Pennsylvania Code › Title 25 - ENVIRONMENTAL PROTECTION › Part I - Department of Environmental Protection › Subpart C - Protection of Natural Resources › Article III - Air Resources › Chapter 123 - STANDARDS FOR CONTAMINANTS › SULFUR COMPOUND EMISSIONS › Section 123.22 - Combustion units

Current through Register Vol. 54, No. 28, July 13, 2024
(a)
Nonair basin areas
. Combustion units in nonair basin areas
						must conform with the following:
(1)
General provision
. A person may not permit the emission into
						the outdoor atmosphere of sulfur oxides, expressed as
						SO2, from a combustion unit in excess of the rate of 4
						pounds per million Btu of heat input over a 1-hour period, except as provided
						in paragraph (4).
(2)
Commercial fuel oil.
(i)
						Except as specified in subparagraphs (ii) and (iii), a person may not offer for
						sale, deliver for use, exchange in trade or permit the use of commercial fuel
						oil in nonair basin areas if the commercial fuel oil contains sulfur in excess
						of the applicable maximum allowable sulfur content set forth in the following
						table:
Maximum Allowable Sulfur Content Expressed as
						  Parts per Million (ppm) by Weight or Percentage by Weight
Grades Commercial Fuel Oil (Consistent
								  with ASTM D396)
Through August 31, 2020
Beginning September 1, 2020
No. 2 and lighter oil
500 ppm (0.05%)
15 ppm (0.0015%)
No. 4 oil
2,500 ppm (0.25%)
2,500 ppm (0.25%)
No. 5, No. 6 and heavier oil
5,000 ppm (0.5%)
5,000 ppm (0.5%)
(ii) Commercial fuel oil that was stored in
						this Commonwealth by the ultimate consumer prior to September 1, 2020, which
						met the applicable maximum allowable sulfur content for commercial fuel oil
						through August 31, 2020, in subparagraph (i) at the time it was stored, may be
						used by the ultimate consumer in this Commonwealth on and after September 1,
						2020.
(iii) The Department may
						temporarily suspend or increase the applicable maximum allowable sulfur content
						for a commercial fuel oil set forth in subparagraph (i) if the following occur:
(A) The Department receives a written request
						at the address specified in subsection (h) for a suspension or increase on the
						basis that compliant commercial fuel oil is not reasonably available in a
						nonair basin area. The request must include the following:
(I) The nonair basin county or counties for
						which the suspension or increase is requested.
(II) The reason compliant commercial fuel oil
						is not reasonably available.
(III)
						The duration of time for which the suspension or increase is requested and the
						justification for the requested duration.
(B) The Department determines that an
						insufficient quantity of compliant commercial fuel oil is reasonably available
						in the nonair basin area and that the circumstances leading to the
						insufficiency are due to events that could not have been reasonably foreseen or
						prevented and are not due to lack of prudent planning on the part of the
						transferor of the commercial fuel oil into or within the specified nonair basin
						area.
(C) The Department approves
						the request, in writing, prior to the transferor distributing the noncompliant
						commercial fuel oil into or within the specified nonair basin area.
(iv) The Department will limit a
						suspension or increase in the applicable maximum allowable sulfur content
						granted under subparagraph (iii) to the shortest duration in which adequate
						supplies of compliant commercial fuel oil can be made reasonably available, but
						in no case longer than 60 days from the date the Department grants the
						suspension or increase.
(3)
Equivalency provision.
Paragraph (2) does not apply to a person who uses equipment or a process, or to
						the owner or operator of an installation where equipment or a process is used,
						to reduce the sulfur emissions from the burning of a fuel with a higher sulfur
						content than that specified in paragraph (2). The emissions may not exceed
						those which would result from the use of commercial fuel oil that meets the
						applicable maximum allowable sulfur content specified in paragraph
						(2).
(4)
Solid fossil fuel
						fired combustion units.
Solid fossil fuel fired combustion units shall
						conform with the following:
(i) This paragraph
						applies to solid fossil fuel fired combustion units with a rated capacity
						greater than or equal to 250 million Btus of heat input per hour.
(ii) The owner of a solid fossil fuel fired
						combustion unit with a rated capacity of less than 250 million Btu heat input
						per hour may petition the Department for application of the limitations in this
						paragraph in lieu of the limitations in paragraph (1). Upon demonstration of
						installation of continuous monitoring equipment which complies with Chapter 139
						(relating to sampling and testing) the Department will grant the
						petition.
(iii) No person subject
						to this paragraph may permit the emission into the outdoor atmosphere of sulfur
						oxides, expressed as SO2 from a combustion unit in
						excess of the rates set forth in the following table:
Allowable Pounds
								  SO2 per 106 Btu Heat
								  Input
Thirty-day running average not to be exceeded at
								  any time
3.7
Daily average not to be exceeded more than 2 days
								  in any running 30-day period
4.0
Daily average maximum not to be exceeded at any
								  time
4.8
(iv) A combustion unit which does not meet
						the requirements of §
														123.25 (relating to monitoring
						requirements) for installation and operation of continuous
						SO2 emission monitoring equipment shall be subject to
						the provisions of paragraph (1).