SAN DIEGO COUNTY AIR POLLUTION CONTROL DISTRICT

RULE 260.41a - DEFINITIONS

As used in this subpart, all terms not defined herein shall have the meaning given them in the Act and in Subpart A of this Regulation.

(a) "Steam Generating Unit" means any furnace, boiler, or other device used for combusting fuel for the purpose of producing steam (including fossil fuel-fired steam generators associated with combined cycle gas turbines; nuclear steam generators are not included).

(b) "Electric Utility Steam Generating Unit" means any steam electric generating unit that is constructed for the purpose of supplying more than one-third of its potential electric output capacity and more than 25 MW electrical 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 electrical energy for sale is also considered in determining the electrical energy output capacity of the affected facility.

(c) "Fossil Fuel" means natural gas, petroleum, coal, and any form of solid, liquid, or gaseous fuel derived from such material for the purpose of creating useful heat.

(d) "Subbituminous Coal" means coal that is classified as subbituminous A, B, or C according to the American Society of Testing and Materials' (ASTM) Standard Specification for Classification of Coals by Rank D388-66.

(e) "Lignite" means coal that is classified as lignite A or B according to the American Society of Testing and Materials' (ASTM) Standard Specification for Classification of Coals by Rank D388-66.

(f) "Coal Refuse" means waste products of coal mining, physical coal cleaning, and coal preparation operations (e.g., culm, gob, etc.) containing coal matrix material, clay, and other organic and inorganic material.

(g) "Potential Combustion Concentration" means the theoretical emissions (ng/J, lb/million Btu heat input) that would result from combustion of a fuel in an uncleaned state without emission control systems, and

  1. For particulate matter is:

    (i) 3,000 ng/J (7.0 lb/million Btu) heat input for solid fuel; and

    (ii) 75 ng/J (0.17 lb/million Btu) heat input for liquid fuels.

  2. For sulfur dioxide is determined under Subsection 60.48a(b) of Part 60, Chapter I, Title 40, Code of Federal Regulations, Section 60.48a.
  3. For nitrogen oxides is:

    (i) 290 ng/J (0.67 lb/million Btu) heat input for gaseous fuels;

    (ii) 310 ng/J (0.72 lb/million Btu) heat input for liquid fuels; and

    (iii) 990 ng/J (2.30 lb/million Btu) heat input for solid fuels.

(h) "Combined Cycle Gas Turbine" means a stationary turbine combustion system where heat from the turbine exhaust gases is recovered by a steam generating unit.

(i) "Interconncected" means that two or more electric generating units are electrically tied together by a network of power transmission lines, and other power transmission equipment.

(j) "Electric Utility Company" means the largest interconnected organization, business, or governmental entity that generates electric power for sale (e.g., a holding company with operating subsidiary companies).

(k) "Principal Company" means the electric utility company or companies which own the affected facility.

(l) "Neighboring Company" means any one of those electric utility companies with one or more electric power interconnections to the principal company and which have geographically adjoining service areas.

(m) "Net System Capacity" means the sum of the net electric generating capability (not necessarily equal to rated capacity) of all electric generating equipment owned by an electric utility company (including steam generating units, internal combustion engines, gas turbines, nuclear units, hydroelectric units, and all other electric generating equipment) plus firm contractual purchases that are interconnected to the affected facility that has the malfunctioning flue gas desulfurization system. The electric generating capability of equipment under multiple ownership is prorated based on ownership unless the proportional entitlement to electric output is otherwise established by contractual arrangement.

(n) "System Load" means the entire electric demand of an electric utility company's service area interconnected with the affected facility that has the malfunctioning flue gas desulfurization system plus firm contractual sales to other electric utility companies. Sales to other electric utility companies (e.g., emergency power) not on a firm contractual basis may also be included in the system load when no available system capacity exists in the electric utility company to which the power is supplied for sale.

(o) "System Emergency Reserve" means an amount of electric generating capacity equivalent to the rated capacity of the single largest electric generating unit in the electric utility company (including steam generating units, internal combustion engines, gas turbines, nuclear units, hydroelectric units, and all other electric generating equipment) which is interconnected with the affected facility that has the malfunctioning flue gas desulfurization system. The electric generating capability of equipment under multiple ownership is prorated based on ownership unless the proportional entitlement to electric output is otherwise established by contractual arrangement.

