PURPOSE: This rule establishes the maximum allowable rate of total fluoride emissions from any diammonium phosphate fertilizer production facility in the outstate Missouri area.

PUBLISHER’S NOTE: The publication of the full text of the material that the adopting agency has incorporated by reference in this rule would be unduly cumbersome or expensive. Therefore, the full text of that material will be made available to any interested person at both the Office of the Secretary of State and the office of the adopting agency, pursuant to section 536.031.4, RSMo. Such material will be provided at the cost established by state law. (1) Application. This rule shall apply throughout Missouri except in the City of St. Louis and St. Charles, St. Louis, Jefferson, Franklin, Clay, Cass, Buchanan, Ray, Jackson, Platte and Greene Counties.

1. (2) Maximum Allowable Emission of Total Fluoride From the Production of Diam - monium Phosphate Fertilizer. The maximum emission of total fluoride from the production of diammonium phosphate fertilizer shall not exceed 0.030 grams per kilogram of phosphorous pentoxide input to the process (0.06 lb/ton).
2. (3) Time Schedules for Compliance. All sources subject to subsection (2)(A) of this rule shall be in compliance within eighteen
3. (18) months (June 11, 1980) of the effective date of this rule December 11, 1978.

4. (4) Monitoring of Operations.

   1. (A) Any facility subject to this rule shall install, calibrate, maintain and operate a monitoring device which can be used to determine the mass flow of phosphorousbearing feed material to the diammonium phosphate process and a monitoring device which continuously measures and permanently records the total pressure drop across the process scrubbing system. These devices shall have an accuracy of plus or minus five percent (±5%) over their operating range.
   2. (B) Any facility subject to this rule shall maintain a daily record of equivalent phosphorous pentoxide feed to the diammonium phosphate process by determining the total mass rate in metric ton/hour of phosphorousbearing feed using a monitoring device for measuring mass flow rate which meets the requirements of subsection (4)(A) of this rule and by following the procedure described in subsection (5)(A).
   3. (C) 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.

5. (5) Determination of Equivalent Phosphorous Pentoxide Feed and Total Fluoride Emissions.

   1. (A) Equivalent phosphorous pentoxide feed at the affected facility shall be determined as follows:

      1. 1. Determine the total mass rate in met-

ric ton/hour of phosphorous-bearing feed using a flow monitoring device meeting the requirements of subsection (4)(A);

1. 2. Calculate the equivalent phosphorous

pentoxide feed by multiplying the percentage phosphorous pentoxide content, as measured 10 CSR 10-3

by the spectrophotometric molybdovana - dophosphate method (AOAC Method 9) times the total mass rate of phosphorous-bearing feed. AOAC Method 9 is published in the Official Methods of Analysis of the Association of Official Analytical Chemists, 11th edition, 1970, pp. 11 and 12. Other methods may be approved by the director of the Department of Natural Resources.

1. (B) Determination of Total Fluoride Emissions. For each run, total fluoride emissions expressed as g/metric tons of equivalent phosphorous pentoxide feed shall be determined using the following equation:

   E = (CsQs) 10-3 MP2O5

Where: E = emissions of total fluoride in g/metric ton of equivalent phosphorous pentoxide feed; Cs = concentration of total fluorides in mg/dscm as determined by 10 CSR 10-6.030(13); Qs = volumetric flow rate of the effluent gas stream in dscm/hour as determined by 10 CSR 10- 6.030(2); 10-3 = Conversion factor for mg to g; and = Equivalent phosphorous pentoxide MP2O5 feed in metric ton/hour as determined by paragraph.

1. (6) Performance Testing. Any facility subject to this regulation shall have a performance test conducted on the diammonium phosphate process at the facility according to the procedure described in 10 CSR 10-6.030(13) within twenty-one (21) months after December 11, 1978 (September 11, 1980).

AUTHORITY: section 643.050, RSMo 1986.* Original rule filed Feb. 27, 1978, effective Dec. 11, 1978. *Original authority: 643.050, RSMo 1965, amended 1972, 1992.