UCAR LOUISIANA PIPELINE LLC — Integrity Assurance Notification

ALTERNATIVE PIPE SAMPLINGPursuant to 49 CFR 192.18, Dow is submitting this notification with intent to use ILI for the purposes of measuring material properties and attributes to delineate populations as described in the attached procedure PIM 1.58 Measuring Material Properties and Attributes Using ILI, when verifying pipeline material properties and attributes in accordance with §192.607(e) (5). Dow is using ILI to delineate populations as permitted in FAQ 21 and ILI to measure material properties and attributes as permitted in FAQ 22. Dow intends to use this approach as part of its §192.607 process, PIM-1.01a Verification of Pipeline Materials and Attributes. This request is for the 8” UCAR Mossville to Kaplan line segment as outlined in the attached document titled “DOW Chemical_08MOSKAP_RoMat PGS and MPV Summary”. Dow will use ILI for delineating populations beginning no earlier than: 1. The date that a response is received from the Associate Administrator for Pipeline Safety confirming that the use of ILI help determine populations is accepted. or 2. [April 13, 2023] (91 days after submittal of this notification), unless a letter is received from the Associate Administrator for Pipeline Safety informing Dow that PHMSA objects to the proposed alternative sampling method or that PHMSA requires additional time to conduct its review.#