Ariz. Admin. Code § 18-2-703

Current through Register Vol. 30, No. 50, December 13, 2024

Section R18-2-703 - Standards of Performance for Existing Fossil-fuel Fired Steam Generators and General Fuel-burning Equipment

A. This Section applies to the following:

1. Installations in which fuel is burned for the primary purpose of producing power, steam, hot water, hot air or other liquids, gases or solids and in the course of doing so the products of combustion do not come into direct contact with process materials. When any products or by-products of a manufacturing process are burned for the same purpose or in conjunction with any fuel, the same maximum emission limitation shall apply, except for wood waste burners as regulated under R18-2-704.

2. All fossil-fuel fired steam generating units or general fuel burning equipment which are greater than or equal to 73 megawatts capacity.

B. For purposes of this Section, the heat input shall be the aggregate heat content of all fuels whose products of combustion pass through a stack or other outlet. The heat content of solid fuel shall be determined in accordance with R18-2-311. Compliance tests shall be conducted during operation at the nominal rated capacity of each unit.

C. No person shall cause, allow or permit the emission of particulate matter in excess of the amounts calculated by one of the following equations:

1. For equipment having a heat input rate of 4200 million Btu per hour or less, the maximum allowable emissions shall be determined by the following equation:

E = 1.02Q^0.769

where:

E = the maximum allowable particulate emissions rate in pounds-mass per hour.

Q = the heat input in million Btu per hour.

2. For equipment having a heat input rate greater than 4200 million Btu per hour, the maximum allowable emissions shall be determined by the following equation:

E = 17.0Q^0.432

where "E" and "Q" have the same meaning as in subsection (C)(1).

D. Actual values shall be calculated from the applicable equations and rounded off to two decimal places.

E. When low sulfur oil is fired:

1. Existing fuel-burning equipment or steam-power generating installations which commenced construction or a major modification prior to May 30, 1972, shall not emit more than 1.0 pounds sulfur dioxide maximum three-hour average, per million Btu (430 nanograms per joule) heat input.

2. Existing fuel-burning equipment or steam-power generating installations which commenced construction or a major modification after May 30, 1972, shall not emit more than 0.80 pounds of sulfur dioxide maximum three-hour average per million Btu (340 nanograms per joule) heat input.

F. When high sulfur oil is fired, all existing steam-power generating and general fuel-burning installations which are subject to the provisions of this Section shall not emit more than 2.2 pounds of sulfur dioxide maximum three-hour average per million Btu (946 nanograms per joule) heat input.

G. When solid fuel is fired:

1. Existing general fuel-burning equipment and steam-power generating installations which commenced construction or a major modification prior to May 30, 1972, shall not emit more than 1.0 pounds of sulfur dioxide maximum three-hour average, per million Btu (430 nanograms per joule) heat input.

2. Existing general fuel-burning equipment and steam-power generating installations which commenced construction or a major modification after May 30, 1972, shall not emit more than 0.80 pounds of sulfur dioxide, maximum three-hour average, per million Btu (340 nanograms per joule) heat input.

H. Any permit issued for the operation of an existing source, or any renewal or modification of such a permit, shall include a condition prohibiting the use of high sulfur oil by the permittee, unless the applicant demonstrates to the satisfaction of the Director that sufficient quantities of low sulfur oil are not available for use by the source and that it has adequate facilities and contingency plans to ensure that the sulfur dioxide ambient air quality standards set forth in R18-2-202 will not be violated.

1. The terms of the permit may authorize the use of high sulfur oil under such conditions as are justified.

2. In cases where the permittee is authorized to use high sulfur oil, it shall submit to the Department monthly reports detailing its efforts to obtain low sulfur oil.

3. When the conditions justifying the use of high sulfur oil no longer exists, the permit shall be modified accordingly.

4. Nothing in this Section shall be construed as allowing the use of a supplementary control system or other form of dispersion technology.

I. Existing steam-power generating installations which commenced construction or a major modification after May 30, 1972, shall not emit nitrogen oxides in excess of the following amounts:

1. 0.20 pounds of nitrogen oxides, maximum three-hour average, calculated as nitrogen dioxide, per million Btu heat input when gaseous fossil fuel is fired.

2. 0.30 pounds of nitrogen oxides, maximum three-hour average, calculated as nitrogen dioxide, per million Btu heat input when liquid fossil fuel is fired.

3. 0.70 pounds of nitrogen oxides, maximum three-hour average, calculated as nitrogen dioxide, per million Btu heat input when solid fossil fuel is fired.

J. Emission and fuel monitoring systems, where deemed necessary by the Director for sources subject to the provisions of this Section shall, conform to the requirements of R18-2-313.

K. The applicable reference methods given in the Appendices to 40 CFR 60 shall be used to determine compliance with the standards as prescribed in subsections (C) through (G) and (I). All tests shall be run at the heat input calculated under subsection (B).

Ariz. Admin. Code § R18-2-703

Former Section R18-2-703 repealed effective September 26, 1990 (Supp. 90-3). New Section R18-2-703 renumbered from R18-2-503 and amended effective November 15, 1993 (Supp. 93-4). Amended by final rulemaking at 13 A.A.R. 2157, effective August 4, 2007 (Supp. 07-2). Amended by final rulemaking at 15 A.A.R. 281, effective March 7, 2009 (Supp. 09-1).