Outdated Standard Exemptions 122 - 123, September 13, 1993
(a) No cutback asphalt mixtures are stored;
(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 30 TAC Chapter 101 as adopted by the Texas Natural Resource Conservation Commission (TNRCC) 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 TNRCC and the facility is registered with the TNRCC Office of Air Quality in Austin using Form PI-7.
123.Any new aerospace equipment and parts manufacturing plant, or physical and operational change to an existing aerospace equipment and parts manufacturing plant, provided that the following conditions are satisfied:
(a) For purposes of this exemption, aerospace equipment and parts manufacturing plant means the entire operation on the property which engages in the fabrication or assembly of parts, tools, or completed components of any aircraft, helicopter, dirigible, balloon, missile, drone, rocket, or space vehicle. This exemption will not include composite aerospace equipment and parts manufacturing plants. Composite plants are defined to be plants whose products are less than 50% metal, by weight, based on annual production figures. This definition excludes those operations specifically authorized by other exemptions. For example, a boiler would not be considered a part of the aerospace manufacturing plant, but could be authorized under Standard Exemption Number 7 if all pertinent requirements were met.
(b) Emission points associated with the aerospace equipment and parts manufacturing plant or changes to that plant shall be located at least 100 feet from any off-plant receptor*.
(c) The total annual emissions, in tons per year, of the following air contaminants authorized under this exemption, on a cumulative basis, from the entire aerospace manufacturing plant does not exceed the values specified:
|Inhalable Particulate matter||5 tpy|
|Volatile Organic Compounds (VOC)||15 tpy|
|Acid gases or vapors||5 tpy|
|Non VOC carbon compound emissions||10 tpy|
|Total of all the above air contaminants||25 tpy|
(d) Hourly emissions of total new or increased emissions, including fugitives, of particulate matter or chemicals listed or referenced in Table 118A of Standard Exemption 118 shall not exceed the hourly emission rate, E, as determined using the equation, E = L/K lb/hr and Table 123A, where:
|3000 or more||1|
E = maximum allowable hourly emission, pounds per hour,
L = limit value (see Table 118A), milligrams per cubic meter,
K = value from Table 123A (interpolate intermediate values), and
D = distance to the nearest off-plant receptor from the closest affected emission point.
(e) Before construction or change in operation begins, registration shall be submitted to the Texas Natural Resource Conservation Commission Office of Air Quality in Austin using a completed Form PI-7.
The emission data provided in the PI-7 shall include all process emission sources at the plant, both existing and proposed, and shall be the maximum allowed emissions for permitted units, the actual emissions for existing grandfathered or exempted units, and the projected maximum allowable emissions for proposed units. Emissions shall be speciated by chemical compound and the stack parameters, as appropriate, for each emission source shall be provided.
Registration 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.
(f) An emissions inventory shall be compiled and/or updated on an annual basis for all process emission sources on the property, maintained on a two-year rolling retention cycle, and made available upon request by the Executive Director. The inventory records should include the basis for all emissions estimates, sample calculations, and material usage records. Material and solvent usage records shall be maintained in sufficient detail to document compliance with this standard exemption.
(g) Emissions from each existing and proposed stack, hood, vent, or opening to the atmosphere shall have no visible emissions.
(h) Any facility in which any chemical listed in paragraph (4) of this condition will be handled or stored as a liquid or a compressed gas in a compound mixture of a concentration greater than 10% by weight or an aqueous solution of any chemical listed in (4) greater than 50% by weight shall comply with paragraphs (1)-(3) below:
(1) The facility shall be located at least 300 feet from the nearest property line and 600 feet from any off-plant receptor.
(2) The cumulative amount of any one of the chemicals listed in paragraph (4) of this condition, resulting from one or more authorizations under this exemption, shall not exceed 500 pounds on the plant property.
(3) Any chemical listed in paragraph (4) of this condition shall be handled only in containers operated in compliance with United States Department of Transportation regulations (49 Code of Federal Regulations Parts 171 through 178).
(4) Listed chemicals are: acrolein, ammonia, bromine, carbon disulfide, chlorine, ethyl mercaptan, hydrogen chloride, hydrogen bromide, hydrogen cyanide, hydrogen fluoride, hydrogen sulfide, phosphine, sulfur dioxide, methyl bromide, methyl isocyanate, methyl mercaptan, nickel carbonyl, phosgene.
*Off-plant receptor means any recreational area or residence or other structure not occupied or used solely by the owner or operator of the aerospace equipment and parts manufacturing plant or the owner of the property upon which the aerospace plant is located. Controlled access recreational areas owned by the property owner or the owner or operator of the aerospace plant are not off-plant receptors.
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