Ag Chem facility, main COC is Nitrate-Nitrite. UPRR discovered contamination in soil and groundwater in their neighboring property, and it was suspected that this contamination originated from the adjacent property which was leased from UPRR by and operated by Crop Production Services, which has since merged into Nutrien. At the direction of DNR, CPS conducted investigations and discovered that Nitrate-Nitrite and a couple of pesticides were discovered in groundwater, and Nitrate-Nitrite is the main COC in groundwater. Following these investigations, a long-term groundwater monitoring plan was implemented and semi-annual groundwater monitoring has been ongoing since.