Section 326IAC24-2-2. Definitions

   For purposes of this rule, the definition given for a term in this rule shall control in any conflict between 326 IAC 1-2 and this rule. In addition to the definitions provided in IC 13-11-2 and 326 IAC 1-2, the following definitions apply throughout this rule, unless expressly stated otherwise or unless the context clearly implies otherwise:

(1) "Account number" means the identification number given by the U.S. EPA to each CAIR SO₂ allowance tracking system account.

(2) "Acid rain emissions limitation" means a limitation on emissions of sulfur dioxide or nitrogen oxides under the acid rain program.

(3) "Acid rain program" means a multistate sulfur dioxide and nitrogen oxides air pollution control and emission reduction program established by the U.S. EPA under Title IV of the Clean Air Act and 40 CFR 72 through 40 CFR 78*.

(4) "Allocate" or "allocation" means, with regard to CAIR SO₂ allowances issued under the acid rain program, the determination by the U.S. EPA of the amount of such CAIR SO₂ allowances to be initially credited to a CAIR SO₂ unit or other entity and, with regard to CAIR SO₂ allowances issued under provisions of a state implementation plan that are approved under 40 CFR 51.124(o)(1), 40 CFR 51.124(o)(2), or 40 CFR 51.124(r)*, or 40 CFR 97*, the determination by a permitting authority of the amount of SO₂ allowances to be initially credited to a CAIR SO₂ unit or other entity.

(5) "Allowance transfer deadline" means, for a control period, midnight of March 1 (if it is a business day), or midnight of the first business day thereafter (if March 1 is not a business day), immediately following the control period and is the deadline by which a CAIR SO₂ allowance transfer must be submitted for recordation in a CAIR SO₂ source's compliance account in order to be used to meet the source's CAIR SO₂ emissions limitation for such control period in accordance with section 8(j) and 8(k) of this rule.

(6) "Alternate CAIR designated representative" means, for a CAIR SO₂ source and each CAIR SO₂ unit at the source, the natural person who is authorized by the owners and operators of the source and all such units at the source in accordance with sections 6 and 11 of this rule, to act on behalf of the CAIR designated representative in matters pertaining to the CAIR SO₂ trading program. If the CAIR SO₂ source is also a CAIR NO_x source, then this natural person shall be the same person as the alternate CAIR designated representative under the CAIR NO_x annual trading program. If the CAIR SO₂ source is also a CAIR NO_x ozone season source, then this natural person shall be the same person as the alternate CAIR designated representative under the CAIR NO_x ozone season trading program. If the CAIR SO₂ source is also subject to the acid rain program, then this natural person shall be the same person as the alternate designated representative under the acid rain program. If the CAIR SO₂ source is also subject to the mercury budget trading program, then this natural person shall be the same person as the alternate mercury designated representative under the mercury budget trading program.

(7) "Automated data acquisition and handling system" or "DAHS" means that component of the continuous emission monitoring system, or other emissions monitoring system approved for use under section 10 of this rule, designed to interpret and convert individual output signals from pollutant concentration monitors, flow monitors, diluent gas monitors, and other component parts of the monitoring system to produce a continuous record of the measured parameters in the measurement units required by section 10 of this rule.

(8) "Biomass" means any of the following:

(A) Organic material grown for the purpose of being converted to energy.

(B) Organic byproduct of agriculture that can be converted into energy.

(C) Material that:

(i) can be converted into energy and is nonmerchantable for other purposes;

(ii) is segregated from other nonmerchantable material; and

(iii) is:

(AA) a forest-related organic residue, including mill residues, precommercial thinnings, slash, brush, or byproduct from conversion of trees to merchantable material; or

(BB) a wood material, including pallets, crates, dunnage, manufacturing and construction materials (other than pressure-treated, chemically-treated, or painted wood products), and landscape or right-of-way trimmings.

(9) "Boiler" means an enclosed fossil- or other-fuel-fired combustion device used to produce heat and to transfer heat to recirculating water, steam, or other medium.

(10) "Bottoming-cycle cogeneration unit" means a cogeneration unit in which the energy input to the unit is first used to produce useful thermal energy and at least some of the reject heat from the useful thermal energy application or process is then used for electricity production.

