(4-5-00) 

MARCH 30, 2007 REVISIONS TO 


58.01.01 - RULES FOR THE CONTROL OF AIR POLLUTION IN IDAHO 


FOR INCLUSION IN IDAHO SIP 


006. GENERAL DEFINITIONS. 

01. Accountable. Any SIP emission trading program must account for the aggregate effect of the 

emissions trades in the demonstration ofreasonable further progress, attainment, or maintenance. (4-5-00) 

02. Act. The Environmental Protection and Health Act of 1972 as amended (Sections 39-101 through 

39-130, Idaho Code). (5-1-94) 

03. Actual Emissions. The actual rate of emissions of a pollutant from an emissions unit as 

determined in accordance with the following: (4-5-00) 

a. In general, actual emissions as of a particular date shall equal the average rate, in tons per year, at 

which the unit actually emitted the pollutant during a two-year period which precedes the particular date and which 

is representative of normal source operation. The Department shall allow the use of a different time period upon a 

determination that it is more representative of normal source operation. Actual emissions shall be calculated using 

the unit's actual operating hours, production rates, and types of materials processed, stored, or combusted during the 

selected time period. (4-5-00) 

b. The Department may presume that the source-specific allowable emissions for the unit are 

equivalent to actual emissions of the unit. (4-5-00) 

c. For any emissions unit (other than an electric utility steam generating unit as specified below) 

which has not yet begun normal operations on the particular date, actual emissions shall equal the potential to emit 

ofthe unit on that date. (4-5-00) 

d. For an electric utility steam generating unit (other than a new unit or the replacement of an 

existing unit) actual emissions of the unit following the physical or operational change shall equal the representative 

actual annual emissions ofthe unit, provided the source owner or operator maintains and submits to the Department, 

on an annual basis for a period .of five (5) years from the date the unit resumes regular operation, information 

demonstrating that the physical or operational change did not result in an emissions increase. A longer period, not to 

exceed ten (10) years may be required by the Department ifit determines such a period to be more representative of 

normal source post-change operations. (4-5-00) 

04. Adverse Impact on Visibility. Visibility impairment which interferes with the manalgeI1ttl 

protection, preservation, or enjoyment of the visitor's visual experience of the Federal Class I Area. This 

determination must be made on a case-by-case basis taking into account the geographic extent, intensity, duration, 

frequency, and time of visibility impairments, and how these factors correlate with: (3-30-07) 

a. Times of visitor use ofthe Federal Class I Area; and (3-30-07) 

b. The frequency and timing of natural conditions that reduce visibility. (3-30-07) 

c. This term does not include affects on integral vistas when applied to 40 CFR 51.307. 

05. Air Pollutant/Air Contaminant. Any substance, including but not limited to, dust, fume, gas, 

mist, odor, smoke, vapor, pollen, soot, carbon or particulate matter or any combination thereof. 

06. Air Pollution. The presence in the outdoor atmosphere of any air pollutant or combination 

thereof in such quantity of such nature and duration and under such conditions as would be injurious to human 

health or welfare, to animal or plant life, or to property, or to interfere unreasonably with the enjoyment of life or 
property. 

(4-5-00) 

07. Air Quality. The specific measurement in the ambient air of a particular air pollutant at any given 

time. (5-1-94) 

OS. Air Quality Criterion. The information used as guidelines for decisions when establishing air 

quality goals and air quality standards. (5-1-94) 

09. Allowable Emissions. The allowable emissions rate of a stationary source or facility calculated 

using the maximum rated capacity of the source or facility (unless the source or facility is subject to federally 

enforceable limits which restrict the operating rate, or hours of operation, or both) and the most stringent of the 

following: (4-5-00) 

a. The applicable standards set forth in 40 CFR part 60 and 61 ; (4-5-00) 

b. Any applicable State Implementation Plan emissions limitation including those with a future 

compliance date; or (4-5-00) 

c. The emissions rate specified as a federally enforceable permit condition, including those with a 

future compliance date. (4-5-00) 

10. Ambient Air. That portion of the atmosphere, external to buildings, to which the general public 

has access. (5-1-94) 

11. Ambient Air Quality Violation. Any ambient concentration that causes or contributes to an 

exceedance of a national ambient air quality standard as determined by 40 CFR Part 50. (4-11-06) 

12. Atmospheric Stagnation Advisory. An air pollution alert declared by the Department when air 

pollutant impacts have been observed and/or meteorological conditions are conducive to additional air pollutant 

buildup. (4-11-06) 

13. Attainment Area. Any area which is designated, pursuant to 42 U.S.C. Section 7407(d), as 

having ambient concentrations equal to or less than national primary or secondary ambient air quality standards for a 

air pollutant or air pollutants. (4-11-06) 

BART-Eligible Source. Any of the following stationary sources of air pollutants, including any 

reconstructed source, which was not in operation prior to August 7, 1962, and was in existence on August 7, 1977, 

and has the potential to emit two hundred fifty (250) tons per year or more of any air pollutant. In determining 

potential to emit, fugitive emissions, to the extent quantifiable, must be counted. (3-30-07) 

a. Fossil-fuel fired steam electric plants of more than two hundred fifty (250) million BTU's per hour 

heat input; (3-30-07) 

b. Coal cleaning plants (thermal dryers); (3-30-07) 

c. Kraft pulp mills; (3-30-07) 

d. Portland cement plants; (3-30-07) 

e. Primary zinc smelters; (3-30-07) 

f. Iron and steel mill plants; (3-30-07) 

g. Primary aluminum ore reduction plants; (3-30-07) 

2 
h. Primary copper smelters; 	 (3-30-07) 

~ i. Municipal incinerators capable of charging more than two hundred fifty (250) tons of refuse per 

day; (3-30-07) 

j. Hydrofluoric, sulfuric, and nitric acid plants; 	 (3-30-07) 

k. Petroleum refineries; 	 (3-30-07) 

I. Lime plants; 	 (3-30-07) 

m. Phosphate rock processing plants; 	 (3-30-07) 

n. Coke oven batteries; 	 (3-30-07) 

o. Sulfur recovery plants; 	 (3-30-07) 

p. Carbon black plants (furnace process); 	 (3-30-07) 

q. Primary lead smelters; 	 (3-30-07) 

r. Fuel conversion plants; 	 (3-30-07) 

s. Sintering plants; 	 (3-30-07) 

t. Secondary metal production facilities; 	 (3-30-07) 

u. Chemical process plants; 	 (3-30-07) 

v. 	 Fossil-fuel boilers ofmore than two hundred fifty (250) million BTU's per hour heat input; 

(3-30-07) 

w. Petroleum storage and transfer facilities with a capacity exceeding three hundred thousand 

(300,000) barrels; (3-30-07) 

x. Taconite ore processing facilities; 	 (3-30-07) 

y. Glass fiber processing plants; and 	 (3-30-07) 

z. Charcoal production facilities. 	 (3-30-07) 

15. Baseline (Area, Concentration, Date). See Section 579. 	 (5-1-94) 

16. Best Available Retrofit Technology (BART). Means an emission limitation based on the degree 

of reduction achievable through the application of the best system of continuous emission reduction for each 

pollutant which is emitted by an existing stationary facility. The emission limitation must be established, on a caseby-case basis, taking into consideration the technology available, the costs of compliance, the energy and non-air 

quality environmental impacts of compliance, any pollution control equipment in use or in existence at the source, 

;:;degree of improvement in visibility which may reasonably be 

17. Board. Idaho Board of Environmental Quality. 	 (5-1-94) 

18. Breakdown. An unplanned failure of any equipment or emissions unit which may cause excess 

emissions. (4-5-00) 

3 

19. BTU. British thermal unit. 	 (5-1-94) 

20. Clean Air Act. The federal Clean Air Act, 42 U.S.C. Sections 7401 through 7671q. (5-1-94) 

21. Collection Efficiency. The overall performance of the air cleaning device in terms of ratio of 

materials collected to total input to the collector unless specific size fractions of the contaminant are stated or 

required. (5-1-94) 

22. Commence Construction or Modification. In general, this means initiation of physical on-site 

construction activities on an emissions unit which are of a permanent nature. Such activities include, but are not 

limited to, installation of building supports and foundations, laying of underground pipework, and construction of 

permanent storage structures. With respect to a change in method of operation, this term refers to those on-site 

activities, other than preparatory activities, which mark the initiation of the change. (4-5-00) 

23. Complete. A determination made by the Department that all information needed to process a 

permit application has been submitted for review. (5-1-94) 

24. 	 Construction. Fabrication, erection, installation, or modification of a stationary source or facility. 

(5-1-94) 

25. Control Equipment. Any method, process or equipment which removes, reduces or renders less 

noxious, air pollutants discharged into the atmosphere. (5-1-94) 

26. Controlled Emission. An emission which has been treated by control equipment to remove all or 

part ofan air pollutant before release to the atmosphere. (5-1-94) 

27. Criteria Air Pollutant. Any of the following: PM-I0; sulfur oxides; ozone, nitrogen dioxide; 

carbon monoxide; lead. (4-5-00) .J 

Deciview. A measurement of visibility impairment. A deciview is a haze index derived from 

calculated light extinction, such that uniform changes in haziness correspond to uniform incremental changes in 

perception across the entire range of conditions, from pristine to highly impaired. The deciview haze index is 

calculated based on the following equation (for the purposes of calculating deciview, the atmospheric lif!tt 

extinction coefficient must be calculated from aerosol measurements): Deciview Haze Index 10 In., (bex! 1l0Mm' ) 

~.. bex! the atmospheric light extinction coefficient, expressed in inverse megameters (Mm'I). (3-30-07) 

Department. The Department ofEnvironmental Quality. 	 (5-1-94) 

30. Designated Facility. Any ofthe following facilities: 	 (5-1-94) 

a. Fossil-fuel fired steam electric plants of more than two hundred fifty (250) million BTU's per hour 

heat input; (5-1-94) 

b. Coal cleaning plants (thermal dryers); 	 (5-1-94) 

c. Kraft pulp mills; 	 (5-1-94) 

d. Portland cement plants; 	 (5-1-94) 

e. Primary zinc smelters; 	 (5-1-94) 

r. Iron and steel mill plants; 	 (5-1-94) 

g. Primary aluminum ore reduction plants; 	 (5-1-94) 

h. Primary copper smelters; 	 (5-1-94) 

4 
i. Municipal incinerators capable of charging more than two hundred and fifty (250) tons of refuse 

per day; (5-1-94) 

j. Hydrofluoric, sulfuric, and nitric acid plants; (5-1-94) 

k. Petroleum refineries; (5-1-94) 

I. Lime plants; (5-1-94) 

m. Phosphate rock processing plants; (5-1-94) 

n. Coke oven batteries; (5-1-94) 

o. Sulfur recovery plants; (5-1-94) 

p. Carbon black plants (furnace process); (5-1-94) 

q. Primary lead smelters; (5-1-94) 

r. Fuel conversion plants; (5-1-94) 

s. Sintering plants; (5-1-94) 

t. Secondary metal production facilities; (5-1-94) 

u. Chemical process plants; (5-1-94) 

v. Fossil-fuel boilers (or combination thereof) of more than two hundred and fifty (250) million 

BTU's per hour heat input; (5-1-94) 

w. Petroleum storage and transfer facilities with a capacity exceeding three hundred thousand 

(300,000) barrels; (5-1-94) 

x. Taconite ore processing facilities; (5-1-94) 

y. Glass fiber processing plants; and (5-1-94) 

z. Charcoal production facilities. (5-1-94) 

31. Director. The Director ofthe Department of Environmental Quality or his designee. (5-1-94) 

32. Effective Dose Equivalent. The sum of the products of absorbed dose and appropriate factors to 

account for differences in biological effectiveness due to the quality of radiation and its distribution in the body of 

reference man. The unit ofthe effective dose equivalent is the rem. It is generally calculated as an annual dose. 

