Exemption
Clicking on a highlighted number below
links you to the standard exemption.
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7. Boilers, heaters, drying or curing
ovens, furnaces, or other combustion units, but not including
stationary internal combustion engines or turbines, provided that
the following conditions are met:
(a) The only emissions shall be products of combustion of the
fuel.
(b) The maximum heat input shall be 40 million British thermal
unit (Btu) per hour with the fuel being:
(1) Sweet natural gas, or
(2) Liquid petroleum gas, or
(3) Fuel gas containing no more than 0.1 grain of total sulfur
compounds, calculated as sulfur, per dry standard cubic foot, or
(4) Combinations of the above fuels.
(5) Distillate fuel oil fired as a backup fuel only. Firing
shall be limited to 720 hours per year. The fuel oil shall contain
less than 0.3% sulfur by weight and shall not be blended with waste
oils or solvents.
(c) All gas fired heaters and boilers with a heat input
greater than 10 million Btu per hour (higher heating value) shall
be designed such that the emissions of nitrogen oxide shall not
exceed 0.1 lb per million Btu heat input.
(d) Records of hours of fuel oil firing and fuel oil purchases
shall be maintained on-site on a two-year rolling retention period
and made available upon request to the Texas Natural Resource
Conservation Commission or any local air pollution control agency
having jurisdiction.
8. Water cooling towers, water treating
systems for process cooling water or boiler feedwater, and water
tanks, reservoirs, or other water containers designed to cool,
store, or otherwise handle water (including rainwater) that have
not been used in direct contact with gaseous or liquid process
streams containing carbon compounds, sulfur compounds, halogens or
halogen compounds, cyanide compounds, inorganic acids, or acid
gases.
9. Equipment used exclusively for steam
or dry cleaning of fabrics, plastics, rubber, wood, or vehicle
engines or drive trains.
10. Presses used exclusively for
extruding metals, minerals, plastics, rubber, or wood except where
halogenated carbon compounds or hydrocarbon solvents are used as
foaming agents. Presses used for extruding scrap materials or
reclaiming scrap materials are not exempt.
11. Presses used for the curing of
rubber products and plastic products.
12. Equipment used for hydraulic or
hydrostatic testing.
13. Printing operations, (including,
but not limited to, screen printers, ink-jet printers, presses
using electron beam or ultraviolet light curing, and labeling
operations) and supporting equipment (including, but not limited
to, corona treaters, curing lamps, preparation, and cleaning
equipment) which directly supports the printing operation, provided
that all the following conditions are satisfied:
(a) The uncontrolled emission of volatile organic compounds
(VOC) and solvents (including, but not limited to, those used for
printing, cleanup, or makeup) shall not exceed the following rates:
-
- 15 tons per year (tpy) for any single
printing operation proposed to be covered by this standard
exemption, and
-
- 25 tpy for all printing operations on
the property covered by standard exemptions.
(b) Facilities which release ten tpy or more of VOC emissions
from all exempted printing operations at the site must register
with the Texas Natural Resource Conservation Commission using Form
PI-7.
(c) Copying and duplicating equipment employing the
xerographic method are exempt from conditions (d) - (f) of this
exemption.
(d) Printing presses covered by this standard exemption shall
not utilize heat set, thermo set, or oven dried inks. Heated air
may be used to shorten drying time provided the temperature does
not exceed 194 degrees Fahrenheit (90 degrees Celsius).
(e) Records of ink and solvent usage shall be kept in
sufficient detail to show compliance with condition (a) of this
exemption and shall be maintained for a two-year rolling retention
period.
(f) Screen printing operations requiring temperatures greater
that 194 degrees Fahrenheit (90 degrees Celsius) to set the ink are
exempt from condition (d).
(g) Facilities located in ozone nonattainment areas shall meet
the requirements of 30 TAC Chapter 115, Subchapter B, concerning
general vent gas control, and Subchapter E, concerning printing
processes.
14. Equipment used exclusively to
store and dispense motor fuels into heavy and light-duty motor
vehicles, and marine vessels or other watercraft, aircraft, and
railroad locomotive engines.
15. Equipment used exclusively for
the dyeing or stripping of textiles.
16. Equipment used exclusively to
mill or grind coatings and molding compounds where all materials
charged are in a paste form.
17. Crucible or pot furnaces with a
brim full capacity of less than 450 cubic inches of any molten
metal.
18. Equipment used exclusively for
the melting or application of wax.
19. Equipment used exclusively for
bonding lining to brake shoes.
20. Equipment used in eating
establishments for the purpose of preparing food for human
consumption.
21. Equipment used exclusively to
store or hold dry natural gas.
22. All closed tumblers used for the
cleaning or deburring of metal products without abrasive blasting,
and all open tumblers with a batch capacity of 1,000 pounds or
less.
23. Shell core and shell mold
manufacturing machines.
24. Sand or investment molds with a
capacity of 100 pounds or less used for the casting of metals.
25. Batch mixers with rated capacity
of five cubic feet or less for mixing cement, sand, aggregate,
additives, and/or water or similar materials.
26. Equipment used exclusively for
the packaging of lubricants or greases.
