Permit modification for hazardous waste management unit ownership change.

Public Notice: US Steel Property Holdings, LLC Department of Toxic Substance Control _____________________________________________________ Public Notice of Class 1* Permit Modification U.S. Steel Property Holdings, LLC owns the hazardous waste management unit located at 900 Loveridge Road in Pittsburg, California. The unit, known as the Waste Management Unit I Corrective Action Management Unit (CAMU), is regulated under a hazardous waste permit issued by the California Department of Toxic Substances Control (DTSC). On March 9, 2026, the facility submitted a Class 1* Permit Modification request to DTSC's Permitting Division in Sacramento to update the permit to reflect a change in ownership from USS UPI, LLC to U.S. Steel Property Holdings, LLC. DTSC has reviewed the submittal and concurs with the pages identified for update within the facility's Permit Application. This permit modification is administrative in nature and does not change the operation, design, or function of the CAMU. The modification updates the owner name on the permit, and U.S. Steel Property Holdings, LLC will continue to perform all required groundwater monitoring, inspections, and maintenance activities associated with the post closure unit. You are receiving this notification because you are on the facility mailing list or have previously expressed interest in updates related to the hazardous waste permit for this site. In accordance with California Code of Regulations, title 22, section 66270.42(a)(1)(B), the facility is required to notify all persons on the mailing list and publish this notice in a local newspaper within seven (7) days of submitting the Class 1* Permit Modification request to DTSC. If you have any questions regarding this permit modification, you may contact the facility representative or DTSC at the contact information below. DTSC Contact: Zackary Knowles, Hazardous Substances Engineer, Zackary.Knowles@dtsc.ca.gov, 916-255-6632 Facility Contact: Markus Boro, Facility Manager, Mboro@USS.com, 925-260-0654 About us: DTSC's mission is to protect California's people, communities, and environment from toxic substances, to enhance economic vitality by restoring contaminated land, and to compel manufacturers to make safer consumer products ECT 6965635 May 1, 2026