Outdated Standard Exemptions 73-80, July 15, 1988
Clicking on a highlighted number below links you to the standard exemption.73 | 74 | 75 | 76 | 77 | 78 | 79 | 80
73. Any portable rock crusher with a production rate of 200 tons per hour or less that operates according to the following conditions:
74. Any grain handling, storage, and drying facility which meets conditions (a), (b), or (c) below.
- (1) The total storage capacity does not exceed 750,000 bushels.
- (2) The grain handling capacity does not exceed 4,000 bushels per hour.
- (3) The facility is located at least 500 feet from any recreational area or residence or business not occupied or used solely by the owner of the facility.
- (1) The total storage capacity of the new and any existing facility or facilities does not exceed 1,500,000 bushels.
- (2) The facility shall be located at least 1/2 mile from any recreational area or residence or other structure not occupied or used solely by the owner or operator of the facility or the owner of the property upon which the facility is located.
- (3) Before construction of the facility begins, written site approval shall be received from the Executive Director of the Texas Air Control Board (TACB) and the facility shall be registered with the appropriate Regional Office using Form PI-7.
- (1) There shall be no increase in hourly grain handling capacity.
- (2) Existing grain receiving and loadout facilities are utilized.
- (3) Grain shall be conveyed by closed conveying systems and air suction shall not be pulled on any conveying unit.
- (4) Written site approval shall be received from the Executive Director of the TACB before construction begins for facilities utilizing existing grain receiving facilities when new gravity or auger loadout systems are to be installed.
75. Surface coating facilities in which no metal spraying or metalizing is done if the total emission of VOC used for cleanup and contained in the coating materials as applied is less than 6.0 lb/hr, averaged over any 4-hour period, and 500 pounds per week, and:
- (1) If the facility is a spraying operation, all spraying is conducted in a spray booth or work area in which the emissions of particulate matter are controlled by either a water wash system or a dry filter system. For either system, the particulate removal efficiency shall be not less than 90%; and:
- (A) The average velocity of ventilating air through the spray booth or work area shall be at least 100 ft/min, with a minimum face velocity at the opening of 50 ft/min, and
- (B) The face velocity at the filter media shall not exceed 250 ft/min or that specified by the filter media manufacturer.
- (2) Surface coating operations may include drying or curing ovens which accelerate the release of VOC from the coatings applied by using facilities covered under this standard exemption, provided that there is no increase in the total emission of VOC from the applied coatings, and the drying or curing ovens meet the following conditions, if not electrically heated:
- (A) The maximum heat input to any oven shall not exceed 40 million British thermal units oer hour (btu/hr), and
- (B) Heat shall be provided by the combustion of sweet natural gas, liquid petroleum gas, fuel gas containing no more than 0.1 grain of total sulfur compounds (calculated as sulfur) per dry standard cubic foot, or No. 2 fuel oil with not more than 0.5% sulfur by weight; or by electric power.
- (1) Coating materials shall not contain any chromates and all coating materials shall be a resin and/or pigment combination dissolved in a fast drying lacquer solvent (high solvent - power solvent generally equivalent to an automotive type to coat lacquer), where drying occurs by evaporation of the solvent only (with no chemical change of the materials) and deposition of the resin and/or pigment, and
- (2) No outdoor spraying is done if the wind speed exceeds 13 miles per hour, and
- (3) No spraying is conducted less than 20 feet from the property line and 100 feet from the nearest residence.
- (1) VOC paint and cleanup solvent emissions do not exceed 2,000 pounds per year, 240 pounds per week, and 6.0 lb/hr averaged over any 4-hour period.
- (2) The painting is performed at least 250 feet form any recreational area or residence or other structure not occupied or used solely by the owner or operator of the facility or the owner of the property upon which the facility is located.
- (3) No outdoor spraying is done if the wind speed exceeds 13 miles per hour.
- (4) No spraying is conducted less than 50 feet from the property line.
- (5) Before construction begins, the facility is registered with the appropriate regional office using Form PI-7.
- (6) Before construction of the facility begins, written site approval shall be received from the Executive Director of the TACB and any local air pollution control program having jurisdiction in the area.
76. Any new or modified pilot plant, provided that the following conditions are satisfied:
- (1) Testing the manufacturing or marketing potential of a proposed product, or
- (2) Defining the design of a larger plant, or
- (3) Studying the behavior of an existing plant through modeling in the pilot plant.
77. Any wet sand and gravel production facility that obtains its material from subterranean and subaqueous beds where the deposits of sand and gravel are consolidated granular materials resulting from natural disintegration of rock and stone and whose production rate is 500 tons per hour or less. All permanent in-plant roads shall be paved and cleaned as necessary or watered as necessary to achieve maximum control of dust emissions.
78. Hydrochloric acid storage tanks used exclusively for the storage of hydrochloric acid with an acid strength of 38% by weight or less. If an acid more concentrated than 20% by weight is stored, the tank vent must be controlled to reduce emissions by at least 99%.
79. Iron sponge gas treating units processing streams containing less than 60 pounds per hour of hydrogen sulfide provided that the following conditions are satisfied:
80. Smokeless gas flares which meet the following:
- (1) The flare shall be equipped with a flare tip designed to provide good mixing with air, flame stability, and a tip velocity less than 60 feet per second (ft/sec) for gases having a lower heating value less than 1,000 British thermal units per cubic foot (Btu/ft3) or a tip velocity less than 400 ft/sec for gases having a lower heating value greater than 1,000 Btu/ft3.
- (2) The flare shall be equipped with a continuously burning pilot or other automatic ignition system that assures gas ignition and provides immediate notification of appropriate personnel when the ignition system ceases to function. A gas flare which emits no more than 4.0 pounds per hour (lb/hr) of reduced sulfur compounds, excluding sulfur oxides, is exempted from the immediate notification requirement provided the emission point height meets the requirements of condition (d) of Standard Exemption 66.
- (3) A flare which burns gases containing more than 24 parts per million by volume (ppmv) of sulfur, chlorine, or compounds containing either element shall be located at least 1/4 mile from any recreational area or residence or other structure not occupied or used solely by the owner or operator of the flare or the owner of the property upon which the flare is located.
- (4) The heat release of a flare which emits sulfur dioxide (SO2) or hydrogen chloride (HCl) shall be greater than or equal to the following values:
For HCl Q = 2.73 × 105 × HCl
For SO2 Q = 0.53 × 105 × SO2
Q = heat release, British thermal units per hour, based on lower heating value
HCl = HCl emission rate, lb/hr
SO2 = SO2 emission rate, lb/hr
- (1) The flare shall burn a combustible mixture of gases containing only carbon, hydrogen, nitrogen, oxygen, sulfur, chlorine, or compounds derived from these elements. When the gas stream to be burned has a net or lower heating value of more than 200 Btu/ft3 prior to the addition of air, it may be considered combustible.
- (2) A flare which burns gases containing more than 24 ppmv of sulfur, chlorine, or compounds containing either element shall be registered with the appropriate Regional Office using Form PI-7 prior to construction of a new flare or prior to the use of an existing flare for the new service.
- (3) Under no circumstances shall liquids be burned in the flare.
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