Mich. Admin. Code R. 29.2190
Rule 90. Section 280.250 is added as adopted from the July 15, 2015, EPA-UST rules as follows:
Section 280.250 Definitions. For purposes of this subpart, the following definitions apply:
"Airport hydrant fuel distribution system (also called airport hydrant system)" means an UST system which fuels aircraft and operates under high pressure with large diameter piping that typically terminates into 1 or more hydrants (fill stands). The airport hydrant system begins where fuel enters 1 or more tanks from an external source such as a pipeline, barge, rail car, or other motor fuel carrier.
"Field-constructed tank" means a tank constructed in the field. For example, a tank constructed of concrete that is poured in the field, or a steel or fiberglass tank primarily fabricated in the field is considered field-constructed.
Mich. Admin. Code R. 29.2190