(a) Purpose and scope. This section sets forth the applicable State implementation plan for the District of Columbia under section 110 of the Clean Air Act (42 U.S.C. 7401) 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 May 14, 2018, 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 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 the EPA approval dates after May 14, 2018 for the District of Columbia, will be incorporated by reference in the next update to the SIP compilation.

(2) EPA Region III certifies that the materials provided by EPA 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 the dates referenced in paragraph (b)(1) of this section. No additional revisions were made to paragraph (d) of this section between July 1, 2016 and May 14, 2018.

(3) Copies of the materials incorporated by reference into the State implementation plan may be inspected at the Environmental Protection Agency, Region III, 1650 Arch Street, Philadelphia, Pennsylvania 19103. To obtain the material, please call the Regional Office at (215) 814-3376. You may also inspect the material with an EPA approval date prior to July 1, 2016 for the District of Columbia at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, go to: http://www.archives.gov/federal-register/cfr/ibr-locations.html.

(c) EPA-approved regulations.

(d) EPA-approved State source-specific requirements.

(e) EPA-approved non-regulatory and quasi-regulatory material.

[63 FR 67417, Dec. 7, 1998] Editorial Note:For Federal Register citations affecting § 52.470, see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and at www.govinfo.gov.

The District of Columbia plan was evaluated on the basis of the following classifications:

[37 FR 10857, May 31, 1972, as amended at 39 FR 16346, May 8, 1974; 46 FR 61263, Dec. 16, 1981]

(a) With the exceptions set forth in this subpart, the Administrator approves the District of Columbia's plan for the attainment and maintenance of the national standards.

(b) [Reserved]

(c) With the exceptions set forth in this subpart, the Administrator approves the District of Columbia's plan for the attainment and maintenance of the national standards under section 110 of the Clean Air Act. Furthermore, the Administrator finds that the plan satisfies all requirements of Part D, Title 1, of the Clean Air Act as amended in 1977.

(d) Section 710 of title 20 of the District of Columbia Regulations is approved with the following condition: Any alternative controls or exemptions under section 710.8 approved or granted by the District of Columbia are subject to a public notice and public hearing requirements and must be submitted to EPA as SIP revisions. Such alternatives or exemptions are not effective until approved as SIP revisions by EPA.

(e)-(f) [Reserved]

[38 FR 33709, Dec. 6, 1973, as amended at 46 FR 61263, Dec. 16, 1981; 57 FR 34251, Aug. 4, 1992; 60 FR 5136, Jan. 26, 1995; 60 FR 15486, Mar. 24, 1995; 61 FR 2936, Jan. 30, 1996; 78 FR 33984, June 6, 2013]

(a) EPA approves as a revision to the District of Columbia Implementation Plan the 1990 base year emission inventory for the Washington Metropolitan Statistical Area, submitted by Director, District of Columbia Consumer and Regulatory Affairs, on January 13, 1994 and October 12, 1995. This submittal consist of the 1990 base year stationary, area and off-road mobile and on-road mobile emission inventories in the Washington Statistical Area for the pollutant, carbon monoxide (CO).

(b) EPA approves as a revision to the District of Columbia State Implementation Plan the 1990 base year emission inventory for the District's portion of the Metropolitan Washington DC ozone nonattainment area submitted by the Director, DCRA, on January 13, 1994. This submittal consists of the 1990 base year point, area, highway mobile, non-road and biogenic source emission inventories in the area for the following pollutants: Volatile organic compounds (VOC), carbon monoxide (CO), and oxides of nitrogen (NOX).

(c) EPA approves as a revision to the District of Columbia State Implementation Plan an amendment to the 1990 base year emission inventories for the District's portion of the Metropolitan Washington, D.C. ozone nonattainment area submitted by the Director, Department of Consumer and Regulatory Affairs, on November 3, 1997. This submittal consists of amendments to the 1990 base year point, area, highway mobile, and non-road source emission inventories in the area for the following pollutants: volatile organic compounds (VOC), and oxides of nitrogen (NOX).

