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You are here: Home / Permitting / Air Permits / PermitByRule / Historical Rules / oldselist / Standard Exemptions for Apr. 95 / Outdated Standard Exemptions 73 - 80, April 5, 1995

Outdated Standard Exemptions 73 - 80, April 5, 1995

Outdated Title 30 TAC 116 Standard Exemptions organized by exemption number and date.

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:

(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 Natural Resource Conservation Commission (TNRCC) and the facility shall be registered with the TNRCC Office of Air Quality in Austin 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 Natural Resource Conservation Commission (TNRCC) and the facility shall be registered with the TNRCC Office of Air Quality in Austin using Form PI-7.

(c) The installation of additional grain storage capacity which satisfies the following conditions:

(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 TNRCC before construction begins for facilities utilizing existing grain receiving facilities when new gravity or auger loadout systems are to be installed.

75. Surface coating or stripping facilities, excluding vehicle repair and refinish shops must meet all of the following conditions:

(a) There shall be no volatile organic compounds (VOC) or exempt solvent (non-VOC) control equipment used to meet the limits of this exemption.

(b) No metal spraying or metalizing (the deposition or spraying of molten metal onto a surface to form a coating) is allowed. This does not exclude the use of metallic coating pigments.

(c) The total uncontrolled emission of VOC and exempt solvents that are contained in the coating materials as applied and used for cleanup must not exceed the following for all operations:

(1) 25 tons per year (tpy) of VOC and 10 tpy of exempt solvents for all surface coating and stripping operations (sources) covered by standard exemption at a site.

(2) 30 pounds per hour (lb/hr) of VOC and 5.0 lb/hr of exempt solvents for all surface coating and stripping operations (sources) covered by standard exemption at a site.

(3) 6.0 lb/hr of VOC, averaged over any four-hour period, and 500 pounds per week on a per source basis.

(4) If emissions are less than 0.25 lb/hr of VOC and/or exempt solvents, a facility is exempt from the requirements of conditions (e), (g), (i), (j), (k), and (l).

(d) Facilities using non-electric drying or curing ovens that accelerate the release of VOC from the applied coatings (provided that there is no increase in the total emission of VOC from the applied coatings) must meet the following conditions:

(1) The maximum heat input to any oven shall not exceed 40 million British thermal units per hour, and

(2) Heat shall be provided by the combustion of sweet natural gas, liquid petroleum gas, fuel gas containing no more than 5.0 grains of total sulfur compounds (calculated as sulfur) per 100 dry standard cubic foot, or Number 2 fuel oil with not more than 0.3% sulfur by weight.

(e) The following records shall be maintained in sufficient detail to demonstrate compliance with this standard exemption:

(1) Material Safety Data Sheets for all coating materials and solvents currently in use and those in use for the two previous years shall be kept at the plant site.

(2) Data of daily coatings and solvent use and the actual hours of operation of each coating or stripping operation (source).

(i) Data shall be reduced monthly and a report produced monthly that represents hours of operation each day, and emissions from each source in pounds per hour, pounds per day, pounds per week and tons emitted from the site during the previous 12-month period.

(ii) The reports shall be completed no later than the 15th day of the following month.

(3) The records required shall be kept on-site with examples of the method of data reduction including units, conversion factors, assumptions, and the basis of the assumptions.

(4) Records shall be maintained on a rolling two-year retention period and be made immediately available to the Texas Natural Resource Conservation Commission (TNRCC) or any air pollution control agency with jurisdiction.

(f) All facilities covered by this exemption at a site shall implement good housekeeping procedures to minimize fugitive emissions, including the following:

(1) All spills shall be cleaned up immediately.

(2) All spray gun and equipment clean up shall be performed with the booth or work area fans operating. As much of the waste solvent shall be collected as possible.

(3) All waste coatings, solvents, and spent cleanup solvents shall be stored in sealed containers until removal from the site by an authorized disposal service or until emptying into authorized on-site waste management facilities.

(4) There shall be no visible dust emissions from handling, storage, and disposal of particulate matter captured in the spray booth dust collection systems.

(g) Opacity of emissions from any emission point must not exceed 5.0% as determined by the United States Environmental Protection Agency Method 9 averaged over a six-minute period, except for those periods described in 30 TAC Section 111.111(a)(1)(E).

(h) Facilities located in ozone nonattainment counties shall meet the requirements of 30 TAC Chapter 115, Subchapter B, concerning general vent gas control and Subchapter E, concerning surface coating processes.