(5-1-94) 

33. Emission. Any controlled or uncontrolled release or discharge into the outdoor atmosphere of any 

air pollutants or combination thereof. Emission also includes any release or discharge of any air pollutant from a 

stack, vent, or other means into the outdoor atmosphere that originates from an emission unit. (5-1-94) 

34. Emission Standard. A permit or regulatory requirement established by the Department or EPA 

which limits the quantity, rate, or concentration of emissions of air pollutants on a continuous basis, including any 

requirements which limit the level of opacity, prescribe equipment, set fuel specifications, or prescribe operation or 

maintenance procedures for a source to assure continuous emission reduction. (4-5-00) 

5 
35. Emissions Unit. An identifiable piece of process equipment or other part of a facility which emits 

or may emit any air pollutant. This defmition does not alter or affect the term "unit" for the purposes of 42 U.S.C. 

Sections 7651 through 76510. (5-1-94) 

36. 	 EPA. The United States Environmental Protection Agency and its Administrator or designee. 

(5-1-94) 

37. Environmental Remediation Source. A stationary source that functions to remediate or recover 

any release, spill, leak, discharge or disposal of any petroleum product or petroleum substance, any hazardous waste 

or hazardous substance from any soil, ground water or surface water, and shall have an operational life no greater 

than five (5) years from the inception of any operations to the cessation of actual operations. Nothing in this 

definition shall be construed so as to actually limit remediation projects to five (5) years or less oftotal operation. 

(5-1-95) 

38. Excess Emissions. Emissions that exceed an applicable emissions standard established for any 

facility, source or emissions unit by statute, regulation, mle, permit, or order. (4-11-06) 

39. Existing Stationary Source or Facility. Any stationary source or facility that exists, is installed, 

or is under construction on the original effective date ofany applicable provision of this chapter. (5-1-94) 

40. Facility. All of the pollutant-emitting activities which belong to the same industrial grouping, are 

located on one (I) or more contiguous or adjacent properties, and are under the control of the same person (or 

persons under common control). Pollutant-emitting activities shall be considered as part of the same industrial 

grouping if they belong to the same Major Group (i.e. which have the same two-digit code) as described in the 

Standard Industrial Classification Manual. The fugitive emissions shall not be considered in determining whether a 

permit is required unless required by federal law. (4-11-06) 

Federal Class I Area. Any federal land that is classified or reclassified "Class I." (3-30-07) 

Federal Land Manager. The Secretary of the department with authority over the Federal Class I 

Secretary's designee). (3-30-07) 

43. Federally Enforceable. All limitations and conditions which are enforceable by EPA and the 

Department under the Clean Air Act, including those requirements developed pursuant to 40 CFR Parts 60 and 61 

requirements within any applicable State Implementation Plan, and any permit requirements established pursuant to 

40 CFR 52.21 or under regulations approved pursuant to 40 CFR Parts 51, 52, 60, or 63. (3-30-07) 

44. Fire Hazard. The presence or accumulation of combustible material of such nature and in 

sufficient quantity that its continued existence constitutes an imminent and substantial danger to life, property, 

public welfare or adjacent lands. (5-1-94) 

45. Fuel-Burning Equipment. Any furnace, boiler, apparatus, stack and all appurtenances thereto, 

used in the process ofburning fuel for the primary purpose ofproducing heat or power by indirect heat transfer. 

(5-1-94) 

46. Fugitive Dust. Fugitive emissions composed of particulate matter. 	 (5-1-94) 

47. Fugitive Emissions. Those emissions which could not reasonably pass through a stack, chimney, 

vent, or other functionally equivalent opening. (5-1-94) 

48. Garbage. Any waste consisting of putrescible animal and vegetable materials resulting from the 

handling, preparation, cooking and consumption of food including, but not limited to, waste materials from 

households, markets, storage facilities, handling and sale of produce and other food products. (5-1-94) 

49. Grain Elevator. Any plant or installation at which grain is unloaded, handled, cleaned, dried, 

stored, or loaded. (5-1-94) 

6 
50. Grain Storage Elevator. Any grain elevator located at any wheat flour mill, wet com mill, dry 

com mill (human consumption), rice mill, or soybean extraction plant which has a permanent grain storage capacity 

ofthirty five thousand two hundred (35,200) cubic meters (ca. 1 million bushels). (5~1~94) 

51. Grain Terminal Elevator. Any grain elevator which has a permanent storage capacity of more 

than eighty-eight thousand one hundred (88,lOO) cubic meters (ca. 2.5 million bushels), except those located at 

animal food manufacturers, pet food manufacturers, cereal manufacturers, breweries, and livestock feedlots. (5-1-94) 

52. Hazardous Air Pollutant (HAP). Any air pollutant listed pursuant to Section 112(b) of the 

Clean Air Act. Hazardous Air Pollutants are regulated air pollutants. (4-11~06) 

53. Hazardous Waste. Any waste or combination of wastes ofa solid, liquid, semisolid, or contained 

gaseous form which, because of its quantity, concentration or characteristics (physical, chemical or biological) may: 

(5-1-94) 

a. Cause or significantly contribute to an increase in deaths or an increase in serious, irreversible, or 

incapacitating reversible illnesses; or (5-1-94) 

b. Pose a substantial threat to human health or to the environment if improperly treated, stored, 

disposed of, or managed. Such wastes include, but are not limited to, materials which are toxic, corrosive, ignitable, 

or reactive, or materials which may have mutagenic, teratogenic, or carcinogenic properties; provided that such 

wastes do not include solid or dissolved material in domestic sewage, or solid or dissolved materials in irrigation 

return flows or industrial discharges which are allowed under a national pollution discharge elimination system 

permit, or source, special nuclear, or by-product material as defined by 42 U.S.C. Sections 20 14(e),(z) or (aa). 

(5-1-94) 

54. Hot-Mix Asphalt Plant. Those facilities conveying proportioned quantities or batch loading of 

cold aggregate to a drier, and heating, drying, screening, classifYing, measuring and mixing the aggregate and 

asphalt for the purpose of paving, construction, industrial, residential or commercial use. (5 -I ~94) 

55. Incinerator. Any source consisting of a furnace and all appurtenances thereto designed for the 

destruction of refuse by burning. "Open Burning" is not considered incineration. For purposes of these rules, the 

destruction of any combustible liquid or gaseous material by burning in a flare stack shall be considered 

incineration. (5-1-94) 

56. Indian Governing Body. The governing body of any tribe, band, or group of Indians subject to 

the jurisdiction ofthe United States and recognized by the United States as possessing power ofself-government. 

(5~1-94) 

57. Integral Vista. A view perceived from within the mandatory Class I Federal Area of a specific 

landmark or panorama located outside the boundary ofthe mandatory Class I Federal Area. (3~30-07) 

58. Kraft Pulping. Any pulping process which uses, for a cooking liquor, an alkaline sulfide solution 

containing sodium hydroxide and sodium sulfide. (5-1-94) 

~59. Least Impaired Days. The average visibility impairment (measured in deciviews) for the twenty 

p~20%) of monitored days in a calendar year with the lowest amount of visibility impairment. (3-30~07) 

60. Lowest Achievable Emission Rate (LAER). For any source, the more stringent rate of 

emissions based on the following: (4~5-00) 

a. The most stringent emissions limitation which is contained in any State Implementation Plan for 

such class or category of facility, unless the owner or operator of the proposed facility demonstrates that such 

limitations are not achievable; or (4~5-00) 

7 
b. The most stringent emissions limitation which is achieved in practice by such class or category of 

facilities. This limitation, when applied to a modification, means the lowest achievable emissions rate for the new or 

modified emissions units within the facility. In no event shall the application of the term permit a proposed new or 

modified facility to emit any pollutant in excess ofthe amount allowable under an applicable new source standard of 

performance. (4-5-00) 

_ 61. Mandatory Class I Federal Area. Any area identified in 40 CFR 81.400 through 81.437. 

(3-30-07) 

62. Member of the Public. For purposes of Subsection 006.103.a.xvi., a person located at any offsite point where there is a residence, school, business or office. (3-30-07) 

63. Modification. (4-11-06) 

a. Any physical change in, or change in the method of operation of, a stationary source or facility 

which results in an emission increase as defined in Section 007 or which results in the emission of any regulated air 

pollutant not previously emitted. (4-11-06) 

b. Any physical change in, or change in the method of operation of, a stationary source or facility 

which results in an increase in the emissions rate of any state only toxic air pollutant, or emissions of any state only 

toxic air pollutant not previously emitted. ( 4-11-06) 

c. Fugitive emissions shall not be considered in determining whether a permit is required for a 

modification unless required by federal law. (4-11-06) 

d. For purposes of this defmition of modification, routine maintenance, repair and replacement shall 

not be considered physical changes and the following shall not be considered a change in the method of operation: 

(3-30-07) 

i. An increase in the production rate if such increase does not exceed the operating design capacity 

of the affected stationary source, and ifa more restrictive production rate is not specified in a permit; (5-1-94) 

ii. An increase in hours of operation if more restrictive hours of operation are not specified in a 

permit; and (5-1-94) 

Ill. Use of an alternative fuel or raw material if the stationary source is specifically designed to 

accommodate such fuel or raw material and use of such fuel or raw material is not specifically prohibited in a 

permit. (4-5-00) 

64. Monitoring. Sampling and analysis, in a continuous or noncontinuous sequence, using techniques 

which will adequately measure emission levels and/or ambient air concentrations of air pollutants. (5-1-94) 

__ 65. Most Impaired Days. The average visibility impairment (measured in deciviews) for the twenty 

percent (20%) of monitored days in a calendar year with the highest amount of visibility impairment. (3-30-07) 

