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)(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.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)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)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)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)5.
5. From any ground phosphate rock handling and storage system any gases which exhibit greater than zero percent opacity.
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:
NR 440.54(4)(c)1.
1. A monitoring device for the continuous measurement of the pressure loss of the gas stream through the scrubber. The monitoring device shall be certified by the manufacturer to be accurate within
"250 pascals (
"one inch water) gauge pressure.
NR 440.54(4)(c)2.
2. A monitoring device for the continuous measurement of the scrubbing liquid supply pressure to the control device. The monitoring device shall be accurate within
" 5% of design scrubbing liquid supply pressure.
NR 440.54(4)(d)
(d) For the purpose of conducting a performance test under
s. NR 440.08, the owner or operator of any phosphate rock plant subject to the provisions of this section shall install, calibrate, maintain and operate a device for measuring the phosphate rock feed to any affected dryer, calciner or grinder. The measuring device used shall be accurate to within
" 5% of the mass rate over its operating range.
NR 440.54(4)(e)
(e) For the purpose of reports required under
s. NR 440.07 (3), periods of excess emissions that shall be reported are defined as all 6-minute periods during which the average opacity of the plume from any phosphate rock dryer, calciner or grinder subject to
par. (a) exceeds the applicable opacity limit.
NR 440.54(4)(f)
(f) Any owner or operator subject to the requirements under
par. (c) shall report on a frequency specified in
s. NR 440.07 (3) all measurement results that are less than 90% of the average levels maintained during the most recent performance test conducted under
s. NR 440.08 in which the affected facility demonstrated compliance with the standard under
sub. (3).
NR 440.54(5)(a)(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 for in
s. NR 440.08 (2).
NR 440.54(5)(b)
(b) The owner or operator shall determine compliance with the particulate matter standards in
sub. (3) as follows:
where:
E is the emission rate of particulate matter kg/Mg (lb/ton) of phosphate rock feed
cs is the concentration of particulate matter, g/dscm (g/dscf)
Qsd is the volumetric flow rate of effluent gas, dscm/hr (dscf/hr)
P is the phosphate rock feed rate, Mg/hr (ton/hr)
K is the conversion factor, 1000 g/kg (453.6 g/lb)
NR 440.54(5)(b)2.
2. Method 5 shall be used to determine the particulate matter concentration -
See PDF for diagram 
and volumetric flow rate (Q
sd) of the effluent gas. The sampling time and sample volume for each run shall be at least 60 minutes and 0.85 dscm (30 dscf).
NR 440.54(5)(b)3.
3. The device of
sub. (4) (d) shall be used to determine the phosphate rock feed rate (P) for each run.
NR 440.54(5)(c)
(c) To comply with
sub. (4) (f), if applicable, the owner or operator shall use the monitoring devices in
sub. (4) (c) 1. and
2. to determine the average pressure loss of the gas stream through the scrubber and the average scrubbing supply pressure during the particulate matter runs.
NR 440.54 History
History: Cr.
Register, January, 1984, No. 337, eff. 2-1-84; am. (2) (intro.) and (3) (a) 1. a.,
Register, September, 1990, No. 417, eff. 10-1-90; r. and recr. (5),
Register, July, 1993, No. 451, eff. 8-1-93;
CR 06-109: am. (4) (f) Register May 2008 No. 629, eff. 6-1-08. NR 440.55
NR 440.55 Ammonium sulfate manufacture. NR 440.55(1)(1)
Applicability and designation of affected facility. NR 440.55(1)(a)(a) The affected facility to which the provisions of this section apply is each ammonium sulfate dryer within an ammonium sulfate manufacturing plant in the caprolactam by-product, synthetic and coke oven by-product sectors of the ammonium sulfate industry.
NR 440.55(1)(b)
(b) Any facility under
par. (a) that commences construction or modification after February 4, 1980, is subject to the requirements of this section.
NR 440.55(2)
(2) Definitions. As used in this section, terms not defined in this subsection have the meanings given in
s. NR 440.02.
NR 440.55(2)(a)
(a) “Ammonium sulfate dryer" means a unit or vessel into which ammonium sulfate is charged for the purpose of reducing the moisture content of the product using a heated gas stream. The unit includes foundations, super-structure, material charger systems, exhaust systems and integral control systems and instrumentation.
