Section 58.01.01.750 - RULES FOR CONTROL OF FLUORIDE EMISSIONSThis section prevents the emission of fluorides such that the accumulation of fluorine in feed and forage for livestock does not exceed the safe limits specified below. (3-28-23)
01.Emission Limitations -- Phosphate Fertilizer Plants. No person may allow, suffer, cause or permit the discharge into the atmosphere of total fluoride emissions in gaseous and in particulate form, expressed as fluoride (F-), from the phosphate fertilizer plant sources listed in Subsection 750.03 in excess of thirty hundredths (0.30) pounds of fluoride per ton of P2O5 input to the calciner operation, calculated at maximum rated capacity. (3-28-23)02.Monitoring, Testing, and Reporting Requirements. Compliance with Subsection 750.01 will be adjudged upon the results of the continuing program of fluoride sampling of potential grazing areas and alfalfa growing areas required by the Department. Sampling conducted by any person subject to Section 750 will be accepted for determining compliance with Subsection 750.01 if such sampling is conducted at sites approved by the Department in advance of sampling, using analytical procedures appearing in the Procedures Manual for Air Pollution Control, Section I (Source Test Methods) or equivalent methods approved by the Department in advance of sampling. Compliance with Subsection 750.01 must be demonstrated by testing methods approved in advance by the Department. When approved by the Department in advance of sampling, engineering calculations may be submitted in lieu of emission data. Monitoring and reporting requirements will be included in operating permits granted to each facility. (3-28-23)03.Source Specific Permits. To assure compliance with Subsection 750.01, the Department will specify methods for calculating total allowable emissions and issue source specific permits containing emission limitations for the following sources within phosphate fertilizer plants: (3-28-23) a. Calciner operation; and (3-28-23)b. Wet phosphoric acid plants; and (3-28-23)c. Super phosphoric acid production; and (3-28-23)d. Diammonium phosphate plants; and (3-28-23)e. Monoammonium phosphate production; and (3-28-23)f. Triple super phosphate (mono calcium phosphate) production. (3-28-23)04.Exemptions. The provisions of Subsections 750.01, 750.02, and 750.03 do not apply to any phosphate fertilizer facility that produces mono ammonium phosphate exclusively if no animal feed is grown or if no animal grazing occurs or if the animal feed and forage meets the ambient air quality standards for fluorides specified in Section 577 within a three (3) mile radius of such facility. This exemption only applies if the owner or operator of the facility, on an annual basis: (3-28-23) a. Conducts a fluoride sampling program of potential grazing areas at locations approved in advance of sampling by the Department, using analytical techniques appearing in the Procedures Manual for Air Pollution Control, Section I (Source Test Methods); and (3-28-23)b. Submits the results of such sampling program to the Department as soon as they become available. (3-28-23)Idaho Admin. Code r. 58.01.01.750