66. Multiple Chamber Incinerator. Any article, machine, equipment, contrivance, structure or part 

of a structure used to dispose of combustible refuse by burning, consisting of three (3) or more refractory lined 

combustion furnaces in series physically separated by refractory walls, interconnected by gas passage ports or ducts 

and employing adequate parameters necessary for maximum combustion of the material to be burned. (5-1-94) 

.-.. 67. Natural Conditions. Includes naturally occurring phenomena that reduce visibility as measured 

~sof light extinction, visual range, contrast, or coloration. (3-30-07) 

68. New Stationary Source or Facility. (5-1-94) 

a. Any stationary source or facility, the construction or modification of which is commenced after 

8 
the original effective date of any applicable provision of this chapter; or 	 (5-1-94) 

b. 	 The restart of a nonoperating facility shall be considered a new stationary source or facility if: 

(5-1-94) 

i. The restart involves a modification to the facility; or 	 (5-1-94) 

ii. After the facility has been in a nonoperating status for a period of two (2) years, and the 

Department receives an application for a Permit to Construct in the area affected by the existing nonoperating 

facility, the Department will, within five (5) working days of receipt of the application notify the nonoperating 

facility of receipt of the application for a Permit to Construct. Upon receipt of this Departmental notification, the 

nonoperating facility will comply with the following restart schedule or be considered a new stationary source or 

facility when it does restart: Within thirty (30) working days after receipt of the Department's notification of the 

application for a Permit to Construct, the nonoperating facility shall provide the Department with a schedule 

detailing the restart of the facility. The restart must begin within sixty (60) days of the date the Department receives 

the restart schedule. (5-1-94) 

69. Nonattainment Area. Any area which is designated, pursuant to 42 U.S.C. Section 7407(d), as 

not meeting (or contributes to ambient air quality in a nearby area that does not meet) the national primary or 

secondary ambient air quality standard for the pollutant. (5-1-94) 

70. Noncondensibles. Gases and vapors from processes that are not condensed at standard 

temperature and pressure unless otherwise specified. (5-1-94) 

71. Odor. The sensation resulting from stimulation of the human sense of smell. 	 (5-1-94) 

72. Opacity. A state which renders material partially or wholly impervious to rays of light and causes 

obstruction of an observer's view, expressed as percent. (5-1-94) 

73. Open Burning. The burning of any matter in such a manner that the products of combustion 

resulting from the burning are emitted directly into the ambient air without passing through a stack, duct or chimney. 

(5-1-94) 

74. Operating Permit. A permit issued by the Director pursuant to Sections 300 through 386 and/or 

400 through 461. (4-5-00) 

75. Particulate Matter. Any material, except water in uncombined form, that exists as a liquid or a 

solid at standard conditions. (5-1-94) 

76. Particulate Matter Emissions. All particulate matter emitted to the ambient air as measured by 

an applicable reference method, or any equivalent or alternative method in accordance with Section 157. (4-5-00) 

77. 	 Permit to Construct. A permit issued by the Director pursuant to Sections 200 through 228. 

(7-1-02) 

78. Person. Any individual, association, corporation, firm, partnership or any federal, state or local 

governmental entity. (5-1-94) 

79. PM-tO. All particulate matter in the ambient air with an aerodynamic diameter less than or equal 

to a nominal ten (10) micrometers as measured by a reference method based on Appendix J of 40 CFR Part 50 and 

designated in accordance with 40 CFR Part 53 or by an equivalent method designated in accordance with 40 CFR 

Part 53. (5-1-94) 

80. PM-tO Emissions. All particulate matter, including condensible particulates, with an 

aerodynamic diameter less than or equal to a nominal ten (10) micrometers emitted to the ambient air as measured 

by an applicable reference method, or an equivalent or alternative method in accordance with Section 157. (4-5-00) 

9 
81. Potential to EmitIPotential Emissions. The maximum capacity of a facility or stationary source 

to emit an air pollutant under its physical and operational design. Any physical or operational limitation on the 

capacity of the facility or source to emit an air pollutant, including air pollution control equipment and restrictions 

on hours of operation or on the type or amount of material combusted, stored or processed, shall be treated as part of 

its design if the limitation or the effect it would have on emissions is state or federally enforceable. Secondary 

emissions do not count in determining the potential to emit ofa facility or stationary source. (3-30-07) 

82. Portable Equipment. Equipment which is designed to be dismantled and transported from one 

(1) job site to another job site. 	 (5-1-94) 

83. 	 PPM (parts per million). Parts of a gaseous contaminant per million parts of gas by volume. 

(5-1-94) 

84. Prescribed Fire Management Burning. The controlled application of fire to wildland fuels in 

either their natural or modified state under such conditions of weather, fuel moisture, soil moisture, etc., as will 

allow the fife to be confined to a predetermined area and at the same time produce the intensity of heat and rate of 

spread required to accomplish planned objectives, including: (5-1-94) 

a. Fire hazard reduction; 	 (5-1-94) 

b. The control of pests, insects, or diseases; 	 (5-1-94) 

c. The promotion ofrange forage improvements; 	 (5-1-94) 

d. The perpetuation of natural ecosystems; 	 (5-1 -94) 

e. The disposal of woody debris resulting from a logging operation, the clearing of rights of way, a 

land clearing operation, or a driftwood collection system; (5-1 -94) 

f. The preparation ofplanting and seeding sites for forest regeneration; and 	 (5-1-94) 

g. Other accepted natural resource management purposes. 	 (5-1-94) 

85. Primary Ambient Air Quality Standard. That ambient air quality which, allowing an adequate 

margin of safety, is requisite to protect the public health. (5-1-94) 

86. Process or Process Equipment. Any equipment, device or contrivance for changing any 

materials whatever or for storage or handling of any materials, and all appurtenances thereto, including ducts, stack, 

etc., the use of which may cause any discharge of an air pollutant into the ambient air but not including that 

equipment specifically defined as fuel-burning equipment or refuse-burning equipment. (5-1-94) 

87. Process Weight. The total weight of all materials introduced into any source operation which 

may cause any emissions of particulate matter. Process weight includes solid fuels charged, but does not include 

liquid and gaseous fuels charged or combustion air. Water which occurs naturally in the feed material shall be 

considered part of the process weight. (5-1-94) 

88. Process Weight Rate. The rate established as follows: 	 (5-1-94) 

a. For continuous or long-run steady-state source operations, the total process weight for the entire 

period of continuous operation or for a typical portion thereof, divided by the number of hours of such period or 

portion thereof; (4-5-00) 

b. For cyclical or batch source operations, the total process weight for a period that covers a 

complete cycle ofoperation or an integral number of cycles, divided by the hours of actual process operation during 

such a period. Where the nature of any process or operation or the design of any equipment is such as to permit more 

10 
than one (I) interpretation of this definition, the interpretation that results in the minimum value for allowable 

emission shall apply. (4-5-00) 

89. Quantifiable. The Department must be able to determine the emissions impact of any SIP trading 

programs requirement(s) or emission limit(s). (4-5-00) 

90. Radionuclide. A type of atom which spontaneously undergoes radioactive decay. 	 (5-1-94) 

Regional Haze. Visibility impairment that is caused by the emission of air pollutants from 

sources located over a wide geographic area. Such sources include, but are not limited to, major and 

stationary sources, mobile sources, and area sources. (3-30-07) 

Regulated Air Pollutant. 	 (4-11-06) 

a. For purposes of determining applicability of major source permit to operate requirements, issuing, 

and modifying permits pursuant to Sections 300 through 397, and in accordance with Title V of the federal Clean 

Air Act amendments of 1990,42 U.S.C. Section 7661 et seq., "regulated air pollutant" shall have the same meaning 

as in Title V of the federal Clean Air Act amendments of 1990, and any applicable federal regulations promulgated 

pursuant to Title V ofthe federal Clean Air Act amendments of 1990, 40 CFR Part 70; (4-11-06) 

b. For purposes of determining applicability of any other operating permit requirements, issuing, and 

modifying permits pursuant to Sections 400 through 410, the federal definition of "regulated air pollutant" as 

defined in Subsection 006.94.a. shall also apply; (3-30-07) 

c. For purposes of determining applicability of permit to construct requirements, issuing, and 

modifying permits pursuant to Sections 200 through 228, except Section 214, and in accordance with Part D of 

Subchapter I of the federal Clean Air Act, 42 U.S.C. Section 7501 et seq., "regulated air pollutant" shall mean those 

air contaminants that are regulated in non-attainment areas pursuant to Part D of Subchapter I of the federal Clean 

Air Act and applicable federal regulations promulgated pursuant to Part D of Subchapter I of the federal Clean Air 

Act, 40 CFR 51.165; and (4-11-06) 

d. For purposes of determining applicability of any other major or minor permit to construct 

requirements, issuing, and modifying permits pursuant to 200 through 228, except Section 214, "regulated air 

pollutant" shall mean those air contaminants that are regulated in attainment and unclassifiable areas pursuant to 

Part C of Subchapter I of the federal Clean Air Act, 40 CFR 52.21, and any applicable federal regulations 

promulgated pursuant to Part C ofSubchapter I ofthe federal Clean Air Act, 42 U.S.C. Section 7470 et seq.(4-11-06) 

93. Replicable. Any SIP procedures for applying emission trading shall be structured so that two (2) 

independent entities would obtain the same result when determining compliance with the emission trading 

provisions. (4-5-00) 

94. Responsible Official. One (I) ofthe following: 	 (5-1-94) 

a. For a corporation: a president, secretary, treasurer, or vice-president of the corporation in charge 

of a principal business function, or any other person who performs similar policy or decision-making functions for 

the corporation, or a duly authorized representative ofsuch person ifthe representative is responsible for the overall 

operation of one (I) or more manufacturing, production, or operating facilities applying for or subject to a permit 

and either: (5-1-94) 

i. The facilities employ more than two hundred fifty (250) persons or have gross annual sales or 

expenditures exceeding twenty-five million dollars ($25,000,000) (in second quarter 1980 dollars); or (4-5-00) 

ii. 	 The delegation of authority to such representative is approved in advance by the Department. 