(11) "CAIR authorized account representative" means, with regard to a general account, a responsible natural person who is authorized, in accordance with sections 6, 8, and 11 of this rule, to transfer and otherwise dispose of CAIR SO₂ allowances held in the general account and, with regard to a compliance account, the CAIR designated representative of the source.

(12) "CAIR designated representative" means, for a CAIR SO₂ source and each CAIR SO₂ unit at the source, the natural person who is authorized by the owners and operators of the source and all such units at the source, in accordance with sections 6 and 11 of this rule, to represent and legally bind each owner and operator in matters pertaining to the CAIR SO₂ trading program. If the CAIR SO₂ source is also a CAIR NO_x source, then this natural person shall be the same person as the CAIR designated representative under the CAIR NO_x annual trading program. If the CAIR SO₂ source is also a CAIR NO_x ozone season source, then this natural person shall be the same person as the CAIR designated representative under the CAIR NO_x ozone season trading program. If the CAIR SO₂ source is also subject to the acid rain program, then this natural person shall be the same person as the designated representative under the acid rain program. If the CAIR SO₂ source is also subject to the mercury budget trading program, then this natural person shall be the same person as the mercury designated representative under the mercury budget trading program.

(13) "CAIR NO_x annual trading program" means a multistate nitrogen oxides air pollution control and emission reduction program approved and administered by the U.S. EPA in accordance with 326 IAC 24-1; 40 CFR 96, Subparts AA through II* and 40 CFR 51.123(o)(1) or 40 CFR 51.123(o)(2)*; or established by the U.S. EPA in accordance with 40 CFR 97, Subparts AA through II* and 40 CFR 51.123(p)* and 40 CFR 52.35*, as a means of mitigating interstate transport of fine particulates and nitrogen oxides.

(14) "CAIR NO_x ozone season source" means a source that is subject to the CAIR NO_x ozone season trading program.

(15) "CAIR NO_x ozone season trading program" means a multistate nitrogen oxides air pollution control and emission reduction program approved and administered by the U.S. EPA in accordance with 326 IAC 24-3; 40 CFR 96, Subparts AAAA through IIII* and 40 CFR 51.123(aa)(1) or 40 CFR 51.123(aa)(2), and 40 CFR 51.123(bb)(1), 40 CFR 51.123(bb)(2), or 40 CFR 51.123(dd)*; or established by the U.S. EPA in accordance with 40 CFR 97, Subparts AAAA through IIII* and 40 CFR 51.123(ee)* and 40 CFR 52.35*, as a means of mitigating interstate transport of ozone and nitrogen oxides.

(16) "CAIR NO_x source" means a source that is subject to the CAIR NO_x annual trading program.

(17) "CAIR permit" means the legally binding and federally enforceable written document, or portion of such document, issued by the department under section 7 of this rule, including any permit revisions, specifying the CAIR SO₂ trading program requirements applicable to a CAIR SO₂ source, to each CAIR SO₂ unit at the source, and to the owners and operators and the CAIR designated representative of the source and each such unit.

(18) "CAIR SO₂ allowance" means a limited authorization issued by the U.S. EPA under the acid rain program, or by a permitting authority under provisions of a state implementation plan that are approved under 40 CFR 51.124(o)(1), 40 CFR 51.124(o)(2), or 40 CFR 51.124(r)*, or under 40 CFR 97*, to emit sulfur dioxide during the control period of the specified calendar year for which the authorization is allocated or of any calendar year thereafter under the CAIR SO₂ trading program as follows:

(A) For one (1) CAIR SO₂ allowance allocated for a control period in a year before 2010, one (1) ton of sulfur dioxide, except as provided in section 11(k) of this rule.

(B) For one (1) CAIR SO₂ allowance allocated for a control period in 2010 through 2014, fifty-hundredths (0.50) ton of sulfur dioxide, except as provided in section 11(k) of this rule.

(C) For one (1) CAIR SO₂ allowance allocated for a control period in 2015 or later, thirty-five hundredths (0.35) ton of sulfur dioxide, except as provided in section 11(k) of this rule.

(D) An authorization to emit sulfur dioxide that is not issued under the acid rain program, provisions of a state implementation plan that are approved under 40 CFR 51.124(o)(1), 40 CFR 51.124(o)(2), or 40 CFR 51.124(r)*, or under 40 CFR 97*, shall not be a CAIR SO₂ allowance.

