Exemptions
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 are products of combustion of the
fuel.
(b) The maximum heat input is 40 million BTU per hour (Btu/hr) and
the fuel is:
- 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,
(c) The maximum heat input is 10 million BTU/hr and the fuel
is first run refinery grade diesel or No. 2 fuel oil that is not a
blend containing waste oils or solvents and that contains less than
0.5% by weight sulfur.
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 has 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. All printing presses except (a)
those which will emit 15 tons per year or more of volatile organic
solvents, including but not limited to, those used for printing,
cleanup or makeup or (b) those which utilize heat set or thermo set
inks.
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 applying 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 5-cubic feet or less.
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 occurs 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, liquefied petroleum gas,
electricity or any combination thereof where.
(a) the total heat input is 10 million BTU 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 tons 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 that no oil
or solid fuel is burned.
43. Laundry dryers, extractors or
tumblers used for fabrics cleaned only 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
calendars for rubber or plastics where no material in powder form
is added and in which no organic solvents, diluents or thinners are
used.
47. Equipment used exclusively to
package pharmaceuticals and cosmetics or to coat pharmaceutical
tablets.
48. Roll mills or calendars for
rubber or plastics in which organic solvents, diluents or thinners
are used provided that before construction begins the facility is
registered with From 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:
animal fats, asphalt, detergents, diesel fuels, fuel oils, greases,
kerosene, lube oil additives, lube oils, polymers, resins, soaps,
vegetable oils, wax emulsions, waxes
(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 F
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 300F
or greater listed in 40 CFR 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 rail cars, tank trucks or drums; and
storage contains, 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 (tpy) 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:
- Organic liquids normally used as
solvents, diluents, thinners, inks, colorants, paints, lacquers,
enamels, varnishes, liquid resins or other surface coatings.
- 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
Regulation V of the Texas Air Control Board.
(f) Facilities used for the loading, unloading or storage of
any compound listed in 40 CFR 261, Appendix VIII are not exempt
under this standard exemption.
54. Reserved.
55. Reserved.
56. Reserved.
57. Electrically heated or sweet
natural gas or LP gas fueled equipment used exclusively for heat
treating, soaking, case hardening or surface conditioning of metal
objects, such as carbonizing, cyaniding, nitriding,
carbon-nitriding, 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 1000 pounds or less with the following
limitations:
- No smelting, reduction, sweating,
metal separation or distilling is conducted.
- 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.
- In non-ferrous 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.
- 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 waste water treatment
units, provided all of the following conditions are met:
(a) The facility performs only one or more of the following
functions: biological treatment, carbonation, clarification,
disinfection, filtration, flocculation, neutralization,
sedimentation, softening, stabilization, taste and odor control.
aeration (for oxidation/biodegration purposes only)
volatile organic compounds (VOC)/water separation where the
sum of the partial pressures of all VOC is less than 1.5 psia.
(b) Water and wastewater treatment facilities using
incineration, VOC/water separation from water where the sum of the
partial pressures of all VOC is 1.5 psia or greater, gas stripping
or aeration where VOC or other air contaminants are stripped from
water, land surface treatment disposal and surface facilities
associated with injection wells are not exempt.
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