(5-1-94) 

b. For a partnership or sole proprietorship: a general partner or the proprietor, respectively. 	 (5-1-94) 

It 
c. For a municipality, State, Federal, or other public agency: either a principal executive officer or 

ranking elected official. For the purposes of Section 123, a principal executive officer of a Federal agency includes 

the chief executive officer having responsibility for the overall operations of a principal geographic unit of the 

agency (e.g., a Regional Administrator ofEPA). (4-5-00) 

d. For Phase II sources: (5-1-94) 

i. The designated representative in so far as actions, standards, requirements, or prohibitions under 

42 U.S.C. Sections 7651 through 76510 or the regulations promulgated thereunder are concerned; and (5-1-94) 

ii. The designated representative for any other purposes under 40 CFR Part 70. (5-1-~a) 

95. Safety Measure. Any shutdown (and related startup) or bypass of equipment or processes 

undertaken to prevent imminent injury or death or severe damage to equipment or property which may cause excess 

emissions. (4-5-00) 

96. Salvage Operation. Any source consisting of any business, trade or industry engaged in whole or 

in part in salvaging or reclaiming any product or material, such as, but not limited to, reprocessing of used motor 

oils, metals, chemicals, shipping containers, or drums, and specifically including automobile graveyards and 

junkyards. (5-1-94) 

97. Scheduled Maintenance. Planned upkeep, repair activities and preventative maintenance on any 

air pollution control equipment or emissions unit, including process equipment, and including shutdown and startup 

of such equipment. (3-20-97) 

98. Secondary Ambient Air Quality Standard. That ambient air quality which is requisite to 

protect the public welfare from any known or anticipated adverse effects associated with the presence of air . j 

pollutants in the ambient air. (5-1-94) ""'" 

99. Secondary Emissions. Emissions which would occur as a result of the construction, 

modification, or operation of a stationary source or facility, but do not come from the stationary source or facility 

itself. Secondary emissions must be specific, well defined, quantifiable, and affect the same general area as the 

stationary source, facility, or modification which causes the secondary emissions. Secondary emissions include 

emissions from any offsite support facility which would not be constructed or increase its emissions except as a 

result ofthe construction or operation of the primary stationary source, facility or modification. Secondary emissions 

do not include any emissions which come directly from a mobile source regulated under 42 U.S.c. Sections 7521 

through 7590. (3-30-07) 

tOO. Shutdown. The normal and customary time period required to cease operations of air pollution 

control equipment or an emissions unit beginning with the initiation of procedures to terminate normal operation and 

continuing until the termination is completed. (5-1-94) 

tOt. Significant. In reference to a net emissions increase or the potential ofa source to emit any of the 

following pollutants, a rate of emissions that would equal or exceed any of the following: (4-11-06) 

a. Pollutant and emissions rate: (4-11-06) 

i. Carbon monoxide, one hundred (l00) tons per year; (5-1-94) 

ii. Nitrogen oxides, forty (40) tons per year; (5-1-94) 

iii. Sulfur dioxide, forty (40) tons per year; (5-1-94) 

iv. Particulate matter, twenty-five (25) tons per year of particulate matter emissions; fifteen (15) tons 

per year ofPMIO emissions; (4-11-06) 

12 
v. Ozone, forty (40) tons per year of volatile organic compounds; 	 (4-11-06) ....... 
 vi. Lead, six-tenths (0.6) of a ton per year; (5-1-94) 

vii. Fluorides, three (3) tons per year; (5-1-94) 

viii. Sulfuric acid mist, seven (7) tons per year; (5-1-94) 

ix. Hydrogen sulfide (H2S), ten (10) tons per year; (5-1-94) 

x. Total reduced sulfur (including H2S), ten (10) tons per year; (5-1-94) 

xi. Reduced sulfur compounds (including H2S), ten (10) tons per year; (5-1-94) 

xii. Municipal waste combustor organics (measured as total tetra- through octa-chlorinated dibenzo-pdioxins and dibenzofurans), thirty-five ten-millionths (0.0000035) tons per year; (5-1-94) 

xiii. 	 Municipal waste combustor metals (measured as particulate matter), fifteen (15) tons per year; 

(5-1-94) 

xiv. Municipal waste combustor acid gases (measured as sulfur dioxide and hydrogen chloride), forty 

(40) tons per year; 	 (5-1-94) 

xv. Municipal solid waste landfill emissions (measured as nonmethane organic compounds), fifty (50) 

tons per year; or (4-11-06) 

xvi. Radionuclides, a quantity of emissions, from source categories regulated by 40 CFR Part 61, 

Subpart H, that have been determined in accordance with 40 CFR Part 61, Appendix D and by Department approved 

methods, that would cause any member of the public to receive an annual effective dose equivalent of at least one 

tenth (0.1) mrem per year, if total facility-wide emissions contribute an effective dose equivalent of less than three 

(3) mrem per year; or any radionuclide emission rate, if total facility-wide radionuclide emissions contribute an 

effective dose equivalent of greater than or equal to three (3) mrem per year. (5-1-95) 

b. In reference to a net emissions increase or the potential of a source or facility to emit a regulated 

air pollutant not listed in Subsection 006.1 03.a. above and not a toxic air pollutant, any emission rate; or (3-30-07) 

c. For a major facility or major modification which would be constructed within ten (10) kilometers 

of a Class I area, the emissions rate which would increase the ambient concentration of an emitted regulated air 

pollutant in the Class I area by one (1) microgram per cubic meter, twenty-four (24) hour average, or more. (4-5-00) 

102. Significant Contribution. Any increase in ambient concentrations which would exceed the 

following: (5-1-94) 

B. Sulfur dioxide: 	 (5-1-94) 

i. One (1.0) microgram per cubic meter, annual average; 	 (5-1-94) 

ii. Five (5) micrograms per cubic meter, twenty-four (24) hour average; 	 (5-1-94) 

iii. Twenty-five (25) micrograms per cubic meter, three (3) hour average; 	 (5-1-94) 

b. Nitrogen dioxide, one (1.0) microgram per cubic meter, annual average; 	 (5-1-94) 

c. Carbon monoxide: 	 (5-1-94) 

13 
i. One-half (0.5) milligrams per cubic meter, eight (8) hour average; (5-1-94) 

ii. Two (2) milligrams per cubic meter, one (l) hour average; (5-1-94) 

d. PM-lO: (5-1-94) 

i. One (1.0) microgram per cubic meter, annual average; (5-1-94) 

ii. Five (5.0) micrograms per cubic meter, twenty-four (24) hour average. (5-1-94) 

103. Small Fire. A fire in which the material to be burned is not more than four (4) feet in diameter nor 

more than three (3) feet high. (5-1-94) 

104. Smoke. Small gas-borne particles resulting from incomplete combustion, consisting 

predominantly, but not exclusively, of carbon and other combustible material. (5-1-94) 

105. Smoke Management Plan. A document issued by the Director to implement Sections 606 

through 616, Categories of Allowable Burning. (5-1-94) 

106. Smoke Management Program. A program whereby meteorological information, fuel conditions, 

fire behavior, smoke movement and atmospheric dispersal conditions are used as a basis for scheduling the location, 

amount and timing of open burning operations so as to minimize the impact of such burning on identified smoke 

sensitive areas. (5-1-94) 

107. Source. A stationary source. 

108. Source Operation. The last operation preceding the emission of air pollutants, when this 

operation: (5-1-94) 

a. Results in the separation ofthe air pollutants from the process materials or in the conversion of the 

process materials into air pollutants, as in the case of fuel combustion; and (5-1-94) 

b. Is not an air cleaning device. (5-1-94) 

109. Stack. Any point in a source arranged to conduct emissions to the ambient air, including a 

chimney, flue, conduit, or duct but not including flares. (5-1-94) 

110. Standard Conditions. Except as specified in Subsection 576.02 for ambient air quality standards, 

a dry gas temperature of twenty degrees Celsius (20C) sixty-eight degrees Fahrenheit (68F) and a gas pressure of 

seven hundred sixty (760) millimeters of mercury (14.7 pounds per square inch) absolute. (4-5-00) 

111. Startup. The normal and customary time period required to bring air pollution control equipment 

or an emissions unit, including process equipment, from a nonoperational status into normal operation. (5-1-94) 

112. Stationary Source. Any building, structure, facility, emissions unit, or installation which emits or 

may emit any air pollutant. The fugitive emissions shall not be considered in determining whether a permit is 

required unless required by federal law. (4-11-06) 

113. Tier I Source. Any of the following: (5-1-94) 

a. Any source located at any major facility as defined in Section 008; (4-5-00) 

b. Any source, including an area source, subject to a standard, limitation, or other requirement under 

42 U.S.C. Section 7411 or 40 CFRPart 60, and required by EPA to obtain a Part 70 permit; (4-11-06) 

c. Any source, including an area source, subject to a standard or other requirement under 42 U.S.C. 

14 
Section 7412, 40 CFR Part 61 or 40 CFR Part 63, and required by EPA to obtain a Part 70 permit, except that a 

source is not required to obtain a permit solely because it is subject to requirements under 42 U.S.C. Section 

7412(r); (4-11-06) 

d. Any Phase II source; and (5-1-94) 

e. Any source in a source category designated by the Department. (5-1-94) 

114. Total Suspended Particulates. Particulate matter as measured by the method described in 40 

CFR 50 Appendix B. (4-5-00) 

lIS. Toxic Air Pollutant. An air pollutant that has been determined by the Department to be by its 

nature, toxic to human or animal life or vegetation and listed in Section 585 or 586. (5-1-94) 

1I6. Toxic Air Pollutant Carcinogenic Increments. Those ambient air quality increments based on 

the probability of developing excess cancers over a seventy (70) year lifetime exposure to one (l) microgram per 

cubic meter (l uglm3) of a given carcinogen and expressed in terms of a screening emission level or an acceptable 

ambient concentration for a carcinogenic toxic air pollutant. They are listed in Section 586. (5-1-94) 

1I7. Toxic Air Pollutant Non-carcinogenic Increments. Those ambient air quality increments based 

on occupational exposure limits for airborne toxic chemicals expressed in terms of a screening emission level or an 

acceptable ambient concentration for a non-carcinogenic toxic air pollutant. They are listed in Section 585. (5-1-94) 

118. Toxic Substance. Any air pollutant that is determined by the Department to be by its nature, toxic 

to human or animal life or vegetation. (5 -1-94) 

119. Trade Waste. Any solid, liquid or gaseous material resulting from the construction or demolition 

of any structure, or the operation of any business, trade or industry including, but not limited to, wood product 

industry waste such as sawdust, bark, peelings, chips, shavings and cull wood. (5-1-94) 

120. TRS (Total Reduced Sulfur). Hydrogen sulfide, mercaptans, dimethyl sulfide, dimethyl 

disulfide and any other organic sulfide present. (5-1-94) 

121. Unclassifiable Area. An area which, because of a lack of adequate data, is unable to be classified 

pursuant to 42 U.S.C. Section 7407(d) as either an attainment or a nonattainment area. (5-1-94) 

122. Uncontrolled Emission. An emission which has not been treated by control equipment. (5-1-94) 

123. Upset. An unplanned disruption in the normal operations of any equipment or emissions unit 

which may cause excess emissions. (4-5-00) 

"124. Visibility Impair~ent. Any humanly perceptible change in visibility (light extinction, visual 

rahg&;~(jntrast, coloration) from that which would have existed under natural conditions. (3-30-07) 

Visibility in Any Mandatory Class I Federal Area. Includes any integral vista associated with 

(3-30-07) 

126. Wigwam Burner. Wood waste burning devices commonly called teepee burners, silos, truncated 

cones, and other such burners commonly used by the wood product industry for the disposal by burning of wood 

wastes. (5-1-94) 

127. Wood Stove Curtailment Advisory. An air pollution alert issued through local authorities and/or 

the Department to limit wood stove emissions during air pollution episodes. (5-1-94) 

15 
007. DEFINITIONS FOR THE PURPOSES OF SECTIONS ZOO THROUGH 2Z8 AND 400 THROUGH 

461. 