(19) "CAIR SO₂ allowance deduction" or "deduct CAIR SO₂ allowances" means the permanent withdrawal of CAIR SO₂ allowances by the U.S. EPA from a compliance account, for example, in order to account for a specified number of tons of total sulfur dioxide emissions from all CAIR SO₂ units at a CAIR SO₂ source for a control period, determined in accordance with section 10 of this rule, or to account for excess emissions.

(20) "CAIR SO₂ allowances held" or "hold CAIR SO₂ allowances" means the CAIR SO₂ allowances recorded by the U.S. EPA, or submitted to the U.S. EPA for recordation, in accordance with sections 8, 9, and 11 of this rule or 40 CFR 73*, in a CAIR SO₂ allowance tracking system account.

(21) "CAIR SO₂ allowance tracking system" means the system by which the U.S. EPA records allocations, deductions, and transfers of CAIR SO₂ allowances under the CAIR SO₂ trading program. This is the same system as the allowance tracking system under 40 CFR 72.2* by which the U.S. EPA records allocations, deduction, and transfers of acid rain SO₂ allowances under the acid rain program.

(22) "CAIR SO₂ allowance tracking system account" means an account in the CAIR SO₂ allowance tracking system established by the U.S. EPA for purposes of recording the allocation, holding, transferring, or deducting of CAIR SO₂ allowances. Such allowances will be allocated, held, deducted, or transferred only as whole allowances.

(23) "CAIR SO₂ emissions limitation" means, for a CAIR SO₂ source, the tonnage equivalent, in SO₂ emissions in a control period, of the CAIR SO₂ allowances available for deduction for the source under section 8(j) and 8(k) of this rule for the control period.

(24) "CAIR SO₂ source" means a source that includes one (1) or more CAIR SO₂ units.

(25) "CAIR SO₂ trading program" means a multistate sulfur dioxide air pollution control and emission reduction program approved and administered by the U.S. EPA in accordance with this rule; 40 CFR 96, Subparts AAA through III* and 40 CFR 51.124(o)(1) or 40 CFR 51.124(o)(2)*; or established by the U.S. EPA in accordance with 40 CFR 97, Subparts AAA through III* and 40 CFR 51.124(r)* and 40 CFR 52.36*, as a means of mitigating interstate transport of fine particulates and sulfur dioxide.

(26) "CAIR SO₂ unit" means a unit that is subject to the CAIR SO₂ trading program under section 1 of this rule and, except for purposes of section 3 of this rule, a CAIR SO₂ opt-in unit under section 11 of this rule.

(27) "Coal" means any solid fuel classified as anthracite, bituminous, subbituminous, or lignite.

(28) "Coal-derived fuel" means any fuel, whether in a solid, liquid, or gaseous state, produced by the mechanical, thermal, or chemical processing of coal.

(29) "Coal-fired" means combusting any amount of coal or coal-derived fuel, alone, or in combination with any amount of any other fuel.

(30) "Cogeneration unit" means a stationary, fossil-fuel-fired boiler or stationary, fossil-fuel-fired combustion turbine:

(A) having equipment used to produce electricity and useful thermal energy for industrial, commercial, heating, or cooling purposes through the sequential use of energy;

(B) producing during the twelve (12) month period starting on the date the unit first produces electricity and during any calendar year after the calendar in which the unit first produces electricity:

(i) for a topping-cycle cogeneration unit:

(AA) useful thermal energy not less than five percent (5%) of total energy output; and

(BB) useful power that, when added to one-half (½) of useful thermal energy produced, is not less than forty-two and one-half percent (42.5%) of total energy input, if useful thermal energy produced is fifteen percent (15%) or more of total energy output, or not less than forty-five percent (45%) of total energy input, if useful thermal energy produced is less than fifteen percent (15%) of total energy output; and

(ii) for a bottoming-cycle cogeneration unit, useful power not less than forty-five percent (45%) of total energy input; and

(C) provided that the total energy input under clause (B)(i)(BB) and (B)(ii) shall equal the unit's total energy input from all fuel except biomass if the unit is a boiler.

(31) "Combustion turbine" means:

(A) an enclosed device comprising a compressor, a combustor, and a turbine and in which the flue gas resulting from the combustion of fuel in the combustor passes through the turbine, rotating the turbine; and

(B) if the enclosed device under clause (A) is combined cycle, any associated duct burner, heat recovery steam generator and steam turbine.

