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Congressional District # 08


EPA ID# WID083290981
Last Updated: June, 2015

Site Description

The N.W. Mauthe site is a former electroplating facility, located at 725 South Outagamie Street in Appleton, Wisconsin.  Located in a neighborhood of mixed commercial, light industrial, and residential properties, the one-acre site is bordered by Melvin Street on the north, a parking lot on the west, and the Wisconsin Central Transportation Corporation railroad right-of-way on the southeast.  Private residences are located immediately southeast of the railroad tracks and on the north side of Melvin Street.

Operations at the site were conducted from 1960 to 1987 when all usable plating equipment and solutions were removed from the site. 

Site Responsibility

This site is being addressed through federal and state actions.  The State of Wisconsin, through Wisconsin Department of Natural Resources, is currently the lead agency overseeing the long-term operation and maintenance of the remedy.

Threats and Contaminants

Surface and subsurface soils were contaminated with VOCs, including benzene, toluene, ethylbenzene, and xylenes (BTEX), chlorinated hydrocarbons, 2-butanone, chromium, cadmium, zinc, and cyanide.  Groundwater is contaminated with VOCs, SVOCs, and various inorganic compounds. 

Cleanup Progress

A Record of Decision was signed in March 1994, calling for site demolition, excavation, and offsite treatment of soils contaminated with chromium, capping the site with clay, and the installation of groundwater collection trenches and a groundwater treatment facility with discharge to the sanitary sewer. Construction of the remedy is complete and is now in ongoing operation and maintenance under the direction of the State of Wisconsin to collect and treat contaminated groundwater. 

As required by law, U.S. EPA reviews remedies implemented at sites no less than every five years where hazardous substances remain above levels that allow for unlimited use and unrestricted exposure.  U.S. EPA conducted the initial review in April 2001 and continues to review the implementation of the remedy every five years.  These reviews have determined that the remedy remains protective of human health and the environment in the short term.  However to ensure protectiveness in the long-term, institutional controls are required such as deed restrictions or easements and site access controls that are intended to prevent access, excavation or disturbance of the ground water collection and treatment system or the installation of drinking water wells.  The State of Wisconsin is in the process  of identifying and applying appropriate institutional controls at the site.

During these reviews, additional efforts to identify modifications which will increase the efficiency of the ground water pump and treat system have also been evaluated.  Since influent from the groundwater collection trenches routinely met discharge limits, in April 2006 treatment of the collected groundwater ceased and it was discharged directly to the sanitary sewer and was authorized under a revised discharge permit.  In May 2006, two additional monitoring wells were installed in the former source areas and added to the monitoring plan to better evaluate the plume conditions within the ground water collection area.



Remedial Project Manager, U.S. EPA
david seely (seely.david@epa.gov)
(312) 886-7058

Community Involvement Coordinator, U.S. EPA
susan pastor
(312) 353-1325




Site Profile Information

This profile provides you with information on EPA's cleanup progress at this Superfund site.


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