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links you to the standard exemption.
116. Automobile restoration
facilities, provided the following conditions are met:
(a) All automobile body/chassis
abrasive blast cleaning and coating operations shall be performed
in a closed building or enclosure; or the facility shall be located
a minimum of 300 feet from any recreational area or residence not
occupied or used solely by the owner of the facility or the owner
of the property upon which the facility is located, except that
structures occupied by security or watch personnel may be located
(b) Total abrasive usage shall be
less than 100 pounds per hour, 500 pounds per day, and five tons
(c) Total cleaning or paint usage,
including solvents used for any cleaning and/or thinning purposes,
shall be less than five gallons per day and 100 gallons per
(d) The owner or operator of the
facility shall maintain daily and annual records of the usage of
all abrasives and coating materials used at the facility, and these
records shall be made available at the request of personnel from
the Texas Air Control Board or any local air pollution control
program having jurisdiction.
These records shall be organized such that the compliance status
of this standard exemption can be readily determined.
117. Any specialty wet batch,
concrete, mortar, grout mixing, or pre-cast concrete products plant
that operates according to the following conditions:
(a) Plant capacity shall not exceed
30 cubic yards per hour with mixer size not to exceed 2.5 cubic
(b) All stockpiles are sprinkled with
water and/or chemicals as necessary to achieve maximum control of
(c) Dust emissions at the batch mixer
feed shall be controlled by a water spray device which eliminates
visible emissions, or a pickup device delivering air to a fabric
filter with automatic air cleaning and a 7.0 feet per minute
(ft/min) maximum filtering velocity, or automatic sequenced
mechanical cleaning and a 5.25 ft/min maximum filtering velocity,
or the entire mixing operation is conducted inside the enclosed
process building such that no visible emissions from the building
occur during mixing activities, or the batch mixer feed is enclosed
such that no visible emissions occur.
(d) Fabric filter(s) with a maximum
filtering velocity of 4.0 ft/min with an acceptable method of
cleaning shall be installed on each storage silo or the silo is
vented to the control collection system.
(e) A visible and/or audible warning
mechanism shall be installed on each silo for warning operators
that the silo is full, so that it will not be overloaded at any
(f) All permanent in-plant roads
(batch truck and material delivery truck roads) are oiled or paved
and cleaned as necessary to achieve maximum control of dust
emissions. Other areas on the property subject to vehicle traffic
shall be oiled or sprinkled with water as necessary to achieve
maximum control of dust emissions.
(g) The transfer of cement from the
storage silo(s) shall be handled through closed conveying systems
with no visible fugitive emissions.
(h) The cement weigh hopper shall be
vented to a control device which eliminates visible emissions, or
shall be vented inside the batch mixer.
(i) Good housekeeping measures shall
be maintained at all times.
(j) Before construction of the
facility begins, written site approval is received from the
Executive Director of the Texas Air Control Board (TACB) and the
facility shall be registered with the appropriate Regional Office
using Form PI-7, including a current Table 20.
(k) Unless the plant is to be located
temporarily in the right-of-way of a public works project, public
notice and opportunity for public hearing, as specified in
116.7(b)(2) and (3), has been published and documentation thereof
has been provided to the TACB.
118. Facilities, or physical or
operational changes to a facility, provided that all of the
following conditions are satisfied:
(a) This exemption shall not be used
to authorize construction or any change to a facility specifically
authorized in another standard exemption, but not meeting the
requirements of that exemption. However, once the requirements of a
specific exemption are met, Exemption 118(c) and (d) may be used to
qualify the use of other chemicals at the facility.
(b) Emission points associated with
the facilities or changes shall be located at least 100 feet from
any off-plant receptor*.
(c) New or increased emissions,
including fugitives, of chemicals shall not be emitted in a
quantity greater than five tons per year nor in a quantity greater
than E as determined using the equation E = L/K and the following
|3000 or more
- E = maximum allowable hourly emission and never to exceed 6
pounds per hour.
- L = value as listed or referenced in Table 118A
- K = value from the table on this page. Interpolate intermediate
- D = distance to the nearest off-plant receptor.
(d) Notification must be provided
using Form PI-7 within 10 days following the installation or
modification of the facilities. The notification shall include a
description of the project, calculations, and data identifying
specific chemical names, L values, D values, and a description of
pollution control equipment, if any.
(e) The facilities in which the
following chemicals will be handled shall be located at least 300
feet from the nearest property line and 600 feet from any off-plant
receptor and the cumulative amount of any of the following
chemicals resulting from one or more authorizations under this
exemption (but not including permit authorizations) shall not
exceed 500 pounds on the plant property and all listed chemicals
shall be handled only in unheated containers operated in compliance
with the United States Department of Transportation regulations (49
Code of Federal Regulations Parts 171 through 178): acrolein,
ammonia, arsine, boron trifluoride, bromine, carbon disulfide,
chlorine, chlorine dioxide, chlorine trifluoride,
chloroacetaldehyde, chloropicrin, chloroprene, diazomethane,
diborane, dimethylhydrazine, ethyl mercaptan, fluorine,
formaldehyde, hydrogen bromide, hydrogen chloride, hydrogen
cyanide, hydrogen fluoride, hydrogen selenide, hydrogen sulfide,
ketene, methylamine, methyl bromide, methylhydrazine, methyl
isocyanate, methyl mercaptan, nickel carbonyl, nitric oxide,
nitrogen dioxide, oxygen difluoride, ozone, pentaborane,
perchloromethyl mercaptan, perchloryl fluoride, phosgene,
phosphine, phosphorus trichloride, selenium hexafluoride, stibine,
liquified sulfur dioxide, sulfur pentafluoride, and tellurium
hexafluoride. Containers of these chemicals may not be vented or
opened directly to the atmosphere at any time.
