BOARDWALK ETHANE PIPELINE COMPANY, LLC — Integrity Assurance Notification

INTERVALThe BLM-140 pipeline transports ethane from Eunice to Rayne Ethane (BLM-140) segment is part of Williams Olefins Feedstock Pipelines, LLC (OPID 32614). BLM-140 totals 19.4-miles and is located from Eunice, LA to Rayne, LA. in Acadia Parish, Louisiana (see Attachment A). The previous inspection was performed by PII Pipeline Solutions on May 12, 2016. Per, 49 CFR 195.452 (j)(3) this line must be reassessed in 5-years, not to exceed 68 months, making the reassessment due date January 12, 2022. Of the 19.4 miles, 1.19 miles is located in an HCA starting at Station 3763+77 to Station 3826+57.Unfortunately, due to repeated unforeseen challenges with material supply and recently discovered employee safety hazards, Williams has been forced to delay this reassessment to the first quarter of 2022, and will not be able to meet the January 12, 2022 compliance date. Upon taking over operatorship of this line in October, 2020, Williams has made consistent effort to execute this reassessment as can be seen in the timeline below. All piping modifications and temporary facility isolation were complete prior to the cleaning run scheduled on December 2nd. When attempting to run the cleaning tools as scheduled, it was discovered that the launcher isolation valve, which had sealed on numerous occasions the past year, had an internal leak that prohibited safe isolation and purging of the barrel per 195.426.• October 2020 – Williams took over operation of this pipeline system from previous operator.• 1st Quarter 2021 – Williams began scoping and project planning for the in-line inspection.• April 2021 – During a work scoping site visit, William’s integrity personnel identified that the previous operator did not leave a receiver barrel connected to the pipeline system. Additionally, the launcher site did not have adequate kicker piping• April-August 2021 – Project execution work progressed to modify the launcher and receiver to accommodate in line assessments per Williams’ safety standards.• August-October 2021 – Contractor encountered unanticipated supply chain issues procuring the receiver enclosure door and informed Williams that they would not be able to meet the installation schedule to enable the inspection start date of December 2, 2021.• October 2021 –Williams changed plans and began sourcing temporary receiver and associated piping.• November 2021 – Contractors mobilized and installed temporary piping and receiver to facilitate the inspection.• December 2021 – Operations attempted to isolate and blowdown the launcher for loading of the gauge/cleaner tool but found the barrel isolation valve was leaking.o Stop work was initiated and valve repair was attempted but was unsuccessful.o Planning was immediately initiated to stopple the line, safely change out the valve, and remobilize to run the inspection.o It was determined that this would not be possible prior to the January 12th deadline.With the upcoming holidays and additional potential supply chain delays, it is not anticipated that the valve will be replaced in time to allow a January 12th reassessment. Current projections are that the valve will be replaced in January and the reassessment will occur in February. We can provide additional updates upon request. Based on the assessment and repair history provided to Williams by the previous operator, this line was in full compliance with the requirements of 195.452. There is only one HCA in this assessment segment and Williams is confident that this additional delay will not create any increased risk to public safety or the environment.#