Voglio sapere a riguardo di…

Federal Register / Vol. 86, No. 166 / Tuesday, August 31, 2021 / Rules and Regulations
khammond on DSKJM1Z7X2PROD with RULES

implementation period, including the August 2019 Guidance on Regional Haze State Implementation Plans for the Second Implementation Period 2019
Guidance.4
Because the air pollutants and pollution affecting visibility in Class I
areas can be transported over long distances, successful implementation of the regional haze program requires longterm, regional coordination among multiple jurisdictions and agencies that have responsibility for Class I areas and the emissions that impact visibility in those areas. In order to address regional haze, states need to develop strategies in coordination with one another, considering the effect of emissions from one jurisdiction on the air quality in another. Five regional planning organizations RPOs, which include representation from state and tribal governments, EPA, and federal land managers FLMs, were developed in the lead-up to the first implementation period to address regional haze. RPOs evaluate technical information to better understand how emissions from state and tribal land impact Class I areas across the country, pursue the development of regional strategies to reduce emissions of particulate matter and other pollutants leading to regional haze, and help states meet the consultation requirements of the RHR.
One of the five RPOs described above is the Mid-Atlantic/Northeast Visibility Union MANEVU. MANEVU is a collaborative effort of state governments, tribal governments, and various Federal agencies established to initiate and coordinate activities associated with the management of regional haze, visibility, and other air quality issues in the MidAtlantic and Northeast corridor of the United States. The District, as well as other states and tribal governments along the Mid-Atlantic and Northeast corridor, are members of MANEVU.
EPA published a final rule fully approving the DC regional haze SIP
submission for the first implementation period on February 2, 2012 77 FR
5191, and approved a five-year progress report as a SIP revision into the DC SIP
on August 10, 2017 82 FR 37305. On November 8, 2019, the District submitted another SIP revision, developed with the technical information from MANEVU, to address the jurisdictions regional haze 4 Guidance on Regional Haze State Implementation Plans for the Second Implementation Period. Available at: https
www.epa.gov/visibility/guidance-regional-hazestate-implementation-plans-secondimplementation-period EPA Office of Air Quality Planning and Standards, Research Triangle Park August 20, 2019.

VerDate Sep<11>2014

19:07 Aug 30, 2021

Jkt 253001

obligations for the second implementation period, which runs through 2028. On April 15, 2021, EPA
proposed to approve the DC DOEE 2019
Regional Haze SIP submission as meeting the applicable statutory and regulatory requirements. 86 FR 19793.
In the April 15, 2021 publication, EPA
also proposed to correct an error in the citations of the regulatory provisions in a previous actionthe final rule FR
and identification of plan of the DC NOx RACT rule February 24, 2020, 85 FR
10295according to our authority to make corrections to prior SIP actions under Section 110k6 of the CAA. As we noted in the NPRM, the DC DOEE
2019 Regional Haze SIP submission relies in part on this rule.
II. Summary of SIP Revision and EPA
Analysis Under the CAA and EPAs regulations, each state, including the District, must include in its SIP a longterm ten to fifteen years strategy for making reasonable progress toward meeting the national goal of remedying any existing and preventing any future anthropogenic visibility impairment in Class I areas. 42 U.S.C. 7491b2B. To this end, 40 CFR 51.308f lays out the process by which states determine what constitutes their long-term strategies, with the order of the requirements in 40
CFR 51.308f1 through 3 generally mirroring the order of the steps in the reasonable progress analysis and f4
through 6 containing additional, related requirements. In addition, the SIP submissions for the second implementation period must address the requirements in 40 CFR 51.308g1
through 5 pertaining to periodic reports describing progress towards the RPGs, 40 CFR 51.308f5, as well as requirements for FLM consultation that apply to all visibility protection SIPs and SIP revisions. 40 CFR 51.309i.
As discussed in the April 15, 2021 86
FR 19793 NPRM, in accordance with CAA sections 169A and the RHR at 40
CFR 51.308f, on November 8, 2019, DC
DOEE submitted a revision to the DC
SIP to address the jurisdictions regional haze obligations for the second implementation period. The revision included the analyses conducted by MANEVU and the Districts determinations based on those analyses;
the Districts long-term strategy for making reasonable progress; and the Districts assessment of progress made since the first implementation period in reducing emissions of visibility impairing pollutants and the visibility improvement progress at nearby Class I
areas. EPA evaluated the Districts submission against the requirements of
PO 00000

Frm 00023

Fmt 4700

Sfmt 4700

48505

the CAA and RHR for the second implementation period of the regional haze program. The following is a summary of selected components of the Districts SIP submission; EPAs full evaluation of the complete submission against all applicable regional haze requirements for the second implementation period is contained in Section IV of the April 15, 2021 NPRM.
The core component of a regional haze SIP submission is a long-term strategy that addresses regional haze in each Class I area within a states borders and each Class I area that may be affected by emissions from the state.
The long-term strategy must include the enforceable emissions limitations, compliance schedules, and other measures that are necessary to make reasonable progress, as determined pursuant to 40 CFR 51.308f2i through iv. 40 CFR 51.308f2. The amount of progress that is reasonable progress is determined by applying the four statutory factors in CAA section 169Ag1 in an evaluation of potential control options for sources of visibility impairing pollutants, which is referred to as a four-factor analysis. The RHR
refers to the controls identified pursuant to a four-factor analysis as emission reduction measures, see 40 CFR
51.308f2i; these measures represent the level of emissions that a particular source or group of sources need to achieve to make reasonable progress towards the national visibility goal.
States SIPs must include enforceable emissions limitations, compliance schedules, and other measures i.e., any compliance tools for the emission reduction measures they have determined are necessary to make reasonable progress pursuant to fourfactor analysis. 40 CFR 51.308f2.
MANEVUs strategy, on which the District relied to satisfy its requirements for the second implementation period, included a combination of 1 measures for certain source sectors and groups of sources that the RPO determined were reasonable for states to pursue, and 2
a request for member states to conduct four-factor analyses for individual sources that it identified as contributing to visibility impairment. MANEVU
developed a set of emissions reduction measures for making reasonable progress in the five MANEVU Class I
areas. MANEVU refers to each of the components of its overall strategy as an Ask of its member states. The Districts submission discussed each of the Asks and explained why or why not each is applicable and how it has complied with the relevant components of the emissions control strategy MANEVU has laid out for its states. A

E:FRFM31AUR1.SGM

31AUR1