Storage Tank System Design

Storage tank systems UST's and  AST's must prevent releases due to structural failure, corrosion, or spills and overfills for as long as the tank system is used to store regulated substances.

Tank Design

Tank construction materials must be compatible with the substance being stored.

Because the chemical and physical properties of renewable fuels (such as ethanol and biodiesel blends) and hazardous substances may make them more aggressive to certain tank system materials than petroleum, it is important that all tank system components in contact with these liquids are materially compatible.

Atmospheric Tanks cannot be used to store liquids at temperatures at or above their boiling point and must be designed and constructed in accordance with recognized engineering standards.

Tanks that are designed and intended for aboveground use must not be used as underground tanks.

A checklist table containing information on the classification of liquids

Tanks that are designed and intended for underground use must not be used as aboveground tanks.

A tank explosion that occurred when a UST was used an AST

 

Piping Design

Piping materials must be compatible with the substance that it will contain, and must be maintained liquid-tight.

Piping must be designed and constructed in accordance with recognized engineering standards.

  • Underground piping must meet the design standards, specifications, and requirements provided in OPS storage tank regulations, U.S. EPA regulations and NFPA fire code.
    • Secondary containment and interstitial monitoring is required for all new piping installations, including piping to remote fill connections.
    • For replaced piping, secondary containment and interstitial monitoring is required for the total length of piping connected to a single UST whenever more than 50% or 50 feet (whichever is less) of the piping connected to that tank is replaced.
A photo of a storage tank system Secondary Containment and Monitoring checklist

 

Classification of liquids