(32) "Commence commercial operation" means, with regard to a unit, the following:

(A) To have begun to produce steam, gas, or other heated medium used to generate electricity for sale or use, including test generation, except as provided in sections 3 and 11(f)(10) of this rule, subject to the following:

(i) For a unit that is a CAIR SO₂ unit under section 1 of this rule on the later of November 15, 1990, or the date the unit commences commercial operation as defined in this clause and that subsequently undergoes a physical change, other than replacement of the unit by a unit at the same source, such date shall remain the date of commencement of commercial operation of the unit, which shall continue to be treated as the same unit.

(ii) For a unit that is a CAIR SO₂ unit under section 1 of this rule on the later of November 15, 1990, or the date the unit commences commercial operation as defined in this clause and that is subsequently replaced by a unit at the same source (for example, repowered), such date shall remain the replaced unit's date of commencement of commercial operation, and the replacement unit shall be treated as a separate unit with a separate date for commencement of commercial operation as defined in this clause or clause (B) as appropriate.

(B) Notwithstanding clause (A) and except as provided in section 3 of this rule, for a unit that is not a CAIR SO₂ unit under section 1 of this rule on the later of November 15, 1990, or date the unit commences commercial operation as defined in clause (A), the unit's date for commencement of commercial operation shall be the date on which the unit becomes a CAIR SO₂ unit under section 1 of this rule, subject to the following:

(i) For a unit with a date for commencement of commercial operation as defined in this clause and that subsequently undergoes a physical change (other than replacement of the unit by a unit at the same source) such date shall remain the date of commencement of commercial operation, which shall continue to be treated as the same unit.

(ii) For a unit with a date for commencement of commercial operation as defined in this clause and that is subsequently replaced by a unit at the same source (for example, repowered), such date shall remain the replaced unit's date of commencement of commercial operation, and the replacement unit shall be treated as a separate unit with a separate date for commencement of commercial operation as defined in this clause, or clause (B), as appropriate.

(33) "Commence operation" means the following:

(A) To have begun any mechanical, chemical, or electronic process, including, with regard to a unit, start-up of a unit's combustion chamber, except as provided in section 11(f)(10) of this rule.

(B) For a unit that undergoes a physical change (other than replacement of the unit by a unit at the same source) after the date the unit commences operation as defined in clause (A), such date shall remain the date of commencement of operation of the unit, which shall continue to be treated as the same unit.

(C) For a unit that is replaced by a unit at the same source (for example, repowered) after the date the unit commences operation as defined in clause (A), such date shall remain the replaced unit's date of commencement, and the replacement unit shall be treated as a separate unit with a separate date for commencement of operation as defined in this clause or clause (A) or (B), as appropriate, except as provided in section 11(f)(10) of this rule.

(34) "Common stack means" a single flue through which emissions from two (2) or more units are exhausted.

(35) "Compliance account" means a CAIR SO₂ allowance tracking system account, established by the U.S. EPA for a CAIR SO₂ source subject to an acid rain emissions limitations under 40 CFR 73.31(a)* or 40 CFR 73.31(b)* or for any other CAIR SO₂ source under section 8 or 11 of this rule, in which any CAIR SO₂ allowance allocations for the CAIR SO₂ units at the source are initially recorded and in which are held any CAIR SO₂ allowances available for use for a control period in order to meet the source's CAIR SO₂ emissions limitation in accordance with section 8(j) and 8(k) of this rule.

(36) "Continuous emission monitoring system" or "CEMS" means the equipment required under section 10 of this rule to sample, analyze, measure, and provide, by means of readings recorded at least once every fifteen (15) minutes, using an automated data acquisition and handling system (DAHS), a permanent record of sulfur dioxide emissions, stack gas volumetric flow rate, stack gas moisture content, and oxygen or carbon dioxide concentration, as applicable, in a manner consistent with 40 CFR 75*. The following systems are the principal types of continuous emission monitoring systems required under section 10 of this rule:

(A) a flow monitoring system, consisting of a stack flow rate monitor and an automated data acquisition and handling system and providing a permanent, continuous record of stack gas volumetric flow rate, in standard cubic feet per hour (scfh);

(B) a sulfur dioxide monitoring system, consisting of a SO₂ pollutant concentration monitor and an automated data acquisition and handling system and providing a permanent, continuous record of SO₂ emissions, in parts per million (ppm);

