NR 440.54(1)(a) (a) The provisions of this section are applicable to the following affected facilities used in phosphate rock plants which have a maximum plant production capacity greater than 3.6 megagrams per hour (4 tons/hr): dryers, calciners, grinders, and ground rock handling and storage facilities, except those facilities producing or preparing phosphate rock solely for consumption in elemental phosphorus production.

NR 440.54(1)(b) (b) Any facility under par. (a) which commences construction, modification or reconstruction after September 21, 1979, is subject to the requirements of this section.

NR 440.54(2) (2) Definitions. As used in this section, terms not defined in this subsection have the meanings given in s. NR 440.02.

NR 440.54(2)(a) (a) “Beneficiation” means the process of washing the rock to remove impurities or to separate size fractions.

NR 440.54(2)(b) (b) “Calciner” means a unit in which the moisture and organic matter of phosphate rock is reduced within a combustion chamber.

NR 440.54(2)(c) (c) “Dryer” means a unit in which the moisture content of phosphate rock is reduced by contact with a heated gas stream.

NR 440.54(2)(d) (d) “Grinder” means a unit which is used to pulverize dry phosphate rock to the final product size used in the manufacture of phosphate fertilizer and does not include crushing devices used in mining.

NR 440.54(2)(e) (e) “Ground phosphate rock handling and storage system” means a system which is used for the conveyance and storage of ground phosphate rock from grinders at phosphate rock plants.

NR 440.54(2)(f) (f) “Phosphate rock feed” means all material entering the process unit including moisture and extraneous material as well as the following ore minerals: fluorapatite, hydroxylapatite, chlorapatite and carbonateapatite.

NR 440.54(2)(g) (g) “Phosphate rock plant” means any plant which produces or prepares phosphate rock product by any or all of the following processes: mining, beneficiation, crushing, screening, cleaning, drying, calcining and grinding.

NR 440.54(3) (3) Standard for particulate matter.

NR 440.54(3)(a) (a) On and after the date on which the performance test required to be conducted by s. NR 440.08 is completed, no owner or operator subject to the provisions of this section may cause to be discharged into the atmosphere:

NR 440.54(3)(a)1. 1. From any phosphate rock dryer any gases which:

NR 440.54(3)(a)1.a. a. Contain particulate matter in excess of 0.030 kilogram per megagram of phosphate rock feed (0.060 lb/ton), or

NR 440.54(3)(a)1.b. b. Exhibit greater than 10% opacity.

NR 440.54(3)(a)2. 2. From any phosphate rock calciner processing unbeneficiated rock or blends of beneficiated and unbeneficiated rock, any gases which:

NR 440.54(3)(a)2.a. a. Contain particulate matter in excess of 0.12 kilogram per megagram of phosphate rock feed (0.23 lb/ton), or

NR 440.54(3)(a)2.b. b. Exhibit greater than 10% opacity.

NR 440.54(3)(a)3. 3. From any phosphate rock calciner processing beneficiated rock any gases which:

NR 440.54(3)(a)3.a. a. Contain particulate matter in excess of 0.055 kilogram per megagram of phosphate rock feed (0.11 lb/ton), or

NR 440.54(3)(a)3.b. b. Exhibit greater than 10% opacity.

NR 440.54(3)(a)4. 4. From any phosphate rock grinder any gases which:

NR 440.54(3)(a)4.a. a. Contain particulate matter in excess of 0.006 kilogram per megagram of phosphate rock feed (0.012 lb/ton), or

NR 440.54(3)(a)4.b. b. Exhibit greater than zero percent opacity.

NR 440.54(3)(a)5. 5. From any ground phosphate rock handling and storage system any gases which exhibit greater than zero percent opacity.

NR 440.54(4) (4) Monitoring of emissions and operations.

NR 440.54(4)(a) (a) Any owner or operator subject to the provisions of this section shall install, calibrate, maintain and operate a continuous monitoring system, except as provided in pars. (b) and (c), to monitor and record the opacity of the gases discharged into the atmosphere from any phosphate rock dryer, calciner or grinder. The span of this system shall be set at 40% opacity.

NR 440.54(4)(b) (b) For ground phosphate rock storage and handling systems, continuous monitoring systems for measuring opacity are not required.

NR 440.54(4)(c) (c) The owner or operator of any affected phosphate rock facility using a wet scrubbing emission control device will not be subject to the requirements in par. (a), but shall install, calibrate, maintain and operate the following continuous monitoring devices: