Link to an amendment published at 89 FR 42814, May 16, 2024.

(a) Purpose and scope. This section sets forth the applicable State implementation plan for Delaware under section 110 of the Clean Air Act, 42 U.S.C. 7410, 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 25, 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. Entries in paragraphs (c) and (d) of this section with the EPA approval dates after May 25, 2018 for the State of Delaware have been approved by EPA for inclusion in the State implementation plan and for incorporation by reference into the plan as it is contained in this section, and will be considered by the Director of the Federal Register for approval 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.

(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 May 25, 2018 for the State of Delaware 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 67410, Dec. 7, 1998] Editorial Note:For Federal Register citations affecting § 52.420, see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and at www.govinfo.gov.

The Delaware plan was evaluated on the basis of the following classifications:

[37 FR 10856, May 31, 1972, as amended at 39 FR 16345, May 8, 1974]

(a) With the exceptions set forth in this subpart, the Administrator approves Delaware'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.

(b) Letter of February 26, 1993, from the Delaware Department of Natural Resources and Environmental Control transmitting a commitment to adopt either the Federal clean fuel fleet program or an alternative substitute program by May 15, 1994.

[45 FR 14558, Mar. 6, 1980, as amended at 58 FR 50848, Sept. 29, 1993; 78 FR 33984, June 6, 2013]

EPA approves as a revision to the Delaware State Implementation Plan the 1990 base year emission inventories for the Delaware ozone nonattainment areas submitted by the Secretary of the Department of Natural Resources and Environmental Control on May 27, 1994. This submittal consists of the 1990 base year point, area, non-road mobile, biogenic and on-road mobile source emission inventories in area for the following pollutants: volatile organic compounds (VOC), carbon monoxide (CO), and oxides of nitrogen (NOX).

(a) [Reserved]

(b) EPA approves as a revision to the Delaware State Implementation Plan the 2002 base year emissions inventories for the Delaware portion of the Philadelphia 1997 8-hour ozone moderate nonattainment area submitted by the Secretary of the Department of Natural Resources and Environmental Control on June 13, 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).

(c) EPA approves as a revision to the Delaware State Implementation Plan for the 2002 base year emissions inventory for the Delaware 1997 annual fine particulate matter (PM2.5) nonattainment area submitted by the Delaware Department of Natural Resources and Environmental Control on April 3, 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).

(d) EPA approves as a revision to the Delaware State Implementation Plan the comprehensive emissions inventory for the Delaware portion of the Philadelphia-Wilmington, PA-NJ-DE 2006 24-hour fine particulate matter (PM2.5) nonattainment area submitted by the Delaware Department of Natural Resources and Environmental Control on December 12, 2012. The 2007 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 for New Castle County, Delaware. The pollutants that comprise the inventory are nitrogen oxides (NOX), volatile organic compounds (VOCs), PM2.5, ammonia (NH3), and sulfur dioxide (SO2).

(e) EPA approves as a revision to the Delaware State Implementation Plan the 2011 base year emissions inventory for New Castle and Sussex Counties for the 2008 8-hour ozone national ambient air quality standard submitted by the Delaware Department of the Natural Resources and Environmental Control on April 23, 2015. The 2011 base year emissions inventory includes emissions estimates that cover the general source categories of point sources, nonroad mobile sources, area sources, onroad mobile sources, and biogenic sources. The pollutants that comprise the inventory are nitrogen oxides (NOX), volatile organic compounds (VOC), and carbon monoxide (CO).

