Clicking on a highlighted number below
links you to the standard exemption.
62. Confined feeding operations which
satisfy the following conditions:
(a) Livestock animal feedlots
designed to feed less than 1,000 animals.
(b) Ranged turkey feeding operations,
caged egg laying operations and caged pullet operations designed to
feed less than 20,000 birds when a dry manure handling and storage
system is used.
(c) All housed broiler, pullet,
turkey, breeder hen and egg laying operations when wood shavings or
similar material are used as litter.
(d) All caged egg laying and caged
pullet operations designed to feed more than 20,000 hens when a dry
manure storage and handling system is used and when 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 egg
laying or caged pullet operations. Before construction of the caged
laying and caged pullet begins, written site approval shall be
received from the Executive Director of the Texas Air Control Board
and the facility shall be registered with the appropriate Regional
Office using Form PI-7.
63. Livestock auction sales facilities,
provided the following conditions are satisfied:
(a) All holding pens shall be covered
by a roof.
(b) All traffic areas shall be paved
and cleaned, oiled, or sprinkled with water and/or chemicals as
necessary to achieve maximum control of dust emissions.
(c) Manure shall be cleaned from pens
as necessary to prevent an odor nuisance and disposed of in a
manner which will not create a nuisance.
(d) Dead animals shall be properly
disposed of within 24 hours after death.
(e) The facility shall be located at
least 600 feet from any recreational area or residence or other
structure not occupied or used solely by the owner or operator of
(f) Before construction of the
facility begins, written site approval shall be received from the
Executive Director of the Texas Air Control Board and the facility
shall be registered with the appropriate Regional Office using Form
64. Modifications to feed milling
operations which satisfy the following:
(a) In conjunction with the
installation of additional grain or feed storage silos, including
bins used for loading out finished feed, all materials shall be
transported in a closed conveying system when handled mechanically
or pneumatically. Exhaust air to the atmosphere shall be vented
through 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.
(b) In conjunction with the
installation of a pellet mill/pellet cooler system, the air from
the pellet cooler shall be vented through a high efficiency cyclone
collector which has a cone length at least twice the diameter of
65. Salt water disposal facilities used
to handle aqueous liquid wastes from petroleum production
operations and water injection facilities, provided that the
following conditions are met:
(a) Any facility processing salt
water which emits a sour gas 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.
(b) Any open storage of salt water
shall be operated in such a manner as to prevent the occurrence of
a nuisance condition off-property.
(c) All plant roads and truck loading
and unloading areas must be operated and/or maintained as necessary
to prevent dust emissions from the property which would cause or
contribute to a nuisance condition. Appropriate operating
activities may include reduction of speed of vehicles, use of
alternate routes, and covering of dust-producing loads being
hauled. Appropriate maintenance activities may include watering,
treatment with dust suppressant chemicals, oiling, paving, and
cleaning dust-producing surfaces.
66. Any oil or gas production
facility*, carbon dioxide separation facility*, or oil or gas
pipeline facility* consisting of one or more tanks, separators,
dehydration units, free water knockouts, gunbarrels, heater
treaters, natural gas liquids recovery units, or gas sweetening and
other gas conditioning facilities, including sulfur recovery units
at facilities conditioning produced gas containing less than two
long tons per day of sulfur compounds as sulfur, provided that the
following conditions are met:
(a) Compressors and flares shall meet
the requirements of Standard Exemptions 6 and 80,
(b) Total emissions, including
process fugitives, combustion unit stacks, separator, or other
process vents, tank vents, and loading emissions from all such
facilities constructed at a site under this exemption shall not
exceed 25 tons per year (tpy) each of sulfur dioxide (SO2), all
other sulfur compounds combined, or all volatile organic compounds
(VOC) combined; and 250 tpy each of nitrogen oxide and carbon
monoxide. Emissions of VOC and sulfur compounds other than SO2 must
include gas lost by equilibrium flash as well as gas lost by
(c) Any facility handling sour gas
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.
(d) Total emissions of sulfur
compounds, excluding sulfur oxides, from all vents shall not exceed
4.0 pounds per hour (lb/hr) and the height of each vent emitting
sulfur compounds shall meet the following requirements except in no
case shall the height be less than 20 feet:
|Total as Hydrogen Sulfide,
||Minimum vent height, feet
Note: Other values may be
(e) Before operation begins, facilities handling sour gas shall
be registered with the appropriate Regional Office using Form PI-7
along with supporting documentation that all requirements of this
exemption will be met. For facilities constructed under Standard
Exemption 67, the registration is required before operation under
Standard Exemption 66 can begin. If the facilities cannot meet
Standard Exemption 66, a permit is required prior to continuing
operation of the facilities.
