Iowa Administrative Code › Agency 567 - Environmental Protection Commission › Title II - Air Quality › Chapter 23 - Air Emission Standards › Rule 567-23.4 - Specific Processes

Current through Register Vol. 47, No. 3, July 24, 2024
(1)
General.
The provisions of this rule shall not apply to those
				facilities for which performance standards are specified in 23.1(2). The
				emission standards specified in this rule shall apply and those specified in
				23.3(2)
"a"
and 23.3(2)
"b"
shall not apply to
				each process of the types listed in the following subrules, except as provided
				below.
Exception: Whenever the director determines that a process
				  complying with the emission standard prescribed in this rule is causing or will
				  cause air pollution in a specific area of the state, the specific emission
				  standard may be suspended and compliance with the provisions of
				  567-23.3 (455B) may be required
				  in such instance.
(2)
Asphalt batching plants.
No person shall cause, allow or
				permit the operation of an asphalt batching plant in a manner such that the
				particulate matter discharged to the atmosphere exceeds 0.15 grain per standard
				cubic foot of exhaust gas.
(3)
Cement kilns.
Cement kilns shall be equipped with air
				pollution control devices to reduce the particulate matter in the gas
				discharged to the atmosphere to no more than 0.3 percent of the particulate
				matter entering the air pollution control device. Regardless of the degree of
				efficiency of the air pollution control device, particulate matter discharged
				from such kilns shall not exceed 0.1 grain per standard cubic foot of exhaust
				gas.
(4)
Cupolas for
				metallurgical melting.
The emissions of particulate matter from all
				new foundry cupolas, and from all existing foundry cupolas with a process
				weight rate in excess of 20,000 pounds per hour, shall not exceed the amount
				specified in 23.3(2)
"a,"
except as provided in 567-Chapter 21.
The emissions of particulate matter from all existing foundry
				  cupolas with a process weight rate less than or equal to 20,000 pounds per hour
				  shall not exceed the amount determined from the table below, except as provided
				  in 567-Chapter 21.
ALLOWABLE EMISSIONS FROM EXISTING SMALL FOUNDRY
				  CUPOLAS
Process weight rate (lb/hr)
Allowable emission (lb/hr)
1,000
3.05
2,000
4.70
3,000
6.35
4,000
8.00
5,000
9.58
6,000
11.30
7,000
12.90
8,000
14.30
9,000
15.50
10,000
16.65
12,000
18.70
16,000
21.60
18,000
23.40
20,000
25.10
(5)
Electric furnaces for metallurgical melting.
The emissions of
				particulate matter to the atmosphere from electric furnaces used for
				metallurgical melting shall not exceed 0.1 grain per standard cubic foot of
				exhaust gas.
(6)
Sand
				handling and surface finishing operations in metal processing.
This
				subrule shall apply to any new foundry or metal processing operation not
				properly termed a combustion, melting, baking or pouring operation. For
				purposes of this subrule, a new process is any process that has not started
				operation, or the construction of which has not been commenced, or the
				components of which have not been ordered or contracts for the construction of
				which have not been let on August 1, 1977. No person shall allow, cause or
				permit the operation of any equipment designed for sand shakeout, mulling,
				molding, cleaning, preparation, reclamation or rejuvenation or any equipment
				for abrasive cleaning, shot blasting, grinding, cutting, sawing or buffing in
				such a manner that particulate matter discharged from any stack exceeds 0.05
				grains per dry standard cubic foot of exhaust gas, regardless of the types and
				number of operations that discharge from the stack.
(7)
Grain handling and processing
				plants.
The owner or operator of equipment at a permanent installation
				for the handling or processing of grain, grain products and grain by-products
				shall not cause, allow or permit the particulate matter discharged to the
				atmosphere to exceed 0.1 grain per dry standard cubic foot of exhaust gas,
				except as follows:
a. The particulate matter
				discharged to the atmosphere from a grain bin vent at a country grain elevator,
				as "country grain elevator" is defined in 567-subrule 22.10(1), shall not
				exceed 1.0 grain per dry standard cubic foot of exhaust gas.
b. The particulate matter discharged to the
				atmosphere from a grain bin vent that was constructed, modified or
				reconstructed before March 31, 2008, at a country grain terminal elevator, as
				"country grain terminal elevator" is defined in 567-subrule 22.10(1), or at a
				grain terminal elevator, as "grain terminal elevator" is defined in 567-subrule
				22.10(1), shall not exceed 1.0 grain per dry standard cubic foot of exhaust
				gas.
c. The particulate matter
				discharged to the atmosphere from a grain bin vent that is constructed or
				reconstructed on or after March 31, 2008, at a country grain terminal elevator,
				as "country grain terminal elevator" is defined in 567-subrule 22.10(1), or at
				a grain terminal elevator, as "grain terminal elevator" is defined in
				567-subrule 22.10(1), shall not exceed 0.1 grain per dry standard cubic foot of
				exhaust gas.