R 336.1844

R 336.1844 RACT emission limitations for miscellaneous process specific combustion sources.

Last amended: 2025Year: 2026Length: 1,452 wordsOfficial source

Cite as Mich. Admin. Code R 336.1844

Rule 844. (1) As used in this rule: (a) “Combustion device” means an individual unit of equipment used for combustion of a fuel using a controlled flame. (b) “Process heater” means an enclosed combustion device, or collection of combustion devices, in which the emission unit’s primary purpose is to transfer heat to a process material, gas, liquid, or solid, or heat transfer material for use in a process other than to generate steam. Process heaters do not include emission units that are used for comfort, water or space heat, food preparation for on-site consumption, autoclaves, waste heat process heaters, or devices whose primary function is to control air pollution. (2) A person is subject to this rule and shall not cause or allow the emission of NOx from the combustion of fuels in asphalt plants, process heaters, engine test cells and stands, lime kilns, or glass manufacturing units in excess of the allowable emissions, including the limitations of this rule at facilities meeting either of the following criteria: (a) Located in the 2015 ozone nonattainment areas and either of the following: (i) A stationary source with a potential to emit 100 tons per year or greater of NOx from all combined NOx sources on the effective date of this rule. (ii) An emission unit installed after the effective date of this rule. (b) Has been subject to the requirements of this rule. The requirements in this rule, at a minimum, must permanently apply regardless of a change in the attainment or maintenance status of the stationary source location or the potential to emit of the stationary source. (3) If an exemption is utilized, all applicable requirements of R 336.1846 must be met. If the emission unit is not utilizing an exemption listed below, all provisions of this rule apply. Emission units may utilize the following exemptions from all provisions of this rule except subrule (7)(d) of this rule: (a) Asphalt plants equal to or less than 50 MMBtu/hr. (b) Process heaters equal to or less than 60 MMBtu/hr that do not inject ammonia or use refinery fuel gas. (c) Process heaters equal to or less than 10 MMBtu/hr that inject ammonia. (d) All combustion devices under 20 MMBtu/hr in a process heater that do not exceed a total of 100 MMBtu/hr when combined. (e) Lime kilns equal to or less than 50 MMBtu/hr. (f) Glass manufacturing furnaces equal to or less than 50 MMBtu/hr. (g) A research or development emission unit meeting the requirements of R 336.1283. (h) Engine test cells and stands that are testing engines rated 1200 HP or less. (i) Air pollution control devices. (4) Except as allowed by R 336.1845, or as required by subrule (8) of this rule, a person that generates NOx emissions from the use of hot mix asphalt plants, process heaters, engine test cells and stands, lime kilns, or glass manufacturing shall meet the following limits within table 844, as applicable, by the effective date of the rule. TABLE 844 NOx emission limits from miscellaneous combustion sources Process NOx Emission limit on an hourly basis a Hot Mix Asphalt Plants > 50 MMBtu/hr Gaseous fuels 0.15 lb/MMBtu Distillate oil 0.20 lb/mmBtu Residual Oil 0.27 lb/mmBtu Process Heaters Gaseous fuels >60 MMBtu/hr 0.12 lb/MMBtu Distillate Oil >60, =< 100 MMBtu/hr 0.12 lb/MMBtu Distillate Oil > 100 MMBtu/hr 0.14 lb/MMBtu Residual Oil >60, =< 100 MMBtu/hr 0.15 lb/MMBtu Residual Oil > 100 MMBtu/hr 0.18 lb/MMBtu Refinery Fuel Gas 0.18 lb/MMBtu Any fuel > 10 MMBtu/hr utilizing ammonia injection 0.20 lb/MMBtu Engine Test Cells/Stands Gaseous Fuel engines > 1200 HP 0.08 lb/MMBtu Distillate Oil engines > 1200 HP 0.10 lb/MMBtu Lime Kilns > 50 MMBtu/hr 6.0 lb/ton of lime produced Glass Manufacturing > 50 MMBtu/hr 3.5 lb/ton of glass produced a Except for alternative averaging periods as allowed in (6)(c)(ii) of this rule. (5) A process heater installed after the effective date of the rule must utilize a low-NOx burner, equivalent technology, or better. (6) A person subject to this rule shall demonstrate compliance by implementing and maintaining the following: (a) Create and implement an approvable maintenance plan for the affected emission unit. (b) To the extent practicable, maintain and operate the affected emission unit in a manner consistent with good air pollution control practice for minimizing emissions at all times, including during startup, shutdown, and malfunction. The department shall determine compliance with this