* This exemption applies only to those facilities named above
which handle gases and liquids associated with the production,
conditioning, processing, and pipeline transfer of fluids found in
geologic formations beneath the earth's surface.
67. Temporary separators, tanks,
meters, and fluid-handling equipment used for a period not to
exceed 90 operating days, provided that all the following
conditions are satisfied:
(a) The purpose of the 90-day period
is to test the content of a subsurface stratum believed to contain
oil or gas and/or to establish the proper design of a permanent
(b) Any sour gas produced during this
test period shall be burned in a smokeless flare which meets the
requirements of conditions (a)(4), (b)(1), and (b)(3) of Standard
(c) Total emissions of reduced sulfur
compounds, excluding sulfur oxides, but including hydrogen sulfide,
shall not exceed 4.0 pounds per hour and the emission point height
of any vent of reduced sulfur compounds shall meet the requirements
of Standard Exemption 66(d).
(d) Operation of a facility
authorized by this exemption beyond the 90-day period shall not be
allowed unless such operation is authorized under another Standard
Exemption or is permitted under Section 116.1 or Section
68. Steam, air or inert gas stripping
systems used to strip contaminated ground water or contaminated
soil of chemicals for emergency cleanup reasons or as required by a
government entity, provided the following conditions are
(a) For soil and groundwater
stripping, the total emissions of air contaminants (except
nitrogen, carbon dioxide, air, oxygen and water vapor) do not
exceed five pounds per hour. In addition, for soil stripping,
operations are conducted at least 1,000 feet from any residence or
other structure or any recreational area not occupied or used
solely by the operator or owner of the property on which the
operations are conducted; or
(b) For groundwater or soil
stripping, the stripping gas and the striped vapors are burned in a
combustion device and total emissions of air contaminants (except
nitrogen, carbon dioxide, air, oxygen and water vapor) shall not
exceed five pounds per hour. The combustion device (incinerator,
boiler or heater) shall be operated at 20 percent excess air and
0.5 second of gas retention time in a 1400F or hotter zone. The
stripped vapors maybe burned in a flare only if the flare meets the
requirements of this exemption and standard exemption 80; and
(c) Other compounds also maybe
stripped provided that emissions of specific chemicals meet the
requirements of standard exemption 118(b), (c) and (d).
69. Replacement or addition of cotton
gin stands where no other equipment change or additions are
70. Repairs or maintenance not
involving structural changes where no new or permanent facilities
71. Any permanently or temporarily
located concrete plant* that accomplishes wet batching, dry
batching, or central mixing, and operates in compliance with the
(a) All stockpiles shall be sprinkled
with water and/or dust-suppressant chemicals as necessary to
achieve maximum control of dust emissions.
(b) A mechanism shall be installed on
each bulk storage silo to warn operators when the silo is
(c) All permanent in-plant roads
(batch truck and material delivery truck roads) shall be paved and
cleaned as necessary to achieve maximum control of dust emissions.
Other areas on the property subject to vehicle traffic shall be
watered, treated with dust-suppressant chemicals, oiled, or paved
and cleaned as necessary to achieve maximum control of dust
(d) The cement weigh hopper shall be
vented to its own fabric filter or the central collection system
specified in condition (f).
(e) All bulk storage silos shall be
equipped with fabric filter(s) 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 or shall be vented to the
central collection system specified in condition (f).
(f) The dust emissions at the batch
drop point (drum feed for central mix plants) shall be controlled
by a shroud or other pickup device delivering a minimum of 4,000
actual cubic feet per minute of air to a fabric filter with
automatic air cleaning and a 7.0 ft/min maximum filtering velocity,
or automatic sequenced mechanical cleaning and a 5.25 ft/min
maximum filtering velocity.
(g) All open-bodied vehicles
transporting material from a dry batch plant to the paving mixer(s)
shall be loaded with a final layer of wet sand and/or the truck
shall be covered with a tarp to reduce the emissions of dust to the
minimum level possible under existing conditions.
(h) Unless the plant is to be located
temporarily in or contiguous to the right-of-way of a public works
project, public notice and opportunity for public hearing, as
specified in Section 116.7(b)(2) and (3), must be published and
documentation provided to the Texas Air Control Board (TACB).
(i) Before construction of the
facility begins, written site approval shall be received from the
Executive Director of the TACB, and the facility shall be
registered with the appropriate Regional Office using Form PI-7,
including a current TNRCC Table 20.
* A temporarily located concrete plant produces concrete
exclusively for a designated construction project or occupies a
designated site for no more than 180 consecutive days.
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