02108 THE USE OF INNOVATIVE INSTALLATION METHODS FOR PROTECTION OF LARGE GROUPS OF ABOVEGROUND FUEL STORAGE TANKS

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Product Number: 51300-02108-SG

ISBN: 02108 2002 CP

Author: Paul S. Rothman, Frank G. Hemerlein, and Nicholas Pressly

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The application of cathodic protection (CP) to steel bottoms of large groups of aboveground fuel storage tanks and monitoring the effectiveness of the systems poses several unique complications. The objectives of these systems are to provide uniform current distribution to all areas of the tank bottom, while causing minimal disruption of facility operations and limiting the amount of influence on other piping systems in the area. The requirement to apply CP to the bottoms of 40 aboveground tanks at the Satellite Tank Farm at John F. Kennedy International Airport presented unique obstacles. These included the congested nature of the facility, the existence of multiple fuel systems entering the Tank Farm whose CP systems require electrical isolation from the tanks, the numerous underground crossings of these lines. The monitoring of the protection levels at the critical locations on the tank bottoms, as well as at the critical interfaces between piping systems, presented additional challenges. The consideration of the above requirements led to a system design and installation methods that proved innovative in nature and enhanced available technology for the future application of CP to such structures. The installation methods included horizontal directional drilling and insertion of anode casings, as well as air jetting of reference electrodes under the tanks. The systems will also include state-of-the-art remote monitoring capabilities.