SYMPOSIA PAPER Published: 01 January 1993

Risk Assessment to an Integrated Planning Model for UST Programs


The U.S. Postal Service maintains the largest civilian fleet in the United States totalling approximately 180,000 vehicles. To support the fleets daily energy requirements, the Postal Service also operates one of the largest networks of underground storage tanks nearly 7,500 nationwide. A program to apply risk assessment to planning, budget development and other management actions was implemented during September, 1989. Working closely with a consultant, the postal service developed regulatory and environmental risk criteria and weighting factors for a ranking model. The primary objective was to identify relative risks for each underground tank at individual facilities. Relative risks at each facility were determined central to prioritizing scheduled improvements to the tank network. The survey was conducted on 302 underground tanks in the Northeast Region of the United States. An environmental and regulatory risk score was computed for each UST. By ranking the tanks according to their risk score, tanks were classified into management action categories including, but not limited to, underground tank testing, retrofit, repair, replacement and closure.

Author Information

Ferguson, KW
United States Postal Service, Washington, DC
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Developed by Committee: E50
Pages: 189–196
DOI: 10.1520/STP25086S
ISBN-EB: 978-0-8031-5224-3
ISBN-13: 978-0-8031-1858-4