Indiana Administrative Code
Title 326 - AIR POLLUTION CONTROL DIVISION
Article 10 - NITROGEN OXIDES RULES
Rule 1 - Nitrogen Oxides Control in Clark and Floyd Counties
Section 1-2 - Definitions

(1) "Actual emissions" means a facility's actual emissions for the baseline year.

(2) "Affected facility" means any facility described in section 1(a)(2) or 1(a)(3) of this rule.

(3) "Affected source" means any source described in section 1(a)(1) of this rule.

(4) "Baseline year" means the most recent year prior to the effective date of this rule for which available data is complete, accurate, and representative of normal operations.

(5) "Clinker" means a product produced in a portland cement kiln which is then proportioned with additives and ground into a fine powder called portland cement.

(6) "Coal" means all solid fuels classified as anthracite, bituminous, sub-bituminous, or lignite by the American Society of Testing and Materials (ASTM) Designation D 388-95*.

(7) "Coal fired steam generating unit" means a facility that, for the purpose of fuel switching in this rule, derived ninety percent (90%) or more of its total heat from combustion of coal in the baseline year.

(8) "Distillate oil" means fuel oil that contains five-hundredths (0.05) weight percent or less nitrogen and complies with the specifications for fuel oil number 1 or 2 as defined by ASTM D 396-92*, Standard Specifications for Fuel Oil.

(9) "Dry bottom boiler" means a boiler that has a furnace bottom temperature below the ash melting point and from which the bottom ash is removed as a solid.

(10) "Facility" is defined at 326 IAC 1-2-27.

(11) "Federally enforceable" is defined at 326 IAC 1-2-28.5.

(12) "Gaseous fuels" means natural gas.

(13) "Industrial, commercial, institutional steam generating unit" means a device that combusts one (1) or more of a combination of coal, oil, and gas and produces steam or hot water primarily to supply power, heat, or hot water to any industrial, commercial, or institutional operation, including boilers used by electric utilities that are not utility boilers.

(14) "Natural gas" means a naturally occurring mixture of hydrocarbon and non-hydrocarbon gases found in geologic formations beneath the earth's surface, of which the principal constituent is methane.

(15) "Nitrogen oxides" or "NOx" means all oxides of nitrogen including, but not limited to, nitrogen oxide and nitrogen dioxide, but excluding nitrous oxide, collectively expressed as nitrogen dioxide.

(16) "Oil" means crude oil or petroleum, or liquid fuel derived from crude oil or petroleum, including distillate oil and residual oil.

(17) "Oil fired steam generating unit" means a facility that, for the purpose of fuel switching in this rule, derived ninety percent (90%) or more of its total heat from combustion of oil in the baseline year.

(18) "Operating day" means a twenty-four (24) hour period between midnight (12 p.m.) and the following midnight during which any facility combusts fuel or produces intermediate or final products. It is not necessary for the facility to operate continuously for the entire twenty-four (24) hour period.

(19) "Overfeed stoker" means a boiler design that employs a moving grate assembly where the coal is fed into a hopper and then onto a continuous grate that conveys the coal into the furnace. As coal moves through the furnace, it passes over several air zones for staged burning.

(20) "Owner or operator" means any person who owns, leases, controls, operates, or supervises any source subject to this rule.

(21) "Portland cement dry preheat process kiln" means a reaction vessel that receives dried raw material from a preheater and calcines and sinters the dried raw material into a product called cement clinker.

(22) "Portland cement long dry kiln" means a reactive vessel that dries, calcines, and sinters raw materials into a product called portland cement clinker.

(23) "Portland cement plant" means any facility that manufactures portland cement by either the wet or dry process.

(24) "Potential emissions" means a facility's potential emissions as defined in 326 IAC 1-2-55 for the baseline year.

(25) "Residual oil" means crude oil and fuel oil that do not comply with the specifications under the definition of distillate oil and all fuel oil numbers 3, 4, and 6 as defined by ASTM D 396-92*, Standard Specifications for Fuel Oils.

(26) "Source" is defined at 326 IAC 1-2-73.

(27) "Spreader stoker" means a boiler design where mechanical or pneumatic feeders distribute coal uniformly over the surface of a moving grate.

(28) "Tangentially fired boiler" means a boiler that has coal and air nozzles mounted in each corner of the furnace where the vertical furnace walls meet. Both pulverized coal and air are directed from the furnace corners along a line tangential to a circle lying in a horizontal plane of the furnace.

(29) "Thirty (30) day rolling average" means an emission rate calculated each operating day by averaging all the preceding thirty (30) successive operating days average emission rates.

(30) "Utility steam generating unit" means any facility that is constructed for the purpose of supplying more than one-third (1/3) of its potential electric output capacity and more than twenty-five (25) megawatts of electric output to any utility power distribution system for sale. Any steam supplied to a steam distribution system for the purpose of providing steam to a steam-electric generator that would produce electric energy for sale is also considered in determining the electric energy output capacity of the affected facility.

(31) "Wall-fired boiler" means a boiler that has pulverized coal burners arranged on the wall of the furnace. The burners have discrete, individual flames that extend perpendicularly into the furnace area.

(32) "Wet bottom" means a boiler that has a furnace bottom temperature above the ash melting point and from which the bottom ash is removed as a liquid.

*These documents are incorporated by reference. Copies are available for review and copying at the Indiana Department of Environmental Management, Office of Air Quality, Indiana Government Center-North, Tenth Floor, 100 North Senate Avenue, Indianapolis, Indiana 46204.