2010-81 Adopted effective I0-31-10 CHAPTER Env-A 1300 NITROGEN OXIDES (NOx) REASONABLY AVAILABLE CONTROL TECHNOLOGY (RACT) Statutory Authority: RSA 125-C:4 PART Env-A 1301 PURPOSE AND APPLICABILITY Env-A 1301.01 Purpose. The purpose of this chapter is to establish reasonably available control technology (RACT) standards for certain NOx

-emitting sources located in New Hampshire, to comply with secti ons 172(c)(I) and 182(b)(2) ofthe Act. Env-A 1301.02 Applicability. (a) The requirements in Env-A 1300, as effective on October 31, 2010, shall not relieve any source that was subject to any version ofEnv-A 1211 in effect from May 20, 1994 through October 30, 2010 from its obligation to have been in compliance with applicable rules then in effect. (b) Utility boiler(s) shaH be subject to the requirements ofEnv-A 1303 if the combined maximum heat input rate of such boiler(s) exceeds 50 million Btu per hour at any time after December 31, 1989 and the permitting applicability levels specified in Env-A 607.01 are met. (c) Steam electric boiler(s) shall be subject to the requirements ofEnv-A 1304 if the combined maximum heat input rate of such boiler(s) exceeds 50 million Btu per hour at any time after December 31, 1989 and the permitting applicabil ity levels specified in Env-A 607.01 are met. (d) Industrial boiler(s) shall be subject to the requirements ofEnv-A 1305 if the combined maximum heat input rate of such boiler(s) exceeds 50 million Btu per hour at any time after December 31, 1989 and the permitting applicability levels specified in Env-A 607.0 1 are met. (e) Stationary combustion turbine(s), except for combustion turbines mounted on aircraft and combustion turbines used as load shaving units or emergency generators, sha11 be subject to the requirements ofEnv-A 1306 ifthe combined maximum heat input rate ofsuch turbine(s) exceeds 25 million Btu per hour at any time after December 31, 1989 and the permitting applicability levels specified in Env-A 607.01 are met
. (f) Stationary internal combustion engine(s), except for stationary internal combustion engines used as load shaving units or emergency generators, shall be subject to the r equirements ofEnv-A 1307 if the combined maximum heat input rate of such engine(s) exceeds 4.5 million Btu per hour at any time after December 31, 1989 and the permitting applicability l evels specified in Env-A 607.01 are met. (g) Asphalt plant rotary dryer(s) shaH be subject to the requirements ofEnv-A 1308 if the combined maximum heat input rate of such dryer(s) exceeds 26.2 million Btu per hour at any time after December 31, 1989. (h) Incinerator(s), except for incinerators combusting sewage sludge, sha11 be subject to the requirements ofEnv

-A 1309 if the combined processing capacity of such incinerator(s) exceeds 85 tons per day or more of waste at any time after December 31 , 1989. (i) Wallboard dryer(s), calcining mill(s), calciner(s), and gypsum rock dryer(s) sha11 be subject to the requirements ofEnv-A 1310 if the combined theoretical potential em issions of such wallboard dryer(s), calcining mill(s), calciner(s), and gypsum rock dryer(s) equal or exceed 50 tons per calendar year of NOx at any time after December 31, 1989. (j) If the combined theoretical potential emissions from all devices and processes located at a stationary source exceed 50 tons per calendar year of NOx at any time after December 31, 1989, all stationary internal combustion engines or combustion turbines used as emergency generators at that source which meet the permitting applicability levels specified in Env-A 607

.0 I shall be subject to the requirements ofEnv-A 1311 unless:20 I0-8 I Adopted effective I0-3 1-1 0 2
(I) All su ch emergency generators are limited to less than 500 hours of operation during any consecutive 12-month period; and (2) The combined theoretical potential emissions of NOx from all such generators are limited to less than 25 tons for any consecutive 12-month period by permit conditions. (k) Auxiliary boiler(s) shall be subject to the requirements ofEnv-A 1312 if the combined theoretical potential emissions from all devices and processes located at the stationary source exceed 50 tons per calendar year of NOx at any time after December 31, 1989. (I) Load shaving unit(s) shall be subject to the requirements ofEnv-A 1313 if the combined theoretical potential emissions from all devices and processes located at the stationary source exceed 50 tons per calendar year of NOx at any time after December 31, 1989. (m) Any miscellaneous stationary sour ce at a stationary source h aving combined theoretical potential emissions f r om all devices and processes which equal or exceed 50 tons per calendar year of NOx at any time after December 31, 1989 shall be subject to the requirements of Env-A 1314, except for NOx-emitting devices that have implemented Best Available Control Technology (BACT) for NOx, or Lowest Achievable Emission Rate (LAER) for NOx at any t ime after December 31, 1989 pursuant to a federally enforceable permit. Any device or group of devices at a stationary source which meet the applicability criteria of(b) through (1), above, shall be subject to the requirements of the applicable parts. (n) Any stationary source having combined theoretical potential emissions of 50 tons or more of NOx during any consecutive 12-month period but whose actual NOx emissions have not equaled or exceeded 50 tons during any consecutive 12-month period since January 1, 1989, shall be subject to the requirements of this chapter, unless the following requirements are met: (1) The combined actual NOx emissions from NOx emitting devices or processes are limited to Jess than 50 tons during any consecutive 12-month period by an enforceable permit or consent decree; and (2) The source has been and remains in full compliance with the conditions of a permit issued by the department or by EPA, or the terms of any consent decree entered into by the department or by EPA, or any court order. (o) Once a stationary source becomes sub j ect to the requirements of this chapter, the source shall remain subject to these r equirements even if emissions subsequently fall below the applicability levels specified in (b) through (m), above

. (p) 

### Ifa stationary source fai Is to comply with any of the terms or conditi ons of a permit or consent decree, or court order referred to in (n), above, the source shall immediately become subject to the applicable requirements ofthis chapter. PART Env-A 1302 DEFINITIONS Env-A 1302.01 "Actual mole ratio" mean s the measured number of moles of one chemical divided by the measured number of moles of a second chemical in the same chemical system. Env-A 1302.02 "Add-on control" means a device or process used to collect, remove, convert or destroy gaseous NOx pollutants resulting from the combustion offuel or waste before these pollutants are released into the ambient air. Env-A 1302.03 "Asphalt" means a dark

-brown to black cementitious mater ial that is solid, semi-solid or liquid in consistency, in which the primary constituents are bitumens which occur in nature as such or are obtained as residue in refining petroleum.2010

-81 Adopted effective I0-31-10 3 Env-A 1302.04 "Auxiliary boiler" means a boiler operated to provide steam and house heat only when the primary steam or power source for a facility is not available for usc. Auxiliary boiler shall not include emergency generators and load shaving units. Env-A 1302.05 "Auxiliary fuel" means fuel, other than waste materials, used in an incinerator or resource recovery facility to attain temperatures suff iciently high enough to dry and ignite waste materials, to maintain ignition, or to drive the complete combustion of combust ible solids, vapors and/or gaseous substances. Env

-A 1302.06 "Classifiable process or device" means any process or device that emits NOx and is included in one of the categories listed in Env-A 1301.02(b) through (l), but is not subject to the requirements ofEnv-A 1303 through Env

-A 13 J3 because such process or device fall s below the applicability threshold. Env-A 1302.07 "Coal" means all solid fuels classified as anthracite, bituminous, lignite, or subbituminous according to the ASTM Standard Classification of Coa ls by Rank, ASTM D 388-99, coal refuse, and petroleum coke. The term includes coal-derived synthetic fuels, including but not limited to, solvent refined coal, gasified coal, coal

-oil mixtures, and coal

-water mixtures. Env

-A 1302.08 "Cogeneration facility" means a facility that generates steam for the purpose of supplying heat or energy to a manufacturing process in the host facility, and power for sale to an electric utility. Env-A 1302.09 "Coke" means a fused, cellular, porous structure that remains after free moisture and the major pot1ion of the volatile materials have been distilled from bituminous coal and other carbonaceous material by the application of heat in the absence of air or in the presence of a limited supply of air. Env-A 1302.10 "Combined cycle combustion turbine" means any stationary gas or oil-fired turbine which recovers heat from the turbine exhaust gases to heat water or generate steam. Env-A 1302.11 "Commercial fuel" means solid, liquid, or gaseous fuel normally produced or manufactured, and sold for the purpose of creating useful heat or mechanical energy. Env-A 1302.12 "Cyclone firing" means a fuel-firing process using one or more horizontal cylinders to burn fuel under conditions of high rates ofheat release, low rates of heat absorption by the cylinder walls, with centrifugal action imparted to the fuel particles by air entering the cylinder. The combustion gases exiting from the cylinders turn 90 degrees to go up through the boiler. The horizontal cylinders are attached to the bottom of the furnace with one or more of the cylinders arranged on one furnace wall or on 2 opposed furnace walls. Env-A 1302.13 "Dry bottom" means the boiler has a furnace bottom temperature below the ash melting point, and the bottom ash is removed as a solid. Env-A 1302.14 "Electric generating utility" means a utility which is regulated by the public utilities commission and which generates electricity for sale

