Alaska Administrative Code

(a) Volumes II and III of the State Air Quality Control Plan for implementing and enforcing the provisions of AS 46.14 and this chapter, revised as of November 8, 2024, are adopted by reference. The plan includes the following documents that are also adopted by reference: (1) the…

(a) The following documents are adopted by reference: (1) the department's In Situ Burning Guidelines for Alaska, Revision 1, revised August 2008; (2) Workbook for Plume Visual Impact Screening and Analysis (revised), EPA 454/R-92-023, October 1992; (3) the United States Environm…

(a) The following provisions of 40 C.F.R. Part 60 (Standards of Performance for New Stationary Sources), revised as of March 23, 2021, are adopted by reference as they apply to a Title V source: (1) Subpart A (General Provisions), except 40 C.F.R. 60.9 (Availability of Informatio…

(a) A person may not dilute emissions with air to comply with this chapter, except that dilution air may be used at a sulfur recovery plant with a maximum production rate of 20 long tons per day or less to comply with the 500 ppm sulfur dioxide requirement of 18 AAC 50.055(c). (b…

(a) Visibility through the exhaust effluent of an incinerator, including an air curtain incinerator, may not be reduced by visible emissions, excluding condensed water vapor, by more than 20 percent averaged over any six consecutive minutes. (b) Particulate matter emissions from …

Notes 18 AAC 50.052 Eff. 6/21/98, Register 146; repealed 10/1/2004, Register 171 State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will…

(a) Visible emissions, excluding condensed water vapor, from an industrial process or fuel-burning equipment may not reduce visibility through the exhaust effluent by (1) more than 20 percent averaged over any six consecutive minutes, except as provided in (2) - (9) of this subse…

Notes 18 AAC 50.060 Eff. 1/18/97, Register 141; repealed 8/20/2016, Register 219, October 2016 State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison…

(a) General Requirements. Except when conducting open burning under (g), (h), or (i) of this section, a person conducting open burning shall comply with the limitations of (b) - (f) of this section and shall ensure that (1) the material is kept as dry as possible through the use …

Within three miles of the Alaska coastline, visible emissions, excluding condensed water vapor, may not reduce visibility through the exhaust effluent of a marine vessel by more than 20 percent except as follows: (1) while at berth or at anchor, visibility may be reduced by up to…

(a) A person may not operate a solid fuel-fired heating device in a manner that causes (1) black smoke; or (2) visible emissions that exceed 20 percent opacity for more than six minutes in any one hour in an area for which an air quality advisory is in effect under 18 AAC 50.245 …

(a) A person operating a solid fuel-fired heating device in an area identified in 18 AAC 50.015(b)(3) may use only the following fuels: (1) for wood-fired heating devices, and subject to the additional limitations under (b) of this section, (A) wood, if not prohibited under (c) o…

(a) Except as provided in this section, a person may not install, reinstall, sell, lease, distribute, or convey the following devices in an area identified in 18 AAC 50.015(b)(3): (1) a wood-fired hydronic heater; (2) a woodstove; (3) a wood-fired heating device with a manufactur…

(a) This section applies to an individual or business whose activities emit PM-2.5 or PM-2.5 precursor pollutants within an area identified in 18 AAC 50.015(b)(3). (b) After September 1, 2022, only fuel oil, containing no more than 1,000 parts per million sulfur, may be sold or p…

(a) This section applies to a person who (1) owns or operates a coal-fired heating device in an area identified in 18 AAC 50.015(b)(3), if the coal-fired device (A) is installed before January 12, 2018; and (B) is not otherwise exempted in this section; or (2) intends to supply, …

Notes 18 AAC 50.080 Eff. 1/18/97, Register 141; repealed 4/16/2022, Register 242, July 2022 State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison fe…

(a) In an area identified in 18 AAC 50.015(b)(3), the following requirements apply: (1) after December 31, 2025, a residential building owner must have an energy rating completed by an energy rater before listing the building or property for sale; the residential building owner s…

(a) The owner, operator, or permittee of a volatile liquid storage tank located in the Port of Alaska that has a volume of 9,000 barrels (378,000 gallons) or more shall reduce organic vapors emitted to the atmosphere by using (1) an internal floating roof installed before June 1,…

(a) The owner, operator, or permittee of a stationary source that is located in the Port of Alaska and that has a volatile liquid loading rack with a design throughput of 15 million gallons (357,143 barrels) or more per year shall reduce organic vapors emitted to the atmosphere b…

The actual and potential emissions of nonroad engines are not included when determining the classification of a stationary source or modification under AS 46.14.130. Nothing in this section exempts nonroad engines from compliance with other applicable air pollution control requir…

No person may permit any emission which is injurious to human health or welfare, animal or plant life, or property, or which would unreasonably interfere with the enjoyment of life or property. Notes 18 AAC 50.110 Eff. 5/26/72, Register 42 Authority:AS 46.03.020 AS 46.03.710 Stat…

If requested by the department to determine compliance with AS 46.03, AS 46.14, and this chapter, the owner, operator, or permittee of a stationary source shall maintain records of, and report to the department information on, the nature and amount of emissions from the stationar…

(a) Upon a finding by the department that emissions from an existing stationary source have a reasonable likelihood of causing or significantly contributing to ambient concentrations of one or more air pollutants that exceed an ambient air quality standard, maximum allowable incr…

(a) Any permit application, report, affirmation, or compliance certification required by the department under a permit program established under AS 46.14 or this chapter must include the signature of a responsible official for the permitted stationary source following the stateme…

