R9UIC-CA1-FY23-1: Elk Hills Power LLC, Tupman, CA

Elk Hills Power LLC (EHP) operates a natural gas-fired facility which generates 550 MW of electricity. EHP will construct 6 Class I injection wells that dispose of non-hazardous power plant wastewater into the Lower Tulare Formation within the Elk Hills Oil Field. The UIC permit authorizes continued injection by EHP for a 10-year term. EPA Docket No.EPA-R09-OW-2024-0605.

• EPA Fact Sheet: UIC Class I Permit No. R9UIC-CA1-FY23-1; Elk Hills Power LLC (EHP), Tupman, CA (pdf) (339.6 KB, May 2026)
  Summary of the principal facts and considerations supporting the permit decision for Elk Hills Power LLC, Tupman, California.
• UIC Class I Permit No. R9UIC-CA1-FY23-1: Elk Hills Power LLC, Tupman, CA (pdf) (643.83 KB, May 27, 2026)
  Authorizes operation of six Class I non-hazardous waste injection wells at Elk Hills Power LLC (EHP), Tupman, California.
• Appendices: UIC Permit R9UIC-CA1-FY23-1 (pdf) (26.74 MB, May 2026)
  Permit Appendices for Class I UIC Permit No. R9UIC-CA1-FY23-1 issued to the Elk Hills Power LLC.