Section 1200-03-16-.20 - PHOSPHATE FERTILIZER INDUSTRY: GRANULAR TRIPLE SUPERPHOSPHATE STORAGE FACILITIES(1) Applicability. The provisions of this rule shall apply to each granular triple superphosphate storage facility. For the purpose of this rule, the affected facility includes any combination of storage or curing piles, conveyors, elevators, screens and mills commenced on or after February 9, 1977.
(2) Definitions. (a) "Granular triple superphosphate storage facility" means any facility curing or storing granular triple superphosphate.(b) "Total fluorides" means elemental fluorine and all fluoride compounds as measured by reference methods specified in subparagraph .01(5)(g) of this chapter.(c) "Equivalent P2O5 stored" means the quantity of phosphorus, expressed as phosphorus pentoxide, being cured or stored in the affected facility.(d) "Fresh granular triple superphosphate" means granular triple superphosphate produced no more than 10 days prior to the date of the performance test.(3) Standard for Fluorides. On and after the date on which the performance test required to be conducted by paragraph .01(5) of this chapter is completed, no owner or operator subject to the provisions of this rule shall cause to be discharged into the atmosphere from any affected facility any gases which contain total fluorides in excess of 0.25 g/hr/metric ton of equivalent P2O5 stored (5.0 x 10-4 lb/hr/ton of equivalent P2O5 stored).(4) Monitoring of Operations. The owner or operator of any granular triple superphosphate storage facility subject to the provisions of this rule shall: (a) Maintain an accurate account of triple superphosphate in storage to permit the determination of the amount of equivalent P2O5 stored.(b) Maintain a daily record of total equivalent P2O5 stored by multiplying the percentage P2O5 content, as determined by part (5)(e)(2) of this rule times the total mass of granular triple superphosphate stored.(c) Install, calibrate, maintain, and operate a monitoring device which continuously measures and permanently records the total pressure drop across the process scrubbing system. The monitoring device shall have an accuracy of ±5 percent over its operating range.(5) Test Methods and Procedures. (a) For determining the concentration of total fluorides and the associated moisture content, the sampling time for each run shall be at least 60 minutes and the minimum sample volume shall be at least 0.85 dscm (30 dscf) except that shorter sampling times or smaller volumes, when necessitated by process variables or other factors, may be approved by the Technical Secretary.(b) The air pollution control system for the affected facility shall be constructed so that volumetric flow rates and total fluoride emissions can be accurately determined by applicable test methods and procedures.(c) Except as provided under subparagraph (e) of this paragraph, all performance tests on granular triple superphosphate storage facilities shall be conducted only when the following quantities of product are being cured or stored in the facility: 1. Total granular triple superphosphate - at least 10 percent of the building capacity.2. Fresh granular triple superphosphate - at least 20 percent of the amount of triple superphosphate in the building.(d) If the provisions set forth in part (c)2 of this paragraph exceed production capabilities for fresh granular triple superphosphate, the owner or operator shall have at least five days maximum production of fresh granular triple superphosphate in the building during a performance test.(e) Equivalent P2O5 stored shall be determined as follows:1. Determine the total mass stored during each run using an accountability system meeting the requirements of subparagraph (4)(a) of this rule.2. Calculate the equivalent P2O5 stored by multiplying the percentage P2O5 content, as measured by the spectrophotometric molybdovanadophosphate method (AOAC Method 9), times the total mass stored. AOAC Method 9 is published in the Official Methods of Analysis of the Association of Official Analytical Chemists, 11th edition, 1970, pp. 11-12. Other methods may be approved by the Technical Secretary.(f) For each run, emissions expressed in g/hr/metric ton of equivalent P2O5 stored shall be determined using the following equation: Click to view Image
where:
E = Emissions of total fluorides in g/hr/metric ton of equivalent P2O5 stored.
Cs = Concentration of total fluorides in mg/dscm.
Qs = Volumetric flow rate of the effluent gas stream in dscm/hr.
10-3 = Conversion factor for mg to g.
MP2O5 = Equivalent P2O5 stored in metric tons.
Tenn. Comp. R. & Regs. 1200-03-16-.20
Original rule filed January 10, 1977; effective February 9, 1977. Amendment filed May 17, 1978; effective June 16, 1978.Authority: T.C.A. §§ 68-25-105 and 4-5-202.