(d) EPA approves as a revision to the District of Columbia State Implementation Plan the 2002 base year emissions inventories for the Washington DC-MD-VA 1997 8-hour ozone moderate nonattainment area submitted by the Acting Director of the District of Columbia Department of the Environment on June 12, 2007. This submittal consists of the 2002 base year point, area, non-road mobile, and on-road mobile source inventories in area for the following pollutants: volatile organic compounds (VOC), carbon monoxide (CO) and nitrogen oxides (NOX).

(e) EPA approves as a revision to the District of Columbia State Implementation Plan the 2002 base year emissions inventory for the District of Columbia portion of the Washington DC-MD-VA 1997 fine particulate matter (PM2.5) nonattainment area submitted by the District Department of the Environment on April 2, 2008. The 2002 base year emissions inventory includes emissions estimates that cover the general source categories of point sources, non-road mobile sources, area sources, on-road mobile sources, and biogenic sources. The pollutants that comprise the inventory are nitrogen oxides (NOX), volatile organic compounds (VOCs), PM2.5, coarse particles (PM10), ammonia (NH3), and sulfur dioxide (SO2).

(f) EPA approves as a revision to the District of Columbia State Implementation Plan the 2011 base year emissions inventory for the District of Columbia portion of the Washington, DC-MD-VA 2008 8-hour ozone nonattainment area submitted by the District Department of the Environment on July 17, 2014. The 2011 base year emissions inventory includes emissions estimates that cover the general source categories of point sources, non-road mobile sources, area sources, on-road mobile sources, and biogenic sources. The pollutants that comprise the inventory are carbon monoxide (CO), nitrogen oxides (NOX) and volatile organic compounds (VOC).

[61 FR 2936, Jan. 30, 1996, as amended at 62 FR 19679, Apr. 23, 1997; 63 FR 36858, July 8, 1998; 76 FR 58118, Sept. 20, 2011; 77 FR 65631, Oct. 30, 2012; 80 FR 27258, May 13, 2015; 80 FR 43628, July 23, 2015]

(a) Based upon EPA's review of the air quality data for the 3-year period 2007 to 2009, EPA determined that the Metropolitan Washington, District of Columbia-Maryland-Virginia (DC-MD-VA) fine particle (PM2.5) nonattainment area attained the 1997 annual PM2.5 National Ambient Air Quality Standard (NAAQS) by the applicable attainment date of April 5, 2010. Therefore, EPA has met the requirement pursuant to CAA section 179(c) to determine, based on the area's air quality as of the attainment date, whether the area attained the standard. EPA also determined that the Metropolitan Washington, DC-MD-VA nonattainment area is not subject to the consequences of failing to attain pursuant to section 179(d).

(b) Based upon EPA's review of the air quality data for the 3-year period 2007 to 2009, Washington, DC-MD-VA moderate nonattainment area has attained the 1997 8-hour ozone NAAQS by the applicable attainment date of June 15, 2010. Therefore, EPA has met the requirement pursuant to CAA section 181(b)(2)(A) to determine, based on the area's air quality as of the attainment date, whether the area attained the standard. EPA also determined that the Washington, DC-MD-VA moderate nonattainment area will not be reclassified for failure to attain by its applicable attainment date pursuant to section 181(b)(2)(A).

(c) Based upon EPA's review of the air quality data for the 3-year period 2013 to 2015, the Washington, DC-MD-VA marginal ozone nonattainment area has attained the 2008 8-hour ozone national ambient air quality standard (NAAQS) by the applicable attainment date of July 20, 2016. Therefore, EPA has met the requirement pursuant to Clean Air Act section 181(b)(2)(A) to determine, based on the area's air quality as of the attainment date, whether the area attained the standard. EPA also determined that the Washington, DC-MD-VA marginal nonattainment area will not be reclassified for failure to attain by its applicable attainment date pursuant to section 181(b)(2)(A).

[77 FR 1413, Jan. 10, 2012, as amended at 77 FR 11741, Feb. 28, 2012; 82 FR 52655, Nov. 14, 2017]

(a) EPA approves as a revision to the District of Columbia State Implementation Plan the 15 Percent Rate of Progress Plan for the District of Columbia's portion of the Metropolitan Washington, D.C. ozone nonattainment area, submitted by the Director of the District of Columbia Department of Health on April 16, 1998.

