(a) Purpose and scope. This section sets forth the applicable State implementation plan for Guam under section 110 of the Clean Air Act, 42 U.S.C. 7401-7671q and 40 CFR part 51 to meet national ambient air quality standards.

(b) Incorporation by reference. (1) Material listed in paragraphs (c) and (d) of this section with an EPA approval date prior to January 1, 2005, was approved for incorporation by reference by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Material is incorporated as it exists on the date of the approval, and notice of any change in the material will be published in the Federal Register. Entries in paragraphs (c) and (d) of this section with EPA approval dates after January 1, 2005, will be incorporated by reference in the next update to the SIP compilation.

(2) EPA Region IX certifies that the rules/regulations provided by EPA in the SIP compilation at the addresses in paragraph (b)(3) of this section are an exact duplicate of the officially promulgated State rules/regulations which have been approved as part of the State implementation plan as of January 1, 2005.

(3) Copies of the materials incorporated by reference may be inspected at the Region IX EPA Office at 75 Hawthorne Street, San Francisco, CA 94105; the Air and Radiation Docket and Information Center, U.S. Environmental Protection Agency, 1301 Constitution Avenue, NW., Room B108, Washington, DC; or the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call (202) 741-6030, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.

(c) EPA approved regulations.

(d) EPA approved State source specific requirements.

(e) EPA Approved Nonregulatory Provisions and Quasi-Regulatory Measures.

[70 FR 20475, Apr. 20, 2005; 70 FR 21496, Apr. 26, 2005, as amended at 71 FR 9719, Feb. 27, 2006; 80 FR 8548, Feb. 18, 2015; 90 FR 31880, July 16, 2025; 90 FR 44989, Sept. 18, 2025]

The Guam plan was evaluated on the basis of the following classifications.

With the exceptions set forth in this subpart, the Administrator approves Guam's plan for the attainment and maintenance of the National Standards.

[46 FR 25303, May 6, 1981]

(a) This section identified the original “Implementation Plan for Compliance With the Ambient Air Quality Standards for the Territory of Guam” and all revisions submitted by the Territory of Guam that were federally approved prior to January 1, 2005.

(b) The plan was officially submitted on January 25, 1972.

(c) The plan revision listed below was submitted on the date specified.

(1) Revised implementation plan submitted on August 14, 1973, by the Governor.

Section I—Public hearing. Section II—Introduction. Section III—Legal authority (narrative). Section IV—Ambient air quality standards and air pollution control regulations (narrative). Section V—Emissions inventory. Section VI—Air quality data. Section VIII (B and C)—Control strategies. Section IX—Complex sources (narrative). Section X—Air quality surveillance network (narrative). Section XI—Source surveillance system (narrative). Section XIII—Compliance schedule. Section XV—Resources. Section XVI—Intergovernmental cooperation (narrative). Appendix A—Notice and minutes of public hearing. Appendix C—Pub. L. 11-191 (enacted on December 7, 1972). Appendix E (Regulations): Chapter 1, Definitions: 1.1-1.8, 1.10-1.14, 1.16, 1.19, and 1.21-1.32. Chapter 2, Ambient Air Quality Standards: 2.1 and 2.2. Chapter 3, Permits (for complex sources only): 3.1-3.13. Chapter 4, Monitoring, Records, and Reporting: 4.2, and 4.4. Chapter 5, Sampling and Testing: 5.3. Chapter 6, Control of Open Burning: 6.2(g)(1-3). Chapter 7, Control of Particulate Emission from Process Industries: 7.1-7.4 (7.1 and 7.6 deleted without replacement). Chapter 8, Control of Fugitive Dust: 8.1-8.9. Chapter 10, Control of Visible Emissions: 10.1(b) and the deletion of 10.1(c). Chapter 14, Motor Vehicle Pollution Controls: 14.1-14.7. Chapter 15, Appeal Procedures, Circumvention, Severability, and Effective Date: 15.1-15.4 Appendix F—Summary of air quality data. Appendix G—Steam powerplant parameters. Appendix H—Diffusion model computer printout. Appendix J—Minutes and letters of public hearing on compliance schedules. Appendix K—Emissions inventory data.

(2) Amendments to the Guam Air Pollution Control Standards and Regulation submitted on October 12, 1979 by the Governor's designee.

(i) Chapter 13—Control of Sulfur Dioxide Emission, 13.3, 13.4.

(ii) Deleted without replacement Rule 13.3 (submitted January 25, 1972).

(iii) Chapters 1 (except 1.18 and 1.19), 4, 10, 12 and 14; Rules 3.1-3.9, 5.3, 6.2, 7.1, 7.4, 7.5, 8.3-8.7, 13.1, 13.2 and 18.1-18.4; and deletion of Rules 3.12, 3.17 and 12.3.

(3) Amendments to the Guam Air Pollution Control Standards and Regulations submitted on April 1, 1980 by the Governor's designee.

(i) Addendum to 13.1—Compliance Order for the Guam Power Authority's Power Barge “Inductance”.

(4) Amendments to the Guam Air Pollution Control Standards and Regulations submitted on January 6, 1982 by the Governor's designee.

(i) Chapter 17—Appeals Procedures, Circumvention, Severability, and Effective Date.