. Env-A 1302.15 "Emergency generator" means "emergency generator" as defined in Env-A 101. Env-A 1302. I 6 "Emissions unit" means "emissions unit" as def ined in Env-A 10 I. Env-A 1302.17 "Face firing" means a furnace firing design in which the burners are mounted in an array on one or more vertical walls, including: (a) Opposed firing, where the burners are mounted on 2 opposite walls; and (b) Single

-wall firing, where the burners are mounted on only one wall. Env

-A 1302.18 "Fuel-bound nitrogen" means the nitrogen content, in weight fraction, of the fuel. Env-A 1302.19 "Gas or gaseous fuel" means natural gas , liquid petroleum gas, or gaseous substances produced synthetically from coal or oil, or derived from the decomposition of organic matter, or derived as20 1 0-81 Adopted cffective I 0-3 1 -1 0 4

a by-product of a manufacturing process, and which can be used to create useful heat and/or mechanical energy. Env-A 1302.20 "Industrial boiler" means a steam generating unit that generates steam to supply power and/or heat to an industrial, institutional or commercial operation, excluding boilers used by electric utilities, small power producers and cogenerators to generate electricity. Env-A 1302.21 "Internal combustion engine" means any engine in which power, produced by heat and/or pressur e developed in the engine cylinder(s) by burning a mixture of air and fuel, is subsequently converted to mechanical work by means of one or more pistons. Env-A 1302.22 "Lean burn engine" means a stationary internal combustion engine in which the amount of 0 2 in the engine exhaust gases is 1.0% or more, by weight, unless otherwise specified by the engine manufacturer. Env-A 1302.23 "Limited at all times" means that the NOx emissions of a source or device does not exceed the prescribed NOx emission limit over the averaging time specified in the applicable section of this part during the entire period of time that the source or device operates. Env-A 1302.24 "Liquid petroleum gas" means a flammable mixture ofhydrocarbon gases derived from petroleum refining or natural gas processing that meets the ASTM Standard Specification for Liquid Petroleum Gases, 01835-97. Env

-A 1302.25 "Load shaving unit" means a device used to generate electricity for sale or use during high electric demand days, including but not limited to stationary combustion turbines or stationary internal combustion engines. Env-A 1302.26 "Low-NOx emitting process" means a pr ocess that results in NOx emission reductions which constitute NOx RACT as approved by the division and EPA pursuant to Env-A 1315.05. Env-A 1302.27 "Manufacturing process" means any process directly related to the manufacturing of goods and/or supplies, both finished and intermediate, whose operations result in pollutant emissions to the ambient air from process or manufacturing equipment or machinery directly or through exhaust or ventilating systems, including elevated stacks. Env-A 1302.28 "Maximum allowable emission rate" means the maximum amount of an air contaminant which is allowed to be emitted into the ambient air during a prescribed interval of time. Env-A 1302.29 "Maximum heat input rate" means the maximum steady state fuel firing rate, in Btus per hour of gross heat input, of fuel burning equipment as determined in the design rating ofthe equipment manufacturer and the character istics of the fuel-burning devices. Env-A 1302.30 "Miscellaneous stationary source" means that portion of a stationary source, as defined in Env-A 101.185, consisting of devices and processes that are: (a) Unclassifiable; or (b) Classifiable. Env-A 1302.3 I "Mole" means the specific amount of chemical substance in a system proportional to its number of molecules, calculated as the mass of the chemical divided by its molecular weight. Env-A 1302.32 "Natural gas" means a naturally occurring mixture ofhydrocarbon and nonhydrocarbon gases found in geologic formations beneath the earth's surface, of which the principal constituent is methane.2010-81 Adopted effective 10-31-10 5 Env-A 1302.33 "Normalized stoichiometric ratio (NSR)" means the actual mole ratio of urea to NOx divided by the theoretical stoichiometric ratio, which is 0.5 for the reaction between urea and NOx. Env-A 1302.34 "NOx control technique" means a system, design modification, or use of equipment and technology to reduce NOx emissions to the ambient air from NOx-emitling devices or processes, including combustion modifications, low-NOx burners, overfire air systems, low excess air systems, flue gas recirculation, natural gas reburn, burners out of service, f uel switching, selective catalytic reduction, selective non-catalytic reduction, or other device or procedure approved pursuant to Env-A 1316. Env-A 1302.35 "Oxides of nitrogen (NOx)" means all oxides of nitrogen, except nitrous oxide, as measured in accordance with test methods specified in Env-A 800 and approved by EPA. Env-A 1302.36 "Ozone season" means the period between May I and September 30, inclusive. Env-A 1302

.37 "Power outage" means that normally available sources of electrical energy are unavailable due to circumstances beyond the control of the customer(s) ofthe power supplier(s). Env-A 1302.38 "RACT order" means a written order, providing for inventories and emission limits for NOx-emitting devices or processes and RACT-compliance procedures and schedules , issued by the division to a miscellaneous stationary source or a stationary source seeking alternative RACT emission limits pursuant to Env-A 1315.04. Env-A 1302.39 "Rated brake horsepower (bhp)" means the brake horsepower rating specified by the manufacturer and listed on the nameplate. Env

-A 1302.40 "Regenerative cycle combustion turbine" means any stationary gas or oil-fired turbine which recovers heat from the turbine exhaust gases to preheat inlet combustion air to the turbine. Env-A 1302.41 "Repowering" means the replacement or conversion of an existing emissions unit with a new or converted unit which results in lower emission rates ofNOx. Env-A 1302.42 "Rich burn engine" means any stationary internal combustion engine that is not a lean burn engine

. Env-A 1302.43 "Simple cycle combustion turbine" means any stationary gas or oil-fired turbine which does not recover heat from the turbine exhaust gases to preheat the inlet combustion air to the turbine, heat water or generate steam. Etw-A I302.44 "Shaker grate or vibrating grate" means a grate that mechanically oscillates or vibrates during loading of solid fuel to assist in the introduction of the fuel into the combustion zone, and in removing accumulat ion of fuel particle deposits on the grate surface. Env-A 1302.45 "Sma ll power production facility" means a power production facility that is designed for or capable of operating at a capacity of Jess than 30 megawatts and is not a cogeneration facility. Env-A 1302.46 "Stationary combustion turbine" means any simple cycle combustion turbine, regenerative cycle combustion turbine, or any combustion turbine pot1ion of a combined cycle steam/ electric generating system that is not self-propelled, but which can be mounted on a vehicle for portability. Env-A 1302.47 "Stationary grate" means a grate that is permanently affixed during normal boiler operation. Env-A 1302.48 "Stationary internal combustion engine" means any internal combustion engine that operates as a stationary source, but which can be mounted on a vehicle for portability. Env

-A 1302.49 "Steam el ectric boiler" means a steam generating unit, as defined in Env-A 1302.49, that is constructed and operated for the purpose of supplying more than one-third of its potential electrical20 I 0-81 Adopted effective I0-31-10 6 output to any utility power distribution system for sale which is located at a cogeneration or small power production facility. Env-A 1302.50 "Steam generating unit" means a device that combusts any fuel or byproduct/waste to produce steam or to heat water or any other heat transfer medium. Env-A 1302.51 "Stoker" means a furnace design that incorporates a feeding mechanism, fuel distribution and ash residue collection system for the purpose ofintroducing soli d fuel into the combustion zone of the furnace by feeding the fuel onto a grate. Env-A 1302.52 "Tangential firing" means a boiler firing design where the burners and air nozzles are mounted in each corner of the furnace chamber where the vertical furnace walls meet. Both the fuel and air are directed from the furnace comers along a line tangential to a circle lying in a horizontal plane of the furnace. Env-A 1302.53 "Theoretical potential emissions" means the quantity of nitrogen oxides that could be emitted by a source, prior to the application of add-on controls, based on either of the following: (a) Continuous operation of 8760 hours per year at the maximum heat input rate of the source; or (b) Hour s of operation, process conditions, or both that are limited by the condition s of a federally enforceable permit. Env-A 1302.54 "Traveling grate" means a grate designed to move at a constant velocity during the loading of solid fuel to assist in the introduction offuel into the combustion zone. Env-A 1302.55 "Unclassifiable process or device" means any process or device that emits NOx but is not included in any of the categories listed in Env-A 130 J.02(b) through (1). Env-A 1302.56 "Utility boiler" means a steam generating unit that is constructed and operated for the purpose of supplying more than one-third ofits potential electrical output capacity to any utility power distribution system for sale, except for steam electric boilers, as defined in Env-A 1302.48. Env-A 1302.57 "Wet bottom " means the boiler has a furnace bottom temperature above the ash melting point and the bottom ash is removed as a liquid. PART Env-A 1303 UTILITY BOILERS Env-A 1303.01 Applicability. All utility boilers meeting the applicability criteria ofEnv-A 1301.02(b) shall be subject to this part. Env-A 1303.02 Timing ofEfficiencv Tests; Process Adjustments. The owner or operator of one or more utility boiler(s) having a heat input rate of at least 5 million Btu per hour but less than 50 million Btu per hour per boiler shall, before April 1st of each year: (a) Perform an efficiency test on each boiler using the test procedures specified in chapter 3, Combustion Efficiency Tables, Taplin, Harry, R. , Fairmont Press, 1991; and (b) Adjust the combustion process of each boiler in accordance with the procedures specified in chapter 5, Combustion Efficiency Tables, Taplin, Harry, R., Fairmont ,Press, 1991. Env-A 1303.03 R ecordkeeping for Efficiency Tests. The owner or operator of one or more utility boiler(s) with a heat input rate of at least 5 million Btu per h our but less than 50 million Btu per hour per boiler shall maintain , in a format that can be retained unaltered for the time period specified in Env-A 902, th