(b)-(c) [Reserved]

(d) Based upon EPA's review of the air quality data for the 3-year period 2003 to 2005, EPA has determined that the Washington severe 1-hour ozone nonattainment area attained the 1-hour ozone NAAQS by the applicable attainment date of November 15, 2005. EPA also has determined that the Washington severe 1-hour ozone nonattainment area is not subject to the imposition of the section 185 penalty fees.

(e) EPA approves revisions to the District of Columbia State Implementation Plan consisting of the 2008 reasonable further progress (RFP) plan, reasonably available control measures, and contingency measures for the Washington DC-MD-VA 1997 8-hour ozone moderate nonattainment area submitted by the Acting Director of the District of Columbia Department of the Environment on June 12, 2007.

(f) EPA approves the following 2008 RFP motor vehicle emissions budgets (MVEBs) for the Washington, DC-MD-VA 1997 8-hour ozone moderate nonattainment area submitted by the Director of the Virginia Department of Environment Quality on June 12, 2007:

(g) Determination of attainment. EPA has determined, as of February 28, 2012, that based on 2007 to 2009 and 2008 to 2010 ambient air quality data, the Washington, DC-MD-VA moderate nonattainment area has attained the 1997 8-hour ozone National Ambient Air Quality Standard (NAAQS). This determination, in accordance with 40 CFR 51.918, suspends the requirements for this area to submit an attainment demonstration, associated reasonably available control measures, a reasonable further progress plan, contingency measures, and other planning SIPs related to attainment of the standard for as long as this area continues to meet the 1997 8-hour ozone NAAQS.

(h) EPA approves revisions to the District of Columbia State Implementation Plan consisting of the attainment demonstration required under 40 CFR 51.908 demonstrating attainment of the 1997 ozone NAAQS by the applicable attainment date of June 15, 2010 and the failure to attain contingency measures for the Washington, DC-MD-VA 1997 8-hour ozone moderate nonattainment area submitted by the Acting Director of the District of Columbia Department of the Environment on June 12, 2007.

(i) EPA approves the following 2009 attainment demonstration and 2010 motor vehicle emissions budgets (MVEBs) for the Washington, DC-MD-VA 1997 8-hour ozone moderate nonattainment area submitted by the Acting Director of the District of Columbia Department of the Environment on June 12, 2007:

(j) EPA approves the maintenance plan for the District of Columbia portion of the Washington, DC-MD-VA nonattainment area for the 2008 8-hour ozone NAAQS submitted by the Director of the District of Columbia Department of Energy and Environment on March 12, 2018. The maintenance plan includes 2014, 2025, and 2030 motor vehicle emission budgets (MVEBs) for VOC and NOX to be applied to all future transportation conformity determinations and analyses for the entire Washington, DC-MD-VA area for the 2008 8-hour ozone NAAQS. The maintenance plan includes two sets of VOC and NOX MVEBs: The MVEBs without transportation buffers are effective as EPA has determined them adequate for transportation conformity purposes; the MVEBs with transportation buffers will be used only as needed in situations where the conformity analysis must be based on different data, models, or planning assumptions, including, but not limited to, updates to demographic, land use, or project-related assumptions, than were used to create the set of MVEBs without transportation buffers. The technical analyses used to demonstrate compliance with the MVEBs and the need, if any, to use transportation buffers will be fully documented in the conformity analysis and follow the Transportation Planning Board's (TPB) interagency consultation procedures.

[64 FR 42602, Aug. 5, 1999, as amended at 66 FR 631, Jan. 3, 2001; 69 FR 43522, July 21, 2004; 73 FR 43361, July 25, 2008; 76 FR 58118, Sept. 20, 2011; 77 FR 11741, Feb. 28, 2012; 80 FR 19218, Apr. 10, 2015; 84 FR 15115, Apr. 15, 2019]

(a) Determination of Attainment. EPA has determined, as of January 12, 2009, that the District of Columbia portion of the Metropolitan Washington, DC-MD-VA nonattainment area for the 1997 PM2.5 NAAQS has attained the 1997 PM2.5 NAAQS. This determination, in accordance with 40 CFR 52.1004(c), suspends the requirements for this area to submit an attainment demonstration and associated reasonably available control measures, a reasonable further progress plan, contingency measures, and other planning SIPs related to attainment of the standard for as long as the area continues to attain the 1997 PM2.5 NAAQS.

