NSR Standard Exemption Index, May 8, 1972
Numerical Index for Standard Exemptions
Reference date: May 8, 1972
Effective date: May 8, 1972
Clicking on a highlighted number below links you to the standard exemption.
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NPR - no permit required
1. Equipment, machines, devices, contrivances built or installed to be used at a domestic residence for domestic use.
2. Dual-chamber incinerators of less than 500 pounds per hour burning capacity for Type O and/or Type 1 waste only as defined by the Incinerator Standards of the Incinerator Institute of America November, 1968.
3. Combustion units designed for comfort heating purposes employing only natural gas as a fuel.
4. Combustion units designed for disposal of garbage and rubbish to be used at a commercial or residential establishment.
5. Comfort air conditioning systems or comfort ventilating systems which are not designed to remove air contaminants generated by or released from specific units of equipment.
6. Electric motors, electric generators, and integral engine-generator sets designed for portable, emergency and/or standby electric power service.
7. Gas fired internal combustion engines of less than 2000 hp and engine trains of less than 5000 hp total.
8. Natural gas or LP gas fired combustion units with rated fuel consumption less than 10,000 standard cubic feet per hour.
9. Water cooling towers and water cooling ponds not used for evaporative cooling of process water or not used for evaporative cooling of water from barometric jets or from barometric condensers.
10. Equipment used exclusively for steam cleaning and dry cleaning.
11. Presses used exclusively for extruding metals, minerals, plastics or wood.
12. Porcelain enameling furnaces, porcelain enameling drying ovens, vitreous enameling furnaces or vitreous enameling drying ovens.
13. Presses used for the curing of rubber products and plastic products.
14. Equipment used for hydraulic or hydrostatic testing.
15. All printing presses.
16. Tanks, vessels and pumping equipment used exclusively for the storage or dispensing of fresh commercial or pure grades of sulfuric acid with an acid strength of 99% or less by weight, phosphoric acid with an acid strength of 99% or less by weight, or nitric acid with an acid strength of 70% or less by weight.
17. Ovens used exclusively for the curing of plastics which are concurrently being vacuum held to a mold or ovens used exclusively for the softening or annealing of plastics.
18. Equipment used exclusively for the dyeing or stripping of textiles.
19. Equipment used exclusively to mill or grind coatings and molding compounds where all materials charged are in a paste form.
20. Crucible or pot furnaces with a brim full capacity of less than 450 cubic inches of any molten metal.
21. Equipment used exclusively for the melting or applying of wax.
22. Equipment used exclusively for bonding lining to brake shoes.
23. Equipment used in eating establishments for the purpose of preparing food for human consumption.
24. Equipment used exclusively to compress or hold dry natural gas.
25. 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.
26. Shell core and shell mold manufacturing machines.
27. Sand or investment molds with a capacity of 100 pounds or less used for the casting of metals.
28. Batch mixers with rated capacity of 5-cubic feet or less.
29. Equipment used exclusively for the packaging of lubricants or greases.
30. Equipment used exclusively for the manufacture of water emulsions of asphalt, greases, oils, or waxes.
31. Ovens used exclusively for the curing of vinyl plastisols by the closed mold curing process.
32. Equipment used exclusively for conveying and storing plastic pellets.
33. Equipment used exclusively for the mixing and blending of materials at ambient temperature to make water based adhesives.
34. Smokehouses in which the maximum horizontal inside cross sectional area does not exceed 100 square feet.
35. Platen presses used for laminating.
36. Blast cleaning equipment using a suspension of abrasives in water.
37. Ovens, mixers and blenders used in bakeries where the products are edible and intended for human consumption.
38. Kilns used for firing ceramic ware, heated exclusively by natural gas, liquified petroleum gas, electricity or any combination thereof.
39. Bench scale laboratory equipment and laboratory equipment used exclusively for chemical or physical analyses.
40. Confection cookers where the products are edible and intended for human consumption.
41. Equipment used for inspection of metal products.
42. Equipment used exclusively for rolling, forging, pressing, drawing, spinning or extruding either hot or cold metals by some mechanical means.
43. Die casting machines.
44. Photographic process equipment by which an image is reproduced upon material synthesized to radiant energy.
45. Brazing, soldering or welding equipment.
46. Hand held or manually operated equipment used for buffing, polishing, carving, cutting, drilling, machining, routing, sandblasting, sanding, sawing, surface grinding, or turning of ceramic art work, ceramic precision parts, leather, metals, plastics, rubber, fiber board, masonry, asbestos, carbon, or graphite.
