Sec. 1, Ch. 639, L. 1993; amd. Sec. 178, Ch. 418, L. 1995; amd. Secs. 523, 568, Ch. 546, L. 1995; amd. Sec. 1, Ch. 236, L. 2005; amd. Sec. 4, Ch. 445, L. 2009; amd. Sec. 1, Ch. 417, L. 2013; amd. Sec. 34, Ch. 3, L. 2019; amd. Sec. 2, Ch. 409, L. 2021; amd. Sec. 60, Ch. 503, L. 2021; amd. Sec. 1, Ch. 142, L. 2023.