[61 FR 1841, Jan. 24, 1996, as amended at 75 FR 17865, Apr. 8, 2010; 78 FR 14022, Mar. 4, 2013; 79 FR 45353, Aug. 5, 2014; 80 FR 59054, Oct. 1, 2015]

(a)-(d) [Reserved]

[62 FR 27197, May 19, 1997, as amended at 63 FR 1368, Jan. 9, 1998; 63 FR 16435, Apr. 3, 1998; 64 FR 32189, June 16, 1999; 64 FR 52660, Sept. 30, 1999; 64 FR 55141, Oct. 12, 1999; 66 FR 9211, Feb. 7, 2001; 66 FR 32234, June 14, 2001]

(a) Based upon EPA's review of the air quality data for the 3-year period 2008 to 2010, EPA determined that Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE 8-hour ozone moderate nonattainment area (the Philadelphia Area) attained the 1997 8-hour ozone National Ambient Air Quality Standard (NAAQS) by the applicable attainment date of June 15, 2011. 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 Philadelphia Area nonattainment area will not be reclassified for failure to attain by its applicable attainment date under section 181(b)(2)(A).

(b) Based upon EPA's review of the air quality data for the 3-year period 2007 to 2009, EPA determined that the Philadelphia-Wilmington, PA-NJ-DE 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 Philadelphia-Wilmington, PA-NJ-DE PM2.5 nonattainment area is not subject to the consequences of failing to attain pursuant to section 179(d).

(c) The EPA has determined, as of June 3, 2016, that based on 2012 to 2014 ambient air quality data, the Seaford, DE 2008 ozone Marginal nonattainment area has attained the 2008 ozone NAAQS by the applicable attainment date of July 20, 2015. Therefore, the EPA has met the requirement pursuant to CAA section 181(b)(2)(A) to determine, based on the area's air quality data as of the attainment date, whether the area attained the standard. The EPA also determined that the Seaford nonattainment area will not be reclassified for failure to attain by its applicable attainment date under section 181(b)(2)(A).

(d) Based upon EPA's review of the air quality data for the 3-year period 2013 to 2015, Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE 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 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 Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE marginal ozone nonattainment area will not be reclassified for failure to attain by its applicable attainment date pursuant to section 181(b)(2)(A).

[77 FR 17343, Mar. 26, 2012, as amended at 77 FR 28784, May 16, 2012; 81 FR 26709, May 4, 2016; 82 FR 50819, Nov. 2, 2017]

(a) EPA fully approves, as a revision to the Delaware State Implementation Plan, the 15 Percent Rate of Progress Plan for the Delaware portion of the Philadelphia-Wilmington-Trenton severe ozone nonattainment, namely Kent and New Castle Counties, submitted by the Secretary of Delaware Department of Natural Resources and Environmental Control on February 17, 1995.

(b)(1) EPA approves revisions to the Delaware State Implementation Plan consisting of the Post 1996 ROP plans for milestone years 1999, 2002, and 2005 for the Delaware portion of the Philadelphia-Wilmington-Trenton severe ozone nonattainment area, namely Kent and New Castle Counties. These revisions were submitted by the Secretary of Delaware Department of Natural Resources and Environmental Control on December 29, 1997, and revised on June 17, 1999, February 3, 2000, and December 20, 2000.

(2) EPA approves Delaware's contingency plans for failure to meet ROP in the Delaware portion of the Philadelphia-Wilmington-Trenton severe ozone nonattainment area, namely Kent and New Castle Counties, for milestone years 1999, 2002 and 2005. These revisions were submitted by the Secretary of Delaware Department of Natural Resources and Environmental Control on December 29, 1997, June 17, 1999, February 3, 2000, and December 20, 2000.

(c) EPA approves the attainment demonstration SIP for the Philadelphia-Wilmington-Trenton area submitted by the Secretary of the Delaware Department of Natural Resources and Environmental Control on May 22, 1998, and amended October 8, 1998, January 24, 2000, December 20, 2000, and October 9, 2001 including its RACM analysis and determination. EPA is approving the enforceable commitments made to the attainment plan for the Philadelphia-Wilmington-Trenton severe ozone nonattainment area submitted by the Secretary of Delaware Department of Natural Resources and Environmental Control on January 24, 2000 and December 20, 2000. The enforceable commitments are to:

(1) Submit measures by October 31, 2001 for additional emission reductions as required in the attainment demonstration test, and to revise the SIP and motor vehicle emissions budgets by October 31, 2001 if the additional measures affect the motor vehicle emissions inventory,

(2) [Reserved]

(3) Perform a mid-course review by December 31, 2003.