(5) Amendments to the Guam Air Pollution Control Standards and Regulations submitted on June 30, 1982 by the Governor's designee.

(i) “Territory of Guam NAP for SO2,” consisting of the narrative or Control Strategy portion of the Piti NAP; Addendum B, “Preliminary Results of SO2 Dispersion Modeling;” and “Official Report of Public Hearing.” The remaining portions of the addenda are for informational purposes only.

Editorial Note:At 50 FR 2820, Jan. 22, 1985, the following paragraph (c)(5) was added to § 52.2670. Redesignated as § 52.2673, at 70 FR 20475, Apr. 20, 2005.

(5) Amendments to the Guam Air Pollution Standards and Regulations submitted on May 22, 1984.

(i) Section X. Air Quality Surveillance Network.

(6) The following amendments to the plan were submitted on November 24, 1982, by the Governor.

(i) Negative declaration indicating no Lead Sources in Guam.

[37 FR 10904, May 31, 1972, as amended at 41 FR 8968, Mar. 2, 1976; 43 FR 48639, Oct. 19, 1978; 43 FR 59067, Dec. 19, 1978; 45 FR 14560, Mar. 6, 1980; 46 FR 26303, May 12, 1981; 47 FR 43054, Sept. 30, 1982; 49 FR 20496, May 15, 1984; 50 FR 2820, Jan. 22, 1985; 50 FR 32698, Aug. 14, 1985. Redesignated and amended at 70 FR 20475, Apr. 20, 2005]

(a) The requirements of sections 160 through 165 of the Clean Air Act are not met, since the plan does not include approvable procedures for preventing the significant deterioration of air quality.

(b) Regulations for preventing significant deterioration of air quality. The provisions of § 52.21 except paragraph (a)(1) are hereby incorporated and made a part of the applicable State plan for the State of Guam.

[43 FR 26410, June 19, 1978, as amended at 45 FR 52741, Aug. 7, 1980; 68 FR 11325, Mar. 10, 2003; 68 FR 74491, Dec. 24, 2003]

(a) The requirements of § 51.110(a) and subpart G of this chapter are not met since the plan does not provide for the attainment and maintenance of the national standards.

(b) Chapter 6, Regulations 6.2(g)(1-3) of the “Guam Air Pollution Control Standards and Regulations” (control of open burning—agricultural crops) are disapproved since they do not provide criteria upon which to base the approval or denial of permit requests.

(c) The following rules are disapproved because they could allow an emissions increase, and a control strategy demonstration has not been submitted showing that any increased emissions would not interfere with the attainment or maintenance of the NAAQS.

(1) Rule 8.7, submitted on October 12, 1979.

[43 FR 59067, Dec. 19, 1978, as amended at 46 FR 26303, May 12, 1981; 51 FR 40676, Nov. 7, 1986]

(a) Approvals of the following rules are limited to specific sources, since a control strategy demonstration has not been submitted showing that any increased emissions would not interfere with the attainment or maintenance of the NAAQS.

(1) Rule 13.1, submitted on October 12, 1979, for all applicable sources except the Tanguisson Power Plant.

(2) Rule 13.2, submitted on January 25, 1972, for the Tanguisson Power Plant.

(b) The following rules are disapproved because they are inconsistent with section 123(a)(2) of the Clean Air Act which requires continuous control strategies.

(1) Rule 13.2, submitted on October 12, 1979.

(c) Effective October 20, 2025, the EPA has determined, that based on air dispersion modeling, the Piti-Cabras nonattainment area has attained the 2010 1-hour sulfur dioxide NAAQS. This clean data determination suspends the requirement for this area to submit an attainment demonstration, associated reasonably available control measures, including reasonably available control technology, a reasonable further progress plan, emissions limitations and control measures as necessary to provide for attainment, and contingency measures, for as long as this area continues to meet the 2010 1-hour sulfur dioxide NAAQS.

[46 FR 26304, May 6, 1981, as amended at 90 FR 44987, Sept. 18, 2025]

(a) The requirements of § 51.27(a)(2) of this chapter as of December 19, 1978 (43 FR 59067), are not met. In addition, Chapter 1, Regulation 1.8 and Chapter 5, Regulation 5.3 of the “Guam Air Pollution Control Standards and Regulations” (buffer zones—air quality sampling) are not in conformance with the intent of the Clean Air Act and the definition of “ambient air” promulgated at § 50.1(e) of this chapter. Regulations 1.8 and 5.3 are disapproved because they could prohibit ambient air quality sampling at places of expected maximum concentration and/or at places where the public has access.

[43 FR 59067, Dec. 19, 1978, as amended at 51 FR 40677, Nov. 7, 1986]

(a) The requirements of § 51.214 and Appendix P of this chapter are not met since the plan does not contain sufficient regulations pertaining to continuous in-stack monitoring.

[43 FR 59067, Dec. 19, 1978, as amended at 51 FR 40677, Nov. 7, 1986]

(a) Chapter 4, Regulation 4.4 of the “Guam Air Pollution Control Standards and Regulations” (reporting of upsets and breakdowns) is disapproved since criteria for further enforcement action are not specified, thus permitting the Guam Administratorunlimited discretion.

[43 FR 59067, Dec. 19, 1978]