Wis. Admin. Code § ATCP 33.12
(1) Requirements. Except as provided in sub. (2), the base of each mixing and loading pad, the base of each secondary containment structure, and the floor of each building used to store bulk fertilizer or bulk pesticide shall be all of the following:
(2) Exemption. Subsection (1) does not apply to the reconstruction, expansion or alteration of a mixing and loading pad, secondary containment structure or storage building that was in use prior to November 1, 2006.
Note: The exemption under sub. (2) applies only to sub. (1). It does not exempt a storage facility from any other federal, state or local regulations that may apply.
History: CR 05-108: cr. Register October 2006 No. 610, eff. 11-1-06; correction in (1) (b) made under s. 13.92 (4) (b) 6., Stats., Register January 2012 No. 673.