Underground Storage Tanks

Alternative integrity assessments are methods for determining whether a tank is structurally sound and free of corrosion holes prior to adding cathodic protection. These are alternative methods because they do not use the traditional method of humans entering the tank and performing an internal inspection.

NOTE: QA documents referred to in some of the following publications may be outdated. Visit The EPA Quality System web site for the latest version of EPA's QA documents.

• Guidance On Alternative Integrity Assessment Methods For Steel USTs Prior To Upgrading With Cathodic Protection EPA Memorandum July 25, 1997
• Alternative Integrity Assessment: New ASTM Standard
  EPA Memorandum October 9, 1998
  • Checklist of Requirements of Former ASTM ES 40 and Current ASTM G158
  • Compliance Options for Tank Leak Detection and Integrity Assessment
• Table of maximum widths and depths of sludge/product allowed (1 pg, 6K, About PDF) in the bottom of USTs assessed under the visual-based method in ASTM G 158.
• List of Integrity Assessment Evaluations for UndergroundStorage Tanks - Third Edition January 22, 1999 (8 pp, 46K, About PDF) This 8-page EPA Memorandum (dated February 9, 1999) provides a list of integrity assessment procedures that have been successfully evaluated and certified by a qualified independent third party to meet specified performance criteria.

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