The tanks at Red Hill are constructed of concrete with an internal lining of steel ranging in thickness from 1/4 inch to 1/2 inch thick. Each tank lining consists of hundreds of steel plates, connected by thousands of feet of welds. The steel lining was originally installed at the time of construction in the early 1940’s. Evaluating the condition of these plates is critical in determining the remaining working life of the tank. The condition of the existing steel is also important in determining the suitability of various tank upgrade alternatives.

The Administrative Order on Consent (AOC) requires the Navy to initially develop a report that describes in detail the current practices for assessing the condition of the steel used in the tanks and associated fuel containment infrastructure. The Navy will also develop a plan to conduct destructive testing on the steel in one or more tanks. Once the destructive testing has been completed, a decision will be made on necessary modifications to the Navy’s existing procedures to evaluate the condition of the steel.

On April 4, 2016 the Navy submitted the Corrosion and Metal Fatigue Practices Report (CMFP Report) which can be viewed below. On June 30, 2016, the Regulatory Agencies completed their review and approved the CMFP Report. Since that time the Parties to the AOC have had numerous disucssions regarding the scope of destructiive testing the Navy and DLA will conduct on the tanks at Red Hill. Discussions on this scope of work were also held with external Subject Matter Experts in October 2016. On December 27, 2016 the Navy and DLA submitted a draft "General Destructive Testing Statement of Work, 23 December 2016" which can also be viewed below. The Regulatory Agencies will review this draft document, solicit input from external Subject Matter Experts and provide comments to the Navy and DLA.

Documents

• Draft General Destructive Testing Statement of Work, 23 December 2016 (PDF)(18 pp, 242 K, 12/23/2016)
  Red Hill AOC Statement of Work Section 5.3 (Draft, Pre- Decisional, Do Not Cite or Quote, For Discussion Purposes Only)
• Final Red Hill AOC Para 5.2 Corrosion and Metal Fatigue Practices Report - April 4, 2016 (PDF)(52 pp, 1 MB, 04/04/2016)
  Red Hill Administrative Order on Consent, Attachment A Scope of Work Deliverable: Section: 5.2 - Corrosion and Metal Fatigue Practices Report - 4/4/2016
• Regulatory Agencies' Approval of Corrosion and Metal Fatigue Practices Report - June 30 2016 (PDF)(2 pp, 183 K, 06/30/2016)
  Approval in whole with comments of Red Hill AOC SOW Deliverable-5.2 Corrosion and Metal Fatigue Practices Report