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Federal Register / Vol. 86, No. 137 / Wednesday, July 21, 2021 / Proposed Rules TABLE 5COMPARISON OF 2017 NEI ACTUAL EMISSIONS AND 2018 PROJECTED EMISSIONS
tpy Inventory
2017 NEI actual Emissions
Projected 2018 Emissions
D 2017 NEIProjected 2018

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The EPA proposes to conclude that the State has adequately addressed the applicable provisions under 40 CFR
51.308g. The State tracked changes in emissions by category across the entire emission inventory and the results showed that the emissions from SO2, NOX, and PM, the main contributors of regional haze in Louisiana, have all decreased since the 2008 SIP submittal.
The 2011 to 2017 analysis included the most recent five-year period for which data was available. These data indicated that overall emissions of all visibility impairing pollutants reduced. SO2, NOX, and PM emissions have continued to show a downward trend since 2011, which supports that the controls included as part of the 2008 Regional Haze long-term strategy were effective in reducing emissions. The EPA
concludes that the State presented an adequate analysis tracking emission trends for the key visibility impairing pollutants across Louisiana.
F. Assessment of Changes Impeding Visibility Progress The State indicated in the progress report 67 that there were no significant changes in anthropogenic emissions that limited or impeded progress in reducing pollutant emissions and improving visibility at the States one Class I area that were not already contemplated in the 2008 Louisiana Regional Haze SIP
and subsequent revisions. Breton National Wilderness Refuge has shown overall downward trends in visibility impairment as a result of the implemented controls in Louisiana and other states. The States current analysis of emission reductions and categorized inventories presented in the progress report showed that no significant changes in emissions within the state occurred to further impede or adversely affect the visibility improvement at Breton. It was also determined that additional emission reductions from other states were not necessary to address visibility impairment at Breton for the first implementation period. No significant emission changes from sources outside of Louisiana were identified that limited or impeded 67 See
Pages 4142 of the progress report.

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VOC

NOX

260,746
399,975

331,115
535,080

I 139,229 I 203,965 I

PM2.5

PM10

78,455
84,581
6,126

NH3

252,843
99,933

I

152,910

45,959
56,839

I

10,880

SO2
141,930
453,770

CO
788,471
1,367,027

I 311,840 I 578,556

conditions and visibility is continuing to improve.
LDEQ acknowledged in the progress report that sources in Louisiana have the potential to impact one Class I area in Arkansas, Caney Creek Wilderness Area. No specific emissions from Louisiana sources were identified in Arkansas plan that would prevent or G. Assessment of Current Strategy To inhibit reasonable progress at Caney Meet RPGs Creek or any other mandatory federal Class I areas in Arkansas. Emissions In its progress report, the State from Louisiana were below the 2018
assessed the strategies in the Louisiana projected levels relied on for planning Regional Haze SIP and subsequent revisions. The State determined that the by Arkansas for the first planning period. Arkansas stated in its August 8, strategies were sufficient to enable 2018, Regional Haze SIP Revision that Louisiana and other states with Class I
Arkansas is already on track to meet or areas affected by emissions from exceed the established reasonable Louisiana to meet all established RPGs.
progress goals for Caney Creek.71 When Louisianas Regional Haze SIP
comparing the revised 2018 RPG with revisions,68 which EPA finalized the observed five-year visibility trend, approval on December 21, 2017,69
Caney Creek is already realizing more outlined control measures to improve visibility improvement than needed to visibility by reducing anthropogenic emissions of SO2, PM10, PM2.5, and NOX. meet the revised 2018 RPG. The visibility index at Caney Creek during Specific regional haze BART controls and enforceable limits were imposed on the 20122016 period the most current five-year period at the time of the eleven major stationary sources three submittal was 20.64 dv, which is 1.83
non-EGU sources and eight EGU
dv below the 2018 revised RPG of 22.47
sources and resulted in a decrease in dv, and visibility is continuing to the target pollutants. Actual point improve.
source emissions from 20022017 were The EPA proposes to conclude that reduced as follows; SO2 emissions were the State has adequately addressed the reduced by 61% 214,227 tons; NOX
applicable provisions under 40 CFR
emissions were reduced by 55%
51.308g to assess the current strategy 177,384 tons; PM10 emissions were to meet the RPGs. The State has reduced by 34% 10,212 tons; and assessed the implementation plan in PM2.5 emissions were reduced by 23%
place at the time that its progress report 9,458 tons. Currently, Breton National was submitted, and we find that the Wilderness Refuge is achieving greater implementation plan as it currently visibility improvement than its 2018
exists is sufficient to enable the state of 70
RPG. Based on available monitored Louisiana and other nearby states to data, Breton is realizing more visibility meet their RPGs. The realized and improvement than needed to meet its planned controls and reductions that 2018 RPG. The current visibility form the current strategy for the first trendline is 1.8 dv below the respective implementation period are sufficient to 2018 RPG of 22.51 dv from the baseline meet the RPGs as established in the Louisiana Regional Haze SIP including 68 See October 27, 2016, proposed approval 81
all revisions. Breton National FR 74750 for the BART determinations for nonWilderness Refuge in Louisiana is EGU facilities; the May 19, 2017, proposed approval 82 FR 22936 for the BART determinations for EGU currently meeting the 2018 RPG for the facilities, and the July 13, 2017, proposed approval twenty percent worst days and shows progress in reducing pollutant emissions and improving visibility at Breton. EPA proposes to conclude that the State has adequately addressed the applicable provisions under 40 CFR
51.308g regarding assessing any changes that could impede visibility progress.

82 FR 32294 for BART determination for Nelson Unit 6.
69 See December 21, 2017, final approval 82 FR
60520 of these SIP revisions which became effective on January 22, 2018.
70 See Table 15 of the progress report page 31.

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71 See Figure 17: Caney Creek Reasonable Progress Goals page 42 of the progress report. See spreadsheet, visibility-progress.xlsx, provided at https www.adeq.state.ar.us/air/planning/sip/
regional-haze.aspx.

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