Section 58.01.01.181 - NOTICE AND RECORD-KEEPING OF ESTIMATES OF AMBIENT CONCENTRATIONSSection 181 authorizes facility changes that comply with the terms and conditions establishing the FEC, but that are not included in the estimate of ambient concentration analysis approved for the permit establishing the FEC. No permit revision is required for facility changes implemented in accordance with Section 181. (3-28-23)
01.Notice. For facility changes that comply with the terms and conditions establishing the FEC but are not included in the estimate of ambient concentration analysis approved for the permit establishing the FEC, the permittee must review the estimate of ambient concentration analysis. (3-28-23)a. In the event that the facility change would result in a significant contribution above the design concentration determined by the estimate of ambient concentration analysis approved for the permit establishing the FEC but does not cause or significantly contribute to a violation to any ambient air quality standard, the permittee must provide notice to the Department in accordance with Subsection 181.01.b. (3-28-23)b. Notice procedures. The permittee may make a facility change under Section 181 if the permittee provides written notification to the Department so that the notification is received at least seven (7) days in advance of the proposed change or, in the event of an emergency, the permittee provides the notification so that it is received at least twenty-four (24) hours in advance of the proposed change. For each such change, the written notification must: (3-28-23) i. Describe the proposed change; (3-28-23)ii. Describe and quantify expected emissions; and (3-28-23)iii. Provide the estimated ambient concentration analysis. (3-28-23)02.Recordkeeping. For facility changes that comply with the terms and conditions establishing the FEC but are not included in the estimate of ambient concentration analysis approved for the permit establishing the FEC, the permittee must review the estimate of ambient concentration analysis. In the event the facility change would not result in a significant contribution above the design concentration determined by the estimate of ambient concentration analysis approved for the permit establishing the FEC, the permittee must record and maintain documentation on-site of the review. (3-28-23)03.Estimates of Ambient Concentrations. Estimates of ambient concentrations must be determined during the term of this permit using the same model and model parameters as used with the estimate of ambient concentration analysis approved for the permit establishing the FEC. The permittee must include any changes to the facility that are not included in the originally approved estimate of ambient concentration analysis. (3-28-23)Idaho Admin. Code r. 58.01.01.181