(C) a moisture monitoring system, as defined in 40 CFR 75.11(b)(2)* and providing a permanent, continuous record of the stack gas moisture content, in percent H₂O;

(D) a carbon dioxide monitoring system, consisting of a CO₂ pollutant concentration monitor, or an oxygen monitor plus suitable mathematical equations from which the CO₂ concentration is derived, and an automated data acquisition and handling system and providing a permanent, continuous record of CO₂ emissions, in percent CO₂; and

(E) an oxygen monitoring system, consisting of an O₂ concentration monitor and an automated data acquisition and handling system and providing a permanent, continuous record of O₂, in percent O₂.

(37) "Control period" means the period beginning January 1 of a calendar year, except as provided in section 4(c)(2) of this rule, and ending on December 31 of the same year, inclusive.

(38) "Emissions" means air pollutants exhausted from a unit or source into the atmosphere, as measured, recorded, and reported to the U.S. EPA by the CAIR designated representative and as determined by the U.S. EPA in accordance with section 10 of this rule.

(39) "Excess emissions" means any ton, or portion of a ton, of sulfur dioxide emitted by the CAIR SO₂ units at a CAIR SO₂ source during a control period that exceeds the CAIR SO₂ emissions limitation for the source, provided that any portion of a ton of excess emissions shall be treated as one (1) ton of excess emissions.

(40) "Fossil fuel" means natural gas, petroleum, coal, or any form of solid, liquid, or gaseous fuel derived from such material.

(41) "Fossil-fuel-fired" means, with regard to a unit, combusting any amount of fossil fuel in any calendar year.

(42) "General account" means a CAIR SO₂ allowance tracking system account, established under section 8 of this rule, that is not a compliance account.

(43) "Generator" means a device that produces electricity.

(44) "Heat input" means, with regard to a specified period of time, the product, in million British thermal units per unit of time (MMBtu/time) of the gross calorific value of the fuel, in British thermal units per pound (Btu/lb), divided by one million (1,000,000) British thermal units per million British thermal units (Btu/MMBtu) and multiplied by the fuel feed rate into a combustion device, in pounds of fuel per unit of time (lb of fuel/time), as measured, recorded, and reported to the U.S. EPA by the CAIR designated representative and determined by the U.S. EPA in accordance with section 10 of this rule and excluding the heat derived from preheated combustion air, recirculated flue gases, or exhaust from other sources.

(45) "Heat input rate" means the amount of heat input, in million British thermal units (MMBtu), divided by unit operating time, in hours, or, with regard to a specific fuel, the amount of heat input attributed to the fuel, in million British thermal units (MMBtu), divided by the unit operating time, in hours, during which the unit combusts the fuel.

(46) "Life-of-the-unit, firm power contractual arrangement" means a unit participation power sales agreement under which a utility or industrial customer reserves, or is entitled to receive, a specified amount or percentage of nameplate capacity and associated energy generated by any specified unit and pays its proportional amount of such unit's total costs, pursuant to a contract:

(A) for the life of the unit;

(B) for a cumulative term of no less than thirty (30) years, including contracts that permit an election for early termination; or

(C) for a period no less than twenty-five (25) years or seventy percent (70%) of the economic useful life of the unit determined as of the time the unit is built, with option rights to purchase or release some portion of the nameplate capacity and associated energy generated by the unit at the end of the period.

(47) "Maximum design heat input" means the maximum amount of fuel per hour, in British thermal units per hour (Btu/hr), that a unit is capable of combusting on a steady state basis as of the initial installation of the unit as specified by the manufacturer of the unit.

(48) "Mercury budget trading program" means a multistate mercury air pollution control and emission reduction program approved and administered by the U.S. EPA in accordance with 40 CFR 60, Subpart HHHH* and 40 CFR 60.24(h)(6)*, or established by the U.S. EPA under the Clean Air Act, Section 111, as a means of reducing national mercury emissions.

(49) "Monitoring system" means any monitoring system that meets the requirements of section 10 of this rule, including a continuous emissions monitoring system, an alternative monitoring system, or an excepted monitoring system under 40 CFR 75*.

(50) "Most stringent state or federal SO₂ emissions limitation" means, with regard to a unit, the lowest SO₂ emissions limitation, in terms of pounds per million British thermal units (lb/MMBtu), that is applicable to the unit under state or federal law, regardless of the averaging period to which the emissions limitation applies.

