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Federal Register / Vol. 86, No. 137 / Wednesday, July 21, 2021 / Proposed Rules
than April 1, 2025. Louisiana Generating is required to notify EPA of which option it will select to comply with this condition no later than December 31, 2022. LDEQs modeling demonstrated that, based on these existing controls and enforceable emission limits, Big Cajun II contributes less than 0.5 dv at impacted Class I
areas, and therefore the facility is not subject to BART. NRG Big Cajun II and LDEQ agreed to make the consent decree limits enforceable for regional haze SIP purposes, and entered into an AOC unnumbered to mirror the SO2, NOX, PM10, and PM2.5 limits imposed by the consent decree with a compliance deadline of February 9, 2017. The EPA
final approval date was December 21, 2017 82 FR 60520.

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b. ClecoBrame Energy Center The Cleco Brame Energy Center addressed SO2 and PM10 BART controls for two subject-to-BART EGU boilers, Nesbitt 1 and Rodemacher 2 units. The Nesbitt 1 boiler was permitted to burn natural gas or oil and did not have any air pollution controls installed. Cleco committed to burn only natural gas until a five-factor BART analysis for the fueloil-firing scenario was submitted to LDEQ and included in an EPA approved SIP revision. To make the prohibition on fuel-oil usage at this unit enforceable, Cleco and LDEQ entered an AOC unnumbered that established enforceable SO2 and PM10 limits, consistent with the exclusive use of natural gas for the Nesbitt 1 boiler. The Rodemacher 2 boiler has an enhanced DSI system for SO2 control. The Rodemacher 2 boiler also has an electrostatic precipitator ESP and a fabric filter baghouse downstream of the DSI system for PM control. These controls offer the necessary controls for SO2 and PM10 BART for the Rodemacher 2 boiler. Therefore, emission limits were established consistent with these controls and included in the AOC to make the limits enforceable for regional haze purposes.
The AOC also allowed the Rodemacher 2 boiler to meet the SO2 and PM10
emissions limits by conversion to natural gas only, unit retirement, or another means of achieving compliance with the emission limits. The compliance deadline of the AOC was February 9, 2017.44 The EPA final approval date was December 21, 2017
82 FR 60520.

c. EntergyWillow Glen Entergy addressed SO2 and PM10
BART controls for multiple EGU boiler units subject-to-BART Units 2, 3, 4, 5, and the Auxiliary Boiler at the Willow Glen facility. Each was permitted to burn fuel oil, but Entergy agreed to an AOC unnumbered signed February 9, 2017, to require a five-factor BART
analysis for the fuel-oil firing scenario to be submitted to LDEQ and included in an EPA approved SIP revision before fuel-oil combustion would occur at the Willow Glen facility. No additional controls for the Willow Glen units would be required when burning natural gas. EPA approved LDEQs determination that SO2 and PM10 BART
for Willow Glen was addressed by this operational scenario.45 However, as of May 31, 2016, Willow Glen was decommissioned, and the Title V
operating permit was rescinded on June 6, 2018. Emissions have ceased since 2016, so the facility remains in compliance with the AOC which had a compliance deadline of February 9, 2017. The EPA final approval date was December 21, 2017 82 FR 60520.
d. EntergyLittle Gypsy Entergy addressed SO2 and PM10
BART controls for three subject-toBART EGU boiler units at its Little Gypsy facility Units 2, 3, and the Auxiliary Boiler. The Unit 2 boiler was permitted to burn natural gas as its primary fuel, and No. 2 and No. 4 fuel oil as secondary fuels. The Unit 3 boiler burns natural gas but was also permitted to burn fuel oil. The auxiliary boiler for Unit 3 is permitted to burn only natural gas. While no additional controls were determined to be necessary when burning natural gas, Entergy agreed to switch to ultra-low sulfur diesel ULSD
fuel oil. In order to make the use of ULSD enforceable for regional haze purposes, LDEQ and Entergy entered into an AOC with a compliance deadline of February 13, 2017, limiting fuel oil to ULSD. The EPA final approval date was December 21, 2017
82 FR 60520.
e. EntergyNinemile Point Entergy addressed SO2 and PM10
BART controls for two subject-to-BART
EGU boiler units at its Ninemile Point facility Units 4 and 5. The Unit 4
boiler burned primarily natural gas and No. 2 and No. 4 fuel oil. The Unit 5
boiler burned primarily natural gas and No. 2 and No. 4 fuel oil. While no additional controls were determined to be necessary when burning natural gas, Entergy agreed to switch to ULSD fuel
44 See Table 6: Brame Summary of AOC
Conditions page 17 of the States Progress Report.

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oil. In order to make the use of ULSD
enforceable for regional haze purposes, LDEQ and Entergy entered into an AOC
unnumbered with a compliance deadline of February 9, 2017, limiting fuel oil to ULSD with a sulfur content of 0.0015%. The EPA final approval date was December 21, 2017 82 FR
60520.
f. EntergyWaterford 1 and 2
Entergy addressed SO2 and PM10
BART controls for three subject-toBART EGU boiler units at its Waterford 1 & 2 Generating Plant facility Units 1
and 2 and the auxiliary boiler. The Unit 1 boiler is an EGU boiler that burned primarily natural gas and No. 6 fuel oil as its secondary fuel. The Unit 2 boiler is an EGU boiler that burned primarily natural gas and No. 6 fuel oil as its secondary fuel. The auxiliary boiler burns only natural gas. While no additional controls were determined to be necessary when burning natural gas, Entergy agreed to switch to fuel oil with a lower sulfur content. In order to make the lower sulfur content fuel enforceable for regional haze purposes, LDEQ and Entergy entered into an AOC with a compliance deadline of February 9, 2017, limiting fuel oil to a sulfur content of 1% or less. The EPA final approval date was December 21, 2017 82 FR
60520.
g. EntergyMichoud Entergy addressed SO2, NOX, and PM
BART controls for two subject-to-BART
EGU boiler units at its Michoud Generating Plant Units 2 and 3. In a letter dated August 10, 2016, Entergy elected to permanently retire Units 2
and 3 effective June 1, 2016.
Subsequently, the Title V Operating Permit was modified to remove these units effective January 31, 2019. All SO2, PM, and NOX emissions from Units 2 and 3 at Michoud have ceased after 2016 and the boilers are no longer in operation. The EPA final approval date was December 21, 2017 82 FR 60520.
h. EntergyNelson Entergy addressed SO2 and PM10
BART controls for three subject-toBART boiler units at its Roy S. Nelson steam electric power generating facility Unit 4 and 6 Boilers, and Unit 4
Auxiliary Boiler. The required SO2 and PM10 BART controls preclude fuel-oil combustion at Unit 4 and the Unit 4
Auxiliary boiler. To make the prohibition on fuel-oil usage enforceable for regional haze purposes, Entergy and LDEQ entered into an AOC
unnumbered that established that before fuel-oil firing is allowed to take place at Unit 4 and the auxiliary boiler,
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