01. Agricultural Activities and Services. For the purposes of Subsection 222.02.f., the usual and 

customary activities of cultivating the soil, producing crops and raising livestock for use and consumption. 

Agricultural activities and services do not include manufacturing, bulk storage, handling for resale or the 

formulation of any agricultural chemical listed in Sections 585 or 586. (5-1-94) 

OZ. Baseline Actual Emissions. The rate of emissions, in tons per year, of a regulated air pollutant as 

determined by the following provisions: (4-11-06) 

ft. For any existing electric utility steam generating unit, baseline actual emissions means the average 

rate, in tons per year, at which the unit actually emitted the regulated air pollutant during any consecutive twentyfour (24) month period selected by the owner or operator within the five (5) year period immediately preceding 

when the owner or operator begins actual construction of the project. The Director shall allow the use of a different 

time period upon a determination that it is more representative of normal source operation. (4-11-06) 

i. The average rate shall include fugitive emissions to the extent quantifiable, and emissions 

associated with startups, shutdowns, and malfunctions. (4-11-06) 

ii. The average rate shall be adjusted downward to exclude any non-compliant emissions that 

occurred while the source was operating above any emission limitation that was legally enforceable during the 

consecutive twenty-four (24) month period. (4-11-06) 

1ll. For a regulated air pollutant, when a project involves multiple emissions units, only one (1) 

consecutive twenty-four (24) month period must be used to determine the baseline actual emissions for all the 

emissions units being changed. A different consecutive twenty-four (24) month period can be used for each 

regulated air pollutant. (4-11-06) •.J 

iv. The average rate shall not be based on any consecutive twenty-four (24) month period for which 

there is inadequate information for determining annual emissions, in tons per year, and for adjusting this amount if 

required by Subsection 007.02.a.ii. (3-30-07) 

b. For an existing emissions unit (other than an electric utility steam generating unit), baseline actual 

emissions means the average rate, in tons per year, at which the emissions unit actually emitted the regulated air 

pollutant during any consecutive twenty-four (24) month period selected by the owner or operator within the ten 

(to) year period immediately preceding either the date the owner or operator begins actual construction of the 

project, or the date a complete permit application is received by the Director for a permit required under these rules, 

whichever is earlier, except that the ten (to) year period shall not include any period earlier than November 15, 

1990. (4-11-06) 

i. The average rate shall include fugitive emissions to the extent quantifiable, and emissions 

associated with startups, shutdowns, and malfunctions. (4-11-06) 

ii. The average rate shall be adjusted downward to exclude any non-compliant emissions that 

occurred while the source was operating above an emission limitation that was legally enforceable during the 

consecutive twenty-four (24) month period. (4-11-06) 

lll. The average rate shall be adjusted downward to exclude any emission limitation with which the 

source must currently comply, had such source been required to comply with such limitations during the consecutive 

twenty-four (24) month period; however, if an emission limitation is part of a standard or other requirement under 

40 CFR Part 63, the baseline actual emissions need only be adjusted if the Department has taken credit for such 

emissions reductions in an attainment demonstration or maintenance plan. (4-11-06) 

iv. For a regulated air pollutant, when a project involves multiple emissions units, only one (1) .J 

consecutive twenty-four (24) month period must be used to determine the baseline actual emissions for all the 

16 
emissions units being changed. A different consecutive twenty-four (24) month period can be used for each 

regulated air pollutant. (4-11-06) 

v. The average rate shall not be based on any consecutive twenty-four (24) month period for which 

there is inadequate information for determining annual emissions, in tons per year, and for adjusting this amount if 

required by Subsections 006.03.b.ii. and 006.03.b.iii. (4-11-06) 

c. For a new emissions unit, the baseline actual emissions for purposes of determining the emissions 

increase that will result from the initial construction and operation of such unit shan equal zero (0); and, thereafter, 

for all other purposes, shall equal the unit's potential to emit. (4-11-06) 

d. For a plantwide applicability limit (PAL) for a stationary source, the baseline actual emissions 

shall be calculated for existing electric utility steam generating units in accordance with the procedures contained in 

Subsection 007.02.a, for other existing emissions units in accordance with the procedures contained in Subsection 

007.02.b, and for a new emissions unit in accordance with the procedures contained in Subsection 007.02.c. 

(3-30-07) 

03. Begin Actual Construction. Commence construction. (4-11-06) 

04. Emissions Increase. The amount by which projected actual emissions exceed baseline actual 

emissions ofan emissions unit. (4-11-06) 

OS. Innovative Control Technology. Any system of air pollution control that has not been 

adequately demonstrated in practice, but would have a substantial likelihood of achieving greater continuous 

emissions reduction than any control system in current practice, or of achieving at least comparable reductions at 

lower cost in terms of energy, economics, or non-air quality environmental effects. (5-1-94) 

06. Net Emissions Increase. For purposes of Sections 204 and 205, a net emissions increase shall be 

defmed by the federal regulations incorporated by reference. For purposes of Section 210, a net emissions increase 

shall be an emissions increase from a particular modification plus any other increases and decreases in actual 

emissions at the facility that are creditable and contemporaneous with the particular modification, where: (4-11-06) 

a. A creditable increase or decrease in actual emissions is contemporaneous with a particular 

modification if it occurs between the date five (5) years before the commencement of construction or modification 

on the particular change and the date that the increase from the particular modification occurs. Any replacement unit 

that requires shakedown becomes operational only after a reasonable shakedown period, not to exceed one hundred 

and eighty (I 80) days; (4-5-00) 

b. A decrease in actual emissions is creditable only if it satisfies the requirements for emission 

reduction credits (Section 460) and has approximately the same qualitative significance for public health and welfare 

as that attributed to the increase from the particular modification, and is federally enforceable at and after the time 

that construction ofthe modification commences. (4-5-00) 

c. The increase in toxic air pollutant emissions from an already operating or permitted source is not 

included in the calculation ofthe net emissions increase for a proposed new source or modification if: (5-1-95) 

i. The already operating or permitted source commenced construction or modification prior to July 

1, 1995; or (5-1-95) 

ii. The uncontrolled emission rate from the already operating or permitted source is ten per cent 

(10010) or less ofthe applicable screening emissions level listed in Section 585 or 586; or (6-30-95) 

111. The already operating or permitted source is an environmental remediation source subject to or 

regulated by the Resource Conservation and Recovery Act (42 U.S.C. Sections 6901-6992k) and "Idaho Rules and 

Standards for Hazardous Waste," (IDAPA 58.01.05.000 et seq.) or the Comprehensive Environmental Response, 

Compensation and Liability Act (42 U.S.C. 6901-6992k) or a consent order. (6-30-95) 

17 
07. Pilot Plant. A stationary source located at least one quarter (1/4) mile from any sensitive receptor 

that functions to test processing, mechanical, or pollution control equipment to determine full-scale feasibility and 

which does not produce products that are offered for sale except in developmental quantities. (5-1-94) 

08. Projected Actual Emissions. 	 (4-11-06) 

a. The maximum annual rate, in tons per year, at which an existing emissions unit is projected to 

emit a regulated air pollutant in anyone (1) of the five (5) years (twelve (12) month period) following the date the 

unit resumes regular operation after the project, or in anyone (I) of the ten (l0) years following that date, if the 

project involves increasing the emissions unit's design capacity or its potential to emit that regulated air pollutant 

and full utilization of the unit would result in a significant emissions increase or a significant net emissions increase 

at an existing major stationary source. (4-11-06) 

b. 	 In determining the projected actual emissions, the owner or operator ofthe stationary source: 

(4-11-06) 

i. Shall consider all relevant information including, but not limited to, historical operational data, the 

company's own representations, the company's expected business activity and the company's highest projections of 

business activity, the company's filings with state or federal regulatory authorities, and compliance plans under the 

approved state implementation plan; and (4-11-06) 

ii. Shall include fugitive emissions to the extent quantifiable and emissions associated with startups, 

shutdowns, and malfunctions; and (4-11-06) 

Ill. Shall exclude, in calculating any increase in emissions that results from the particular project, that 

portion of the unit's emissions following the project that an existing unit could have accommodated during the 

consecutive twenty-four (24) month period used to establish the baseline actual emissions and that are also unrelated 

to the particular project, including any increased utilization due to product demand growth; or (4-11-06) 

iv. In lieu of using the method set out in Subsections 007.1l.b.i. through 007.1l.b.iii., may elect to 

use the emissions unit's potential to emit, in tons per year. (4-11-06) 

09. Reasonable Further Progress (RFP). Annual incremental reductions in emissions of the 

applicable air pollutant as identified in the SIP which are sufficient to provide for attainment of the applicable 

ambient air quality standard by the required date. (4-11-06) 

10. Sensitive Receptor. Any residence, building or location occupied or frequented by persons who, 

due to age, infirmity or other health based criteria, may be more susceptible to the deleterious effects of a toxic air 

pollutant than the general population including, but not limited to, elementary and secondary schools, day care 

centers, playgrounds and parks, hospitals, clinics and nursing homes. (5-1-94) 

ll. Short Term Source. Any new stationary source or modification to an existing source, with an 

operational life no greater than five (5) years from the inception of any operations to the cessation of actual 

operations. (5-1-94) 

12. Toxic Air Pollutant Reasonably Available Control Technology (T-RACT). An emission 

standard based on the lowest emission of toxic air pollutants that a particular source is capable of meeting by the 

application of control technology that is reasonably available, as determined by the Department, considering 

technological and economic feasibility. If control technology is not feasible, the emission standard may be based on 

the application of a design, equipment, work practice or operational requirement, or combination thereof. (5-1-94) 

18 
008. DEFINITIONS FOR THE PURPOSES OF SECTIONS 300 THROUGH 386. 

