subsurface protection 2

[harrypain]

Good day all,
I am designing a subsurface application in a tank, following NFPA 11. Clause 5.2.6.3.2 ask to have the outlets located at least 0.3 m (1 ft) above the highest water level to prevent destruction of the foam.
Someone can tell me how can I estimate the water level in a diesel tank?

 

[stookeyfpe]

If this is a field erected AST it will have what I term a water drawoff sump so that condensate can be drained from the tank. This is located on the tank floor.

 

[IFRs]

Only your operations department can tell you, based on experience, how much water there will be.