Thanks JoeTank for your response. In Michigan we have a choice of two approved methods. Any new method that we use requires approval by our STATE and that method must be third party reviewed and approved by MWGLDE.
The State of Michigan in their amendments to NFPA30/2000, require all AST (field fabricated) on grade tanks to have a continuous leak detection system in play by 2008. Is there any other states requiring this??