The purpose of this Question and Answer (Q&A) document is to provide an answer to an inquiry EPA received on how to streamline the process of requesting and making impracticability determinations for “group 1 furnaces” under 40 CFR, part 63, subpart RRR: National Emission Standards for Hazardous Air Pollutants for Secondary Aluminum Production. The EPA is posting a response to this inquiry to ensure a timely review of these requests and the associated determinations. 

Also included are the historical correspondence letters between Kaiser Aluminum and EPA Region 10.

• Q&A - Secondary Aluminum (PDF)(5 pp, 144 K, 6/22/2020)
• Kaiser petition for impracticability determination (PDF)(11 pp, 2 MB, 8/19/2016)
  Impracticability determination request
• Follow up letter from Kaiser on their petition for impracticability determination (PDF)(2 pp, 97 K, 11/9/2016)
  Response letter from Kaiser to EPA Region 10 with requested additional information on the impracticability determination.
• First response letter from EPA Region 10 (PDF)(3 pp, 667 K, 2/8/2018)
  Response letter from EPA Region 10 on the impracticability determination request from Kaiser.
• Second response letter from EPA Region 10 (PDF)(3 pp, 168 K, 7/17/2018)
  Response letter from EPA Region 10 on the impracticability determination request from Kaiser.
• Kaiser's response letter to EPA Region 10 (PDF)(3 pp, 933 K, 1/10/2019)
  Response letter from Kaiser to EPA Region 10 on the impracticability determination.
• Third response letter from EPA Region 10 (PDF)(4 pp, 82 K, 4/9/2019)
  Response letter from EPA Region 10 on the impracticability determination request from Kaiser.