Active Ag-Chem Mix/Load Facility

Sand County Environmental performed groundwater sampling at an active ag-chem facility in Central Wisconsin that identified the presence of a nitrate-nitrogen and pesticide plume extending nearly two miles through a residential neighborhood and village.

Project work included:

• Mapping the plume and projecting peak plume concentrations by installing monitoring wells and using wells and data from five existing LUST sites.
• Notifying residents (>75 homes) within the plume area of the risk of using private well water.
• Identifying and sampling private wells (>20).
• Sampling of private wells leading to the abandonment of impacted wells or restriction of well use.
• Mapping of the plume involved a synthesis of aquifer, geology, basin and bedrock geometry, and other data.

Regulators reference this case as a sample project for sites with complex data and impacted private wells.