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PA Bulletin, Doc. No. 24-130



Interstate Pollution Transport Reduction: Proposed 2024 Ozone Season Nitrogen Oxide Emission Limits for Nonelectric Generating Units

[54 Pa.B. 552]
[Saturday, February 3, 2024]

 The Department of Environmental Protection (Department) is providing notice and an opportunity for public comment on the proposed Nonelectric Generating Unit (non-EGU) 2024 Ozone Season (OS) Nitrogen Oxide (NOx) emission limitations established under 25 Pa. Code § 145.8(d) (relating to transition to CAIR NOx trading programs). The 17-day public comment period will end on February 19, 2024.

 Specifically, 25 Pa. Code § 145.8(d) establishes a non-EGU NOx Trading Program budget of 3,619 tons of NOx, less a specified adjustment amount, to serve as a Statewide OS NOx emissions cap for new and existing non-EGUs. This NOx emissions cap also applies to Clean Air Interstate Rule (CAIR) exempt EGUs that are subject to the NOx Budget Trading Program. If the total emissions from all the units exceed the Statewide NOx emissions cap of 3,438 tons, the owners and operators of non-EGUs must comply with the NOx emission limitations established under 25 Pa. Code § 145.8(d). The proposed NOx emissions limitations for individual units ensure that non-EGUs in this Commonwealth continue to meet the emission limits of the NOx Budget Trading Program. The difference between the calculated total OS NOx limit for all units in the following Table 1 and the total NOx limit of 3,438 tons is due to rounding when calculating the NOx limit for each individual unit.

 The Statewide cap for 2023 was not exceeded. Therefore, the owners and operators of non-EGUs do not need to purchase allowances to meet their 2023 OS NOx emission limitations established under 25 Pa. Code § 145.8(d). The NOx emissions for the 2023 OS (May through September) reported to the United States Environmental Protection Agency (EPA) by the owners and operators of the affected non-EGUs are 656.5 tons. The Department's permanent retirement of 3,438 NOx allowances under 25 Pa. Code § 145.8(b) covers all the NOx emissions from the affected non-EGUs in 2023.

 In addition to the 3,438-ton non-EGU cap previously described, 25 Pa. Code § 145.8(d)(12) provides 181 tons of NOx emissions annually for non-EGUs and the other units that need to address their limits or emissions through accounting adjustments, including units that previously participated in the NOx Budget Trading Program. The Department may use a portion of the 181 tons of the budgeted NOx emissions, if necessary, to address rounding issues, mistakes or miscalculations. This year, the Department is proposing to use 2 of the 181 tons of NOx emissions set aside from the non-EGU NOx Trading Program budget for accounting adjustments. The accounting adjustment is needed due to the rounding errors in calculating individual unit limits to meet the 3,438-ton non-EGU NOx cap. Rounding resulted in an allocation limit totaling 3,436 tons of NOx.

 The Vicinity Energy Philadelphia Facility's Schuylkill Unit 24 listed in the non-EGU limits table during previous years was removed from the following Table 1. The EPA's Clean Air Markets Division Business System reports Unit 24's operating status as retired on November 14, 2016. Once a unit is confirmed to no longer be operating, it cannot be allocated a limit.

 The following ''Proposed Non-EGU 2024 OS NOx Emission Limits'' in Table 1 lists the following: 'facility name,' 'ORIS code,' 'unit ID' for each non-EGU unit, '2023 NOx mass' or the 2023 OS emissions, '2023 heat input' for the 2023 OS, the 'county' location of the facility, the calculated '2024 rate,' and the '2024 OS limit.'

 Interested persons may submit written comments on the proposed non-EGU 2024 OS NOx Emission Limits through February 19, 2024. Comments, including comments submitted by e-mail, must include the commentator's name and address. Commentators are encouraged to submit comments using the Department's online eComment tool at or by e-mail to Written comments can be mailed to the Policy Office, Department of Environmental Protection, Rachel Carson State Office Building, P.O. Box 2063, Harrisburg, PA 17105-2063. Use ''Proposed non-EGU 2024 Ozone Season NOx emission limits'' as the subject line in written communication.

 Questions concerning this notice should be directed to Randy Bordner at (717) 772-3921 or TDD users may contact the Pennsylvania Hamilton Relay Service at (800) 654-5984 to discuss how the Department can best accommodate their needs.

Table 1: Final Non-EGU 2024 OS NOx Emission Limits

Facility NameORIS
Unit ID2023
County2024 Rate
(tons NOx)
 AdvanSix Resins & Chemicals, LLC  880007 5225.826719,010Philadelphia0.36129
Armagh Compressor Station880071 31301 00 Indiana0.360
Bernville Station8800493200100Berks0.360
Domtar Paper Company, LLC54638405.866192,474.5Elk0.3635
Domtar Paper Company, LLC546384114.698574,534.3Elk0.36103
Entriken Compressor Station8800723160100Huntingdon0.360
ETMT—Marcus Hook Terminal880107AB012.919172,772.8Delaware0.3631
ETMT—Marcus Hook Terminal880107AB031.961122,611.4Delaware0.3622
ETMT—Marcus Hook Terminal880107AB047.146594,574.1Delaware 0.36107
Merck & Company—West
Merck & Company—West
Pixelle Specialty Solutions5039736209.5771,690,202York0.36304
Pixelle Specialty Solutions50397386.997511,015.7York0.3692
Pixelle Specialty Solutions50397395.711413,152.8York0.3674
Procter & Gamble Paper Products50463328001122.3191,914,955Wyoming0.36345
Procter & Gamble Paper Products504633280026.2781,796,525Wyoming0.36323
Sherman's Dale Station8800503180100Perry0.360
Trainer Refinery880025341.282573,301.1Delaware0.36103
Trainer Refinery880025351.323560,951Delaware0.36101
Trainer Refinery880025531.022654,339.4Delaware0.36118
US Steel (Clairton Coke)50729CLBLR196.361,190,432Warren0.36214
US Steel (Clairton Coke)50729CLBLR272.46968,787.8Allegheny0.36174
US Steel (Edgar Thomson)50732ETBLR110.7941,416,966Allegheny0.36255
US Steel (Edgar Thomson)50732ETBLR214.9131,603,503Allegheny0.36289
US Steel (Edgar Thomson)50732ETBLR312.9911,582,020Allegheny0.36285
Vicinity Energy
Edison Station
Vicinity Energy
Edison Station
Vicinity Energy
Edison Station
Vicinity Energy
Edison Station
Vicinity Energy

Vicinity Energy

Vicinity Energy

Vicinity Energy


Interim Acting Secretary

[Pa.B. Doc. No. 24-130. Filed for public inspection February 2, 2024, 9:00 a.m.]

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