Sec. 26.11.08.10. NO x Requirements for Large Municipal Waste Combustors

A. The owner and operator of a Large MWC shall minimize NO_x emissions by operating and optimizing the use of all installed pollution control technology and combustion controls consistent with the technological limitations, manufacturers’ specifications, good engineering and maintenance practices, and good air pollution control practices for minimizing emissions (as defined in 40 CFR §60.11(d)) for such equipment and the unit at all times the unit is in operation, including periods of startup, shutdown, and warm-up.

B. As of May 1, 2019, the owner or operator of a Large MWC shall meet the following applicable NO_x emission rates, except for periods of startup, shutdown, and warm-up:

Affected Sources	NOx 24-hour block average emission rate
Montgomery County Resource Recovery Facility	140 ppmv
Wheelabrator Baltimore Inc.	150 ppmv

C. As of May 1, 2020, the owner or operator of a Large MWC shall meet the requirements of §B of this regulation and the following applicable NO_x emission rates, except for periods of startup, shutdown, and warm-up:

Affected Sources	NOx 30-day rolling average emission rate
Montgomery County Resource Recovery Facility	105 ppmv
Wheelabrator Baltimore Inc.	145 ppmv

D. Startup, Shutdown, and Warm-Up NO_x Emission Limitations.

(1) As of May 1, 2019, a facility-wide NO_x emission limit of 202 lbs/hr timed average mass loading over a 24-hour period shall apply during periods of startup and shutdown for the Montgomery County Resource Recovery Facility.

(2) As of May 1, 2019, a facility-wide NO_x emission limit of 252 lbs/hr timed average mass loading over a 24-hour period shall apply during periods of startup and shutdown for Wheelabrator Baltimore Inc.

(3) As of May 1, 2019, on days when the unit is in startup, the NO_x 24-hour block average emission rate under §B of this regulation will apply for the 24-hour period after startup is completed.

(4) As of May 1, 2019, on days when the unit is in shutdown, the NO_x 24-hour block average emission rate under §B of this regulation will apply for the 24-hour period prior to the commencement of shutdown.

(5) As of January 1, 2020, a facility-wide NO_x emission limit of 202 lbs/hr timed average mass loading over the warm-up period shall apply for the Montgomery County Resource Recovery Facility.

(6) As of January 1, 2020, a unit-specific NO_x emission limit of 84 lbs/hr timed average mass loading over the warm-up period shall apply for Wheelabrator Baltimore Inc.

E. Additional NO_x Emission Control Requirements.

(1) Not later than January 1, 2020, the owner or operator of Wheelabrator Baltimore Inc. shall submit a feasibility analysis for additional control of NO_x emissions from the Wheelabrator Baltimore Inc. facility to the Department. This analysis shall be prepared by an independent third party and include the following:

(a) A written narrative and schematics detailing existing facility operations, boiler design, NO_x control technologies, and relevant emission performance;

(b) A written narrative and schematics detailing various state-of-the-art NO_x control technologies for achieving additional NO_x emission reductions from existing MWCs, including technologies capable of achieving NO_x emission levels comparable to those for a new source in consideration of the overall facility design at Wheelabrator Baltimore Inc.;

(c) An analysis of whether each state-of-the-art control technology identified under §E(1)(b) of this regulation could technically be implemented at the Wheelabrator Baltimore Inc. facility;

(d) Capital and operating costs, NO_x emission benefits, and air quality impacts resulting from installation of each state-of-the-art control technology as identified under §E(1)(b) of this regulation; and

(e) An estimated timeline for installation of each state-of-the-art control technology as identified under §E(1)(b) of this regulation which shall include design time, construction, operational testing, and start up.

(2) Upon written request, Wheelabrator Baltimore Inc. shall submit any other information that the Department determines is necessary to evaluate the feasibility analysis.