e following information for each efficiency test: (a) The date(s) on which:2010-81 Adopted effective 10-31

- 10 7 (1) The eff i ciency test was conducted; and (2) The combustion process was last adjusted; (b) The name(s), title(s), and affiliation(s) of the individual(s) who: (I) Conducted the efficiency test; and (2) Made the adjustments; (c) The NOx emission concentration, in pans-per-million by volume, dry basis (ppmvd), corrected to 15% oxygen, after the adjustments are made; (d) The CO emission concentration, in ppmvd, corrected to 15% oxygen, after the adjustments are made; (e) The opacity readings; and (t) Any other information required by Env-A 903 or Env-A 905. Env-A 1303.04 RACT Requirements. Each utility boiler having a heat input rate of at least 50 million BTU per hour shall comply with the applicable NOx RACT requirements specified in Env-A 1303.05 through Env-A 1303.07. Env-A 1303.05 RACT Requirements: Wet-Bottom Utility Boilers Firing Coal. For wet-bottom utility boilers firing coal, whether by itself or in combination with any other fuel(s), the NOx RACT requirements shall be as follows: (a) For tangential or face-fi red boilers, an emission limit of 1.0 lb. per million Btu, based on a 24- hour calendar day average; (b) For cyclone-fired boilers having a maximum net power output of less than 320 megawatts at all times after December 31, 1989, an emission limit of 0.92 lb. per million Btu based on a 24-hour calendar day average; or (c) For cyclone-fired boilers having a maximum net power output of more than 320 megawatts at any time after December 31, 1989, the emission limit specified in (d), below, coupled with one of the following: (I) An emission limit of 1.40 lb. per million Btu based on a 24-hour calendar day average; (2) The installation, operation, and maintenance of selective non-catalytic reduction (SNCR) technology with a minimum normalized stoichiometric ratio (NSR) of 1: 1; or (3) The installation, operation, and maintenance of NOx RACT air pollution control equipment or an air pollution control pr ocess having equivalent or gr eater NOx removal efficiency as SNCR, approved by the department and EPA; and (d)

- Wet-bottom cyclone-fired utility boilers shall be limited at all times to the equivalent of 15.4 tons of NOx per 24-hour calendar day. Env-A 1303.06 RACT Requirements: Dry-Bottom Utility Boilers Firing Coal and/or Oil. For drybottom utility boilers that fire, or that are capable of firing, coal or oil, or any combination thereof, the NOx RACT requirements shall be as follows: (a) For tangential-fired boilers, an emission limit of 0.38 lb. per million Btu, based on a 24-hour calendar day average; (b) For face-fired boilers, an emission limit of 0.50 lb. per million Btu, based on a 24-hour calendar clay average; and20 I 0-8 I Adopted effective I0-31

- 1 0 8 (c) For stoker-fired boilers, an emission limit of 0.30 lb. per million Btu, based on a 24-hour calendar day average. Env-A 1303.07 R/\CT Requirements: Utility Boilers Firing Oil. Gas. and/or Wood

. (a) For utility boilers that fire, or that ar e capable of firing, oil or gas, or any com bination thereof, the NOx RACT requirements shall be as follow s: (I) For tangential or face-fired boilers when firing exclusively oil, an emiss ion limit of0.35 lb. per million Btu, based on a 24-hour calendar day aver age; (2) For face-fired boilers when firing gas or any combination of oil and gas, an emission limit of 0.25 lb. per million Btu based on a 24-hour calendar day average; and (3) For tangential -f ired boilers when firing gas or any combination of oil and gas, an emission limit of 0.25 lb

. per million Btu based on a 24-hour calendar day average; (b) For boilers that fire gas exclusively, an emission limit of 0.20 lb

. per million Btu, based on an hourly average, for tangential or face-fired boilers; and (c) For boilers that fire wood fuel or that ar e capable of firing a combination of wood fuel and oil: ( I ) For boilers equipped with a traveling, shaker, or vibrating grate, an emission limit of 0.33 lb. per million Btu, based on a 24-hour calendar day average; and (2) For boilers equipped with a stationary grate, an emission limit of 0.25 lb. per million Btu , based on a 24-hour calendar day average. (d) Utility boilers that fire any fuel or combination of fuels excluding coal shall be limited at all times to the equivalent of 3

.8 tons of NOx per 24-hour calendar day. Env-A 1303.08 Retiri ng or Rcpower ing Utility Boilers. Nothing in this chapter shall prohibit the retiring or repowering of a utility boiler at any time after the effective date of this c hapter. Utility boilers shall remain subject to the applicable NOx RACf emission limits specified in this chapter, regardless of a decision to retire or repower the boiler. PART Env-A 1304 STEAM ELECTRIC BOILERS Env-A 1304.01 Applicability. All st eam e lectr ic boilers that meet the applicability criteria of Env-A 1301.02(c) shall be subject to this part. Env-A 1304.02 Timing of Efficiency Tests; Pr ocess Adjustments. The owner or operator of one or more steam electric boiler(s) having a heat input rate of at least 5 million Btu per hour but less than 50 million Btu per hour per boiler shall, bef ore April 1st of each year: (a) Perform an efficiency test for each boiler using the test procedures specified in chapter 3, Combustion Eff iciency Tables, Taplin, Harry, R. , Fairmont Press, 1991; and (b) Adjust the combusti on process of each boiler in accordance with the procedures specified in chapter 5 , Combustion Efficiency Tables, Taplin, Harry R., Fairmont Press , 1991. Env-A 1304.03 Recordkeeping for Efficiency Tests. The owner or operator of one or more steam electric boiler(s) having a heat input rate of at least 

### 5 million Btu per hour but less than 50 million Btu per hour per boiler shall maintain, in a format that can be retained unaltered for the time period specified in Env-A 902, the following informat i on for each ef ficiency test: (a) The date(s) on which:20 I 0-81 Adopted effecti vc I 0-31-1 0 9 (l) The efficiency test was conducted; and (2) The combustion process was last adjusted; (b) The name(s), title(s), and affiliation(s) of the individual(s) who: (I) Conducted the efficiency test; and (2) Made the adjustments; (c) The NOx emission concentration, in ppmvd, corrected to 15% oxygen, after the adjustments are made; (d) The CO emission concentration, in ppmvd, corrected to 15% oxygen, after the adjustments are made; (e) The opacity readings; and (f) Any other information required by Env-A 903 or Env-A 905. Env-A 1304.04 RACT Requirements

. (a) Any steam electric boiler having a heat input rate of at least 50 million Btu per hour but less than 100 million Btu per hour shall comply with the applicable NOx RACT requirements specified in EnvA 1305.04, for the applicable fuel type and fuel-firing design

. (b) Any steam electric boiler having a heat input rate of 100 million Btu per hour or more shall comply with the applicable NOx RACT requirements specified in Env-A 1305.10 for the applicable fuel type and fuel-firing design. PART Env-A 1305 INDUSTRIAL BOILERS Env-A 1305.01 Applicability. All industrial boilers that meet the applicability criteria ofEnv-A 1301.02(d) shall be subject to this pmt. Env

