Outdated Standard Exemptions 116 - 121, September 13, 1993
(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 contiguously.
(b) Total abrasive usage shall be less than 100 pounds per hour, 500 pounds per day, and five tons per year.
(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 year.
(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 Natural Resource Conservation Commission 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.
(a) Plant capacity shall not exceed 30 cubic yards per hour with mixer size not to exceed 2.5 cubic yards.
(b) All stockpiles are sprinkled with water and/or chemicals as necessary to achieve maximum control of dust emissions.
(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 time.
(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 natural Resource Conservation Commission (TNRCC) and the facility shall be registered with the TNRCC Office of Air Quality in Austin 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 30 TAC Section 116.10(a)(3) and (4) and (b), has been published and documentation thereof has been provided to the TNRCC.
(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 table.
|3000 or more||8|
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 values
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.
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 under 30 TAC Chapter 116.
|Compound||Limit (L) Milligrams per Cubic Meter|
|Beryllium and Compounds||0.0005|
|Butyl Glycidyl Ether||30|
|Chromium and Compounds||0.025|
|Coal Tar Pitch Volatiles||0.1|
|Ethylene Glycol Dinitrate||0.1|
|Fibrous Glass Dust||5|
|Methyl Amyl Ketone||5.8|
|Methyl Butyl Ketone||4|
|Methylenebis (Chloroaniline) MOCA||0.003|
|Methylenebis (Phenyl isocyanate)||0.05|
|Methyl Isoamyl Ketone||5.8|
|Methyl Propyl Ketone||530|
|Nickel, Inorganic Compounds||0.015|
|Phenyl Glycidyl Ether||5|
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.
(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 period.
* 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.
(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 located.
(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 particulate emissions.
(g) There will be no visible emissions at the property line from the facility or equipment.
(h) Before construction of the facility begins, written site approval must be received from the director of the Texas Natural Resource Conservation Commission Office of Air Quality in Austin and the facility shall be registered with that office using Form PI-7.
(a) The mixing vessel shall be horizontal.
(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 scrubber.
(d) There shall be no visible emissions (other than uncombined water).
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