1 Well Rework Program at Pier J within THUMS Long Beach Operating Areas

THUMS Long Beach Co. is authorized by the California Department of Conservation, Geologic Energy Management Division (CalGEM) to perform a rework of a specific waterflood well, identified as J-339 I (API #0403720010), located at Pier J within the Wilmington Oil Field in Los Angeles. The primary objective of the project is to address well integrity issues to protect natural resources and the environment. The scope of work specifically requires repairing the casing of the existing wellbore by running and setting a casing patch, after which the well will be returned to its existing use. The project is governed by the CalGEM rework exemptions guidance document published in December 2023, falling under Group B. It has been granted a Notice of Exemption from full environmental review under the California Environmental Quality Act (CEQA), citing multiple categorical exemptions including existing facilities, replacement or reconstruction, and minor alterations to land. The project is mandated to remain consistent with all statutory and regulatory provisions protecting public health, safety, and the environment. The official certification for this program was issued on July 21, 2026.