(51) "Nameplate capacity" means, starting from the initial installation of a generator, the maximum electrical generating output, in megawatt electrical (MWe), that the generator is capable of producing on a steady state basis and during continuous operation (when not restricted by seasonal or other deratings) as of such installation as specified by the manufacturer of the generator or, starting from the completion of any subsequent physical change in the generator resulting in an increase in the maximum electrical generating output, in megawatt electrical (MWe), that the generator is capable of producing on a steady state basis and during continuous operation (when not restricted by seasonal or other deratings) such increased maximum amount as of such completion as specified by the person conducting the physical change.

(52) "Operator" means any person who operates, controls, or supervises a CAIR SO₂ unit or a CAIR SO₂ source and shall include, but not be limited to, any holding company, utility system, or plant manager of such a unit or source.

(53) "Owner" means any of the following persons:

(A) With regard to a CAIR SO₂ source or a CAIR SO₂ unit at a source, respectively, any of the following:

(i) Holder of any portion of the legal or equitable title in a CAIR SO₂ unit at the source or the CAIR SO₂ unit.

(ii) Holder of a leasehold interest in a CAIR SO₂ unit at the source or the CAIR SO₂ unit.

(iii) Purchaser of power from a CAIR SO₂ unit at the source or the CAIR SO₂ unit under a life-of-the-unit, firm power contractual arrangement; provided that, unless expressly provided for in a leasehold agreement, owner shall not include a passive lessor, or a person who has an equitable interest through such lessor, whose rental payments are not based, either directly or indirectly, on the revenues or income from such CAIR SO₂ unit.

(B) With regard to any general account, any person who has an ownership interest with respect to the CAIR SO₂ allowances held in the general account and who is subject to the binding agreement for the CAIR authorized account representative to represent the person's ownership interest with respect to CAIR SO₂ allowances.

(54) "Permitting authority" means the state air pollution control agency, local agency, other state agency, or other agency authorized by the U.S. EPA to issue or revise permits to meet the requirements of the CAIR NO_x annual trading program or, if no such agency has been so authorized, the U.S. EPA.

(55) "Potential electrical output capacity" means thirty-three percent (33%) of a unit's maximum design heat input, divided by three thousand four hundred thirteen (3,413) Btu/kilowatt hour, divided by one thousand (1,000) kilowatt hour/megawatt hour, and multiplied by eight thousand seven hundred sixty (8,760) hours/year.

(56) "Receive" or "receipt of" means, when referring to the department or the U.S. EPA, to come into possession of a document, information, or correspondence, whether sent in hard copy or by authorized electronic transmission, as indicated in an official log, or by a notation made on the document, information, or correspondence, by the department or the U.S. EPA in the regular course of business.

(57) "Recordation", "record", or "recorded" means, with regard to CAIR SO₂ allowances, the movement of CAIR SO₂ allowances by the U.S. EPA into or between CAIR SO₂ allowance tracking system accounts, for purposes of allocation, transfer, or deduction.

(58) "Reference method" means any direct test method of sampling and analyzing for an air pollutant as specified in 40 CFR 75.22*.

(59) "Replacement", "replace", or "replaced" means, with regard to a unit, the demolishing of a unit, or the permanent shutdown and permanent disabling of a unit, and the construction of another unit (the replacement unit) to be used instead of the demolished or shutdown unit (the replaced unit).

(60) "Repowered" means, with regard to a unit, replacement of a coal-fired boiler with one (1) of the following coal-fired technologies at the same source as the coal-fired boiler:

(A) atmospheric or pressurized fluidized bed combustion;

(B) integrated gasification combined cycle;

(C) magnetohydrodynamics;

(D) direct and indirect coal-fired turbines;

(E) integrated gasification fuel cells; or

(F) as determined by the U.S. EPA in consultation with the Secretary of Energy, a derivative of one (1) or more of the technologies under clauses (A) through (E) and any other coal-fired technology capable of controlling multiple combustion emissions simultaneously with improved boiler or generation efficiency and with significantly greater waste reduction relative to the performance of technology in widespread commercial use as of January 1, 2005.