-A 1305.02 Timing ofEfficiency Tests: Adjustments. The owner or operator of one or more industrial boiler(s) having a heat input rate of at least 5 million Btu per hour but less than 50 million Btu per hour per boiler shall, before April 1st of each year: (a) Perform an efficiency test on each boiler using the test procedures specified in chapter 3, Combustion Efficiency Tables, Taplin, Harry, R., Fairmont Press, 1991; and (b) Adjust the combustion process of each boiler in accordance with the procedures specified in chapter 5, Combustion Efficiency Tables, Taplin, Harry R., Fairmont Press, 1991. Env-A 1305.03 Recordkeeping for Efficiency Tests

. The owner or operator of one or more industrial boiler(s) having a heat input rate of at least 5 million Btu per hour but less than 50 million Btu per hour per boiler shall maintain, in a format that can be retained unaltered for the time period specified in Env

-A 902, the following information for each efficiency test: (a) The date(s) on which : (1) The efficiency test was conducted; and (2) The combustion process was last adjusted; (b) The name(s), title(s), and affiliation(s) of the individual(s) who: ( I) Conducted the efficiency test; and20 I0-81 Adopted effective I0-3 1-1 0 I0 (2) Made the adjustments; (c) The NOx emission concentration, in ppmvd, corrected to 15% oxygen, after the adjustments a re made ; (d) The CO emission concentration, in ppmvd, corrected to 15% oxygen, after the adjustments are made; (e) The opacity readings; and (f) Any other information required by Env-A 903 or Env-A 905. Env-A 1305.04 RACT Requirements for Industrial Boilers with Heat Input R ates Less than 100 Million Btu Per Hour. (a) Any industrial boiler having a heat input rate of at least 50 million Btu per hour but less than 100 million Btu per hour shall comply with the applicable NOx RACT requirements specified in Env-A 1305.05 through Env-A 1305.09. (b) For purposes ofEnv-A 1305.06 through Env-A 1305.08, NOx RACf control technology shall be: (I) The installation, operation, and maintenance of low NOx burners (LNB); or (2) The installation, operation, and maintenance of air pollution control equipment or an air pollution control process having equivalent or greater NOx removal efficiency as LNB, as approved by the department and EPA as specified in Env-A 13 I6 relative to NOx RACT orders. Env-A 1305.05 RACT Requirements: Dry Bottom Industrial Boilers Firing Coal and/or Oil. For dry

bottom industrial boilers that fire, or that are capable of firing, coal or oi I, or any combination thereof, the NOx RACT requirements shall be as fol l ows: (a) For tangential-fired boilers , an emission limit of 0.38 lb. per million Btu, based on a 24-hour calendar day average; (b) For face-fired boilers, an emission limit of 0.50 lb. per million Btu, based on a 24-hour calendar day average; and (c) For stoker-fired boilers, an emission limit of 0.30 lb. per million Btu, based on a 24

-hour calendar day average. Env-A 1305.06 RACT Requirements: Boilers Firing Oil Exclusively

. For tangential or face-fired boilers only capable offiring oil, the NOx RACT requirements shall be as follows: (a) For boilers firing No. 2 fuel oil exclusively, an emission limit of 0.12 lb. per million Btu, based on an hourly average; and (b) For boilers firing No. 4, 5, or 6 fuel oil , or any combination thereof: (I) An emission limit of0.30 lb. per million Btu, based on a 24-hour calendar day average; or (2) Implement NOx RACT control technology as specified in Env-A 1305.04(b). Env-A 1305

.07 RACT Requirements: Boilers Firing Oil and G as . For tangential orface-fired boilers that fire, or that are capable offiring , a combination of oil and gas, the NOx RACT requirements shall be as follows: (a) When firing gas exclusively: (1) An emission limit of 0.10 lb. per million Btu, based on an hourly average; or2010

-81 Adopted effective l 0

-31

- 10 I I (2) Implement NOx RACT control technology as specified in Env-A l305.04(b)

. (b) When firing oil exclusively: (I) When firing No. 2 fuel oil exclusively, an emission limit of 0.12 lb. per million Btu, based on an hourly average; and (2) When firing No. 4, 5, or 6 fuel oil, or any combination thereof:
a. An emission limit of 0.30 lb. per million Btu , based on a 24-hour calendar day average; or b. Implement NOx RACT control technology as specified in Env-A 1305.04(b). (c) When firing a combination of oil and gas: (1) When firing gas and No. 2 fuel oil, an emission limit of 0.12 lb. per million Btu, based on an hourly average; and (2) When firing gas and No.4, 5, or 6 fuel oil, or any combination thereof:
a. An emission limit of 0

.30 lb. per million Btu, based on a 24-hour calendar day average; or b. Implement NOx RACT control technology as specified in Env-A 1305.04(b). Env-A I305.08 RACT Requirements: Boilers Firing Gas Exclusively. For boilers only capable of firing gas, the NOx RACT requirements shall be as follows: · (a) An emission limit ofO.lO lb. per million Btu, based on an hourly average; or (b) Implement NOx RACT control technology as specified in Env-A 1305.04(b). Env-A J305.09 RACT Requirements: Boilers Firing Wood. For boilers that fire wood fuel, or that are capable of firing wood fuel, whether alone or in combination with oil, the NOx RACT requirements shall be as follows: (a) For boilers equipped with a traveling, shaker, or vibrating grate, an emission limit of 0.33 lb

. per million Btu, based on a 24-hour calendar day average; and (b) For boilers equipped with a stationary grate, an emission limit of 0.25 lb. per million Btu based on a 24-hour calendar day average. Env-A 1305.10 RACT Requirements for Industrial Boilers with Heat Input Rates of 100 Million Btu Per Hour or More. (a) Any industrial boiler having a heat input rate of I00 million Btu per hour or more shall comply with the applicable NOx RACT requirements specified in Env-A 1305.11 through Env-A 1305.15. (b) For purposes ofEnv-A 1305.13 through Env-A 1305

. 15, NOx RACT control technology shall be: (1) The installation, operation, and maintenance of low NOx burners (LNB); or (2) The installation, operation, and maintenance of air pollution control equipment or an air pollution control process having equivalent or greater NOx removal efficiency as LNB, as approved by the department and EPA as specified in Env-A 1316 relative to NOx RACT orders. Env-A 1305.11 RACT Requirements: Wet-Bottom Industrial Boilers Firing Coal. For wet-bottom boilers that fire coal or that are capable of firing coal, whether by itself or in combination with any other fuel( s), the NOx RACT requirements shall be as follows:201 0-81 Adopted effcctivc I0-31

- 10 12 (a) For tangential or face-fired boilers, an emission limit of 1.0 lb. per million Btu, based on a 24

- hour calendar day average; and (b) For cyclone-fired boilers, an emission limit of 0.92 lb. per million Btu, based on a 24-hour calendar day average; Env

-A 1305.12 RACT Rcguirements: Dry

-Bottom Industrial Boilers Firing Coal an d/or Oil. For dry

bottom boilers that fire, or that are capable of firing, coal or oil, or any combination thereof , the NOx RACT requirements shall be as follows: (a) For tangential

-fired boilers, an emission limit of 0.38 lb. per million Btu, based on a 24-hour calendar day average; (b) For face-fired boilers, an emission limit of 0.50 lb. per million Btu, based on a 24-hour calendar day average; and (c) For stoker-fired boilers, an emission limit of 0.30 lb. per million Btu, based on a 24-hour calendar day average; Env-A 1305.13 RACf R cguircments : Indust rial Boilers F ir

ing Oil and/or Gas. For boilers that fire , or that are capable of firing, oil or gas, or any combination thereof, the NOx RACT requirements shall be as follows: (a

) For tangential or face-fired boilers when firing oil exclusively: ( 1) An emission limit of0.30 lb. per million Bt u, based on a 24-hour calendar day average; or (2) Implement NOx RACT control technology as specified i n Env-A 1305.10(b); and (b) For tangential or face-fired boilers when firing gas, or any combination of oil and gas, an emission limit of 0.25 lb

. per million Btu based on a 24-hour calendar day average. Env-A 1305.14 R ACf Reguiremen ts : Industrial Boilers F iring Gas Exclusively

. For boilers that arc only capable of firing gas, the NOx RACT requir ements shall be as follows: (a) For tangential or face-fired boilers, an emission limit of 0.10 lb. per million Btu, based on an hourly average; or (b) Implement NOx RACT control technology as specified in Env

-A 1305.1 O(b)

. Env

-A 1305.15 RACf Reguir ements: Boilers Firing Wood. For boilers that fire wood fuel , or that are capable offiring wood fuel, whether alone or in combination with oil , the NOx RACT requirements shall be as follows: (a) For boilers equipped with a traveling, shaker, or vibrating grate, an emission limit of 0.33 lb. per million Btu, based on a 24-hour calendar day average; and (b) For boilers equipped with a stationary grate, an emission limit of0.25lb