(3) Not later than January 1, 2020, based upon the results of the feasibility analysis as required under §E(1) of this regulation, the owner or operator of Wheelabrator Baltimore Inc. shall propose and submit a NO_x 24-hour block average emission rate, NO_x 30-day rolling average emission rate, and NO_x mass loading emission limitation for periods of startup, shutdown, malfunction, and warm-up.

F. The owner or operator of a Large MWC shall continuously monitor NO_x emissions with a continuous emission monitoring system in accordance with COMAR 26.11.01.11.

G. Not later than 45 days after the effective date of this regulation, the owner or operator of a Large MWC shall submit a plan to the Department and EPA for approval that demonstrates how the Large MWC will operate installed pollution control technology and combustion controls to meet the requirements of §A of this regulation. The plan shall summarize the data that will be collected to demonstrate compliance with §A of this regulation. The plan shall cover all modes of operation, including but not limited to normal operations, startup, shutdown, and warm-up.

H. Beginning July 1, 2019, the owner or operator of a Large MWC shall submit a quarterly report to the Department containing:

(1) Data, information, and calculations which demonstrate compliance with the NO_x 24-hour block average emission rate as required in §B of this regulation;

(2) Data, information, and calculations, including NO_x continuous emission monitoring data and stack flow data, which demonstrate compliance with the startup, shutdown, and warm-up mass NO_x emission limits as required in §D of this regulation;

(3) Flagging of periods of startup, shutdown, and warm-up and exceedances of emission rates;

(4) NO_x continuous emission monitoring data and total urea flow rate to the boiler averaged over a 1-hour period, in a Microsoft Excel format; and

(5) Documented actions taken during periods of startup, shutdown, and warm-up in signed, contemporaneous operating logs.

I. Beginning July 1, 2020, the quarterly report to be submitted pursuant to §H of this regulation shall also include data, information, and calculations which demonstrate compliance with the NO_x 30-day rolling average emission rate as required in §C of this regulation.

J. No less than 2 weeks advance notice and the opportunity to observe activities shall be provided to the Department prior to any optimization procedure, including installation or operation of NO_x emission control technology, for the express purpose of complying with the requirements of §E(1) of this regulation.

K. Compliance with the NO_x emission standards in §§B, C, and D of this regulation shall be demonstrated with a continuous emission monitoring system.

L. Compliance with the NO_x Mass Loading Emission Limitation for the Montgomery County Resource Recovery Facility.

(1) Compliance with the NO_x mass loading emission limitation for periods of startup and shutdown in §D(1) of this regulation shall be demonstrated by calculating the 24-hour average of all hourly average NO_x emission concentrations from continuous emission monitoring systems.

(2) The calculations in §L(1) of this regulation shall utilize stack flow rates derived from flow monitors, for all the hours during the 3-hour startup or shutdown period and the remaining 21 hours of the 24-hour period.

(3) Compliance with the NO_x mass loading emission limitations for warm-up periods in §D(5) of this regulation shall be demonstrated by calculating the average of all hourly average NO_x emission concentrations during the warm-up period from continuous emission monitoring systems.

(4) The calculations in §L(3) of this regulation shall utilize stack flow rates derived from flow monitors, for all the hours during the warm-up period.

M. Compliance with the NO_x Mass Loading Emission Limitation for the Wheelabrator Baltimore Inc.

(1) Compliance with the NO_x mass loading emission limitation for periods of startup and shutdown in §D(2) of this regulation shall be demonstrated by calculating the 24-hour average of all hourly average NO_x emission concentrations from continuous emission monitoring systems.

(2) The calculations in §M(1) of this regulation shall utilize the applicable Prevention of Significant Deterioration calculation methodology, for all the hours during the 3-hour startup or shutdown period and the remaining 21 hours of the 24-hour period.

(3) Compliance with the NO_x mass loading emission limitations for warm-up periods in §D(6) of this regulation shall be demonstrated by calculating the average of all hourly average NO_x emission concentrations during the warm-up period from continuous emission monitoring systems.

(4) The calculations in §M(3) of this regulation shall utilize the applicable Prevention of Significant Deterioration calculation methodology, for all the hours during the warm-up period.