01. Affected States. AU States: 	 (5-1-94) 

a. Whose air quality may be affected by the emissions ofthe Tier I source and that are contiguous to 

Idaho; or (5-1-94) 

b. That are within fifty (50) miles ofthe Tier I source. 	 (5-1-94) 

02. Allowance. An authorization allocated to a Phase II source by the EPA to emit during or after a 

specified calendar year, one (I) ton of sulfur dioxide. (5-1-94) 

03. Applicable Requirement. All ofthe following if approved or promulgated by EPA as they apply 

to emissions units in a Tier I source (including requirements that have been promulgated through rulemaking at the 

time of permit issuance but which have future-effective compliance dates): (5-1-94) 

a. Any standard or other requirement provided for in the applicable state implementation plan, 

including any revisions to that plan that are specified in 40 CFR Parts 52.670 through 52.690. (5-1-94) 

b. Any term or condition of any permits to construct issued by the Department pursuant to Sections 

200 through 223 or by EPA pursuant to 42 U.S.C. Sections 7401 through 7515; provided that terms or conditions 

relevant only to toxic air pollutants are not applicable requirements. (4-5-00) 

c. 	 Any standard or other requirement under 42 U.S.C. Section 7411 including 40 CFR Part 60; 

(5-1-94) 

d. Any standard or other requirement under 42 U.S.C. Section 7412 including 40 CFR Part 61 and 

40 CFR Part 63; (5-1-94) 

e. Any standard or other requirement of the acid rain program under 42 U.S.C. Sections 7651 

through 76510; (5-1-94) 

f. Any requirements established pursuant to 42 U.S.C. Section 7414(a)(3), 42 U.S.C. Section 

7661c(b) or Sections 120 through 128 ofthese rules; (3-23-98) 

g. Any standard or other requirement governing solid waste incineration, under 42 U.S.C. Section 

7429; (5-1-94) 

h. Any standard or other requirement for consumer and commercial products and tank vessels, under 

42 U.S.C. Sections 7511 b(e) and (t); and (5-1-94) 

i. Any standard or other requirement under 42 U.S.C. Sections 7671 through 7671q including 40 

CFRPart 82. (5-1-94) 

j. Any ambient air quality standard or increment or visibility requirement provided in 42 U.S.C. 

Sections 7470 through 7492, but only as applied to temporary sources receiving Tier I operating permits under 

Section 324. (5-1-94) 

04. Designated Representative. A responsible person or official authorized by the owner or operator 

of a Phase II unit to represent the owner or operator in matters pertaining to the holding, transfer, or disposition of 

allowances allocated to a Phase II unit, and the submission of and compliance with permits, permit applications, and 

compliance plans for the Phase II unit. (5-1-94) 

05. Draft Permit. The version of a Tier I operating permit that is made available by the Department 

for public participation and affected State review. (5-1-94) 

19 
06. Emergency. For the purposes of Section 332, an emergency is any situation arising from sudden 

and reasonably unforeseeable events beyond the control of the owner or operator, including acts of God, which 

situation requires immediate corrective action to restore normal operation and that causes the Tier I source to exceed 

a technology-based emission limitation under the Tier I operating permit due to unavoidable increases in emissions 

attributable to the emergency. An emergency shall not include noncompliance to the extent caused by improperly 

designed equipment, lack of preventative maintenance, careless or improper operation, or operator error. (4-5-00) 

07. Final Permit. The version of a Tier I permit issued by the Department that has completed all 

review procedures required in Sections 364 and 366. (5-1-94) 

08. General Permit. A Tier I permit issued pursuant to Section 335. (3-23-98) 

09. Insignificant Activity. Those activities that qualify as insignificant in accordance with Section 

317. (3-23-98) 

10. Major Facility. A facility (as defined in Section 006) is major if the facility meets any of the 

following criteria: (3-23-98) 

a. For hazardous air pollutants: (3-23-98) 

i. The facility emits or has the potential to emit ten (10) tons per year (tpy) or more of any hazardous 

air pollutant, other than radionuclides, which has been listed pursuant to 42 U.S.C. Section 7412(b); provided that 

emissions from any oil or gas exploration or production well (with its associated equipment) and emissions from any 

oil or gas pipeline compressor or pump station shall not be aggregated with emissions from other similar emission 

units within the facility. (5-1-94) 

ii. The facility emits or has the potential to emit twenty-five (25) tpy or more of any combination of 

any hazardous air pollutants, other than radionuclides, which have been listed pursuant to 42 U.S.C. 7412(b); 

provided that emissions from any oil or gas exploration or production well (with its associated equipment) and 

emissions from any oil or gas pipeline compressor or pump station shall not be aggregated with emissions from 

other similar emission units within the facility. (5-1-94) 

b. For non-attainment areas: (3-23-98) 

i. The facility is located in a "serious" particulate matter (PM-IO) nonattainment area and the facility 

has the potential to emit seventy (70) tpy or more ofPM-IO. (5-1-94) 

ii. The facility is located in a "serious" carbon monoxide nonattainment area in which stationary 

sources are significant contributors to carbon monoxide levels and the facility has the potential to emit fifty (50) tpy 

or more of carbon monoxide. (5-1-94) 

Ill. The facility is located in an ozone transport region established pursuant to 42 U.S.C. Section 

7511c and the facility has the potential to emit fifty (50) tpy or more of volatile organic compounds. (5-1-94) 

iv. The facility is located in an ozone nonattainment area and, depending upon the classification ofthe 

nonattainment area, the facility has the potential to emit the following amounts of volatile organic compounds or 

oxides of nitrogen; provided that oxides of nitrogen shall not be included if the facility has been identified in 

accordance with 42 U.S.C. Section 7411a(t)(l) or (2) ifthe area is "marginal" or "moderate," one hundred (100) tpy 

or more, if the area is "serious," fifty (50) tpy or more, if the area is "severe," twenty-five (25) tpy or more, and if 

the area is "extreme," ten (10) tpy or more. (3-23-98) 

c. The facility emits or has the potential to emit one hundred (l00) tons per year or more of any 

regulated air pollutant. The fugitive emissions shall not be considered in determining whether the facility is major 

unless the facility belongs to one (I) ofthe following categories: (4-11-06) 

i. Designated facilities. (3-23-98) 

20 
ii. All other source categories regulated by 40 CFR Part 60, 40 CFR Part 61 or 40 CFR Part 63, but 

only with respect to those air pollutants that have been regulated for that category and only if determined by rule by 

the Administrator ofEPA pursuant to Section 302(j) ofthe Clean Air Act. (4-5-00) 

11. Part 70. Unless specified otherwise in this chapter, all definitions adopted under 40 CFR Part 70, 

revised as ofJuly 1,2006, are hereby incorporated by reference. (3-30-07) 

12. Permit Revision. Any permit modification, administrative amendment or reopening. (3-19-99) 

13. Phase II Source. A source that is subject to emissions reduction requirements of 42 U.S.C. 

Section 7651 through 76510 and shall have the meaning given to it pursuant to those sections. (5-1-94) 

14. Phase II Unit. A unit that is subject to emissions reduction requirements of 42 U.S.C. Sections 

7651 through 76510 and the term shall have the meaning given to it pursuant to those sections. (5-1-94) 

15. Proposed Permit. The version of a permit that the Department proposes to issue and forwards to 

the EPA for review. (5-1-94) 

16. Section 502(b)(10) Changes. Changes that contravene an express permit term. Such changes do 

not include changes that would violate applicable requirements or contravene federally enforceable permit terms and 

conditions that are monitoring (including test methods), recordkeeping, reporting, or compliance certification 

requirements. (3-19-99) 

17. Tier I Operating Permit. Any permit covering a Tier I source that is issued, renewed, amended, 

or revised pursuant to Sections 300 through 386. (3-19-99) 

009. DEFINITIONS FOR THE PURPOSES OF 40 CFR PART 60. 


Notwithstanding the definitions listed in Sections 006 through 008, the definitions in 40 CFR Part 60 shall have the 


meaning given in that Part, except that the term "Administrator" shall mean "Department." (5-1-94) 


010. DEFINITIONS FOR THE PURPOSES OF 40 CFR PART 61 AND 40 CFR PART 63. 


Notwithstanding the definitions listed in Sections 006 through 008, the definitions in 40 CFR Part 61 and 40 CFR 


Part 63 shall have the meaning given in those Parts, except that the term "Administrator" shall mean "Department." 


(5-1-94) 

107. INCORPORATIONS BY REFERENCE. 

03. Documents Incorporated by Reference. The following documents are incorporated by reference 

into these rules: (5-1-94) 

a. Requirements for Preparation, Adoption, and Submittal of Implementation Plans and Appendix W 

to Part 51--Guideline on Air Quality Models. 40 CFR Parts 51 revised as of July 1,2006. The following portions of 

40 CFR Part 51 are expressly excluded from any incorporation by reference into these rules: (3-30-07) 

i. The clean unit and pollution control project provisions in 40 CFR 51.165; (3-30-07) 

~~: All sections included in 40 CFR Part 51, Subpart P, Protection of Visibility, except that 40 CFR 

51.~r~'O~(a), 51.307, and 51.308 are incorporated by reference into these rules; and (3-30-07) 

Appendix Y to Part 51, Guidelines for BART Determinations Under the Regional Haze Rule. 

(3-30-07) 

b. National Primary and Secondary Ambient Air Quality Standards, 40 CFR Part 50, revised as of 

July 1, 2006. (3-30-07) 

~ ~rt.~~~:::' '. Requirements for Preparation, Adoption, and Submittal of Implementation Plans, Protection of -~~ 

21 
• Visibility, 40 CFR 51.301, 51.304(a), 51.307, and 51.308, revised as of July 1,2006. 	 (3-30-07) 

d. Approval and Promulgation of Implementation Plans, 40 CFR Part 52, excluding the clean unit 

and pollution control project provisions in 40 CFR 52.21, revised as of July I, 2006. (3-30-07) 

e. Ambient Air Monitoring Reference and Equivalent Methods, 40 CFR Part 53, revised as ofJuly 1, 

2006. (3-30-07) 

f. Ambient Air Quality Surveillance, Quality Assurance Requirements for Prevention of Significant 

Deterioration (pSD Air Monitoring), 40 CFR Part 58, Appendix B, revised as of July I, 2006. (3-30-07) 

g. 	 Standards of Performance for New Stationary Sources, 40 CFR Part 60, revised as ofJuly 1,2006. 