(p) "Available System Capacity" means the capacity determined by subtracting the system load and the system emergency reserves from the net system capacity.

(q) "Spinning Reserve" means the sum of the unutilized net generating capability of all units of the electric utility company that are synchronized to the power distribution system and that are capable of immediately accepting additional load. The electric generating capability of equipment under multiple ownership is prorated based on ownership unless the proportional entitlement to electric output is otherwise established by contractual arrangement.

(r) "Available Purchase Power" means the lesser of the following:

  1. The sum of available system capacity in all neighboring companies.
  2. The sum of the rated capacities of the power interconnection devices between the principal company and all neighboring companies, minus the sum of the electric power load on these interconnections.
  3. The rated capacity of the power transmission lines between the power interconnection devices and the electric generating units (the unit in the principal company that has the malfunctioning flue gas desulfurization system and the unit(s) in the neighboring company supplying replacement electrical power) less the electric power load on these transmission lines.

(s) "Spare Flue Gas Desulfurization System Module" means a separate system of sulfur dioxide emission control equipment capable of treating an amount of flue gas equal to the total amount of flue gas generated by an affected facility when operated at maximum capacity divided by the total number of non-spare flue gas desulfurization modules in the system.

(t) "Emergency Condition" means that period of time when:

  1. The electric generation output of an affected facility with a malfunctioning flue gas desulfurization system cannot be reduced or electrical output must be increased because:

    (i) All available system capacity in the principal company interconnected with the affected facility is being operated, and

    (ii) All available purchase power interconnected with the affected facility is being obtained, or

  2. The electric generation demand is being shifted as quickly as possible from an affected facility with a malfunctioning flue gas desulfurization system to one or more electrical generating units held in reserve by the principal company or by a neighboring company, or
  3. An affected facility with a malfunctioning flue gas desulfurization system becomes the only available unit to maintain a part or all of the principal company's system emergency reserves and the unit is operated in spinning reserve at the lowest practical electric generation load consistent with not causing significant physical damage to the unit. If the unit is operated at a higher load to meet load demand, an emergency condition would not exist unless the conditions under (a) of this definition apply.

(u) "Electric Utility Combined Cycle Gas Turbine" means any combined cycle gas turbine used for electric generation that is constructed for the purpose of supplying more than one-third of its potential electric output capacity and more than 25 MW electrical output to any utility power distribution system for sale. Any steam distribution system that is constructed for the purpose of providing steam to a steam electric generator that would produce electrical power for sale is also considered in determining the electrical energy output capacity of the affected facility.

(v) "Potential Electrical Output Capacity" is defined as 33 percent of the maximum design heat input capacity of the steam generating unit (e.g., a steam generating unit with a 100-MW (340 million Btu/hr) fossil fuel heat input capacity would have a 33-MW potential electrical output capacity). For electric utility combined cycle gas turbines the potential electrical output capacity is determined on the basis of the fossil fuel firing capacity of the steam generator exclusive of the heat input and electrical power contribution by the gas turbine.

(w) "Anthracite" means coal that is classified as anthracite according to the American Society of Testing and Materials' (ASTM) Standard Specification for Classification of Coals by Rank D388-66.

(x) "Solid-Derived Fuel" means any solid, liquid, or gaseous fuel derived from solid fuel for the purpose of creating useful heat and includes, but is not limited to, solvent refined coal, liquified coal, and gasified coal.

(y) "24-Hour Period" means the period of time between 12:01 a.m. and 12:00 midnight.

(z) "Resource Recovery Unit" means a facility that combusts more than 75 percent non-fossil fuel on a quarterly (calendar) heat input basis.

(aa) "Noncontinental Area" means the State of Hawaii, the Virgin Islands, Guam, American Samoa, the Commonwealth of Puerto Rico, or the Northern Mariana Islands .

(bb) "Boiler Operating Day" means a 24-hour period during which fossil fuel is combusted in a steam generating unit for the entire 24 hours.