(i) Before construction begins, the facility must be registered with the TNRCC Office of Air Quality using Form PI-7.

(j) A spray booth or work area is considered enclosed for the purposes of this exemption if the average velocity of ventilating air through the spray booth or work area for electrostatic spray application systems has a minimum velocity of 60 feet per minute (ft/min). All other systems shall have a minimum ventilating air velocity of 100 ft/min. Additionally, all spray booths and work areas shall have a minimum face velocity at the opening of 50 ft/min. The following conditions apply to surface coating operations performed indoors or in an enclosed work area:

(1) Spraying operations shall be conducted in a spray booth or enclosed 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 at least 95% as documented by the filter media or water wash system manufacturer; and:

(A) The face velocity at the filter media shall not exceed 250 ft/min or that specified by the filter media manufacturer. The pressure drop across the filter as recommended by the filter media manufacturer shall be used.

(B) Spray booth emissions shall be exhausted through elevated stacks that extend at least 1.5 times the building height above grade. All stacks shall have vertical discharges and be equipped with rain protection that produces no restrictions or obstructions to vertical flow.

(2) Dipping, brushing, rolling, or other non-spraying operations shall be conducted in a booth or enclosed work area such that the emissions shall be exhausted through elevated stacks that extend at least 1.5 times the building height above grade. All stacks shall have vertical discharges and be equipped with rain protection that produces no restrictions or obstructions to vertical flow.

(k) For surface coating operations that are performed outdoors or in a non-enclosed work area (areas which do not meet the requirements of (j)), the following conditions apply:

(1) Only one outdoor or non-enclosed source may be in operation at any time.

(2) Spray applied coating materials shall not contain any chromates, lead, cadmium, selenium, strontium, or cobalt.

(3) Coating materials that contain chromates, lead, cadmium, selenium, strontium, or cobalt may be used with application equipment (such as brushes, rollers, dipping or flow coating) that does not produce particulate emissions.

(4) Coating shall be conducted at least 50 feet from the property line and at least 250 feet from any recreational area, 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.

(5) Before construction of the facility begins, written site approval shall be received from the appropriate air program regional office of the TNRCC and any local program having jurisdiction in the area.

(l) Outdoor or nonenclosed surface coating operations that meet all of the following conditions are exempt from the control requirements.

(1) Only one outdoor or non-enclosed coating operation may be conducted at any time.

(2) VOC and exempt solvent, paint, cleanup solvent and stripper emissions do not exceed 2,000 pounds per year, 240 pounds per week, and 6.0 lb/hr averaged over any four-hour period.

(3) Coating shall be conducted at least 50 feet from the property line and at least 250 feet from any recreational area, 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.

(4) Before construction of the facility begins, written site approval shall be received from the appropriate air program regional office of the TNRCC and any local program having jurisdiction in the area.

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

(a) For purposes of this exemption, a pilot plant is defined as a facility that is constructed and operated only for one of the following purposes:

(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.

(b) The sum of product, co-product, and by-product production design capacity from the pilot plant shall not exceed five million pounds per year.

(c) Operation of the pilot plant for purposes of testing market potential of a product, co-product, or by-product may not occur beyond the end of the fifth calendar year from the year of initial production (year 1) of the specific product, co-product, or by-product, unless a permit is obtained pursuant to 30 TAC Section 116.1, relating to Permit Requirements. This five-year limit on pilot plant activity applies to equipment devoted to development of one specific product or process; therefore, that equipment can be subsequently used for development of other process(es) or product(s), setting a new time limit for its use.

(d) The pilot plant shall be located at least 500 feet 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) New or increased emissions shall not exceed 6.0 pounds per hour (lb/hr) and 10 tons per year in total (including fugitives) and shall not exceed 1.0 lb/hr at any single stack (excluding fugitives). In addition, total new or increased emissions of each specific chemical shall not exceed the most stringent applicable requirement of the following:

(1) the chemical-specific emission limits determined by paragraph (c) of Standard Exemption 118;

(2) the chemical-specific emission limits determined by paragraph (d) of Standard Exemption 106; or

(3) 6.0 lb/hr for any simple asphyxiant as defined by the American Conference of Governmental Industrial Hygienists.

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 psia 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 Texas Natural Resource Conservation Commission Office of Air Quality in Austin 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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