Notes 18 AAC 50.210 Eff. 1/18/97, Register 141; repealed 10/1/2004, Register 171 State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will…

(a) A person who submits meteorological or ambient air monitoring data under AS 46.03, AS 46.14, or this chapter shall obtain the data in accordance with (1) the department's Quality Assurance Project Plan for the State of Alaska Air Monitoring & Quality Assurance Program, adopte…

(a) The department may require an owner, operator, or permittee to conduct air pollutant emission tests to determine compliance with AS 46.14 and this chapter. If an applicable emission standard, permit provision, or other requirement specifies a time period within which testing …

(a)The owner or operator of an existing or proposed stationary source may request an enforceable limit on the ability to emit air pollutants to avoid all permitting obligations under AS 46.14.130. A limitation approved under this section is an enforceable limitation for the purpo…

(a) This section sets out limits for certain stationary sources that become effective the day after the department receives a request containing all the required information. Under these "preapproved" emission limits or PAEL's, no additional department approval is required. The o…

(a) If an unavoidable emergency, malfunction, or nonroutine repair causes emissions in excess of a technology-based emission standard, the owner, operator, or permittee shall (1) take all reasonable steps to minimize levels of emissions that exceed the standard; and (2) give writ…

(a) In an enforcement action, the owner, operator, or permittee has the burden of proving that excess emissions were unavoidable. This demonstration is a condition to obtaining relief under (d), (e), and (f) of this section. (b) Excess emissions violations that the department det…

(a) The department or a local air quality control program may declare an air quality episode and prescribe and publicize curtailment action if the concentration of an air pollutant in the ambient air has reached, or is likely in the immediate future to reach, any of the concentra…

(a) The department or a local air quality control program may declare an air quality episode and prescribe and publicize the actions to be taken if the concentration of PM-2.5 in the ambient air has reached, or is likely in the immediate future to reach, any of the concentrations…

(a) Except for the Class I areas identified in 18 AAC 50.015(c), the class of any geographical area of the state can be revised. This section sets out the procedures and criteria for revising an air quality classification. (b) A geographic area that exceeds 10,000 acres and is on…

(a) For purposes of this section, the following are adopted by reference: (1) 40 C.F.R. 51.301 (Definitions), as revised as of July 1, 2007, except that (A) "fugitive emissions" has the meaning given in 18 AAC 50.990; (B) "major stationary source" has the meaning given in AS 46.1…

In accordance with Volume II, Section III.K.13.H. of the State Air Quality Control Plan, adopted by reference in 18 AAC 50.030, in addition to meeting all requirements in 18 AAC 50 as applicable, all stationary sources that require a permit, are located or operating within the ar…

(a) If an electronic form is available within the permittee portal for records or information required by the department, a person shall submit that information electronically using the designated form. The department will post, on its air quality Internet website, a list of reco…

(a) Regardless of permit of classification, as of {September 7, 2022}, all stationary sources operating in the state shall report actual emissions as required under this chapter to the department, either upon request or to meet individual permit requirements, in order for the sta…

Notes 18 AAC 50.300 Eff. 1/18/97, Register 141; am 6/21/98, Register 146; am 2/2/2002, Register 161; am 5/3/2002, Register 162; repealed 10/1/2004, Register 171 State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our mo…

(a) An air quality permit that is effective under this chapter as of October 1, 2004 remains in effect until it (1) expires, consistent with AS 46.14.230; (2) is revoked by the department under AS 46.14.280; or (3) is replaced by a permit issued under this chapter. (b) For a perm…

(a) An owner or operator must obtain a construction permit before beginning actual construction of a new major stationary source, a major modification, a PAL major modification, or a new stationary source or modification subject to the construction permitting requirements of 42 U…

Notes 18 AAC 50.305 Eff. 1/18/97, Register 141; repealed 10/1/2004, Register 171 State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will…

(a) An owner or operator must obtain a prevention of significant deterioration (PSD) permit under this section before beginning actual constriction of a new major stationary source, a major modification, or a PAL major modification. (b) To satisfy the requirement of (a) of this s…

Notes 18 AAC 50.310 Eff. 1/18/97, Register 141; repealed 10/1/2004, Register 171 State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will…

(a) In accordance with the provisions of 40 C.F.R. 51.165, as adopted by reference in 18 AAC 50.040, before commencing construction of a major stationary source, major modification, or PAL major modification for a nonattainment pollutant in a nonattainment area, an owner or opera…

Notes 18 AAC 50.315 Eff. 1/18/97, Register 141; am 6/21/98, Register 146; am 7/11/2002, Register 163; repealed 10/1/2004, Register 171 State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the …

(a) Applicability. The owner or operator of a major source of hazardous air pollutants subject to a standard under 40 C.F.R. Part 63, adopted by reference in 18 AAC 50.040, must obtain a construction permit before (1) constructing a new major source of hazardous air pollutants su…

Notes 18 AAC 50.320 Eff. 1/18/97, Register 141; repealed 10/1/2004, Register 171 State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will…

(a) Purpose. This section implements EPA requirements for case-by-case maximum achievable control technology (MACT) determinations under 42 U.S.C. 7412(g) (Clean Air Act, sec. 112(g) in 40 C.F.R. 63.40 - 63.44, adopted by reference in 18 AAC 50.040. (b) Applicability. This sectio…

Notes 18 AAC 50.322 Eff. 1/18/97, Register 141; repealed 10/1/2004, Register 171 State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will…