(3-30-07) 

h. National Emission Standards for Hazardous Air Pollutants, 40 CFR Part 61, revised as of July I, 

2006. (3-30-07) 

i. National Emission Standards for Hazardous Air Pollutants for Source Categories, 40 CFR Part 63, 

revised as ofJuly I, 2006. (3-30-07) 

j. Compliance Assurance Monitoring, 40 CFR Part 64, revised as of July 1,2006. (3-30-07) 

k. Permits, 40 CFR Part 72, revised as of July 1,2006. 	 (3-30-07) 

I. Sulfur Dioxide Allowance System, 40 CFR Part 73, revised as ofJuly 1,2006. (3-30-07) 

m. Protection of Stratospheric Ozone, 40 CFR Part 82, revised as of July I, 2006. (3-30-07) 

n. Clean Air Act, 42 U.S.C. Sections 7401 through 7671g (1997). 	 (3-19-99) 

o. Determining Conformity of Federal Actions to State or Federal Implementation Plans: Conformity 

to State or Federal Implementation Plans of Transportation Plans, Programs and Projects Developed, Funded or 

Approved Under Title 23 U.S.C. or the Federal Transit Laws, 40 CFR Part 93, Subpart A, Sections 93.100 through 

93.129, revised as of July 1,2006, except that Sections 93.102(c), 93.104(d), 93.l04(e)(2), 93.105, 93.109(c)-(f), 

93.llS(e), 93.119(f)(3), 93.120(a)(2), 93.121(a)(1), and 93. 124(b) are expressly omitted from the incorporation by 

reference. (3-30-07) 

p. The fmal rule for Standards of Performance for New and Existing Stationary Sources: Electric 

Utility Steam Generating Units, 70 Fed. Reg. 2S,606 (May IS, 2005), corrected at 70 Fed. Reg. 51,266 the fmal rule 

for Standards of Performance for Electric Utility Steam Generating Units, Industrial-Commercial-Institutional 

Steam Generating Units, and Small Industrial-Commercial-Institutional Steam Generating Units, only as it applies to 

coal fired electric steam generating units as defined in 40 CFR 60.24, 71 Fed. Reg. 9865 (February 27, 2006); 

Revision of December 2000 Clean Air Act Section l12(n) Finding Regarding Electric Utility Steam Generating 

Units; and Standards of Performance for New and Existing Electric Utility Steam Generating Units: 

Reconsideration, 71 Fed. Reg. 33,388 (June 9, 2006) are expressly excluded from any incorporation by reference 

into these rules. (3-30-07) 

199. ELECTRIC GENERATING UNIT CONSTRUCTION PROHIBITION. 


No owner or operator shall construct or operate an Electric Generating Unit (EGU), as defined in 40 CFR 60.24, 


with a potential to emit mercury (Hg) emissions. " (3-30-07) 


200. PROCEDURES AND REQUIREMENTS FOR PERMITS TO CONSTRUCT. 


The purposes of Sections 200 through 228 is to establish uniform procedures and requirements for the issuance of 


"Permits to Construct." As used throughout Sections 200 through 228 and 578 through 581, major facility shall be 


defmed as major stationary source in 40 CFR 52.21(b), revised as of July 1,2005, and major modification shall be J 


defmed as in 40 CFR 52.21 (b), revised as of July 1,2006. These CFR sections have been codified in the electronic 


22 
CFR which is available at www.gpoaccess.gov/ecfr. (3-30-07) 

204. PERMIT REQUIREMENTS FOR NEW MAJOR FACILITIES OR MAJOR MODIFICATIONS 

IN NONATT AINMENT AREAS. 

New major facilities or major modifications proposed for location in a nonattainment area and which would be 

major for the nonattainment regulated air pollutant are considered nonattainment new source review (NSR) actions 

and are subject to the requirements in Section 204. Section 202 contains application requirements and Section 209 

contains processing requirements for nonattainment NSR permitting actions. The intent of Section 204 is to 

incorporate the federal nonattainment NSR rule requirements. (4-6-05) 

01. Incorporated Federal Program Requirements. Requirements contained in the following 

subparts of 40 CFR 51.165, excluding the clean unit and pollution control project provisions, revised as of July 1, 

2005, are hereby incorporated by reference. Requirements contained in the following subparts of 40 CFR 52.21, 

revised as of July 1, 2006, are hereby incorporated by reference. These CFR sections have been codified in the 

electronic CFR which is available at www.gpoaccess.gov/ecfr 

40 CFR Reference 40 CFR Reference Title 

40 CFR 51.165(a)(1) Definitions 

40 CFR 51.165(a)(2)(ii)(A) - (J) Applicability Provisions 

40 CFR 51.165(a)(6)(i) - (v) Applicability Provisions 

40 CFR 52.21 (aa) Actual PALs 

'-- (3-30-07) 

02. Additional Requirements. The applicant must demonstrate to the satisfaction of the Department 

the following: (4-6-05) 

a. LAER. Except as otherwise provided in Section 204, the new major facility or major modification 

would be operated at the lowest achievable emission rate (LAER) for the nonattainment regulated air pollutant, 

specifically: (4-6-05) 

i. A new major facility would meet the lowest achievable emission rate at each new emissions unit 

which emits the nonattainment regulated air pollutant; and (4-5-00) 

ii. A major modification would meet the lowest achievable emission rate at each new or modified 

emissions unit which has a net emissions increase of the nonattainment regulated air pollutant. (4-5-00) 

b. Required offsets. Allowable emissions from the new major facility or major modification are 

offset by reductions in actual emissions from stationary sources, facilities, and/or mobile sources in the 

nonattainment area so as to represent reasonable further progress. All offsetting emission reductions must satisfy the 

requirements for emission reduction credits (Section 460) and provide for a net air quality benefit which satisfies the 

requirements of Section 208. If the offsets are provided by other stationary sources or facilities, a permit to construct 

shall not be issued for the new major facility or major modification until the offsetting reductions are made 

enforceable through the issuance of operating permits. The new major facility or major modification may not 

commence operation, and an operating permit for the new major facility or major modification shall not be effective 

before the date the offsetting reductions are achieved. (4-5-00) 

c. Compliance status. All other sources in the State owned or operated by the applicant, or by any 

entity controlling, controlled by or under common control with such person, are in compliance with all applicable 

emission limitations and standards or subject to an enforceable compliance schedule. (5-1-94) 

23 
d. Effect on visibility. The effect on visibility of any federal Class I area, Class I area designated by 

the Department, or integral vista of a mandatory Class I Federal Area, by the new major facility or major 

modification, is consistent with making reasonable progress toward the national visibility goal referred to in 40 CFR 

51.300(a). The Department may take into account the costs of compliance, the time necessary for compliance, the 

energy and non-air quality environmental impacts of compliance and the useful life ofthe source. Any integral vista 

which the Federal Land Manager has not identified at least six (6) months prior to the submittal of a complete 

application, or which the Department determines was not identified in accordance with the criteria adopted pursuant 

to 40 CFR 51.304(a), may be exempted from Section 204 by the Department. (3-30-07) 

03. Nonmajor Requirements. If the proposed action meets the requirements of an exemption or 

exclusion under the provisions of 40 CFR 51.165 or 40 CFR 52.21 incorporated in Section 204, the nonmajor 

facility or stationary source permitting requirements of Sections 200 through 228 apply, including the exemptions in 

Sections 220 through 223. (4-6-05) 

205. PERMIT REQUIREMENTS FOR NEW MAJOR FACILITIES OR MAJOR MODIFICATIONS 

IN ATTAINMENT OR UNCLASSIFIABLE AREAS. 

The prevention of significant deterioration (PSD) program is a construction permitting program for new major 

facilities and major modifications to existing major facilities located in areas in attainment or in areas that are 

unclassifiable for any criteria air pollutant. Section 202 contains application requirements and Section 209 contains 

processing requirements for PSD permit actions. The intent of Section 205 is to incorporate the federal PSD rule 

requirements. (4-6-05) 

01. Incorporated Federal Program Requirements. Requirements contained in the following 

subparts of 40 CFR 52.21, excluding the clean unit and pollution control project provisions, revised as of July I, 

2006, are hereby incorporated by reference. These CFR sections have been codified in the electronic CFR which is 

available at www.gpoaccess.gov/ecfr. 

40 CFR Reference 40 CFR Reference Title 

40 CFR 52.21 (a)(2) Applicability Procedures 

40 CFR 52.21 (b) Definitions 

40 CFR 52.21 (i) Review of Major Stationary Sources and Major Modifications 

- Source Applicability and Exempting 

40 CFR 52.21(j) Control Technology Review 

40CFR5 urce Impact Analysis 

40 CFR 52.21 (r) Source Obligation 

40 CFR 52.21 (v) Innovative Control Technology 

40 CFR 52.21(w) Permit Rescission 

40 CFR 52.21(aa) Actual PALS 

(3-30-07) 

02. Effect on Visibility. The applicant must demonstrate that the effect on visibility of any federal 

Class I area, Class I area designated by the Department, or integral vista of a mandatory Class I Federal Area, by the 

new major facility or major modification, is consistent with making reasonable progress toward the national 

24 
visibility goal referred to in 40 CFR 51.300( a). The Department may take into account the costs of compliance, the 

time necessary for compliance, the energy and non-air quality environmental impacts of compliance and the useful 

life of the source. Any integral vista which the Federal Land Manager has not identified at least six (6) months prior 

to the submittal of a complete application, or which the Department determines was not identified in accordance 

with the criteria adopted pursuant to 40 CFR 51.304(a), may be exempted from this requirement by the Department. 

03. Exception to Incorporation by Reference of 40 CFR 52.21. Every use of the word 

Administrator in 40 CFR 52.21 means the Department except for the following: (4-6-05) 

a. In 40 CFR 52.21 (b )(17), the definition of federally enforceable, Administrator means the EPA 

Administrator. (4-6-05) 

b. In 40 CFR 52.21(1)(2), air quality models, Administrator means the EPA Administrator. (4-6-05) 

c. In 40 CFR 52.21(b)(43), permit program approved by the Administrator, Administrator means the 

EPA Administrator. (4-6-05) 

d. In 40 CFR 52.21(b)(48)(ii)(c), MACT standard that is proposed or promulgated by the 

Administrator, Administrator means the EPA Administrator. (4-6-05) 

e. In 40 CFR 52.21(b)(50)(i), regulated NSR pollutant as defined by Administrator, Administrator 

means the EPA Administrator. (4-6-05) 

04. Nonmajor Requirements. If the proposed action meets the requirements of an exemption or 

exclusion under the provisions of 40 CFR 52.21 incorporated in Section 205, the nonmajor facility or stationary 

source permitting requirements of Sections 200 through 228 apply, including the exemptions in Sections 220 

through 223. (4-6-05) 

600. RULES FOR CONTROL OF OPEN BURNING. 

The purpose of Sections 600 through 617 is to reduce the amount of emissions and minimize the impact of open 

burning to protect human health and the environment from air pollutants resulting from open burning as well as to 

reduce the visibility impairment in mandatory Class I Federal Areas in accordance with the regional haze long-term 

strategy referenced at Section 667. (3-30-07) 

651. GENERAL RULES. 

All reasonable precautions shall be taken to prevent particulate matter from becoming airborne. In determining what 

is reasonable, consideration will be given to factors such as the proximity of dust emitting operations to human 

habitations and/or activities, the proximity to mandatory Class I Federal Areas and atmospheric conditions which 

might affect the movement of particulate matter. Some of the reasonable precautions may include, but are not 

limited to, the following: (3-30-07) 

01. Use of Water or Chemicals. Use, where practical, of water or chemicals for control ofdust in the 

demolition of existing buildings or structures, construction operations, the grading of roads, or the clearing of land. 

