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You are here: Home / Permitting / Air Permits / PermitByRule / Historical Rules / old117 / 896 / Outdated Title 30 TAC 117.601 Subchapter E, August 16, 1996

Outdated Title 30 TAC 117.601 Subchapter E, August 16, 1996

Outdated 30 TAC 117 and 31 TAC 117 rules, 31 TAC 117 date from 1972 and the rule changed to 30 TAC 117 in September 1993

<!-- h1>Outdated 30 TAC 117.601</h1 -->

<b />Adopted date: July 24, 1996</b><br>
<b />Effective date: August 16, 1996</b>
<p>
<h3>Subchapter E Gas Fired Steam Generation</h3>
<p>
<a name="601">117.601</a>. Gas-Fired Steam Generation.
<p>
(a) Subsections (b), (c), and (d) of this section shall apply only in the Dallas/Fort Worth Air
Quality Control Region which consists of Collin, Cooke, Dallas, Denton, Ellis, Erath, Fannin, Grayson,
Hood, Hunt, Johnson, Kaufman, Navarro, Palo Pinto, Parker, Rockwall, Somervell, Tarrant, and Wise
counties and in the Houston/Galveston Air Quality Control Region which consists of Austin, Brazoria,
Chambers, Colorado, Fort Bend, Galveston, Harris, Liberty, Matagorda, Montgomery, Waller, and
Wharton counties. For gas-fired steam generators located in applicable ozone nonattainment areas, only
the emission limitations of &#167 117.105 of this title (relating to Emission Specifications), &#167 117.107 of this title
(relating to Alternative System-Wide Emission Specifications), &#167 117.205 of this title (relating to Emission
Specifications), and &#167 117.207 of this title (relating to Alternative Plant-Wide Emission Specifications) shall
apply after May 31, 1999.
<p>
(b) No person shall allow emissions of nitrogen oxides (NOx), calculated as nitrogen dioxide
(NO2), from any "opposed-fired" steam generating unit of more than 600,000 pounds per hour (lbs/hr)
maximum continuous steam capacity to exceed 0.7 pound per million Btu (lb/MMBtu) heat input,
maximum two-hour average, at maximum steam capacity. An "opposed-fired" steam generating unit is
defined as a unit having burners installed on two opposite vertical firebox surfaces.
<p>
(c) No person shall allow emissions of NOx, calculated as NO2, from any "front-fired" steam
generating unit of more than 600,000 lbs/hr maximum continuous steam capacity to exceed 0.5 lb/MMBtu
heat input, maximum two-hour average, at maximum steam capacity. A "front-fired" steam generating
unit is defined as a unit having all burners installed in a geometric array on one vertical firebox surface.
<p>
(d) No person shall allow emissions of NOx, calculated as NO2, from any "tangential-fired" steam
generating unit of more than 600,000 lbs/hr maximum continuous steam capacity to exceed 0.25
lb/MMBtu heat input, maximum two-hour average, at maximum steam capacity. A "tangential-fired"
steam generating unit is defined as a unit having burners installed on all corners of the unit at various
elevations.
<p>
(e) Existing gas-fired steam generating units of more than 600,000 lbs/hour, but less than
1,100,000 lbs/hr, maximum continuous steam capacity are exempt from the provisions of this section,
provided the total steam generated from the unit during any one calendar year does not exceed 30% of the
product of the maximum continuous steam capacity of the unit times the number of hours in a year.
Written records of the amount of steam generated for each day's operation shall be made on a daily basis
and maintained for at least three years from the date of each entry. Such records shall be made available
for inspection by employees of state and local agencies having jurisdiction during regular business hours.
<p>
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