. per million Bt u, based on a 24-hour calendar day average. PART Env-A 1306 COMBUSTION TURBINES Env

-A 1306.01 Applicability. (a) All combustion turbin es meeting the applicability criteria ofEnv-A 130 1.02(e) shall be subject to this part.2010-81 Adopted effective 1 0-31-l 0 13 (b) Combustion turbines excluded from Env-A 1301.02(e) because they are used as emergency generators shall be subject to Env-A 1311 in lieu of this pmt if they meet the applicability criteria ofEnvA 130 1.020). (c) Combustion turbines excluded from Env-A 1301

.02(e) because they are used as load shaving units shall be subject to Env-A 1313 in lieu of this part if they meet the applicability criteria ofEnv-A 130 1.02(1). Env-A 1306.02 Emission Standards for Combustion Turbines Constructed After May 27, 1999. A gas-fired turbine constructed after May 27, 1999 shall not exceed an hourly average NOx RACT emission limit of 25 ppmvd, corrected to 15% 0 2, equivalent to 0.092 lb. per million Btu, when operating on gas. Env-A 1306.03 Emission Standards for Combustion Turbines. A combustion turbine that is not subject to.Env-A 1306.02 shall be limited a t all times to the applicable hourly average NOx RACT emission limits specified below: (a) For combined and regenerative cycle combustion turbines: (I) For gas-fired turbines without oil back

-up, 42 ppmvd, corrected to 15% 02, or 0

. 155 lb. per million Btu; (2) For gas-fired turbines with oil back-up, the more stringent of:
a. When operating on gas , 42 ppmvd, corrected to 15% 02, or 0.155 lb

. per million Btu; or b. When operating on oil, 65 ppmvd, corrected to 15% 02, or 0.253 lb. per million Btu; and (3) For oil-fired turbines, 65 ppmvd, corrected to 15% 02, or 0.253 lb. per million Btu; (b) For simple cycle combustion turbines: (I) For gas-fired turbines without oil back-up, 55 ppmvd, corrected to 15% 02, or 0

.203 lb. per million Btu; (2) For oil-fired turbines, 75 ppmvd, corrected to 15% 02, or 0

.292 lb. per million Btu; and (3) For gas-fired turbines with oil back-up:
a. When operating on gas, 55 ppmvd, corrected to 15% 02, or 0.203 lb. per million Btu; and b. When operating on oil, 75 ppmvd, corrected to l 5% 02, or 0.292 lb. per million Btu

.

. PART Env-A 1307 STATIONARY INTERNAL COMBUSTION ENGINES Env-A 1307.01 Applicability

. (a) All stationary internal combustion engines meeting the applicability criteria ofEnv

-A 130 1.02(t) shall be subject to this part. (b) Stationary internal combustion engines excluded from Env-A 1301.02(t) because they are used as emergency generators shall be subject to Env-A 13 l 1 in lieu of this part if they meet the applicability criteria ofEnv-A 130 l.02U). (c) Stationary internal combustion engines excluded from Env-A 130 1.02(t) because they are used as load shaving units shall be subject to Env-A 1313 in lieu of this part if they meet the applicability criteria ofEnv-A 130 1.02(1). Env-A 1307.02 Emission Standards for Stationary Internal Combustion Engines. Stqtionary internal combustion engines shall not exceed the hourly average NOx RACT emission limits specified below:2010-81 Adopted effective 10-31-10 14 (a) For rich burn internal combustion engines, 1.5 grams per rated brake horsepower- hour (bhp-hr) for gas-fired units; and (b) For lean burn internal combustion engines: (I) For gas-fired units, 2.5 grams per bhp-hr; and (2) For oil-fired units, 8.0 grams per bhp-hr, or 2.44 lb. per million Btu. PART Env-A 1308 ASPHALT PLANT ROTARY DRYERS Env-A 1308.01 Applicability

. Any asphalt plant rotary dryer meeting the applicability criteria of Env-A 130 1.02(g) shall be subject to this part. Env-A 1308.02 Definitions. For the purpose of this part, the following definitions shall apply: (a) "Batch type asphalt plant" means an asphalt plant where equipment external to the rotary dryer is used to mix the aggregate and asphalt cement or other binder; (b) "Drum mix type asphalt plant" means an asphalt plant where the asphalt cement or other binder is added to the aggregate while the aggregate is in the rotary dryer; and (c) "Rotary dryer" means a cylinder which rotates about a fixed axis and through which hot gases are passed for the purpose of removing moisture from solid material. Env-A 1308.03 Emission Standards for Asphalt Plant Dryers. Any asphalt plant rotary dryer, whether a batch type asphalt plant or a drum mix type asphalt plant, shall not exceed an hourly average NOx RACT emission limit of 0.12 lb. per ton of asphalt produced, equivalent to 0.429 lb. per million Btu. PART Env

-A 1309 INCINERATORS Env-A 1309.01 Applicability. (a) All incinerators meeting the applicability criteria ofEnv-A I30 1.02(h) shall be subject to the provisions of this part. (b) Incinerators excluded from Env-A 130 1.02(h) because they combust sewage sludge shall be subject to Env-A 1314 in lieu of this part if they meet the applicability criteria ofEnv

-A I.30 1.02(m}. Env

-A 1309.02 Emission Standards for Incinerators. An incinerator shall not exceed a 24-hour calendar day average NOx RACT emission limit of 0.53 lb

. per million Btu. 

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.01 Applicability. Any wallboard dryer, calcining mill, calciner, or gypsum rock dryer meeting the applicability criter ia ofEnv-A 130 1.02(i) shall be subject to this part. Env-A 1310.02 Emission Standards for Wallboard Manufacturing Facilities. (a) Any wallboard dryer, calcining mill, calciner, or gypsum rock dryer shall comply with the applicable NOx RACT requirements specified in Env-A 1310.03 and Env-A 1310.04

. (b) For purposes ofEnv-A 1310.03 and Env-A 1310.04, NOx RACT control technology shall be: (1) The installation, operat ion, and maintenance of low NOx burners (LNB); or20 I0-81 Adopted effcctive 10-31-10 15 (2) The installation, operation, and maintenance of air pollution control equipment or an air pollution control process having equivalent or greater NOx removal efficiency as LNB, as approved by the department and EPA as specified in Env-A 1316 relative to NOx RACf orders. Env-A 1310.03 Emission Standards for Wallboard Manufacturing Facilities Firing Natural Gas. For wallboard dryers, calcining mills, calciners, and gypsum rock dryers firing nawral gas, the NOx RACT requirements shall be as follows: (a) An emission limit of 0. J 0 lb. per million Btu, based on an hourly average; or (b) Implement NOx RACT control technology as specified in Env-A 13 10.02(b). Env-A 1310.04 Emission Standards for Wallboard Manufacturing Facilities Firing Oil. For wallboard dryers, calcining mills, calciners , and gypsum rock dryers firing fuel oil, the NOx RACT requirements shall be as follows: (a) When firing #2 fuel oil: (I) An emission limit of 0.10 lb. per million Btu, based on an hourly average; or (2) Implement NOx RACT control technology as specified in Env-A 131 0.02(b). (b) When firing #4,#5, or #6 fuel oil: (I) An emission limit of 0.30 lb. per million Btu, based on a 24- hour calendar day average; or (2) Implement NOx RACT control technology as specified in Env-A 1310.02(b). PART Env-A 1311 EMERGENCY GENERATORS Env-A 1311.01 Applicability. Emergency generators meeting the applicability criteria ofEnv

-A 1301.020) shall be subject to this part. Env-A 1311.02 Operating Hours: Limit, Consequences ofExceeding Limit. (a) Each emergency generator subject to this part shall be limited to less than 500 hours of operation per year during any consecutive 12-month period by an enforceable permit issued by the department. (b) If the hours of operation of any emergency generator exceed 500 hours for any consecutive 12- month period, then: ( 1) The owner or operator of the emergency generator shall notify the department in writing within 10 days of the exceedance; and (2) The emergency generator shall immediately become subject to the requirements ofEnv-A 1306 or Env-A 1307, as applicable to the device type and fuel type. Env-A 1311.03 Control Requirements for Stationary Combustion Turbines. The owner or operator of a stationary combustion turbine used as an emergency generator shall: (a) Adjust the combustion process of the combustion turbine, before April 1st of each year, in accordance with the following: (I) Inspect the burner, the flame pattern from the burner, and the systems which control the air-to-fuel ratio; (2) Adjust the air-to-fuel ratio in accordance with the results of the inspect ions performed; (3) Determine the effect of the adjustment upon NOx emissions;l11 (3) The exhaust port temperature increases beyond the manufacturer's recommended maximum operating temperature; or (4) The opacity of the emissions from the engine exhaust is equal to or greater than 20% opacity; (b) Install, operate, and maintain an elapsed time meter for each engine to indicate, in cumulative hours, the elapsed engine operating time for the previous 12 months; (c) Determine the hours of operation for each engine for the previous 12-month period on a monthly basis; and (d) Maintain records to cert if

y that the ignition timing of the engine has been inspected and adjusted at least once every 3 years.2010-81 Adopted effective I0-31-10 15 (2) The installation, operation, and maintenance of air pollution control equipment or an air pollution control process having equivalent or greater NOx removal efficiency as LNB, as approved by the department and EPA as specified in Env-A 1316 relative to NOx RACT orders. Env-A 1310