(5-1-94) 

02. Application of Dust Suppressants. Application, where practical, of asphalt, oil, water or suitable 

chemicals to, or covering ofdirt roads, material stockpiles, and other surfaces which can create dust. (5-1-94) 

03. Use of Control Equipment. Installation and use, where practical, ofhoods, fans and fabric filters 

or equivalent systems to enclose and vent the handling ofdusty materials. Adequate containment methods should be 

employed during sandblasting or other operations. (5-1-94) 

04. Covering of Trucks. Covering, when practical, open bodied trucks transporting materials likely 

to give rise to airborne dusts. (5-1-94) 

25 ~ 
05. Paving. Paving ofroadways and their maintenance in a clean condition, where practical. (5-1-94) 

06. Removal of Materials. Prompt removal of earth or other stored material from streets, where 

practical. 

....., 

(5-1-94) 

665. REGIONAL HAZE RULES. 

The purpose of Sections 665 through 668 is to address regional haze visibility impairment in mandatory Class [ 

Federal Areas. The intent of Sections 665 through 668 is to set forth the requirements to implement the federal 

programs for visibility protection and regional haze. (3-30-07) 

666. REASONABLE PROGRESS GOALS. 

The Department will establish reasonable progress goals, expressed in deciviews for each mandatory Class I Federal 

Area located within Idaho. These goals will provide for reasonable progress toward achieving natural visibility 

conditions. The reasonable progress goals must provide for an improvement in visibility for the most impaired days 

over the period of the implementation plan and ensure no degradation in visibility for the least impaired days over 

the same period. The reasonable progress goals are not directly enforceable, but will be implemented through 

enforceable strategies in the long-term strategy. (3-30-07) 

01. Process for Setting Reasonable Progress Goals. In establishing a reasonable progress goal for 

any mandatory Class I Federal Area within Idaho, the Department shall: (3-30-07) 

a. Consider the costs of compliance, the time necessary for compliance, the energy and non-air 

quality environmental impacts of compliance, and the remaining useful life of any potentially affected sources, and 

include a demonstration showing how these factors were taken into consideration in selecting the goal. (3-30-07) 

b. Analyze and determine the rate of progress needed to attain natural visibility conditions by the 

year 2064. To calculate this rate of progress, the Department will compare baseline visibility conditions to natural 

visibility conditions in the mandatory Class 1 Federal Area and determine the uniform rate of visibility improvement 

(measured in deciviews) that would need to be maintained during each implementation period in order to attain 

natural visibility conditions by 2064. In establishing the reasonable progress, the Department will consider the 

uniform rate of improvement in visibility and the emission reduction measures needed to achieve it for the period 

covered by the implementation plan. (3-30-07) 

,1 

."" 

c. Consult with those states which may reasonably be anticipated to cause or contribute to visibility 

impairment in the mandatory Class I Federal Area. (3-30-07) 

02. Justification for Reasonable Progress Goals. If the Department establishes a reasonable 

progress goal that provides for a slower rate ofimprovement in visibility than the rate that would be needed to attain 

natural conditions by 2064, the Department will demonstrate, based on the factors in Subsection 666.01.a., that the 

rate of progress for the implementation plan to attain natural conditions by 2064 is not reasonable; and that the 

progress goal adopted by the Department is reasonable. The Department will provide to the public for review, as 

part of its implementation plan, an assessment of the number of years it would take to attain natural conditions if 

visibility improvement continues at the rate of progress selected by the Department as reasonable. (3-30-07) 

667. LONG·TERM STRATEGY FOR REGIONAL HAZE. 

The purpose of Section 667 is to develop a long-term strategy for making reasonable progress toward the national 

goal of preventing any future and remedying any existing impairment of visibility in mandatory Class I Federal 

Areas in which impairment results from man-made air pollution. (3-30.07) 

01. Submittal of Long-Term Strategy. The Department will submit to EPA a long-temi strategy 

that addresses regional haze visibility impairment for each mandatory Class I Federal Area within the state and for 

each mandatory Class I Federal Area located outside the state which may be affected by emissions from the state. 

(3-30.07) 

02. Enforceable Emission Limitations. The long-term strategy must include enforceable emissions J 

IImltal:lOnls, compliance schedules, and other measures as necessary to achieve the reasonable progress goals 

26 
established by the Department. 	 (3-30-07) 

03. Requirements for Long-Term Strategy. In establishing long-term strategy for regional haze, the 

Department will meet the following requirements: (3-30-07) 

a. The Department will document the technical basis, including modeling, monitoring and emissions 

information, on which the state is relying to determine its apportionment ofemission reduction obligations necessary 

for achieving reasonable progress in each mandatory Class I Federal Area it affects. The Department may meet this 

requirement by relying on technical analyses developed by the regional planning organization and approved by all 

state participants. The Department will identify the baseline emission inventory on which its strategies are based. 

The baseline emissions inventory year is presumed to be the most recent year of the consolidated periodic emissions 

inventory. (3-30-07) 

b. The Department will identify all anthropogenic sources of visibility impairment considered by the 

Department in developing its long-term strategy. The Department should consider major and minor stationary 

sources, mobile sources, and area sources. (3-30-07) 

c. The Department will consider, at a minimum, the following factors in developing its long-term 

strategy: (3-30-07) 

i. Emission reductions due to ongoing air pollution control programs, including measures to address 

reasonably attributable visibility impairment; (3-30-07) 

ii. Measures to mitigate the impacts of construction activities; 	 (3-30-07) 

iii. 	 Emissions limitations and schedules for compliance to achieve the reasonable progress goal; 

(3-30-07) 

iv. Source retirement replacement schedules; 	 (3-30-07) 

v. Smoke management techniques for agricultural and forestry management purposes including plans 

as currently exist with the state for these purposes; (3-30-07) 

vi. Enforceability ofemissions limitations and control measures; and 	 (3-30-07) 

vii. The anticipated net effect on visibility due to projected changes in point, area, and mobile source 

emissions over the period addressed by the long-term strategy. (3-30-07) 

04. Interstate Consultation. The Department will undertake the following process in developing the 

long-term strategy where interstate consultation is required. (3-30-07) 

a. Where Idaho has emissions that are reasonably anticipated to contribute to visibility impairment in 

any mandatory Class I Federal Area located in another state or states, the Department will consult with the other 

state(s) in order to develop coordinated emission management strategies. (3-30-07) 

b. The Department will consult with any other state having emissions that are reasonably anticipated 

to contribute to visibility impairment in any mandatory Class I Federal Area within Idaho. (3-30-07) 

c. Where other states cause or contribute to impairment in a mandatory Class I Federal Area, the 

Department must demonstrate that the state has included in its implementation plan all measures necessary to obtain 

its share of the emission reductions needed to meet the progress goal for the area. If the state of Idaho has 

participated in a regional planning process, the Department must ensure the state has included all measures needed 

to achieve its apportionment of emission reduction obligations agreed upon through that process. (3-30-07) 

668. BART REQUIREMENT FOR REGIONAL HAZE. 

27 
The purpose of Section 668 is to implement the BART requirements in 40 CFR 51.308(e). The following analysis 

and documentation is required for each BART -eligible source: (3-30-07) 

01. BART-Eligible Sources. The Department shall identify a list of all BART-eligible sources within 

the state. (3-30-07) 

02. BART Determination. The Department shall complete a determination of BART for each 

BART-eligible source in the state that emits any air pollutant which may reasonably be anticipated to cause or 

contribute to any impairment of visibility in any mandatory Class 1 Federal Area. All such sources are subject to 

BART. (3-30-07) 

a. A single source that is responsible for a one (l.0) deciview change or more in any mandatory 

Class I Federal Area is considered to "cause" visibility impairment. (3-30-07) 

b. A single source that is responsible for a one-half (0.5) deciview change or more in any mandatory 

Class I Federal Area is considered to "contribute" to visibility impairment. (3-30-07) 

c. The determination of BART must be based on an analysis of the best system of continuous 

emission control technology available and associated emission reductions achievable for each BART -eligible source 

that is subject to BART within the state. In this analysis, the following must be taken into consideration: (3-30-07) 

i. Costs of compliance; 	 (3-30-07) 

ii. Energy and non-air quality environmental impacts of compliance; 	 (3-30-07) 

iii. Any pollution control equipment in use at the source; 	 (3-30-07) 

iv. The remaining useful life ofthe source; and 	 (3-30-07) J 

v. The degree of improvement in visibility which may reasonably be anticipated to result from the 

use of such technology. (3-30-07) 

d. The Department may determine that a BART determination is not required: 	 (3-30-07) 

i. For sulfur dioxide (S02) or for nitrogen oxides (NOJ if a BART-eligible source has the potential 

to emit less than forty (40) tons per year of such pollutant(s); or (3-30-07) 

ii. 	 For PMlO if a BART-eligible source emits less than fifteen (15) tons per year ofsuch pollutant. 

(3-30-07) 

03. Alternative to Infeasible Emission Standards. If the Department determines in establishing 

BART that technological or economic limitations on the applicability of measurement methodology to a particular 

source would make the imposition of an emission standard infeasible, it may instead prescribe a design, equipment, 

work practice, or other operational standard, or combination thereof, to require the application of BART. Such 

standard, to the degree possible, is to set forth the emission reduction to be achieved by implementation of such 

design, equipment, work practice, or operation and must provide for compliance by means which achieve equivalent 

results. (3-30-07) 

04. BART Installation and Operation Due Date. Each source subject to BART is required to install 

and operate BART as expeditiously as practicable, but in no event later than five (5) years after approval of the 

implementation plan. (3-30-07) 

05. Maintenance of BART Equipment. Each source subject to BART is required to maintain the 

control equipment required by the Department and establish procedures to ensure such equipment is properly 

operated and maintained. (3-30-07) 

28 
(3-30-07) 

·06. BART Alternative. As an alternative to the installation of BART for a source or sources, the 

Department may approve a BART alternative. If the Department approves source grouping as a BART alternative, 

only sources (including BART-eligible and non-BART eligible sources) causing or contributing to visibility 

impairment to the same mandatory Class I Federal Area may be grouped together. (3-30-07) 

a. If a source(s) proposes a BART alternative, the resultant emissions reduction and visibility 

impacts must be compared with those that would result from the BART options evaluated for the source(s).(3-30-07) 

b. Source(s) proposing a BART alternative must demonstrate that this BART alternative will achieve 

greater reasonable progress than would be achieved through the installation and operation of BART. (3-30-07) 

c. Source(s) proposing a BART alternative shall include in the BART analysis an analysis and 

justification ofthe averaging period and method of evaluating compliance with the proposed emission limitation. 

(3-30-07) 

07. Reasonable Progress Goal Requirements for BART -Eligible Sources. Once the Department 

has met the requirements for BART or BART alternative, as identified in Subsection 668.06, BART-eligible sources 

will be subject to the requirements of reasonable progress goals, as defined in 40 CFR 51.308(d), in the same 

manner as other sources. 

29