1. This subchapter shall not apply to a person who stockpiles dry manure if the stockpile’s dry manure originates from a confinement feeding operation that was constructed prior to January 1, 2006, unless the confinement feeding operation is expanded after that date.
2. Subsection 1 does not apply to any of the following:
a. A person who stockpiles dry manure in violation of section 459.311.
b. A stockpile where precipitation-induced runoff has drained away.