.03 Emission Standards for Wallboard Manufacturing Facilities Firing Natural Gas. For wallboard dryers, calcining mills, calciners, and gypsum rock dryers firing natural gas, the NOx RACT requirements shall be as follows: (a) An emission limit of 0.10 lb. per million Btu, based on an hourly average; or (b) Implement NOx RACT control technology as specified in Env-A 1310.02(b). Env

-A 1310.04 Emission Standards for Wallboard Manufacturing Facilities Firing Oil. For wallboard dryers, calcining mills , calciners, and gypsum rock dryers firing fuel oil, the NOx RACT requirements shall be as follows: (a) When firing #2 fuel oil: (I) An emission limit of 0.10 lb. per million Btu, based on an hourly average; or (2) Implement NOx RACT control technology as specified in Env-A I31 0.02(b). (b) When firing #4,#5, or#6 fuel oil: (I) An emission limit of 0.30 lb. per million Btu, based on a 24- hour calendar day average; or (2) Implement NOx RACT control technology as specified in Env-A 131 0.02(b). PART Env

-A 1311 EMERGENCY GENERATORS Env-A 1311.01 Applicability. Emergency generators meeting the applicability criteria of Env-A 130 1.02U) shall be subject to this part. Env-A I311.02 Operating Hours: Limit, Consequences of Exceeding Limit. (a) Each emergency generator subject to this part shall be limited to less than 500 hours of operation per year during any consecutive 12-month period by an enforceable permit issued by the department. (b) If the hours of operation of any emergency generator exceed 500 hours for any consecutive 12- month period, then: (I) The owner or operator of the emergency generator shall notify the department in writing within 10 days of the exceedance; and (2) The emergency generator shall immediately become subject to the requirements ofEnv-A 1306 or Env-A 1307, as applicable to the device type and fuel type. Env-A 1 311.03 Control Requirements for Stationary Combustion Turbines. The owner or operator of a stationary combustion turbine used as an emergency generator shall : (a) Adjust the combustion process of the combustion turbine, before April 1st of each year, in accordance with the following: (1) Inspect the burner, the flame pattern from the burner, and the systems which control the air

-to-fuel ratio; (2) Adjust the air-to-fuel ratio in accordance with the results of the inspections performed; (3) Determine the effect of the adjustment upon NOx emissions;20I0-81 Adopted effective I0-3 1-10 16 (4) Re-adjust the air-to

- fuel ratio based on results of the previous adjustment performed to minimize total NOx em issions; and (5) Conf irm that NOx emissions from the equipment or source operat ion do not cause an exceedance of any maximum allowable emission rate for NOx or any other state and federally regulated air pollutant, or any opacity standard specified in Env-A 2000; (b) Maintain, in a f ormat that can be retained unaltered for the time period specified in Env-A 902, the following information: ( 1) The date on which the combustion process was last adj usted; (2) The name, title, and affiliation of the individual who made the adjustments; (3) The NOx emission concentration, in ppmvd, corrected to 15% oxygen, after the adjustments are made; (4) The CO emission concentration, in ppmvd, corrected to 15% oxygen, after the adjustments are made; (5) The opacity readings; and (6) Any other information required by Env-A 903 orEnv-A 905; (c) Install, operate, and maintain an elapsed time meter for each engine to indicate, in cumulative hours, the elapsed engine operating time for the previous 12 months; and (d) Determine the hours of operation for each engine for the previous 12-month period on a monthl y basis. Env-A 13 11

.04 Control Requirements for Stat ionary Internal Combustion Engines Having Manual A

djustment Capabilities . The owner or operator of a stationary internal combustion engine that is used as an emergency generator and that allows for manual adjustment of the air-to-fuel ratio or ignition timing in order to affect the combustion process, shall: (a) Set and maintain the ignition timing of the engine 4 degrees retarded relative to standard timing, provided that the ignition timing shall not be retarded beyond the point that: (1) The CO emission concentration increases beyond 100 pmvd, corrected to 15% oxygen ; (2) The turbocharger speed is increased beyond the maximum operating speed recommended by the manufacturer; (3) The exhaust port temperature increases beyond the manufacturer's recommended maximum operating temperature; or (4) The opacity of the emissions from the engine exhaust is equal to or greater than 20% opacity; (b) Install , operate, and maintain an elapsed time meter for each engine to indicate, in cumulative hours, the elapsed engine operating time for the previous 12 months; (c) Determine the hours of operation for each engine for the previous 12-month period on a monthly basis; and (d) Maintain records to certify that the ignition t iming of the engine has been inspected and adjusted at least once every 3 years.2010-81 Adopted effective 10-31- I 0 17

Env-A I 3 I 1.05 Control Requirements and Emission Limits for Stationary Internal Combustion Turbines Not Having Manual Adjustment Capabilities. The owner or operator of a stationary internal combustion engine that is used as an emergency generator and that does not allow for manual adjustment of the air-to

-fuel ratio or ignition timing in order to affect the combustion process, shall: (a) Install, operate, and maintain an elapsed time meter for each engine to indicate, in cumulative hours, the elapsed engine operating time for the previous 12 months; {b) Determine the hours of operation for each engine for the previous 12-month period on a monthly basis; (c) Operate the generator in conformance with the generator manufacturer's instructions, such as following maintenance and operating requirements to help minimize emissions; and (d) Engines subject to 40 CPR Part 60 shall maintain the generator manufacturer's instructions at the facility so that they arc available for review. Env-A 1311.06 Calculating Emissions. The emissions from emergency generators shall be included in the calculation ofboth the actual and theoretical potential emissions from a stationary source. PART Env-A 1312 AUXILIARY BOILERS Env

-A 1312.01 Applicability

. An auxiliary boiler meeting the applicability criteria ofEnv-A 130 1.02(k) shall be subject to this part. Env-A 1312.02 Emission Standards for Auxiliary Boilers. (a) An auxiliary boiler with a heat input rate ofat least 5 million Btu per hour but Jess than 50 million Btu per hour shall comply with Env-A 1305

.02 and Env-A 1305.03. (b) An auxiliary boiler with a heat input rate ofat least 50 million Btu per hour, shall not exceed a NOx RACT emission limit of 0.20 lb. per million Btu based on a 24-hour calendar day average, regardless of the type of fuel burned. Env-A 13 I2.03 Calculating Emissions. The emissions from all auxiliary boilers shall be included in the calculation of both the actual and theoretical potentia l emissions from the stationary source. PARTEnv-A 1313 LOAD SHAVING UNITS Env-A 1 313.01 Applicabil ity. (a) All load shaving units meeting the applicability criteria ofEnv-A 1301.02(1) shall be subject to this part. (b) If the actual NOx emissions f rom any load shaving unit exceed 50 tons during any consecutive 12

-month period, the load shaving unit shall immediately become subject to the requir ements ofEnv-A 1306 or Env-A 1307, as applicable to the device type and fuel type. Env-A I 3 I3.02 Emission Standards for Load Shaving Units. (a) Stationary combustion turbines used as load shaving units shall not exceed a NOx RACT emission limit of 0.90 lb. per million Btu heat input based on an hourly average for any type of fuel. (b) Stationary internal combustion engines used as load shaving units shall not exceed the applicable hourly average NOx RACT emission limits specified below :20I0-8 1 Adopted effective I0-31-1 0 I8
(I) For rich burn internal combustion engines, 2.0 grams per bhp

-hr for gas-fired units; and (2) For Jean burn internal combustion engines:
a. For gas-fired units, 3.0 grams per bhp-hr; and b. For oil-fired units, 9.0 grams per bhp-hr, or 2.74 lb

