Document 3JE1Ka1dy03ZDeXZ6YpgNMzG6

USCA Case #24-1190 Document #2062093 Filed: 06/27/2024 Page 2 of 92 DECLARATION OF DALE E. LEBSACK, JR. IN SUPPORT OF PETITIONERS' MOTION TO STAY FINAL RULE I, Dale E. Lebsack, Jr. hereby declare and state under penalty of perjury that the following is true and correct to the best of my knowledge and is based on my personal knowledge or information available to me in the performance of my official duties. INTRODUCTION 1. My name is Dale E. Lebsack, Jr., and my business address is 1725 Hughes Landing Boulevard, Suite 800, The Woodlands, Texas 77380. I am over the age of 18. I have personal knowledge of the subject matter and am competent to testify concerning the matters in this Declaration. 2. I currently work as President of Talen Montana, LLC ("Talen Montana") and as Chief Fossil Officer for Talen Energy Corporation ("Talen Energy"), its ultimate parent company. As President of' Talen Montana, I am responsible for the day-to-day executive management of Talen Montana's business, properties, and operations. 3. I have worked for Talen Energy and its predecessor companies for over 19 years. Over that time, I have had roles of' increasing responsibility in multiple aspects of fossil power generation, including asset management, plant operations, engineering, environmental, health and safety, and project development. This 1 Sierra Club FOIA 2025-EPA-04883 ED_018388_00000309-00002 SC_EVERSPLIT0006165