requirement based on information that may include, but is not limited to, monitoring results, review of operation and maintenance procedures, and review of operation and maintenance records. (c) For emission units with an emission rate limit specified in subrule (4) of this rule, 1 of the following: (i) If a performance test has not been done within the last 18 months before the effective date of this rule, the person subject to this rule shall conduct an initial performance test, acceptable to the department, within 180 days after the effective date of this rule to demonstrate compliance with the required emission rate limit, or within 30 days after startup if the unit is not operating. A performance test must then be completed every 24 months, after the date of the last test, consistent with the requirements of R 336.2004. The 24-month frequency may be increased to once every 5 years when the most recent test results are 75% of the limit and the source certifies no other tests or information indicates a value over 75% of the limit. (ii) An approvable plan must be submitted to the department describing how the NOx emissions will be monitored. The monitoring plan must include how the performance of periodic monitoring is sufficient to yield reliable data from relevant time periods representative of the source’s compliance with the emission rates specified in subrule (4) of this rule. Periodic monitoring may include the following: (A) A parametric monitoring program that specifies operating parameters, and their ranges, that will provide reasonable assurance each emission unit’s emissions are consistent with the requirements of this rule. (B) A predictive emissions measurement system that relies on automated data collection from instruments. If an affected emission unit is equipped with a predictive emission monitoring system, compliance with the applicable emissions limit is determined based on the 30-day rolling average of the hourly arithmetic average emissions rates. (C) A continuous emission monitoring system that complies with 40 CFR part 60 or 40 CFR part 75, both adopted by reference in R 336.1902. If an affected emission unit is equipped with a continuous emission monitoring system, compliance with the applicable emissions limit shall be determined based on the 30-day rolling average of the hourly arithmetic average emissions rates. (7) A person operating an emission unit subject to this rule shall obtain current information and maintain records for all requirements and exemptions in sufficient detail to determine compliance. When requested by the department, the following information and records must be made available: (a) Installation dates of the affected emission unit. (b) The maintenance plan. (c) All associated maintenance records for a minimum of 5 years. (d) Either the results of the most recent stack test, or a minimum of 5 years of all monitoring data necessary to demonstrate compliance with limits and requirements in subrule (4) of this rule, or both as applicable. (e) If the provisions of this rule are not applicable as allowed by subrule (3), all information necessary to demonstrate that the equipment meets the exemption being utilized. (8) If records are not requested by the department for any 3-year rolling period, the facility will submit a report to the department with information and records in sufficient detail to determine compliance with the limits in this rule. (9) A person that generates NOx emissions from the use of a process heater located in the 2015 ozone nonattainment area shall meet the following limits within table 844a 12 months after the effective date of a final determination by the USEPA, pursuant to section 182(c)(9) of the clean air act 42 USC 7511a, for either of the following elements of the 2015 ozone National Ambient Air Quality Standard: (a) The USEPA makes a determination that reasonable further progress as described in Michigan’s approved state implementation plan was not achieved. (b) The USEPA makes a determination that the area failed to attain the standard by the applicable attainment date. TABLE 844a NOx emission limits from process heaters Process NOx Emission limit on an hourly basis Process Heaters Gaseous fuels >60 MMBtu/hr 0.10 lb/MMBtu Distillate Oil >60, =< 100 MMBtu/hr 0.10 lb/MMBtu Distillate Oil > 100 MMBtu/hr 0.12 lb/MMBtu Residual Oil >60, =< 100 MMBtu/hr 0.14 lb/MMBtu Residual Oil > 100 MMBtu/hr 0.15 lb/MMBtu a Except for alternative averaging periods as allowed in (6)(c)(ii) of this rule.
R 336.1844: R 336.1844 RACT emission limitations for miscellaneous process specific combustion sources. | Justis AI