Section 440.42. Coal preparation plants.

 

(1)   Applicability and designation of affected facility.

(a) The provisions of this section are applicable to any of the following affected facilities in coal preparation plants which process more than 181 Mg (200 tons) per day: thermal dryers, pneumatic coal-cleaning equipment (air tables), coal processing and conveying equipment (including breakers and crushers), coal storage systems and coal transfer and loading systems.

(b) Any facility under par. (a) that commences construction or modification after October 24, 1974, is subject to the requirements of this section.

(2)   Definitions. As used in this section, terms not defined in this subsection have the meanings given in s. NR 440.02 .

(a) "Bituminous coal" means solid fossil fuel classified as bituminous coal by ASTM D388-99 (reapproved 2004), incorporated by reference in s. NR 440.17 (2) (a) 12.

(b) "Coal" means all solid fossil fuels classified as anthracite, bituminous, subbituminous or lignite by ASTM D388-99 (reapproved 2004), incorporated by reference in s. NR 440.17 (2) (a) 12.

(c) "Coal preparation plant" means any facility, excluding underground mining operations, which prepares coal by one or more of the following processes: breaking, crushing, screening, wet or dry cleaning and thermal drying.

(d) "Coal processing and conveying equipment" means any machinery used to reduce the size of coal or to separate coal from refuse, and the equipment used to convey coal to or remove coal and refuse from the machinery. This includes, but is not limited to, breakers, crushers, screens and conveyor belts.

(e) "Coal storage system" means any facility used to store coal except for open storage piles.

(f) "Cyclonic flow" means a spiraling movement of exhaust gases within a duct or stack.

(g) "Pneumatic coal-cleaning equipment" means any facility which classifies bituminous coal by size or separates bituminous coal from refuse by application of one or more air streams.

(h) "Thermal dryer" means any facility in which the moisture content of bituminous coal is reduced by contact with a heated gas stream which is exhausted to the atmosphere.

(i) "Transfer and loading system" means any facility used to transfer and load coal for shipment.

(3)   Standards for particulate matter.

(a) On and after the date on which the performance test required to be conducted by s. NR 440.08 is completed, an owner or operator subject to the provisions of this section may not cause to be discharged into the atmosphere from any thermal dryer gases which:

1. Contain particulate matter in excess of 0.070 g/dscm (0.031 gr/dscf).

2. Exhibit 20% opacity or greater.

(b) On and after the date on which the performance test required to be conducted by s. NR 440.08 is completed, an owner or operator subject to the provisions of this section may not cause to be discharged into the atmosphere from any pneumatic coal cleaning equipment gases which:

1. Contain particulate matter in excess of 0.040 g/dscm (0.017 gr/dscf).

2. Exhibit 10% opacity of greater.

(c) On and after the date on which the performance test required to be conducted by s. NR 440.08 is completed, an owner or operator subject to the provisions of this section may not cause to be discharged into the atmosphere from any coal processing and conveying equipment, coal storage system, or coal transfer and loading system processing coal gases which exhibit 20% opacity or greater.

(4)   Monitoring of operations.

(a) The owner or operator of any thermal dryer shall install, calibrate, maintain and continuously operate monitoring devices as follows:

1. A monitoring device for the measurement of the temperature of the gas stream at the exit of the thermal dryer on a continuous basis. The monitoring device shall be certified by the manufacturer to be accurate within " 1.7 ° C ( " 3 ° F).

2. For affected facilities that use venturi scrubber emission control equipment:

a. A monitoring device for the continuous measurement of the pressure loss through the venturi constriction of the control equipment. The monitoring device shall be certified by the manufacturer to be accurate within plus or minus one inch water gauge.

b. A monitoring device for the continuous measurement of the water supply pressure to the control equipment. The monitoring device shall be certified by the manufacturer to be accurate within " 5% of design water supply pressure. The pressure sensor or tap shall be located close to the water discharge point. The department may approve alternative locations.

(b) All monitoring devices under par. (a) shall be recalibrated annually in accordance with procedures under s. NR 440.13 (2) .

(5)   Test methods and procedures.

(a) In conducting the performance tests required in s. NR 440.08 , the owner or operator shall use as reference methods and procedures the test methods in Appendix A of 40 CFR part 60 , incorporated by reference in s. NR 440.17 , or other methods and procedures as specified in this subsection, except as provided in s. NR 440.08 (2) .

(b) The owner or operator shall determine compliance with the particulate matter standards in sub. (3) as follows:

1. Method 5 shall be used to determine the particulate matter concentration. The sampling time and sample volume for each run shall be at least 60 minutes and 0.85 dscm (30 dscf). Sampling shall begin no less than 30 minutes after startup and shall terminate before shutdown procedures begin.

2. Method 9 and the procedures in s. NR 440.11 shall be used to determine opacity.

History: Cr. Register, January, 1984, No. 337 , eff. 2-1-84; am. (2) (intro.), Register, September, 1990, No. 417 , eff. 10-1-90; am. (4) (b), r. and recr. (5), Register, July, 1993, No. 451 , eff. 8-1-93; CR 06-109 : am. (1) (a), (2) (a) and (b), (3) (b) 1., (4) (a) 1. and (5) (b) (intro.) Register May 2008 No. 629 , eff. 6-1-08.