Outdated Standard Exemptions 73-80, July 15, 1988

Outdated Title 30 TAC 116 Standard Exemptions organized by exemption number and date.

Exemptions

Clicking on a highlighted number below links you to the standard exemption.

73. Any portable rock crusher with a production rate of 200 tons per hour or less that operates according to the following conditions:

(a) Operating schedule of the plant does not exceed 1,600 hours per year.

(b) All in-plant haul roads and stockpiles are sprinkled with water and/or chemicals as necessary to achieve maximum control of dust emissions.

(c) Water sprays are located at all belt transfer points, shaker screens, and inlet and outlet of all crushers and used as necessary to achieve maximum control of dust emissions.

(d) The plant is located at least 1/2 mile from any recreational area or residence or other structure not occupied or used solely by the owner of the facility or the owner of the property upon which the facility is located. (e) The plant is located at least 1,000 feet from any state or federal highway not currently under maintenance or construction.

(f) Before construction of the facility begins, written site approval is received from the Executive Director of the Texas Air Control Board and the facility shall be registered with the appropriate Regional Office using Form PI-7 including a current Table 17.

74. Any grain handling, storage, and drying facility which meets conditions (a), (b), or (c) below.

(a) The facility is in noncommercial use only - that is, used only to handle, dry, and/or store grain produced by the owner(s) of the facility if the following conditions are satisfied:

(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.

(b) The facility is in commercial use and the following conditions are satisfied:

(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:

(a) The surface coating operations are performed indoors or in an enclosed work area and the following conditions apply:

(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.

(b) The surface coating operations are performed outdoors or in a non-enclosed work area and the following conditions apply:

(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.

(c) Indoor and outdoor surface coating operations shall be exempt from the control requirements of (a) and (b) if all of the following conditions are satisfied:

(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.

(d) Records of hours of operation and the usage of coating materials and any solvents used for thinning and/or cleanup shall be maintained in sufficient detail to demonstrate compliance with this standard exemption. Records shall be maintained on a rolling 2-year retention period.

(e) The applicable requirements of Regulation V, concerning general vent gas streams and surface coatings, shall be satisfied.

76. Any new or modified pilot plant, provided that the following conditions are satisfied:

(a) The facility does not emit any chemical having a health threshold limit value of less than one part per million by volume as specified by the Occupational Safety and Health Administration (OSHA) or the American Conference of Governmental Industrial Hygienists (ACGIH). This exemption does not apply to pilot plants using chemicals for which OSHA or ACGIH threshold limit does not exist.

(b) The facility emits less than one pound per hour of any air contaminant.

(c) The plant is located at least 1/4 mile from any recreational area or residence or other structure not occupied or used solely by the owner of the facility or the owner of the property upon which the facility is located.

(d) The facility is constructed and operated only for the purpose of:

(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:

(a) The plant is located at least 1/4 mile from any recreational area or residence or other structure not occupied or used solely by the owner of the facility or the owner of the property upon which the facility is located.

(b) During replacement of the iron oxide impregnated chips, the unit is: (a) isolated from the main system and the pressure is reduced to 0.5 psig or less through a gas-fired flare, or (b) sulfur compound emissions to the atmosphere do not exceed one ton per replacement.

(c) The spent iron oxide chips being replaced are properly handled to avoid spontaneous ignition and avoid an odor nuisance.

80. Smokeless gas flares which meet the following:

(a) Design requirements:

(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

Where

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

(b) Operational conditions:

(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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