North Carolina Administrative Code › Title 15A - Environmental Quality › Chapter 02 - Environmental Management › Subchapter D - AIR POLLUTION CONTROL REQUIREMENTS › Section .1400 - NITROGEN OXIDES › Section 02D .1424 - LARGE NON-ELECTRIC GENERATING UNITS

Current through Register Vol. 39, No. 2, July 15, 2024
(a)
				  General requirements. The owner or operator of a large non-EGU shall comply
				  with the monitoring, recordkeeping and reporting requirements in
				  15A NCAC
				  02D .0600, with the exception of .0604 and
				  .0612. For a period of five years, the owner or operator shall maintain all
				  records necessary for determining compliance with all applicable limitations
				  and standards of this Section.
(b)
				  The owner or operator of a large non-EGU covered by this Rule may request
				  alternative monitoring procedures if the source is not required by
				  15A NCAC
				  02D .1418 or any other federal regulation to
				  comply with 40 CFR Part 75.
(c) For
				  a source subject to 40 CFR Part 60 Subpart D or Subpart Db, the source shall
				  determine NOx mass emissions using the NOx emission rate, total heat input
				  derived, and time interval from each type of fuel during the NOx SIP Call
				  control period.
(d) For a large
				  non-EGU requesting an alternative monitoring procedure, one of the following
				  monitoring options shall be used to determine NOx emissions.
(1) For sources with at least five years of
				  historical CEMS operational data, the NOx mass emissions shall be determined
				  using the following formula:
M = K*C*Q*t/2000
where;
M is the NOx mass emissions in tons;
K is the conversion constant equal to 1.194E-7 pounds per
					 standard cubic feet-parts per million volume (lb/scf-ppmv);
C is the average NOx concentration of the unit as
					 demonstrated by previous 40 CFR Part 75 monitoring in parts per million volume
					 (ppmv);
Q is the average flow rate of the unit under normal
					 operating conditions as demonstrated by previous 40 CFR Part 75 monitoring in
					 standard cubic feet per hour (scf/hr);
t is the total operating time in hours during the ozone
					 season; and
2000 pounds per ton (2000 lb/ton).
(2) For sources with at least five years of
				  historical CEMS emissions data, the NOx mass emissions shall be determined as
				  follows:
M = R*HI*t/2000
where;
M is the NOx mass emissions in tons,
R is the average NOx mass emission rate in pounds per
					 million Btu (lb/MMBtu),
HI is the average heat input rate per hour in million
					 British thermal units per hour (MMBtu/hr),
t is the operating time in hours during ozone season,
					 and
2000 pounds per ton (2000 lb/ton).
(3) For sources without historical CEMS
				  operational data or the CEMS data do not represent current operating
				  conditions, the large non-EGU source shall test utilizing 40 CFR Part 60,
				  Appendix A, Methods 1-4 and 7 or 7e to determine initial NOx concentration and
				  flow rate factors prior to the ozone season.
(A) The NOx concentration and flow rate
				  factors determined from the testing and the number of hours operated during the
				  ozone season will be used to determine NOx emissions for that ozone
				  season.
(B) After a total of three
				  years of testing, the source shall use the average NOx concentration and flow
				  rate factors for subsequent ozone season NOx emissions reporting.
(C) Sources shall use the equation in
				  Subparagraph (1) of this Paragraph to calculate their NOx mass emissions in
				  tons.