. per million Btu. Env-A 1313.03 Calculating Emissions. The emissions from all load shaving units shall be included in the calculation of both the actual and theoretical potential emissions from the stationary source. PART Env-A 1314 MISCELLANEOUS STATIONARY SOURCES Env-A 13 I4.01 Emission Standards and Control Options for Miscellaneous Stationary Sources. Owners or operators of any miscellaneous stationary sources meeting the applicability criteria of Env-A 1301.02(m) shall: (a) Initiate and implement a study of RACT control options, consisting of a detailed examination of technological and economic feasibility of available NOx cont rol techniques for all classifiable and unclassifiable NOx-emitting sources, devices, or processes; and (b) Apply for and obtain from the department a RACT order in accordance with Env-A 1316. PART Env-A 1315 RACT COMPLIANCE Env-A 1315.01 Testing, Recordkeeping. and Recording for NOx RACT Compliance. (a) Stationary sources subject to this chapter shall comply with the testing requirements specified in Env-A 800. (b) Except when a source is subject to (d) or (e), below, compliance with the NOx RACT emission standards specified in this chapter shall be determined: (1) In accordance with Env-A 803; or (2) By a CEM system for NOx, if a CEM system is require

. d by a permit issued pursuant to Env-A 600 or by Env-A 1315. 02. (c) Except when purchasing NOx allowances pursuant to Env-A 3100, rccordkeeping and reporting shall be in accordance with Env-A 900. (d) The owner or operator of a source subject to Env-A 2900, Multiple Pollutant Annual Budget Trading and Banking Program, shall comply with the testing and monitoring requirements specified in EnvA 800 and in Env-A 2900 and the recordkeeping and reporting requirements ofEnv-A 900 and Env-A 2900. In the event of a conflict between Env-A 2900 and Env-A 800 or Env-A 900, the requirements of Env-A 2900 shall apply. (e) The owner or operator of a source subject to Env-A 3200, NOx Budget Trading Program, shall comply with the testing and monitoring requirements specified in Env-A 800 and in Env-A 3200 and the recordkeeping and reporting requirements of Env-A 900 and Env-A 3200. In the event of a conflict between Env-A 3200 and Env-A 800 or Env-A 900, the requirements of Env-A 3200 shall apply. Env-A 1315.02 CEM Requirements for NOx. The department shall require installation, operation, maintenance, and quality assurance testing of a CEM system for NOx which meets all applicable requirements specified in Env-A 800 if any of the following conditions exist:2010-81 Adopted effective I0-31- I 0 19 (a) A source uses air pollution control equipment in order to maintain compliance with a NOx emission limit, and continuous emission monitoring is necessary to ensure that the emission limit is not exceeded and that the control equipment is performing correctly; (b) A stationary source is otherwise subject to the CEM provisions ofEnv-A 800; (c) A stationary source or device generates emissions credits for th e purpose of emission averaging pursuant to Env-A 1315 .04; or (d) A stationary source or device uses seasonal emission control techniques, in accordance with Env-A I 3 I 5.06, in order to comply with NOx RACT. Env-A 13 1 5.03 Alternatives to Meeting Specified RACT Emission Limits. (a) Compliance with the NOx RACT emission limits specified in this chapter may be achieved through the purchase of NOx allowances that are converted to and used as discrete emission reductions (DERs) in accordance with Env-A 3 I 00. (b) NOx RACT emission 

### limits other than those specified in Env-A 1303 through Env-A 1313 shall be allowable as an alternative to the specified limits for all NOx emitting processes and devices regulated under this chapter, except for wet-bottom cyclone fired utility boilers subject to the NOx RACT requirements specified in Env-A 1303.05. (c) To obtain alternative NOx RACT emission limits for a source, the owner or operator of the source shall request a NOx RACT order from the department in accordance with Env-A 1316. Env-A 1315.04 Emissions Averaging for Multiple Sources Under Common Ownership. (a) For the purposes of this section, "bubble" means an option taken by the owner of 2 or more stationary sources to use emissions averaging so as to im pose controls that are more · stringent than RACT level on one or more emissions units at one or more of the owner' s stationary sources while simultaneously imposing controls that are less stringent than RACT level on other emissions units at the same or other of the owner's stationary sources, including the option ofno controls on such units, in order to achieve the same overall amount of emission reduction required by the SIP in a more cost effective manner. (b) Emissions averaging shall be allowed for NOx emissions from 2 o r more stationary sources only if all of the requirements of this section are met. (c) All of the stationary sources to be included in the emissions averaging shall be: (I) Located in New Hampshire; and (2) Under the control of a single owner. (d) Emissions averaging, including identifying allowable emission averaging periods, shall be done in accordance with EPA's emissions trading policy, as described at 51 FR 43814 and 5 1 FR 43850. (e) Emission reduction credits generated for the purpose of emission averaging shall: (I) Be real, surplus, permanent, quantifiable, federally-enforceable, and transferable within the bubbl e within a given calendar year; and {2) Conform to 40 CFR 51.165, as revised June 28, 1989, RSA 125-J, Env-A 3000, and Env-A 3 100

. (f) Emissi ons averaging shall be enforced by means of federally-enforceable condition s contained in the permits for the stationary sources issued by the department as a source -specific SIP revision, or by20 I 0-81 Adopted cff cctive I0-3 1- 1 0 20 federally-enforceable permits issued by the department or EPA, for all stationary sources to be included in the averaging. (g) The recordkeeping and reporting requirements for emission averaging shall: (I) Be in accordance with Env-A 900; and (2) Include a summary of the emissions, emissions reduction credit transfers, applicable transfer ratios, and adjusted emissions, after transfer, of each affected stationary source. (h) Each stationary source to be included in the emissions averaging shall calculate the total allowable NOx emissions using the equation specified in Env-A 1315.05 for each 24-hour calendar day. Compliance with the NOx RACT weighted average allowable emission rate so calculated shall be based on the weighted average actual NOx emissions from the emjssions unit(s) that are operating on a given day. (i) Emission reduction credits generated from reductions at any stationary source included in emissions averaging may be used for compliance with the total allowable NOx emissions calculated pursuant to (h), above, by any other stationary source(s) within the bubble. G) The owner or operator of each stationary source to be included in the emissions averaging shall: (I) Calculate daily emissions:
a. For those emjssions units generating credits for the purpose of emissions averaging, based on the installation of CEMs in accordance with Env-A 1315.02; or b. For those emissions units for which CEMs are not required under Env-A 1315.02, based on: l. The worst case emission rate(s) for the device(s) or source(s) established through stack testing performed in accordance with Env-A 800 and approved by EPA; and 2. The hours of operation measured in accordance with a method approved by EPA; and (2) Comply with the recordkeeping and reporting requirements specified in Env-A 900. Env-A 1315.05 Emissions Averaging Equation. (a) "E" means the total allowable emissions from all stationary sources included in the emissions averaging, in pounds per day. (b) "AI, A2,

... , An" means the applicable emission lirrut for each unit ofproduction, such as lb/MMBtu, as specified in this chapter. (c) "B I, B2,

... , Bn" means the maximum number ofunits ofproduction per day, such as MMBtulday, based on the maximum gross heat input rate ofeach emissions unit included in the errussions averaging. (d) To calculate the total allowable emissions from all stationary sources included in the emissions averaging in pounds per day, the owner or operator shall multiply AI times Bl, A2 time B2, and so forth , and then sum the products, as jn the formula below: E =(A 1 x B 1) + (A2 x B2) +
... + (An x Bn) Env-A 1315.06 Seasonal Control of NOx Emissions. (a) A stationary source that is subject to this chapter may use seasonal emission control techniques in order to comply with NOx RACT, as specified in (b) through (f), below. (b) Any stationary source using post-combust ion NOx air pollution control equipment to comply with NOx RACT during the ozone season shall continue to operate said equipment during the remainder of the calendar year.2010-81 Adopted effective 10-31-10 21 (c) The allowable annual NOx mass emission rate, in tons per year, shall be less than or equal to the annual NOx mass emission rate that would be cal culated by multiplying the actual annual production rate, for example Btu per year, by the applicable emission limit, for example lbs

. NOx per million Btu, as specified in Env-A 1303 through Env-A 1313 for all emissions units and fuels in use prior to December 31, 1990. (d) Annual NOx emissions limits shall be based on the lower of the actual or allowable NOx emissions for calendar year 1990, unless NOx emissions and operational data submitted by the owner or operator, and approved by the department in accordance with (e), below, demonstrate that NOx emissi ons from the source for calendar year 1990 are not representative of normal operations. In no case shall NOx emissions data for years prior to calendar year 1989 be used to represent normal operation s for the purpose of emissions averaging. (e) The department shall use EPA-approved methods and procedures as specified in 40 CFR §51.165 for determining whether the NOx and operational data submitted by the owner or operator is adequate to demonstrate that NOx emissions for calendar year 1990 are not r epresentative of normal operations