(61) "Sequential use of energy" means:

(A) for a topping-cycle cogeneration unit, the use of reject heat from electricity production in a useful thermal energy application or process; or

(B) for a bottoming-cycle cogeneration unit, the use of reject heat from useful thermal energy application or process in electricity production.

(62) "Serial number" means, for a CAIR SO₂ allowance, the unique identification number assigned to each CAIR SO₂ allowance by the U.S. EPA.

(63) "Solid waste incineration unit" means a stationary, fossil-fuel-fired boiler or stationary, fossil-fuel-fired combustion turbine that is a solid waste incineration units as defined in the Clean Air Act, Section 129(g)(1).

(64) "Source" means all buildings, structures, or installations located in one (1) or more contiguous or adjacent properties under common control of the same person or persons. For purposes of Section 502(c) of the Clean Air Act, a source, including a source with multiple units, shall be considered a single facility.

(65) "Submit" or "serve" means to send or transmit a document, information, or correspondence to the person specified in accordance with the applicable rule:

(A) in person;

(B) by United States Postal Service; or

(C) by other means of dispatch or transmission and delivery.

Compliance with any submission or service deadline shall be determined by the date of dispatch, transmission, or mailing and not the date of receipt by the department or U.S. EPA.

(66) "Title V operating permit" or "Part 70 operating permit" means a permit issued under 326 IAC 2-7.

(67) "Title V operating permit regulations" means the rules under 326 IAC 2-7.

(68) "Ton" means two thousand (2,000) pounds. For the purpose of determining compliance with the CAIR SO₂ emissions limitation, total tons of sulfur dioxide emissions for a control period shall be calculated as the sum of all recorded hourly emissions, or the mass equivalent of the recorded hourly emission rates, in accordance with section 10 of this rule, but with any remaining fraction of a ton equal to or greater than fifty-hundredths (0.50) tons deemed to equal one (1) ton and any remaining fraction of a ton less than fifty-hundredths (0.50) tons deemed to equal zero (0) tons.

(69) "Topping-cycle cogeneration unit" means a cogeneration unit in which the energy input to the unit is first used to produce useful power, including electricity, and at least some of the reject heat from the electricity production is then used to provide useful thermal energy.

(70) "Total energy input" means, with regard to a cogeneration unit, total energy of all forms supplied to the cogeneration unit, excluding energy produced by the cogeneration unit itself. Each form of energy supplied shall be measured by the lower heating value of that form of energy calculated as follows:

LHV = HHV - 10.55(W + 9H)

Where:	LHV	=	Lower heating value of fuel in Btu/hr.
	HHV	=	Higher heating value of fuel in Btu/hr.
	W	=	Weight % of moisture in fuel.
	H	=	Weight % of hydrogen in fuel.

(71) "Total energy output" means, with regard to a cogeneration unit, the sum of useful power and useful thermal energy produced by the cogeneration unit.

(72) "Unit" means a stationary, fossil-fuel-fired boiler or combustion turbine or other stationary, fossil-fuel-fired combustion device.

(73) "Unit operating day" means a calendar day in which a unit combusts any fuel.

(74) "Unit operating hour" or "hour of unit operation" means an hour in which a unit combusts any fuel.

(75) "Useful power" means, with regard to a cogeneration unit, electricity or mechanical energy made available for use, excluding any such energy used in the power production process, which process includes, but is not limited to, any on-site processing or treatment of fuel combusted at the unit and any on-site emission controls.

(76) "Useful thermal energy" means, with regard to a cogeneration unit, thermal energy that is:

(A) made available to an industrial or commercial process, not a power production process, excluding any heat contained in condensate return or makeup water;

(B) used in a heating application (for example, space heating or domestic hot water heating); or

(C) used in a space cooling application (that is, thermal energy used by an absorption chiller).

(77) "Utility power distribution system" means the portion of an electricity grid owned or operated by a utility and dedicated to delivering electricity to customers.

  *These documents are incorporated by reference. Copies may be obtained from the Government Printing Office, 732 North Capitol Street NW, Washington, D.C. 20401 or 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. (Air Pollution Control Division; 326 IAC 24-2-2; filed Jan 26, 2007, 10:25 a.m.: 20070221-IR-326050117FRA; errata filed Jan 29, 2007, 2:43 p.m.: 20070221-IR-326050117ACA; filed May 12, 2009, 11:16 a.m.: 20090610-IR-326080005FRA)