47. Equipment using aqueous solutions for surface preparation (cleaning, stripping, etching, but not including chemical milling), or the electrolytic plating with electrolytic polishing and stripping of brass, bronze, cadmium, copper, iron, lead, nickel, tin, zinc, and precious metals.
48. 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.
49. Laundry dryers, extractors or tumblers used for fabrics cleaned only with water solutions of bleach or detergents.
50. Foundry sand mold forming equipment to which no heat is applied.
51. Ovens with a charging rate of less than 2,000 lbs/hr used exclusively for curing potting materials or castings made with epoxy resins.
52. Equipment used for compression molding and injection molding of plastics.
53. Mixers for rubber or plastics where no material in powder form is added and in which no organic solvents, diluents or thinners are used.
54. Equipment used exclusively to package pharmaceuticals and cosmetics or to coat pharmaceutical tablets.
55. Roll mills or calendars for rubber or plastics.
56. Vacuum producing devices used in laboratory operations.
57. 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.
58. Containers, reservoirs, or tanks used exclusively for unheated storage of organic materials with initial boiling point of 300°F or greater.
59. Containers, reservoirs, or tanks used exclusively for the storage of fuel oils with a gravity of 25 degrees API or lower; or for the storage of lubricating oils.
60. Containers, reservoirs, or tanks used exclusively for the storage of fuel oils with a gravity of 40 API or lower and having a capacity of 50,000 gallons or less.
61. Containers, reservoirs, or tanks with a capacity of 6,000 gallons or less used exclusively for the storage of organic liquids, except gasoline, normally used as solvents, diluents, or thinners; inks; colorants; paints; lacquers; enamels; varnishes; liquid resins; or other surface coatings.
62. Containers, reservoirs, or tanks used exclusively for the storage of liquid soaps, liquid detergents, vegetable oils, waxes, or wax emulsions.
63. Containers, reservoirs, or tanks used exclusively for the storage of asphalt.
64. Storage tanks with a capacity of less than 25,000 gallons, used exclusively for the storage of gasoline.
65. Equipment used for transporting materials on streets or highways, including those highways defined by Article X, Section 2 of the Constitution of Texas.
66. Equipment used exclusively for case hardening or surface conditioning of metal objects, such as carbonizing, cyaniding, nitriding, carbon-nitriding, siliconizing or diffusion treating.
67. Crucible furnaces, pot furnaces, or induction furnaces with a capacity of 1000 pounds or less, each in which no smelting, reduction, sweating, or distilling is conducted, and from which only the following metals are 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.
(f) Precious metals.
68. Vacuum cleaning systems used exclusively for industrial, commercial, or residential housekeeping purposes.
69. Sewage treatment facilities.
70. Waste water treatment facilities, where incineration is not used in the disposal system.
71. Animal feedlots designed to feed less than 1,000 animals, and expansions of existing feedlots in operation prior to March 1, 1972.
72. Stationary crude oil and condensate storage containers of 50,000 gallons or less in which only sweet crude oil is stored.
73. Gas dehydration units in fields processing sweet crude oil.
74. Gas oil separators.
75. Natural gas or LP gas fired emulsion treaters with rated fuel consumption of less than 10,000 standard cubic feet per hour.
76. Free water knock-outs.
77. Temporary separators, tanks, meters, and other fluid handling equipment used, for a period not to exceed thirty (30) days, to test the content of a subsurface stratum believed productive of oil or gas, provided that all emissions to the atmosphere other than stock tank vapors be flared.
78. Temporary separators, heaters, flow treaters, meters, storage tanks, and other fluid handling equipment used, for a period not to exceed ninety (90) days, to establish the proper design of a permanent fluid handling facility for an oil or gas producing property, provided that all emissions to the atmosphere other than stock tank vapors be flared.
Pursuant to Section 3.27(a) of the Texas Clean Air Act, authority to construct and permit to operate shall not be required for the following repairs or changes to existing facilities:
1. Structural changes which cannot change the quality, nature or quantity of air contaminant emissions.
2. Repairs or maintenance not involving structural changes.
3. Identical replacement in whole
or in part of any article, machine or any other contrivance.
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