Delivery personnel must be made aware of the type and operation of the overfill prevention present and alarms should be tested on a routine basis to ensure proper operation. The simple reason for this requirement is that unprotected steel corrodes and leaks occur through the corrosion holes. Steel tanks and piping coated with non-corrodible material are also considered to have adequate corrosion protection. Note that galvanized steel is not a non-corrodible material and must be removed by the deadline. Adding a non-corrodible interior lining to steel tanks can also satisfy corrosion protection requirements.
Factory coated steel with cathodic protection can also provide adequate corrosion protection.
Cathodic protection can be added to a factory-coated steel tank or piping. Both systems must be designed and installed by a corrosion expert and both require annual testing to verify protection and periodic maintenance. Just a simple reminder, it is now summer 1996, you have less than three construction seasons left if grounds on your airport tend to freeze. Don't delay in making the decision to get your program started, because you have both known and unknown issues to consider. Scheduling Issues such as conflicting needs, weather, funding, contracting requirements and corrective action requirements have and will continue to ruin the best laid plans and schedules.