EAST CHEYENNE GAS STORAGE, LLC — Notice of Probable Violation

party submissionOfficial PDF32024054NOPV_Operator Response to Notice 09162024_(23-264382).pdf#

case documentOfficial PDF32024054NOPV_PCO_08232024_(23-264382).pdf#

case documentOfficial PDF32024054NOPV_PCO_08232024_(23-264382)_text.pdf#

32024054NOPV_Final Order_12062024_(23-264382)_text.pdf, page 1Official PDFDecember 6, 2024 VIA ELECTRONIC MAIL TO: matt@tallgrass.com Matt Sheehy President and Chief Executive Officer Tallgrass Energy, LP 370 Van Gordon Street Lakewood, Colorado 80228 Re: CPF No. 3-2024-054-NOPV Dear Mr. Sheehy: Enclosed please find the Final Order issued in the above-referenced case to East Cheyenne Gas Storage, LLC, a subsidiary of Tallgrass Energy, LP. It makes a finding of violation and specifies actions that need to be taken to comply with the pipeline safety regulations. When the terms of the compliance order are completed, as determined by the Director, Central Region, this enforcement action will be closed. Service of the Final Order by e-mail is effective upon the date of transmission and acknowledgement of receipt as provided under 49 C.F.R. § 190.5. Thank you for your cooperation in this matter. Sincerely, Alan K. Mayberry Associate Administrator for Pipeline Safety Enclosures (Final Order and NOPV) cc: Gregory Ochs, Director, Central Region, Office of Pipeline Safety, PHMSA Ms. Danielle Stephens, Director, PHMSA Compliance, Tallgrass Energy, LP, danielle.stephens@tallgrass.com Ms. Crystal Heter, Chief Operating Officer, Tallgrass Energy, LP, crystal.heter@tallgrass.com#

32024054NOPV_Final Order_12062024_(23-264382)_text.pdf, page 2Ms. Nicole Longwell, Associate General Counsel and Chief Operations Compliance Officer, Tallgrass Energy, LP, nicole.longwell@tallgrass.com Mr. Kale Stanton, Vice President, Asset Integrity, Tallgrass Energy, LP, kale.stanton@tallgrass.com CONFIRMATION OF RECEIPT REQUESTED#

32024054NOPV_Final Order_12062024_(23-264382)_text.pdf, page 3U.S. DEPARTMENT OF TRANSPORTATION PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION OFFICE OF PIPELINE SAFETY WASHINGTON, D.C. 20590 ____________________________________ In the Matter of ) ) ) East Cheyenne Gas Storage, LLC, ) a subsidiary of Tallgrass Energy, LP, ) Respondent. ) ____________________________________) ) CPF No. 3-2024-054-NOPV FINAL ORDER On August 23, 2024, pursuant to 49 C.F.R. § 190.207, the Director, Central Region, Office of Pipeline Safety (OPS), issued a Notice of Probable Violation (Notice) to East Cheyenne Gas Storage, LLC (Respondent). The Notice proposed finding that Respondent had violated the pipeline safety regulations in 49 C.F.R. Part 192. The Notice also proposed certain measures to correct the violations. Respondent did not contest the allegations of violation or corrective measures. Based upon a review of all of the evidence, pursuant to § 190.213, I find Respondent violated the pipeline safety regulation listed below, as more fully described in the enclosed Notice, which is incorporated by reference: 49 C.F.R. § 192.481(b) (Item 1) ─ Respondent failed to give particular attention to pipe at soil-to-air interfaces, under thermal insulation, under disbonded coatings, at pipe supports, in splash zones, at deck penetrations, and in spans over water during atmospheric corrosion inspections. This finding of violation will be considered a prior offense in any subsequent enforcement action taken against Respondent. Compliance Actions Pursuant to 49 U.S.C. § 60118(b) and 49 C.F.R. § 190.217, Respondent is ordered to take the actions proposed in the enclosed Notice to correct the violation. The Director may grant an extension of time to comply with any of the required items upon a written request timely submitted by the Respondent and demonstrating good cause for an extension. Upon completion of the ordered actions, Respondent may request that the Director close the case. Failure to comply with this Order may result in the assessment of civil penalties under 49 C.F.R. § 190.223#

32024054NOPV_Final Order_12062024_(23-264382)_text.pdf, page 4or in referral to the Attorney General for appropriate relief in a district court of the United States. Warning Item With respect to Item 2, the Notice alleged a probable violation of 49 C.F.R. § 192.745(a) but did not propose a civil penalty or compliance order for this item. Therefore, this is considered to be a warning item. If OPS finds a violation of this provision in a subsequent inspection, Respondent may be subject to future enforcement action. The terms and conditions of this order are effective upon service in accordance with 49 C.F.R. § 190.5. December 6, 2024 ___________________________________ _________________________ Alan K. Mayberry Date Issued Associate Administrator for Pipeline Safety#

32024054NOPV_Closure Letter_01082025_(23-264382)_text.pdf, page 1Official PDFVIA ELECTRONIC MAIL TO: matt@tallgrass.com; crystal.heter@tallgrass.com; Danielle.stephens@tallgrass.com January 8, 2025 Matt Sheehy President & Chief Executive Officer Tallgrass Energy, LP 370 Van Gordon Street Lakewood, CO 80228 RE: CPF 3-2024-054-NOPV Dear Mr. Sheehy: On December 6, 2024, the Pipeline and Hazardous Materials Safety Administration (PHMSA) issued to East Cheyenne Gas Storage, LLC (ECGS) (a subsidiary of Tallgrass Energy, LP.) a Final Order in the above-referenced case. This Order included a Compliance Order. Based on our review of the documentation provided, it has been determined that ECGS has complied with the terms of this Order. Accordingly, this case is now closed, and no further action is contemplated with respect to the matters involved in this case. Thank you for your cooperation in this matter. Sincerely, Gregory A. Ochs Director, Central Region, Office of Pipeline Safety Pipeline and Hazardous Materials Safety Administration cc: Crystal Heter, Chief Operating Officer, crystal.heter@tallgrass.com Danielle Stephens, Director, PHMSA Compliance, Danielle.stephens@tallgrass.com#