Outdated Standard Exemptions 73-80, June 7, 1996
Clicking on a highlighted number below links you to the standard exemption.73 | 74 | 75 | 76 | 77 | 78 | 79 | 80
73. Any rock crusher with a maximum rated capacity 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 and the facility shall be registered with the commission 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:
- The total storage capacity does not exceed 750,000 bushels.
- The grain handling capacity does not exceed 4,000 bushels per hour.
- 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:
- The total storage capacity of the new and any existing facility or facilities does not exceed 1.5 million bushels.
- The facility 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 facility or the owner of the property upon which the facility is located.
- Before construction of the facility begins, written site approval shall be received from the executive director and the facility shall be registered with the commission using Form PI-7.
(c) The installation of additional grain storage capacity which satisfies the following conditions:
- There shall be no increase in hourly grain handling capacity.
- Existing grain receiving and loadout facilities are utilized.
- Grain shall be conveyed by closed conveying systems and air suction shall not be pulled on any conveying unit.
- 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 refinishing shops, shall meet the following conditions:
(a) This exemption does not cover metalizing (spraying molten metal onto a surface to form a coating). However, this exemption does cover the use of coatings which contain metallic pigments.
(b) All facilities covered by this exemption at a site shall implement good housekeeping procedures to minimize fugitive emissions, including the following:
- All spills shall be cleaned up immediately.
- The booth or work area exhaust fans shall be operating when cleaning spray guns and other equipment.
- All new and used coatings and solvents shall be stored in closed containers. All waste coatings and solvents shall be removed from the site by an authorized disposal service or disposed of at a permitted on-site waste management facility.
(c) Drying or curing ovens shall either be electric or meet the following conditions:
- The maximum heat input to any oven must not exceed 40 million British thermal units per hour (Btu/hr), and
- Heat shall be provided by the combustion of one of the following: 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.
(d) No add-on control equipment shall be used to meet the emissions limits of this exemption. The total uncontrolled emissions from the coating materials (as applied) and cleanup solvents shall not exceed the following for all operations:
- 25 tons per year (tpy) of volatile organic compounds (VOC) and ten tpy of exempt solvents for all surface coating and stripping operations covered by standard exemption at a site.
- 30 pounds per hour (lb/hr) of VOC and 5.0 lb/hr of exempt solvents for all surface coating and stripping operations covered by standard exemption at a site.
- If emissions are less than 0.25 lb/hr of VOC and/or exempt solvents, a facility is exempt from the remaining requirements of this exemption, including conditions (e), (f), (g), (h), and (i).
(e) Opacity of visible emissions shall not exceed 5.0%. Compliance shall be determined by the United States Environmental Protection Agency Method 9 averaged over a six-minute period.
(f) The following conditions apply to surface coating operations performed indoors, in a booth, or in an enclosed work area:
- No more than six lb/hr of VOC emissions, averaged over any five-hour period, and 500 pounds per week per booth or enclosed work area.
- Minimum face velocity at the intake opening of each booth or work area is 100 feet per minute (ft/min). Emissions shall be exhausted through elevated stacks that extend at least 1.5 times the building height above ground level. All stacks shall discharge vertically; rain protection shall not restrict or obstruct vertical flow.
- For spraying operations, emissions of particulate matter must be controlled using either a water wash system or a dry filter system with a 95% removal efficiency as documented by the manufacturer. The face velocity at the filter shall not exceed 250 ft/min or that specified by the filter manufacturer, whichever is less. Filters shall be replaced whenever the pressure drop across the filter no longer meets the manufacturer's recommendation.
(g) For surface coating operations that are performed outdoors or in a non-enclosed work area, or for indoor operations that do not meet the conditions of (f), the following conditions apply:
- No more than six lb/hr of VOC emissions, averaged over any five-hour period, and 500 pounds per week shall be emitted at any time for all operations authorized by this paragraph.
- If coatings applied with spray equipment contain more than 0.1% by weight of chromates, lead, cadmium, selenium, strontium, or cobalt, then total VOC emissions shall be further limited to 240 pounds per week and 2,000 pounds per year. If coatings are applied with non-spray equipment (such as brushes, rollers, dipping or flow coating), the additional restrictions in this paragraph do not apply.
- Coating operations 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.
- Before construction of the facility begins, written site approval shall be received from the appropriate regional office of the commission or any local program having jurisdiction.
(h) The following records shall be maintained at the plant site for the most recent 24 months and be made immediately available to the commission or any pollution control agency with jurisdiction:
- Material Safety Data Sheets for all coating materials and solvents;
- data of daily coatings and solvent use and the actual hours of operation of each coating or stripping operation;
- a monthly report that represents actual hours of operation each day, and emissions from each operation in the following categories:
(A) pounds per hour;
(B) pounds per day;
(C) pounds per week; and
(D) tons emitted from the site during the previous 12 months;
(4) examples of the method of data reduction including units, conversion factors, assumptions, and the basis of the assumptions.
(i) Before construction begins, the facility shall be registered with the commission using Form PI-7.
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
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