NUSTAR PIPELINE OPERATING PARTNERSHIP L.P. — Integrity Assurance Notification

PRESSUREThis is a notification of a Long-Term Pressure Reduction under 49 CFR § 195.452 (h)(1)(ii). On March 3, 2022, NuStar Pipeline Operating Partnership L.P. implemented a pressure reduction on the Chatham to Hampton 10” pipeline segment as requested by PHMSA in response to the February 27, 2022 El Dorado, Arkansas release (7000-1 Report No. 20220065-36508). In response to the release, NuStar remediated the failure by removing the involved section of pipe. In addition and by request of PHMSA, a Temporary Pressure Reduction (TPR) was issued as part of restarting the segment. Although the involved section had already been removed, NuStar elected to perform an additional assessment on this testable segment and will remain operating under the TPR until the assessment, and resulting required remediation, is complete. Regarding this assessment, ILI tools have been successfully run on January 26, 2023 and February 16, 2023. The final results of the assessment are expected to be received in May 2023.#