Agreement to undertake wetland restoration, in lieu of a portion of the financial penalty, is part of the settlement with USEPA (Iowa) for violations of a land spreading NPDES Permit issued under the US federal Clean Water Act.
The company (an animal feeding activity) did not maintain adequate records for its land application of liquid effluent and manure from its feedlot, and did not conduct materials and soils sampling, as required by their NPDES permit.
An NPDES permit is a National Pollutant Discharge Elimination System permit. Here is USEPA information about NPDES permits and these type of (concentrated) animal feeding operations (CAFOs).
Here is the USEPA press release on the settlement.