(f) For physical changes or
modifications to existing facilities, there shall be no changes or
additions of air pollution abatement equipment.
(g) Visible emissions, except
uncombined water, to the atmosphere from any point or fugitive
source shall not exceed 5.0% opacity in any five-minute
* Off-plant receptor means any
recreational area or residence or other structure not occupied or
used solely by the owner or operator of the facilities or the owner
of the property upon which the facilities are located.
Limit Values (L) for Use with Standard Exemption 118
Values included in this table
represent screening levels for determining the applicability of
Standard Exemption 118 and other standard exemptions using the
Exemption 118 equation. The values are not to be interpreted as
acceptable health effects values relative to the issuance of
construction permits, special permits or operating permits under
||Limit (L) Milligrams per Cubic Meter
|Beryllium and Compounds
|Butyl Glycidyl Ether
|Chromium and Compounds
|Coal Tar Pitch Volatiles
|Ethylene Glycol Dinitrate
|Fibrous Glass Dust
|Methyl Amyl Ketone
|Methyl Butyl Ketone
|Methyl Isoamyl Ketone
|Methyl Propyl Ketone
|Nickel, Inorganic Compounds
|Phenyl Glycidyl Ether
The time weighted average Threshold Limit Value (TLV) published
by the American Conference of Governmental Industrial Hygienists
(ACGIH), (1985-1986 Edition) shall be used for compounds not
included in the table. Standard Exemption 118 cannot be used if the
compound is not listed in the table or does not have a published
TLV in the ACGIH.
119. Any feed grinding operation
which is used only for noncommercial purposes.
120. Sawmills processing no more than
25 million board feet, green lumber tally of wood per year, in
which no mechanical drying of lumber is performed and which meet
all of the following provisions:
(a) The mill shall be located at
least 500 feet from any recreational area, school, 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
(b) All in-plant roads and vehicle
work areas shall be watered, oiled, or paved and cleaned as
necessary to achieve maximum control of dust emissions.
(c) All sawmill residues (sawdust,
shavings, chips, bark) from debarking, planing, saw areas, etc.,
shall be removed or contained to minimize fugitive particulate
emissions. Spillage of wood residues shall be cleaned up as soon as
possible and contained such that dust emissions from wind erosion
and/or vehicle traffic are minimized.
(d) All sawmill residues shall be
mechanically conveyed by belts and/or drag chains to a collection
area for disposal or if a pneumatic collection system is utilized,
the air must exhaust to a fabric or cartridge filter with air
cleaning and a filtering velocity no greater than 7.0 ft/min
(air-to-cloth ratio = 7.0), or automatic sequenced mechanical
cleaning and a filtering velocity no greater than 5.0 ft/min
(air-to-cloth ratio = 5.0), or a system found to be equivalent by
the appropriate Regional Office.
(e) Disposal of collected sawmill
residues must be accomplished in a manner which will prevent the
material from becoming airborne. Disposal by means of burning is
prohibited unless it is conducted in an approved incinerator.
(f) All open-bodied vehicles
transporting sawmill residues (sawdust, shavings, chips, bark)
shall be covered with a tarp to achieve maximum control of
(g) There will be no visible
emissions at the property line from the facility or
(h) Before construction of the
facility begins, written site approval must be received from the
director of the appropriate Regional Office and the facility shall
be registered with that office using Form PI-7.
121. Any lime slaking facility used
to mix quicklime with water, provided the following conditions are
(a) The mixing vessel shall be
(b) The mixing vessel shall use
interior mechanical agitation parallel to the bottom and agitate
the water over the full length of the vessel.
(c) Quicklime shall be injected into
the mixing vessel as follows:
- (1) Where injection is from a pneumatic transfer system, the
quicklime shall be injected at a point at least 12 inches under the
surface of the agitated water; or
- (2) Where injection is from a non-pneumatic conveying system
unloading at the top of the vessel, emissions from any vent on the
vessel shall be controlled by an appropriately sized wet
(d) There shall be no visible
emissions (other than uncombined water).
122. Any silo used to store hot mix
asphalt or asphalt emulsion concrete mixtures which meets the
(a) No cutback asphalt mixtures are
(b) For silos on location for more
than six months, all truck traffic areas are paved and cleaned as
necessary to achieve maximum control of dust emissions and for
those silos on location for six months or less, the truck traffic
areas are sprinkled with water and/or chemicals as necessary to
achieve maximum control of dust emissions.
(c) Fuel used for heating the silo is
sweet natural gas as defined in General Rules as adopted by the
Texas Air Control Board or liquid petroleum gas or first run
refinery grade diesel or Number 2 fuel oil that is not a blend
containing waste oils or solvents and that contains less than 0.5%
by weight sulfur.
(d) The silo(s) is located at least
300 feet from any recreational area, school, residence, or other
structure not occupied or used solely by the owner of the property
upon which the silo(s) is located.
(e) Before construction begins,
written site approval is received from the Executive Director of
the Texas Air Control Board and the facility is registered with the
appropriate Regional Office using Form PI-7.
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