(d) EPA is approving the following mobile budgets, explicitly quantified as sub-budgets for each of Kent and New Castle Counties, of the Post 1996 ROP Plans and the 1-Hour Ozone Attainment Demonstration Plan:

(1)-(2) [Reserved]

(e) EPA approves Delaware's revised 2005 VOC and NOX motor vehicle emission budgets for the 1-hour ozone attainment plan for the Delaware portion of the Philadelphia-Wilmington-Trenton severe ozone nonattainment area as a SIP revision. The revisions were submitted by the Delaware Department of Natural Resources and Environmental Control on September 2, 2003. Submittal of these revised MOBILE6-based motor vehicle emissions budgets was a requirement of EPA's approval of the attainment demonstration under paragraph (c) of this section.

(f) Based upon EPA's review of the air quality data for the 3-year period 2003 to 2005, EPA has determined that the Philadelphia-Wilmington-Trenton 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 Philadelphia-Wilmington-Trenton severe 1-hour ozone nonattainment area is not subject to the imposition of the section 185 penalty fees.

(g) EPA approves revisions to the Delaware State Implementation Plan consisting of the 2008 reasonable further progress (RFP) plan, reasonably available control measures, and contingency measures for the Delaware portion of the Philadelphia 1997 8-hour ozone moderate nonattainment area submitted by the Secretary of the Department of Natural Resources and Environmental Control on June 13, 2007.

(h) EPA approves the following 2008 RFP motor vehicle emissions budgets (MVEBs) for the Delaware portion of the Philadelphia 1997 8-hour ozone moderate nonattainment area submitted by the Secretary of the Department of Natural Resources and Environmental Control on June 13, 2007:

(i) Determination of attainment. EPA has determined, as of March 26, 2012, that based on 2008 to 2010 ambient air quality data, Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE 8-hour ozone moderate nonattainment area has attained the 1997 8-hour ozone 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 annual 8-hour ozone NAAQS.

[64 FR 55141, Oct. 12, 1999, as amended at 66 FR 54614, Oct. 29, 2001; 68 FR 67952, Dec. 5, 2003; 73 FR 43361, July 25, 2008; 75 FR 17865, Apr. 8, 2010; 77 FR 17343, Mar. 26, 2012]

(a) Determination of attainment. EPA has determined, as of May 16, 2012, that based on 2007 to 2009 and 2008 to 2010 ambient air quality data, the Philadelphia-Wilmington, PA-NJ-DE nonattainment area has attained the 1997 annual PM2.5 NAAQS. This determination, in accordance with 40 CFR 51.1004(c), 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 annual PM2.5 NAAQS.

(b) Determination of Attainment. EPA has also determined, as of January 7, 2013, that based on 2008 to 2010 and 2009 to 2011 ambient air quality data, the Philadelphia-Wilmington, PA-NJ-DE fine particulate matter (PM2.5) nonattainment area has attained the 2006 24-hour PM2.5 national ambient air quality standards (NAAQS). This determination suspends the requirements for the State of DE to submit, for the Philadelphia-Wilmington, PA-NJ-DE PM2.5 nonattainment area, 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 2006 24-hour PM2.5 NAAQS.

(c) EPA approves the attainment plan for the 1997 annual fine particulate matter (PM2.5) national ambient air quality standard (NAAQS) for the Philadelphia-Wilmington, Pennsylvania-New Jersey-Delaware nonattainment area submitted by the Secretary of the Delaware Department of Natural Resources and Environmental Control on April 3, 2008, as amended on April 25, 2012. The attainment plan includes the attainment demonstration and motor vehicle emission budgets in tons per year (tpy) used for transportation conformity purposes for New Castle County, Delaware. The attainment plan also includes an analysis of reasonably available control measures and reasonably available control technology, contingency measures and the 2002 base year emissions inventory. The 2002 base year emissions inventory was approved in a separate rulemaking action on March 4, 2013 (78 FR 10420).

