Glossary

CATHODE PROTECTION

reverses the electric current that causes corrosion and comes in 2 forms :

  1. Sacrificial anodes can be attached to the storage tank system. Anodes are pieces of metal that are more electrically active than the steel storage system. Thus, the storage system becomes the cathode (+ charge) portion of the resulting battery and the attached metal bits become anodes (- charge). The anodes corrode, sparing the tank system from corrosion.

  2. An impressed current system introduces an electric current into the ground through a series of anodes that are not attached to the UST. Because the current flowing from these anodes to the tank system is greater than the corrosive current attempting to flow from the UST, the corrosive current is inhibited and the storage system is protected.

DIKE
Dikes for Secondary Containment
is a barrier constructed to contain, divert or direct a liquid flow until clean-up is possible


PAD
should be constructed from an impermeable uncracked material, such as concrete, asphalt or clay. It should include curbs to contain spills and be sloped towards a sump to facilitate spill collection.

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