27. Equipment used exclusively for
conveying and storing plastic and/or rubber solid materials,
provided that no visible emissions occur and:
(a) Equipment used for conveying of powders or resins to
storage silos must be equipped with fabric filter(s) having a
maximum filtering velocity of 4.0 feet per minute (ft/min) with
mechanical shaking or 7.0 ft/min with air cleaning, and
(b) Transfer of powders or resins is accomplished in an
enclosed system.
28. Equipment used exclusively for
the mixing and blending of materials at ambient temperature to make
water-based adhesives.
29. Smokehouses in which the maximum
horizontal inside cross-sectional area does not exceed 100 square
feet.
30. Platen presses used for
laminating.
31. Blast cleaning equipment using a
suspension of abrasives in water.
32. Ovens, mixers, blenders, barbecue
pits, and cookers if the products are edible and intended for human
consumption.
33. Kilns used for firing ceramic
ware, heated exclusively by natural gas, liquid petroleum gas,
electricity, or any combination thereof where:
(a) the total heat input is 10 million British thermal units
per hour or less, and
(b) there are no emissions of lead, beryllium, or fluorides,
and emissions of sulfur dioxide and particulate matter from both
the material being fired and fuel burned do not exceed 25 tons per
year of either air contaminant.
34. Bench scale laboratory equipment,
and laboratory equipment used exclusively for chemical and physical
analyses.
35. Equipment used for inspection of
metal products.
36. Equipment used exclusively for
rolling, forging, pressing, drawing, spinning, or extruding either
hot or cold metals by some mechanical means.
37. Die casting machines.
38. Photographic process equipment by
which an image is reproduced upon material sensitized to radiant
energy.
39. Brazing, soldering, or welding
equipment, except those which emit 0.6 ton per year or more of
lead.
40. Hand-held or manually operated
equipment used for buffing, polishing, carving, cutting, drilling,
machining, routing, sanding, sawing, surface grinding, or turning
of ceramic art work, ceramic precision parts, leather, metals,
plastics, fiber board, masonry, carbon, glass, graphite, or wood.
41. Equipment using aqueous solutions
for anodizing, electrodeposition, electroless plating, electrolytic
polishing, and stripping of brass, bronze, cadmium, copper, iron,
lead, nickel, tin, zinc, and precious metals; and for cleaning,
stripping, etching, or other surface preparation; but not including
chemical milling or electrolytic metal recovery and reclaiming
systems.
42. Equipment used for washing or
drying products fabricated from metal or glass, provided no
volatile organic materials are used in the process and no oil or
solid fuel is burned.
43. Laundry dryers, extractors, or
tumblers used for fabrics cleaned with water solutions of bleach or
detergents.
44. Foundry sand mold forming
equipment to which no heat is applied.
45. Equipment used for compression
molding and injection molding of plastics.
46. Mixers, blenders, roll mills, or
calenders for rubber or plastics, provided the following conditions
are satisfied:
(a) Organic solvents, diluents, or thinners shall not be used.
(b) Material in powder form shall not be added unless the
mixer, blender, roll mill, or calender is vented to a fabric filter
having a maximum filtering velocity of 4.0 feet per minute (ft/min)
with mechanical cleaning, or 7.0 ft/min with automatic air
cleaning.
(c) There shall be no visible emissions.
Mixers, blenders, roll mills, or calenders handling or adding
asbestos shall not be eligible for this exemption.
47. Equipment used exclusively to
package pharmaceuticals and cosmetics or to coat pharmaceutical
tablets.
48. Roll mills or calenders for
rubber or plastics in which organic solvents, diluents, or thinners
are used, provided that before construction begins, the facility is
registered with Form PI-7 and information regarding process rate
and type of material emitted is submitted.
49. Vacuum producing devices used in
laboratory operations.
50. Containers, reservoirs, or tanks
used exclusively for dipping operations for coating objects with
oils, waxes, or greases where no organic solvents, diluents, or
thinners are used; or dipping operations for applying coatings of
natural or synthetic resins which contain no organic solvents.
51. Liquid loading or unloading
equipment for railcars, tank trucks, or drums; storage containers,
reservoirs, tanks; and change of service of material loaded,
unloaded, or stored, provided that no visible emissions result and
the chemicals loaded, unloaded, or stored are limited to:
(a) the following list:
asphalt, waxes, wax emulsions, resins, polymers, vegetable
oils, soaps, detergents, greases,
lube oils, lube oil additives, animal fats, fuel oils,
kerosene, diesel fuels
(b) water or wastewater,
(c) aqueous salt solutions,
(d) aqueous caustic solutions, except ammonia solutions,
(e) inorganic acids except oleum, hydrofluoric, and
hydrochloric acids,
(f) aqueous ammonia solutions if vented through a water
scrubber,
(g) hydrochloric acid if vented through a water scrubber,
(h) acetic acid if vented through a water scrubber,
(i) organic liquids having an initial boiling point of 300
degrees Fahrenheit or greater. Facilities loading, unloading, or
storing butyric acid, isobutyric acid, methacrylic acid,
mercaptans, croton oil, 2-methyl styrene, or any other compound
with an initial boiling point of 300 degrees Fahrenheit or greater
listed in 40 Code of Federal Regulations 261, Appendix VIII 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.
