Oconomowoc Electroplating Co. Inc.
Community Involvement Coordinator
Susan Pastor (firstname.lastname@example.org)
312-353-1325 or 800-621-8431, ext. 31325
Remedial Project Manager
Bill Ryan (email@example.com)
312-353-4374 or 800-621-8431, ext. 34374
(where to view written records)
Ashippun Town Hall
W1266 Highway O
The Oconomowoc Electroplating Co., Inc. site is located in the unincorporated town of Ashippun, a rural area about 35 miles west of Milwaukee. It operated from 1957 to the early 1980s as an industrial facility that used metals, chemicals and organic compounds in its production process. During that time, the company discharged untreated wastewater into nearby wetlands and Davy Creek. Two unlined lagoons on the property contained electroplating sludge. These lagoons leaked and sometimes overflowed. Contaminants made their way into the ground water beneath and downstream of the site. (more...)
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EPA will be on site this spring and summer to clean up contamination that the pump and treat system failed to remove. Beginning in early May, Ashippun residents may notice extra people and activity around the treatment plant. Construction work is expected to take place weekdays during daylight hours through the end of June.
The work will entail excavating five small areas around the treatment plant building and mixing in a non-toxic form of iron that will quickly break down the volatile organic compounds which are still contaminating the ground water.
A “geotextile” fabric will be placed over the excavated areas. Leftover material will be used as backfill and topsoil will cover each area before it is graded. The topsoil surface will be seeded after final grading is completed. Erosion control measures will remain in place until vegetation is re-established.
Before this work can begin, however, the site will go through some extensive preparation. First, a temporary chain-link fence will be installed around the edge of the construction area and connected to the existing fence around the treatment building. Next, an entrance/exit area will also be added so vehicles and equipment can easily move in and out. A staging area will also be set up around the treatment areas to store equipment and supplies. The excavation and soil mixing areas will be defined and marked. Shrubs, bushes, and small trees, as well as the asphalt drive from Elm Street to the treatment building, will be removed. Finally, temporary barriers will be necessary to prevent uncontrolled stormwater flow.
Last year, EPA completed a status review of the cleanup. This type of review is required at least every five years where the cleanup is complete but hazardous waste remains managed on-site. These reviews are done to ensure that the cleanup continues to protect people and the environment.
The review included:
- An evaluation of background information
- Cleanup requirements
- Effectiveness of the cleanup and any anticipated future actions
- An analysis of ways for EPA to operate more efficiently
The review found that the cleanup continues to protect people and the environment. This was the fourth five-year review for Oconomowoc Electroplating. The next scheduled review will be in 2017.
- EPA Proposes Revisions to Cleanup Plan (There was a public comment period from Janaury 17 - February 16, 2011) (6pp, 803K) November 2010
- U.S. EPA Completes Study of Contamination at the Oconomowoc Electroplating Company Superfund Site (PDF) (12pp, 768K) March 1990
- U.S. EPA Proposes Plan for Interim Cleanup Action at Oconomowoc Electroplating Superfund Site (PDF) (20pp, 912K) July 1990
- Record of Decision Amendment (PDF) (85 pp, 3.5MB) May 2011
- Proposed Plan 2010 (PDF) (13 pp, 184K) December 2010
- Remediation System Evaluation (PDF) (41 pp, 821K) March 2000
- Annual Groundwater Report - view at repository or contact Susan Pastor
- Hydrogeologic investigation and Groundwater Extraction System Evaluation - view at repository or contact Susan Pastor
- Draft Focused Feasibility Study Report (82 pp, 2.06MB) July 2010
- Draft Focused Feasibility Study Report Figure 1 (PDF) (1 pg, 1324K) July 2010
- Draft Focused Feasibility Study Report Figure 2 (PDF) (1 pg, 334K) July 2010
- Draft Focused Feasibility Study Report Figure 3 (PDF) (1 pg, 76K) July 2010
- Draft Focused Feasibility Study Report Figure 4 (PDF) (1 pg, 143K) July 2010
- Draft Focused Feasibility Study Report Figure 5 (PDF) (1 pg, 113K) July 2010
- Draft Focused Feasibility Study Report Figure 6 (PDF) (1 pg, 99K) July 2010
- Draft Focused Feasibility Study Report Figure 7 (PDF) (1 pg, 120K) July 2010
- Draft Focused Feasibility Study Report Figure 8 (PDF) (1 pg, 119K) July 2010
- Draft Focused Feasibility Study Report Figure 9 (PDF) (1 pg, 174K) July 2010
- Draft Focused Feasibility Study Report Figure 10 (PDF) (1 pg, 174K) July 2010
- Final Risk Assessment (PDF) (8 pp, 199K) June 2010
- Explanation of Significance Differences (PDF) (11 pp, 431K) March 1994
- Explanation of Significant Differences (PDF) (18 pp, 302K) September 1991
- Feasibility Study (PDF) (340 pp, 6.7MB) July 1990
- Remedial Investigation Report Vol. 1 (PDF) (291 pp, 6.8MB) March 1990
- Remedial Investigation Report Vol. 2 (PDF) (395 pp, 8.5MB) March 1990
- Record Of Decision (PDF) (95 pp, 2.9MB) September 1990
- Fourth Five-Year Review Report (PDF) (66 pp, 3.7MB) July 2012
- Third Five-Year Review Report (PDF) (64 pp, 2.9MB) July 2007
- Second Five-Year Review Report (PDF) (37 pp, 779K) July 2002
- Five-Year Review Report (PDF) (6 pp, 174K) September 1997