Containment Area for Tank

The containment volume should be capable of containing 110% of the tank contents, were it to leak.

google

Go here and look under "equipment" then "Tank Dike Calculator"

http://www.pipingdesigners.com/Tools.htm

Many thanks PennPiper, I found it very interesting site: http://www.pipingdesigners.com/Tools.htm

Musafa....

Some suggestion for consideration regarding tank containments:

- If there is a single containment for a group of tanks, failure only of the largest tank need be considered.

- The 110% volume requirement came from a group of lawyers that inserted it into the laws in the USA. It was widely copied after that.

- The containment need not be square or rectangular - any shape is acceptable.

- Permeability and suitability of the containment must be considered. Clay is sometimes an acceptable material. With NAOH, coated concrete may be a good choice.

- When the containment is designed, disposal of rainwater must be considered. This is most often accomplished by a sump pump with an administrative (locked) startup feature. Yes.....it will become the duty of the lazy operators to periodically go to the tank and pump out the sump

Consider a double wall tank. These prevent the need to worry about rain water, you still have your chemical when there is a leak, they prevent the need of a hazmat team to clean up your containment area if a leak occurs, they are not compromised by cracking over time as in many masonary based containment structures, and may indeed cost less overall. In the USA PolyProcessing and Assman are quality manufacturers of Double Wall polyethelene tanks very suited to your application unless you have pressurized tank or high temperature.

First of all where are in located?

If in the USA EPA regs are 110% for the largest tank and fueling area.

Then I would check on state and local regulations.

Example:

In PA they follow EPA.

In AZ according to ADOT its 150% capacity of are containers(tanks, drums, pails, totes, etc.) ADEQ requires 110% of capacity of largest tank plus 15% for rain.

So my advice for you is first find out what regs your state and local governments are following. Then it's a simple conversion factor of sq ft to gallons to meet it.