52. Reserved.
53. Organic liquids loading or
unloading equipment for railcars, tank trucks, or drums; and
storage containers, tanks, or change of service of the material
loaded, unloaded, or stored, provided that all of the following
conditions are met:
(a) Uncontrolled emissions calculated using the version of
AP-42 in effect at the time are less than 25 tons per year of
organic compounds or of any other air contaminant.
(b) The loading rate of the facilities does not exceed 20,000
gallons per day averaged over any consecutive 30-day period.
(c) The capacity of any tank does not exceed 25,000 gallons
except that tanks having a capacity of less than 40,000 gallons may
be used to store sweet crude oil, sweet natural gas condensate,
gasoline, and petroleum fuels.
(d) The facilities are used exclusively for the loading,
unloading, or storage of:
(1) Organic liquids normally used as solvents, diluents,
thinners, inks, colorants, paints, lacquers, enamels, varnishes,
liquid resins, or other surface coatings.
(2) Petroleum, petroleum fuels, other motor vehicle fuels, and
natural gas liquids, none of which have a true vapor pressure of
11.0 psia or greater at maximum temperature of use.
(e) The facilities will meet any applicable requirements of 30
TAC Chapter 115.
(f) Facilities used for the loading, unloading, or storage of
any compound listed in 40 Code of Federal Regulations 261, Appendix
VIII are not exempt under this standard exemption.
54. Reserved.
55. Reserved.
56. Reserved.
57. Electrically heated or sweet
natural gas or liquid petroleum gas fueled equipment used
exclusively for heat treating, soaking, case hardening, or surface
conditioning of metal objects, such as carbonizing, cyaniding,
nitriding, carbonnitriding, siliconizing, or diffusion treating.
58. Metal Melting and Holding
Furnaces as specified below:
(a) Crucible furnaces, pot furnaces, or induction furnaces
with a holding capacity of 1,000 pounds or less, with the following
limitations:
(1) No smelting, reduction, sweating, metal separation, or
distilling is conducted.
(2) In ferrous melting furnaces where gray iron or steel is
melted.
(A) Ductile iron is not produced, and
(B) The furnace charge is free of oil, grease, and paint.
(3) In nonferrous melting furnaces, only the following metals
are melted, poured, or held in a molten state:
(A) Aluminum or any alloy containing over 50% aluminum.
(B) Magnesium or any alloy containing over 50% magnesium.
(C) Tin or any alloy containing over 50% tin.
(D) Zinc or any alloy containing over 50% zinc.
(E) Copper.
(F) Precious metals.
(4) No lead, leaded brass, leaded bronze, or magnesium bronze
is melted, poured, or held in a molten state.
(b) Aluminum melting or holding furnaces with a holding
capacity of 2,000 pounds or less that melt only clean aluminum
ingots or pigs and in which no refining, smelting, metal
separation, sweating, distilling, or fluxing is performed.
59. Vacuum cleaning systems used
exclusively for industrial, commercial, or residential housekeeping
purposes.
60. Sewage treatment facilities
(excluding combustion or incineration equipment, land farms,
or grease trap waste handling or treatment facilities).
61. Water and wastewater treatment
units, provided the following conditions are met:
(a) The facility performs only the following functions:
(1) disinfection*,
(2) softening,
(3) filtration,
(4) flocculation,
(5) stabilization,
(6) taste and odor control,
(7) clarification,
(8) carbonation,
(9) sedimentation,
(10) neutralization,
(11) chlorine removal,
(12) activated sludge treatment, anaerobic treatment, and
associated control of gases from these treatments,
(13) aerobic oxidation/biodegration using oxygen or peroxide
in the absence of nitrogen or other gas that would cause stripping
of volatile organic compounds (VOC) from the water,
(14) stripping VOC, ammonia, or other air contaminants from
the water with air or other gas provided the stripped gases are
controlled with an abatement system that meets the requirements of
Standard Exemption 68(e). For ammonia or hydrogen chloride (HCl) or
other acid gas emissions, abatement may include a water or caustic
scrubbing system as a means of complying with this exemption. Final
emissions of HCl resulting from combustion of chlorine or
chlorine-containing compounds shall not exceed 0.1 pounds per hour,
(15) liquid phase separation of VOC and water in which: (1)
the sum of the partial pressures of all species of VOC in any
sample is less than 1.5 psia or (2) the separator is enclosed and
emissions are vented through an emission abatement system meeting
the requirements specified above for stripped VOC and ammonia.
* Chlorine or sulfur dioxide (SO2)shall be used only in
containers approved by the United States Department of
Transportation and emissions of chlorine or SO2 from treatment of
water or decontamination of equipment at any water treatment plant
shall not exceed 10 tons per year.
(b) The following shall not be exempted by this exemption:
(1) gas stripping or aeration facilities where VOC or other
air contaminants are stripped from water directly to the
atmosphere,
(2) disposal facilities using land surface treatment,
(3) surface facilities associated with injection wells,
(4) cooling towers in which VOC or other air contaminants may
be stripped to the atmosphere.
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