NEWS RELEASE CONTACT: Meghan Cox Manager Corporate Communications T – (412) 433-6777 E – mmcox@uss.com FOR IMMEDIATE RELEASE U. S. STEEL ISSUES STATEMENT ON ALLEGHENY COUNTY HEALTH DEPARTMENT ENFORCEMENT ORDER PITTSBURGH, March 1, 2019 – Today, United States Steel Corporation (NYSE: X) issued the following statement regarding the February 28 Enforcement Order issued by the Allegheny County Health Department. The company’s statement follows. “Since the December 24th fire at our Clairton facility, our focus has been on minimizing the impact to the environment and community while rebuilding safely and quickly. We initiated multiple actions to minimize environmental impacts, and we have welcomed and implemented multiple operational adjustments requested by the Allegheny County Health Department (ACHD) to help mitigate the environmental impact resulting from the fire-damaged equipment.” “Despite the efforts by U. S. Steel to work cooperatively, the ACHD yesterday issued a unilateral Enforcement Order containing a number of requirements intended to take effect within one day of receipt of the Order. Upon receipt of the Order, we quickly reviewed its requirements to determine the steps necessary to comply. Unfortunately, the Order included required actions and deadlines that would place the safety of our employees and local communities at risk. We have begun making preparations to implement certain ordered actions to further extend coking times. However, we cannot extend those times on the schedule set forth in the Order without jeopardizing the safety of workers and the community, and also negatively affecting the Clairton Plant’s environmental compliance.” “We are committed to correcting the damage caused by the fire and completing equipment repairs within the next 8-9 weeks that will allow us to restart the environmental controls that will return our plant to compliance. We are disappointed the ACHD has issued another unilateral order rather than working to resolve environmental issues through communication and cooperation. As a result, we are forced to raise our concerns by appealing this Order that places workers’ safety at risk and would worsen environmental performance. While this appeal was necessary, we welcome an opportunity to meet with the ACHD to resolve these issues and deadlines without protracted litigation.” “Safety is a core value at U. S. Steel and has remained at the forefront of our repair and mitigation efforts. We wish to resolve these issues to ensure the safety of our employees and the community.” -oOo- ©2019 U. S. Steel. All Rights Reserved www.ussteel.com NEWS RELEASE United States Steel Corporation, headquartered in Pittsburgh, Pa., is a leading integrated steel producer and Fortune 250 company with major operations in the United States and Central Europe. For more information about U. S. Steel, please visit www.ussteel.com. ©2019 U. S. Steel. All Rights Reserved www.ussteel.com