Wisconsin Administrative Code
Department of Natural Resources
NR 400-499 - Environmental Protection - Air Pollution Control
Chapter NR 440 - Standards of performance for new stationary sources
Subchapter II - Standards of Performance
Section NR 440.41 - Phosphate fertilizer industry: granular triple superphosphate storage facilities

Universal Citation: WI Admin Code § NR 440.41

Current through August 26, 2024

(1) APPLICABILITY AND DESIGNATION OF AFFECTED FACILITY.

(a) The affected facility to which the provisions of this section apply is each granular triple superphosphate storage facility. For the purpose of this section, the affected facility includes any combination of: storage or curing piles, conveyors, elevators, screens and mills.

(b) Any facility under par. (a) that commences construction or modification after October 22, 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) "Equivalent P2O5 stored" means the quantity of phosphorus, expressed as phosphorus pentoxide, being cured or stored in the affected facility.

(b) "Fresh granular triple superphosphate" means granular triple superphosphate produced within the preceding 72 hours.

(c) "Granular triple superphosphate storage facility" means any facility curing or storing fresh granular triple superphosphate.

(d) "Total fluorides" means elemental fluorine and all fluoride compounds as measured by reference methods specified in sub. (5), or equivalent or alternative methods.

(3) STANDARD FOR FLUORIDES.

(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 from any affected facility any gases which contain total fluorides in excess of 0.25 g/hr/Mg of equivalent P2O 5 stored (5.0 Ãƒ- 10-4 lb/hr/ton of equivalent P2O5 stored).

(b) No owner or operator subject to the provisions of this section shall ship fresh granular triple superphospate from an affected facility.

(4) MONITORING OF OPERATIONS.

(a) The owner or operator of any granular triple superphosphate storage facility subject to the provisions of this section shall maintain an accurate account of triple superphosphate in storage to permit the determination of the amount of equivalent P2O5 stored.

(b) The owner or operator of any granular triple superphosphate storage facility subject to the provisions of this section shall maintain a daily record of total equivalent P2O 5 stored by multiplying the percentage P2O5 content, as determined by sub. (5) (c) 3., times the total mass of granular triple superphosphate stored.

(c) The owner or operator of any granular triple superphosphate storage facility 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 any process scrubbing system. The monitoring device shall have an accuracy of "5% over its operating range.

(d) The owner or operator of any granular triple superphosphate storage facility subject to the provisions of this section shall develop for approval by the department a site-specific methodology including sufficient recordkeeping for the purposes of demonstrating compliance with sub. (3) (b).

(5) TEST METHODS AND PROCEDURES.

(a) The owner or operator shall conduct performance tests required in s. NR 440.08 only when the following quantities of products are being cured or stored in the facility.

1. Total granular triple superphosphate is at least 10% of the building capacity and

2. Fresh granular triple superphosphate is at least 6% of the total amount of triple superphosphate, or

3. If the provision in subd. 2. exceeds production capabilities for fresh granular triple superphosphate, fresh granular triple superphosphate is equal to at least 5 days maximum production.

(b) 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).

1. The emission rate (E) of total fluorides shall be computed for each run using the following equation:

See PDF for diagram

where:

E is the emission rate of total fluorides, g/Mg (lb/ton) of equivalent P2O5 stored

Csi is the concentration of total fluorides from emission point "i", mg/dscm (gr/dscf)

Qsdi is the volumetric flow rate of effluent gas from emission point "i", dscm/hr (dscf/hr)

N is the number of emission points associated with the affected facility

P is the equivalent P2O5 stored, Mg/hr (ton/hr)

K is the conversion factor, 1000 mg/g (7000 gr/lb)

2. Method 13A or 13B shall be used to determine the total fluorides concentration (Csi) and volumetric flow rate (Qsdi) of the effluent gas from each of the emission points. The sampling shall be at least 60 minutes and 0.85 dscm (30 dscf).

3. The equivalent P2O5 feed rate (P) shall be computed for each run using the following equation:

See PDF for diagram

where:

Mp is the amount of product in storage, Mg (ton)

Rp is the P2O5 content of product in storage, weight fraction

a. The accountability system of sub. (4) (a) shall be used to determine the amount of product (Mp) in storage.

b. The Association of Official Analytical Chemists (AOAC) Method 9, incorporated by reference in s. NR 440.17, shall be used to determine the P2O5 content (Rp) of the product in storage.

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