TARGA RESOURCES OPERATING LLC — Warning Letter

42026026WL_Warning Letter_03102026_(25-329593)_text.pdf, page 1Official PDFU.S. Department of Transportation Pipeline and Hazardous Materials Safety Administration 8701 S. Gessner, Suite 630 Houston TX 77074 WARNING LETTER VIA ELECTRONIC MAIL TO: mmeloy@targaresources.com March 10, 2026 Matthew Meloy Chief Executive Officer Targa Resources Operating LLC 811 Louisiana St Suite 2100 Houston, Texas, 77002 CPF 4-2026-026-WL Dear Mr. Meloy: From April 7 through September 25, 2025, representatives of the Pipeline and Hazardous Materials Safety Administration (PHMSA), Office of Pipeline Safety (OPS), pursuant to Chapter 601 of Title 49, United States Code (U.S.C.), inspected Targa Resources Operating LLC’s (Targa) natural gas liquids pipeline system located in Louisiana, New Mexico, Oklahoma, and Texas. As a result of the inspection, it is alleged that Targa has committed a probable violation of the Pipeline Safety Regulations, Title 49, Code of Federal Regulations (CFR). The item inspected and the probable violation is: 1. § 195.402 Procedural manual for operations, maintenance, and emergencies. (a) General. Each operator shall prepare and follow for each pipeline system a manual of written procedures for conducting normal operations and maintenance activities and handling abnormal operations and emergencies. This manual shall be reviewed at intervals not exceeding 15 months, but at least once each calendar year, and appropriate changes made as necessary to insure that the manual is effective. This manual shall be prepared before initial operations of a pipeline system commence, and appropriate parts shall be kept at locations where operations and maintenance activities are conducted.#

42026026WL_Warning Letter_03102026_(25-329593)_text.pdf, page 2Targa failed to follow its procedure for conducting normal operations in accordance with § 195.402(a). Specifically, Targa failed to follow its procedure Environmental, Safety, and Health (ES&H) Manual: Safe Work Permits (rev. 01/11/2022), which requires the completion and approval of a hot work permit prior to performing any work that could generate sparks or fire, including, but not limited to, welding, cutting, grinding, brazing, torch or plasma cutting, abrasive blasting, fusing plastic pipe, or using hot plates or inductive heating elements. Following receipt of Accident Report No. 20230139-38218, dated June 29, 2023, PHMSA reviewed records for the pipe repair/replacement on Targa’s 20-inch GPX-F East Chico to Weatherford pipeline segment. When PHMSA requested a copy of the approved hot work permit for the activity described, Targa was unable to locate one. Hot work permit processes are designed to ensure that all required safety measures, including verification that all hazard mitigation measures are in place, assignment and documentation of a designated fire watch, atmospheric monitoring for oxygen levels and flammable vapors both prior to and during the work, and identification of the specific work location, equipment to be used, and the authorized dates for hot-work activities, are implemented before work begins. Failing to follow such a process increases the risk of fire or explosion, injury to personnel, and environmental release. Therefore, Targa failed to follow its procedure for conducting normal operations in accordance with § 195.402(a). Under 49 U.S.C. § 60122 and 49 CFR § 190.223, you are subject to a civil penalty not to exceed $272,926 per violation per day the violation persists, up to a maximum of $2,729,245 for a related series of violations. For violation occurring on or after December 28, 2023, and before December 30, 2024, the maximum penalty may not exceed $266,015 per violation per day the violation persists, up to a maximum of $2,660,135 for a related series of violations. For violation occurring on or after January 6, 2023, and before December 28, 2023, the maximum penalty may not exceed $257,664 per violation per day the violation persists, up to a maximum of $2,576,627 for a related series of violations. For violation occurring on or after March 21, 2022, and before January 6, 2023, the maximum penalty may not exceed $239,142 per violation per day the violation persists, up to a maximum of $2,391,142 for a related series of violations. For violation occurring on or after May 3, 2021, and before March 21, 2022, the maximum penalty may not exceed $225,134 per violation per day the violation persists, up to a maximum of $2,251,334 for a related series of violations. For violation occurring on or after January 11, 2021, and before May 3, 2021, the maximum penalty may not exceed $222,504 per violation per day the violation persists, up to a maximum of $2,225,034 for a related series of violations. For violation occurring on or after July 31, 2019, and before January 11, 2021, the maximum penalty may not exceed $218,647 per violation per day the violation persists, up to a maximum of $2,186,465 for a related series of violations. 2#

42026026WL_Warning Letter_03102026_(25-329593)_text.pdf, page 3We have reviewed the circumstances and supporting documents involved in this case and have decided not to conduct additional enforcement action or penalty assessment proceedings at this time. We advise you to correct the item identified in this letter. No reply to this letter is required. If you choose to reply, in your correspondence please refer to CPF 4-2026-026-WL. Be advised that all material you submit in response to this enforcement action is subject to being made publicly available. If you believe that any portion of your responsive material qualifies for confidential treatment under 5 U.S.C. § 552(b), along with the complete original document you must provide a second copy of the document with the portions you believe qualify for confidential treatment redacted and an explanation of why you believe the redacted information qualifies for confidential treatment under 5 U.S.C. § 552(b). Sincerely, Bryan Lethcoe Director, Southwest Region, Office of Pipeline Safety Pipeline and Hazardous Materials Safety Administration cc: Gregg Johnson, Director, Pipeline Compliance, Targa Resources Operating LLC gjohnson@targaresources.com Kyle Kubin, Sr. Vice President, Operations & Engineering, Targa Resources, LLC, kkubin@targaresources.com 3#