. (f) Emissions averaging to meet NOx RACT requirements on a seasonal basis shall be allowable in accordance with the following requirements: (I) A 24-hour calendar day average NOx mass emission limit shall be established for the ozone season based on the applicable limit specified in Env-A 1303 through Env-A 1313 for all emissions units and fuels in use prior to December 31, 1992; (2) A 24-hour calendar day average NOx mass emission limit shall be established for the remainder ofthe year based on the uncontrolled emission rate of the emissions unit determined by CEM data or stack test data; (3) An allowable average annual NOx mass emission limit shall be established in accordance with (c), above; (4) The sum of the NOx mass emissions during the ozone season and the NOx mass emissions during the remainder of the calendar year shall be less than or equal to the lesser ofthe annual NOx mass em issions that would have been allowed under Env-A 1303 through Env-A 1313 or the annual NOx mass emissions otherwise allowed under Env-A 611, Env-A 618, Env-A 619, Env-A 1314, Env-A 1 315 .03 , Env-A 1315.04, Env-A 2900 through Env-A 3300, Env-A 3500, Env-A 3700, and Env-A 4300; (5) Emissions from replacement power sour ces shall be calculated by multiplying the actual production rate for the device, for example Btu per hour, by the allowable NOx mass emission rate for the device, for example lb. NOx per million Btu; (6) For multiple sources under common ownership using the bubble specified in Env-A 1315.04, the applicable emission limit for each unit ofproduction referred to in the formula in Env-A 1315.05 shall be established in accordance with the applicable provisions of this part; and (7) All stationary sources using seasonal control s shall:
a. Install CEMs to the extent required by Env-A 1315.02 and Env-A 800; b. Calculate daily emissions in accordance with Env-A 1315.02 and Env-A 800;
c. Calculate annual emissions in accordance with this part ; and d. Comply with the applicable recordkeeping and reporting requirements specified in EnvA 900.20 I 0

-8 1 Adopted effective I 0

-31

- 10 22 PART Env-A 1316 NOx RACT ORDERS Env-A 1316.01 Definiti ons. For the purpose of this part, the following definitions shall apply: (a) "Determination of insufficiency" means a written determination by the department that the documentation submitted by an applicant pursuant to Env

-A 1316.02(a) , is inadequate for the department to issue a NOx RACT order; and (b) "Determination of sufficiency" means a written determinationby the department that the documentation submitted by an applicant pursuant to Env-A 1316.02(a), is adequate for the department to issue a NOx RACT order. Env

-A 1316.02 Requests for NOx RACT Orders: Initial Determinations Regarding Sufficiency. (a) To request a NOx RACT order, the owner or operator of any miscellaneous stationary source subject to the provisions ofEnv-A 1314 or any source, device or process seeking alternative RACT emission limits pursuant to Env-A 1315.03 shall submit the information, including a feasibility study, as specified in Env-A 1316.04 to the department within 120 days of the date when the source becomes subject to this chapter. (b) Within 60 days of receipt of information submitted pursuant to (a), above, the department shall review all information submitted and notify the person requesting the alternative emissions limits (requestor) in writing of its initial determination of sufficiency or ini tial determination ofinsufficiency. (c) If the department makes an initial det ermination ofinsufficiency, the notice sent pursuant to (b), above, shall include: (1) A request for the additional information that is necessary for the department to make a determination of sufficiency; and (2) A statement that if a complete response to the request for additional information is not received by the department within 60 days of the date of the notice sent pursuant to (b) , above, a final determination ofinsufficiency will be made. Env-A 1316.03 Final Determinations Regarding Sufficiency; Proposed NOx RACT Orders. (a) If an initial determination of sufficiency is made, then within 60 days of the initial determination of sufficiency the department shall : (1) Make a final

- determination of sufficiency and present to EPA and the requestor a proposed RACT order that contains the information specified in (c), below; and (2) Proceed as specified in Env-A 1316.05 relative to public notice. (b) If an initial determination ofinsuff iciency is made, then within 60 days of the initial determination ofinsufficiency the department shall: (1) If the requestor files a response within the specified time period which contains information that is sufficient to allow a determination of sufficiency to be made, make a final determination of sufficiency and: a. Present to EPA and the requestor a proposed NOx RACT order that contains the information specified in (c), below; and b. Proceed as specified in Env-A 1316.05 relative to public notice; or (2) If the requestor does not file a response within the specified time period which contains information that is sufficient to allow a determination of sufficiency to be made, terminate the permit process and issue a final determination ofinsufficiency .20 10-81 Adopted effeeli ve 1 0-3 1-10 23
(c) A proposed NOx RACT order issued pursuant to (a)(l) or (b)(1) shall contain the following : (1) An inventory of all NOx-emitting sources, devices, or processes; (2) Emission limits for all NOx-emitting sources, devices, or processes; (3) A schedule requiring compliance with the RACT emission limits that contains the elements described in Env-A 1316.04(g); (4) Procedures for determini ng initial compliance with the emission limits; (5) Procedures for assessing continuous compliance with the emission limits ; and (6) Recordkeeping and reporting requirements in accordance with the provisions of Env-A 900. Env-A 1316.04 Information R equir ed for NOx RACf Order Request. T he information required by Env-A 1316.02(a) shall be as follows: (a) An inventory of all NOx-emitting sources, devices, or processes at the facility; (b) The maximum NOx-emitting capacity of each NOx-emitting source, device, or process; (c) The actual amount of NOx emitted based on heat input, fuel consumption , or equivalent method acceptable to the department, for each day during the previous calendar year, from each affected NOxemitting source, device or process at the facility; (d) A feasibility study of RACT options, comprising: (I) Identif ication of all available NOx control techniques and other opt ions for all applicable NOx emitting sources, devices, or processes for which alternative RACT emission limits are sought, including but not limited to using ERCs orDERs, changing to low-NOx emitting processes, and, for utility boilers, the following:
a. Low-NOx burners; b. Overfire air;
c. Flue gas recirculation; d. Natural gas reburn;
e. Burners out of service; f. Use of alternative fuels; g. Selective catalytic reduction (SCR); and h. Selective non-catalytic reduction (SNCR); and (2) An examination of the technical and econom ical feasibi lity of each opt ion identified; (e) The control option selected, stating emission limits, monitoring, recordkeeping and reporting procedures, an d test methods to demonstrate compliance; (f) The amount of NOx that is proposed to be controlled from each NOx-emitting source, device or process identified in the inventory required by (a), above; and (g) A schedule for implementation, which identifies the commitment dates for the major increments of progress toward compliance, inc luding: (I) Completion of engineering; (2) Submission of air pollution permit application;(3) Awarding of contract; ( 4) Initiation of construction; (5) Completion of construction; (6) Initial compliance testing; (7) Submission of compliance tests reports; and 20l 0-81 Adopted cffectiv e I 0-31-1 0 24

(8) Final compliance with emission or control requirements of this chapter. Env-A 1316.05 Public Notice; Opportunity for Comment. (a) Within 30 days of issuing a proposed NOx RACT order, the department shall cause a public notice of the proposed NOx RACT order to be publi shed once in a newspaper of daily statewide circulation and once in a newspaper in the general locality of the source for which the alternative NOx compliance is being sought. (b) The notice published pursuant to (a), above, shall: (1) Briefly describe the proposed NOx RACf order; (2) Offer the opport unity for a hearing; (3) State where the full proposal is available for inspection, including whether the proposal can be accessed electronicaUy; (4) Identify the name and contact information for the individual at the depmtment to whom a request for a hearing and written comments should be directed; and (5) Specify that comments are due to the department within 30 days of publication of the notice or I0 days after the public hearing, if one is requested. (c) If a public hearing on the proposal is requested , the department shall : (I) At least 30 days prior to conducting the hearing, publish a notice in a newspaper of daily statewide circulation, stating the place, date, and time of the hearing; (2) Conduct the hearing on the proposed NOx RACT orde r as specified in the published notice in accordance with the non-adjudicative hearing procedures specified in Env-C 200; and (3) Accept written comments on the proposal until 10 days after the public hearing. Env-A 1316.06 Issuance of NOx RACT Or der. (a) After considering all public comment received and within 60 days of the date ofthe public hearing on the proposed NOx RACT order, the department shall issue a final NOx RACf order to the owner or operator of the affected source, device, or process. (b) Within 60 days of the issuance of a final NOx RACT order, the department shall submit to EPA a revision to the State Implementation Plan (SIP) to reflect the NOx RACT order. (c) Upon issuance of the final NOx RACT order, the department shall issue a permit to the owner or operator of the affected source, device, or process which incorporates all of the terms and conditions of the final NOx RACT order. (d) The owner or operator of any source, device, or process for which a f inal NOx RACT order has been issued shall comply with all of the terms and conditions ofthe final NOx RACT order immediately upon the issuance of such order by the department20 1 0-8 I Adopted effective 1 0-3 I

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Appendix Rule Scction(s) Federal Statute(s I m lcmented Env-A 1300 RSA 125-C:4, 

### I(a 42 U.S.C. Sections 7410, 7502(c) & 751 lc