Section 204.270  Begin Actual Construction

"Begin actual construction" means, in general, initiation of physical on-site construction activities on an emissions unit that are of a permanent nature.  Such activities include, but are not limited to, installation of building supports and foundations, laying underground pipework, and construction of permanent storage structures.  With respect to a change in method of operations, this term refers to those on-site activities other than preparatory activities that mark the initiation of the change.