Results are available for the organic pollutants and metals that were part of the mass balance sampling effort. The bulkhead line designation along the river on the Wisconsin side from Sixth Street to the Menekaunee Bridge was removed, allowing this section of the river to remain natural and preventing any more land along the river's edge from being bulkheaded. The purge well system installed at the Menominee City Landfill in 1991 has been connected to the sewer system. The contaminated groundwater is being treated at the Menominee Wastewater Treatment Plant. A silty sand cap was installed and seeded with grass at the landfill in 1992.
Preliminary reports indicate that contaminants have been contained on site.
The separation project was completed in 1993 and will be closely monitored to determine the effectiveness of the separation during the spring of 1994. The City of Marinette developed and implemented an industrial pretreatment program to reduce disruptions of wastewater treatment plant operations caused by industrial discharges. High concentration of PAHs, typically found in coal tar waste, have been detected in river sediments adjacent to the Marinette wastewater treatment plant as well as in on-site soils and groundwater. The site, a gas manufacturing plant until 1962, is under investigation with a potentially responsible party to determine the extent of contamination and to assess remediation alternatives. The U.S. Army Corps of Engineers completed a maintenance dredging operation at the mouth of the Menominee River during the summer of 1991.