(d) EPA approves the maintenance plan for the Delaware portion of the Philadelphia-Wilmington, PA-NJ-DE PM2.5 Nonattainment Area (New Castle County) for the 1997 annual fine particulate matter (PM2.5) national ambient air quality standard (NAAQS) submitted by the Secretary of the Delaware Department of Natural Resources and Environmental Control on December 12, 2012. The maintenance plans include motor vehicle emission budgets in tons per year (tpy) used for transportation conformity purposes for New Castle County, Delaware.

(e) EPA approves the maintenance plan for the Delaware portion of the Philadelphia-Wilmington, PA-NJ-DE PM2.5 Nonattainment Area (New Castle County) for the 2006 24-hour fine particulate matter (PM2.5) national ambient air quality standard (NAAQS) submitted by the Secretary of the Delaware Department of Natural Resources and Environmental Control on December 12, 2012. The maintenance plans include motor vehicle emission budgets in tons per year (tpy) used for transportation conformity purposes for New Castle County, Delaware.

[77 FR 28784, May 16, 2012, as amended at 78 FR 885, Jan. 7, 2013; 78 FR 76211, Dec. 17, 2013; 79 FR 45353, Aug. 5, 2014]

On March 24, 1994 the Delaware Department of Natural Resources & Environmental Control 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 Delaware SIP. As with all components of the SIP, Delaware must implement the program as submitted and approved by EPA.

[60 FR 47084, Sept. 11, 1995]

(a) [Reserved]

(b) Regulation for preventing significant deterioration of air quality. The provisions of 52.21(p) are hereby incorporated and made a part of the applicable State plan for the State of Delaware.

(c) All applications submitted as of that date and supporting information required pursuant to § 52.21 from sources located in the State of Delaware shall be submitted to: Delaware Department of Natural Resources and Environmental Control, Air Resources Section, Division of Environmental Control, 89 Kings Highway, P.O. Box 1401, Dover, Delaware 19901.

[78 FR 33984, June 6, 2013]

(a) Disapproval. EPA is disapproving Delaware's October 15, 2013 submittal of revisions to 7 DNREC 1125, sections 2.5.5 and 2.5.6 because it does not meet Clean Air Act (CAA) requirements which establish the criteria under which the owner or operator of a new or modified major stationary source must obtain the required emission offsets for the nonattainment new source review (NSR) preconstruction permitting program and because Delaware exercises authorities that are reserved for EPA under section 107 of the CAA. Delaware's Federally-approved nonattainment NSR preconstruction program in 7 DNREC 1125, sections 1.0 through 3.16.4, effective in Delaware on February 11, 2012, was fully-approved by EPA on October 2, 2012 and continues to apply.

(b) [Reserved]

[81 FR 72537, Oct. 20, 2016]

(a)(1) The owner and operator of each source located within the State of Delaware 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 Delaware 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 State's SIP, the Administrator has already allocated CAIR NOX allowances to sources in the State 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 State of Delaware 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 Delaware 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 State's SIP, the Administrator has already allocated CAIR NOX Ozone Season allowances to sources in the State 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 62344, 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 State of Delaware 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 Delaware 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) On January 11, 1993, the Director of the Delaware Department of Natural Resources and Environmental Control submitted a plan for the establishment and implementation of a Small Business Stationary Source Technical and Environmental Compliance Assistance Program as a State Implementation Plan revision, as required by title V of the Clean Air Act. EPA approved the Small Business Stationary Source Technical and Environmental Compliance Assistance Program on May 17, 1994, and made it a part of the Delaware SIP. As with all components of the SIP, Delaware must implement the program as submitted and approved by EPA.

[59 FR 25572, May 17, 1994]

(a) This section identifies the original “Air Implementation Plan for the State of Delaware” and all revisions submitted by Delaware 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) editions revised as of July 1, 2012.

(b) [Reserved]

[78 FR 33984, June 6, 2013]