Permit By Rule

01. General Requirement. Owners and operators of dairy farms are deemed to have a permit by rule if they comply with all of the applicable provisions of Sections 760 through 764. Owners and operators of dairy farms subject to Sections 760 through 764 must not operate without obtaining the applicable permit by rule within the time frame specified. (3-28-23) Animal Unit (AU) Basis Drylot Free Stall/Scrape Free Stall/Flush AU (100 t NH3) Threshold No land app 7089 3893 2293 27% volatilization 1 6842 3827 80% volatilization 2 6397 3700 Cow Basis (1400 lbs) Drylot Free Stall/Scrape Free Stall/Flush Total Cows (100 t NH3) Threshold No land app 5063 2781 1638 27% volatilization 1 4887 2733 80% volatilization 2 4569 2643 1 Assumes: Expected level of N->NH3 volatilization for: drop-hose or ground level liquid manure application 2 Assumes: Expected level of N->NH3 volatilization for: center pivot or other conven- tional sprinkler irrigation liquid manure application IDAHO ADMINISTRATIVE CODE IDAPA 58.01.01 Department of Environmental Quality Rules for the Control of Air Pollution in Idaho Section 763 Page 139 02. Optional Permit by Rule. Nothing in Sections 760 through 764 precludes any owner or operator of a dairy farm from requesting and obtaining an air quality permit pursuant to Section 200, nor do Sections 760 through 764 preclude an owner or operator of a dairy farm below the threshold size in Section 761 from complying with Sections 760 through 764 and thereby obtaining a permit by rule. (3-28-23) 03. Exemption. If a dairy farm not subject to Sections 760 through 764 otherwise would become subject to those sections as a result of an emergency, the dairy farm must notify the Department in writing within fourteen (14) days of the emergency. The notification must include an explanation of the emergency circumstances. The dairy farm is exempt from the requirements of Sections 760 through 764 as long as the consequences of the emergency continue (but in no case for more than one (1) year) unless for good cause the Department determines it is appropriate to limit, condition or revoke the exemption. For the purpose of this rule “emergency” is defined as a serious situation or occurrence that happens unexpectedly and demands immediate action. (3-28-23)