TRANSCONTINENTAL GAS PIPE LINE COMPANY — Integrity Assurance Notification

ASSUMED TOUGHNESSWilliams Companies, Inc. (Williams) is providing this notification to PHMSA pursuant to the requirements set forth in 49 C.F.R. §192.18(a). Williams intends to use other appropriate and conservative default Charpy V-Notch (CVN) and/or fracture toughness values (Kc) for use in analyzing crack-related conditions applicable to 49 C.F.R. §192.712(d). Portions of this notification contain business confidential and non-public information that is necessary for PHMSA to complete its review of Williams’ 192.18 notification. As such, Williams is providing two copies of the notification – one redacted copy and one unredacted copy, marked as confidential and protected from disclosure under the applicable laws and regulations, to PHMSA. This document contains confidential business and commercial information, including trade secrets, and sensitive security information protected from disclosure under FOIA 5 U.S.C. §552. Williams is providing the document subject to those confidentiality claims and states that disclosure would cause substantial injury to the competitive position of Williams. Applicable law requires that such information is to be maintained as confidential by PHMSA. To the extent a third-party requests release of this information under Federal Law, we understand that the PHMSA will inform Williams, as required by Federal Law, and provide Williams the opportunity to substantiate the original claim of confidentiality or otherwise seek protection from disclosure of the confidential information.#