(b) Maintenance Plan and Transportation Conformity Budgets. EPA approves the maintenance plan for the District of Columbia portion of the Washington, DC-MD-VA nonattainment area for the 1997 annual PM2.5 NAAQS submitted by the District of Columbia for the entire Area on June 3, 2013 and supplemented on July 22, 2013. The MVEBs are based on a tiered approach: Tier 1 MVEBs are effective as EPA has determined them adequate for transportation conformity purposes; Tier 2 mobile budgets will become effective upon the completion of the interagency consultation process and fully documented within the first conformity analysis that uses the Tier 2 MVEBs.

[79 FR 60084, Oct. 6, 2014]

(a) On April 8, 1993, the District of Columbia submitted a letter to EPA declaring that there are no sources located in the District belonging to the following VOC categories:

(1) Automobile and light-duty truck manufacturing;

(2) Coating of cans, coils, paper, fabric and vinyl, metal furniture, large appliances, magnet wire, miscellaneous metal parts and products, and flatwood paneling;

(3) Storage of petroleum liquids in fixed-roof tanks and external floating-roof tanks;

(4) Bulk gasoline plants and terminals;

(5) Petroleum refinery sources;

(6) Petroleum refinery equipment leaks;

(7) Manufacture of synthesized pharmaceutical products, pneumatic rubber tires, vegetable oil, synthetic organic chemicals (fugitive VOCs and air oxidation), and high density polyethylene, polypropylene and polystyrene resins;

(8) Graphic arts systems;

(9) Storage, transportation and marketing of VOCs (fugitive VOCs from oil and gas production and natural gas and gasoline processing).

(b) On September 4, 1997, the District of Columbia submitted a letter to EPA declaring that there are no sources located in the District which belong to the following VOC categories:

(1) Coating of plastic parts (business machines and other);

(2) Aerospace;

(3) Shipbuilding and repair;

(4) Automobile refinishing;

(5) Industrial wastewater;

(6) Distillation or reactor or batch processes in the synthetic organic chemical manufacturing industry;

(7) Volatile organic storage;

(8) Wood furniture coatings;

(9) Offset lithography;

(10) Clean-up solvents.

(c) On March 24, 2011, the District of Columbia submitted a letter to EPA declaring that there are no sources located in the District which belong to the following VOC categories:

(1) Auto and Light-duty Truck Assembly Coatings;

(2) Fiberglass Boat Manufacturing Materials;

(3) Paper, Film and Foil Coatings;

(4) Flatwood Paneling.

[64 FR 57781, Oct. 27, 1999, as amended at 78 FR 24997, Apr. 29, 2013]

(a) Approval of source-specific requirements for the Blue Plains Advanced Wastewater Treatment Plant includes EPA incorporating by reference into § 52.470(d) certain redacted portions of Permit No. 6372-C2/0 approved by the District of Columbia on April 20, 2018 to Construct and Operate New Biosolids Handling Facilities issued to the District of Columbia Water and Sewer Authority and as approved on March 25, 2020.

(1) Specifically, EPA is incorporating by reference into § 52.470(d) certain portions of Permit No. 6372-C2/O to Construct and Operate New Biosolids Handling Facilities issued to District of Columbia Water and Sewer Authority as redacted by the District of Columbia:

(i) The first paragraph citing the pertinent permitting regulations and listing (redacted) the following significant components: One (1) Auxiliary Boiler (AB) rated at 62.52 mmBTU per hour (HHV) heat input, firing DG, One (1) Siloxane Destruction Flare (SF) rated at 6.14 MMBTU per hour heal input, firing DG; and Two (2) Emergency Flares rated at 126 mmBTU per hour heat input each, firing DG.

(ii) The NOX emissions limits listed in the table found in permit condition “j.” for the Auxiliary Boiler (AB), Siloxane Destruction Flare (SF) and Two (2) Emergency Flares. The hourly NOX emission limits for the Auxiliary Boiler (AB), Siloxane Destruction Flare (SF) and Two (2) Emergency Flares listed in Table 2 (as redacted) found under Condition III.

