What is the designed function of a vapor collection tank (vapor pot) placed between underground tanks and dispensers?

What is the designed function of a vapor collection tank (vapor pot) placed between underground tanks and dispensers?

• A. Collect And Condense Vapors So They Can Be Measured And Reported To The Local Air Authority
• B. Remove Condensed Vapors From The UST System To Be Disposed Of When The Tank Reaches No More Than 95% Full
• C. Allow Collection Of Condensed Vapors At A Low Point And A Means To Remove Them
• D. None Of These

Answer: (C)

The main idea is that a vapor collection tank is there to capture condensate and give you a way to remove it. Vapors from underground storage can condense as they travel through lines and vents, especially where temperatures change. Placing a vapor pot between the underground tanks and the dispensers catches those condensed vapors at a low point and provides a drain or removal path, so the liquid can be drained and the vapor system remains sealed and functional. This setup helps minimize vapor releases during operation and maintenance. It’s not primarily about measuring emissions for reporting or about a 95% fill condition; the key purpose is collection of condensate with a means to remove it.

The main idea is that a vapor collection tank is there to capture condensate and give you a way to remove it. Vapors from underground storage can condense as they travel through lines and vents, especially where temperatures change. Placing a vapor pot between the underground tanks and the dispensers catches those condensed vapors at a low point and provides a drain or removal path, so the liquid can be drained and the vapor system remains sealed and functional. This setup helps minimize vapor releases during operation and maintenance. It’s not primarily about measuring emissions for reporting or about a 95% fill condition; the key purpose is collection of condensate with a means to remove it.