NR 440.55(2)(b)
(b) “Ammonium sulfate feed material streams" means the sulfuric acid feed stream to the reactor/crystallizer for synthetic and coke oven by-product ammonium sulfate manufacturing plants; and means the total or combined feed streams (the oximation ammonium sulfate stream and the rearrangement reaction ammonium sulfate stream) to the crystallizer stage, prior to any recycle streams.
NR 440.55(2)(c)
(c) “Ammonium sulfate manufacturing plant" means any plant which produces ammonium sulfate.
NR 440.55(2)(d)
(d) “Caprolactam by-product ammonium sulfate manufacturing plant" means any plant which produces ammonium sulfate as a by-product from process streams generated during caprolactam manufacture.
NR 440.55(2)(e)
(e) “Coke oven by-product ammonium sulfate manufacturing plant" means any plant which produces ammonium sulfate by reacting sulfuric acid with ammonia recovered as a by-product from the manufacture of coke.
NR 440.55(2)(f)
(f) “Synthetic ammonium sulfate manufacturing plant" means any plant which produces ammonium sulfate by direct combination of ammonia and sulfuric acid.
NR 440.55(3)
(3) Standards for particulate matter. On or after the date on which the performance test required to be conducted by
s. NR 440.08 is completed, no owner or operator of an ammonium sulfate dryer subject to the provisions of this section may cause to be discharged into the atmosphere, from any ammonium sulfate dryer, particulate matter at an emission rate exceeding 0.15 kilogram of particulate per megagram of ammonium sulfate produced (0.30 pound of particulate per ton of ammonium sulfate produced) and exhaust gases with greater than 15% opacity.
NR 440.55(4)(a)(a) The owner or operator of any ammonium sulfate manufacturing plant subject to the provisions of this section shall install, calibrate, maintain and operate flow monitoring device which can be used to determine the mass flow of ammonium sulfate feed material streams to the process. The flow monitoring device shall have an accuracy of
"5% over its range. However, if the plant uses weight scales of the same accuracy to directly measure production rate of ammonium sulfate, the use of flow monitoring devices is not required.
NR 440.55(4)(b)
(b) The owner or operator of any ammonium sulfate manufacturing plant subject to the provisions of this section shall install, calibrate, maintain and operate a monitoring device which continuously measures and permanently records the total pressure drop across the emission control system. The monitoring device shall have an accuracy of
" 5% over its operating range.
NR 440.55(5)(a)(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
s. NR 440.08 (2).
NR 440.55(5)(b)
(b) The owner or operator shall determine compliance with the particulate matter standards in
sub. (3) as follows:
where:
E is the emission rate of particulate matter, kg/Mg (lb/ton) of ammonium sulfate produced
cs is the concentration of particulate matter, g/dscm (g/dscf)
Qsd is the volumetric flow rate of effluent gas, dscm/hr (dscf/hr)
P is the production rate of ammonium sulfate, Mg/hr (ton/hr)
K is the conversion factor, 1000 g/kg (453.6 g/lb)
NR 440.55(5)(b)2.
2. Method 5 shall be used to determine the particulate matter concentration -
See PDF for diagram and volumetric flow rate (Q
sd) of the effluent gas. The sampling time and sample volume for each run shall be at least 60 minutes and 1.50 dscm (53 dscf).
NR 440.55(5)(b)3.
3. Direct measurement using product weigh scales, or the results of computations using a material balance, shall be used to determine the rate (P) of the ammonium sulfate production. If production rate is determined by material balance, the following equations shall be used:
P = ABCK′
where:
A is the sulfuric acid flow rate to the reactor/crystallizer averaged over the time period taken to conduct the run, liter/min
B is the acid density (a function of acid strength and temperature), g/cc
C is the acid strength, decimal fraction
K′ is the conversion factor, 0.0808 (Mg-min-cc)/(g-hr-liter) [0.0891 (ton- min-cc)/(g-hr-liter)]
P = DEFK,
where:
D is the total combined feed stream flow rate to the ammonium crystallizer before the point where any recycle streams enter the stream averaged over the time period taken to conduct the test run, liter/min
E is the density of the process stream solution, g/liter
F is the percent mass of ammonium sulfate in the process solution, decimal fraction
K, is the conversion factor, 6.0 10-5 (Mg-min)/(g-hr) [6.614 10-5 (ton-min)/g-hr)]