(iii) Conditions III.b.1.A.; III.b.3. A. and B.; III.b.3. C.i., iii and iv.; III.b.3.D.; III.b.3.E. except that relating to carbon monoxide/CO; III.b.3.F. except “and CO”; III.b.3.G, iv. and v. except the provision “Failure to demonstrate compliance through the testing may result in enforcement action.”; III.b.4.A.; III.b.4.B. iv. and v.; III.b.5. as redacted to strike “in addition to complying with Condition II(f)”; III.d., III.d.1.A; III.d.2.D; III.d.3.A. only the portion “Within 60 days of initial startup and once every five years thereafter, the Permittee shall conduct a Department- approved compliance source test at multiple loads of EF-l, EF-2, and SF in accordance with 40 CFR 60.8 or a similar protocol acceptable to the Department, to demonstrate compliance with the emissions limitations contained in Condition III(d)(1) of this permit;” III.d.3.B as redacted to exclude “though additional testing may be required at other times pursuant to Condition II(d)(2)”; III.d.3.C. (i), (iii) and (iv); III.d.3.D.; III.d.3.H.(iv); III.d.3.H.(v) except “Failure to demonstrate compliance through the test may result in enforcement action.”; III.d.4.A. except “including records of visual inspections,”; III.d.4.B. (ii) except “and CO”; III.d.4.B. (iv); and, III.d.5.A. as redacted to exclude “in addition to complying with Condition II(f)”.

(2) This permit was issued April 20, 2018.

(b) [Reserved]

[85 FR 10300, Feb. 24, 2020]

On January 14, 1994 the District of Columbia's Department of Consumer and Regulatory Affairs submitted a plan for the establishment and implementation of a Photochemical Assessment Monitoring Stations (PAMS) Program as a state implementation plan (SIP) revision, as required by section 182(c)(1) of the Clean Air Act. EPA approved the Photochemical Assessment Monitoring Stations (PAMS) Program on September 11, 1995 and made it part of the District of Columbia SIP. As with all components of the SIP, the District of Columbia must implement the program as submitted and approved by EPA.

[60 FR 47084, Sept. 11, 1995]

(a)(1) The owner and operator of each source located within the District of Columbia and for which requirements are set forth under the Federal CAIR NOX Annual Trading Program in subparts AA through II of part 97 of this chapter must comply with such applicable requirements. The obligation to comply with these requirements in part 97 of this chapter will be eliminated by the promulgation of an approval by the Administrator of a revision to the District of Columbia State Implementation Plan (SIP) as meeting the requirements of CAIR for PM2.5 relating to NOX under § 51.123 of this chapter, except to the extent the Administrator's approval is partial or conditional or unless such approval is under § 51.123(p) of this chapter.

(2) Notwithstanding any provisions of paragraph (a)(1) of this section, if, at the time of such approval of the District of Columbia's SIP, the Administrator has already allocated CAIR NOX allowances to sources in the District of Columbia for any years, the provisions of part 97 of this chapter authorizing the Administrator to complete the allocation of CAIR NOX allowances for those years shall continue to apply, unless the Administrator approves a SIP provision that provides for the allocation of the remaining CAIR NOX allowances for those years.

(b)(1) The owner and operator of each NOX source located within the District of Columbia and for which requirements are set forth under the Federal CAIR NOX Ozone Season Trading Program in subparts AAAA through IIII of part 97 of this chapter must comply with such applicable requirements. The obligation to comply with these requirements in part 97 of this chapter will be eliminated by the promulgation of an approval by the Administrator of a revision to the District of Columbia State Implementation Plan (SIP) as meeting the requirements of CAIR for ozone relating to NOX under § 51.123 of this chapter, except to the extent the Administrator's approval is partial or conditional or unless such approval is under § 51.123(ee) of this chapter.

(2) Notwithstanding any provisions of paragraph (b)(1) of this section, if, at the time of such approval of the District of Columbia's SIP, the Administrator has already allocated CAIR NOX Ozone Season allowances to sources in the District of Columbia for any years, the provisions of part 97 of this chapter authorizing the Administrator to complete the allocation of CAIR NOX Ozone Season allowances for those years shall continue to apply, unless the Administrator approves a SIP provision that provides for the allocation of the remaining CAIR NOX Ozone Season allowances for those years.

(c) Notwithstanding any provisions of paragraphs (a) and (b) of this section and subparts AA through II and AAAA through IIII of part 97 of this chapter to the contrary:

(1) With regard to any control period that begins after December 31, 2014,

(i) The provisions in paragraphs (a) and (b) of this section relating to NOX annual or ozone season emissions shall not be applicable; and

(ii) The Administrator will not carry out any of the functions set forth for the Administrator in subparts AA through II and AAAA through IIII of part 97 of this chapter; and

(2) The Administrator will not deduct for excess emissions any CAIR NOX allowances or CAIR NOX Ozone Season allowances allocated for 2015 or any year thereafter;

(3) By March 3, 2015, the Administrator will remove from the CAIR NOX Allowance Tracking System accounts all CAIR NOX allowances allocated for a control period in 2015 and any subsequent year, and, thereafter, no holding or surrender of CAIR NOX allowances will be required with regard to emissions or excess emissions for such control periods; and

(4) By March 3, 2015, the Administrator will remove from the CAIR NOX Ozone Season Allowance Tracking System accounts all CAIR NOX Ozone Season allowances allocated for a control period in 2015 and any subsequent year, and, thereafter, no holding or surrender of CAIR NOX Ozone Season allowances will be required with regard to emissions or excess emissions for such control periods.

[72 FR 62345, Nov. 2, 2007, as amended at 76 FR 48362, Aug. 8, 2011; 79 FR 71671, Dec. 3, 2014]

(a) The owner and operator of each SO2 source located within the District of Columbia and for which requirements are set forth under the Federal CAIR SO2 Trading Program in subparts AAA through III of part 97 of this chapter must comply with such applicable requirements. The obligation to comply with these requirements in part 97 of this chapter will be eliminated by the promulgation of an approval by the Administrator of a revision to the District of Columbia State Implementation Plan as meeting the requirements of CAIR for PM2.5 relating to SO2 under § 51.124 of this chapter, except to the extent the Administrator's approval is partial or conditional or unless such approval is under § 51.124(r) of this chapter.

(b) Notwithstanding any provisions of paragraph (a) of this section and subparts AAA through III of part 97 of this chapter and any State's SIP to the contrary:

(1) With regard to any control period that begins after December 31, 2014,

(i) The provisions of paragraph (a) of this section relating to SO2 emissions shall not be applicable; and

(ii) The Administrator will not carry out any of the functions set forth for the Administrator in subparts AAA through III of part 97 of this chapter; and

(2) The Administrator will not deduct for excess emissions any CAIR SO2 allowances allocated for 2015 or any year thereafter.

[72 FR 62345, Nov. 2, 2007, as amended at 76 FR 48362, Aug. 8, 2011; 79 FR 71671, Dec. 3, 2014]

(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 District of Columbia.

[43 FR 26410, June 19, 1978, as amended at 45 FR 52741, Aug. 7, 1980; 68 FR 11322, Mar. 10, 2003; 68 FR 74488, Dec. 24, 2003]

On October 22, 1993, the Administrator of the District of Columbia Environmental Regulation Administration submitted a plan for the establishment and implementation of a Small Business Technical and Environmental Compliance Assistance Program as a state implementation plan revision (SIP), as required by title V of the Clean Air Act. EPA approved the Small Business Technical and Environmental Compliance Assistance Program on August 17, 1994 and made it part of the District of Columbia SIP. As with all components of the SIP, the District of Columbia must implement the program as submitted and approved by EPA.

[59 FR 42168, Aug. 17, 1994]

(a) This section identifies the original “Air Implementation Plan for the District of Columbia” and all revisions submitted by the District of Columbia that were federally approved prior to July 1, 1998. The information in this section is available in the 40 CFR, part 52 edition revised as of July 1, 1999, the 40 CFR, part 52, Volume 1 of 2 (§§ 52.01 to 52.1018) editions revised as of July 1, 2000 through July 1, 2011, and the 40 CFR, part 52, Volume 1 of 3 (§§ 52.01 to 52.1018) edition revised as of July 1, 2012.

(b) [Reserved]

[78 FR 33984, June 6, 2013]