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Oconomowoc Electroplating Co. Inc.
Site Information
- Ashippun, WI (Dodge County)
- EPA ID# WID006100275
- NPL Site Narrative
- NPL Fact sheet
- CERCLIS listing
- Alias(es): N/A
Contact Information
Community Involvement Coordinator
Susan Pastor (pastor.susan@epa.gov)
312-353-1325 or 800-621-8431, ext. 31325
Remedial Project Manager
Bill Ryan (ryan.williamj@epa.gov)
312-353-4374 or 800-621-8431, ext. 34374
Repositories
(where to view written records)
Ashippun Town Hall
W1266 Highway O
Oconomowoc, WI
Background
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 it 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...)
Site Updates | Fact Sheets || Technical Documents || Five-Year Reviews
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Site Updates
May 2011
EPA has revised its plan to clean up on-site ground water (underground supply of fresh water) that was contaminated by toxic metals and volatile organic compounds, commonly known as VOCs.
The VOCs included trichloroethylene or TCE, used in electroplating and degreasing operations, and vinyl chloride which is produced when TCE degrades in the natural environment. TCE was used in electroplating and degreasing operations when the plant was in business from 1957 to the early 1980s.
Under the new plan, monitored natural attenuation will be used to let natural processes treat ground water contaminants. Also, residual source areas would be investigated to determine the extent of contamination. This information would then be used to select either excavation or in-place chemical treatment to enhance source-area biological activity and remove VOCs.
Private wells near the site have been sampled regularly since 2005. Results show very low levels of TCE in the wells, but are not a health risk.
The new plan is detailed in the Record of Decision Amendment (PDF) (85pp, 3.5MB) May 2011
Fact Sheets
- 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
Technical Documents
- Record of Decision Amendment (PDF) (85pp, 3.5MB) May 2011
- Proposed Plan 2010 (PDF) (13pp, 184K) December 2010
- Remediation System Evaluation (PDF) (41pp, 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 (82pp, 2.06MB) July 2010
- Draft Focused Feasibility Study Report Figure 1 (PDF) (1pp, 1324K) July 2010
- Draft Focused Feasibility Study Report Figure 2 (PDF) (1pp, 334K) July 2010
- Draft Focused Feasibility Study Report Figure 3 (PDF) (1pp, 76K) July 2010
- Draft Focused Feasibility Study Report Figure 4 (PDF) (1pp, 143K) July 2010
- Draft Focused Feasibility Study Report Figure 5 (PDF) (1pp, 113K) July 2010
- Draft Focused Feasibility Study Report Figure 6 (PDF) (1pp, 99K) July 2010
- Draft Focused Feasibility Study Report Figure 7 (PDF) (1pp, 120K) July 2010
- Draft Focused Feasibility Study Report Figure 8 (PDF) (1pp, 119K) July 2010
- Draft Focused Feasibility Study Report Figure 9 (PDF) (1pp, 174K) July 2010
- Draft Focused Feasibility Study Report Figure 10 (PDF) (1pp, 174K) July 2010
- Final Risk Assessment (PDF) (8pp, 199K) June 2010
- Explanation of Significance Differences (PDF) (11pp, 431K) March 1994
- Explanation of Significant Differences (PDF) (18pp, 302K) September 1991
- Feasibility Study (PDF) (340pp, 6.7MB) July 1990
- Remedial Investigation Report Vol. 1 (PDF) (291pp, 6.8MB) March 1990
- Remedial Investigation Report Vol. 2 (PDF) (395pp, 8.5MB) March 1990
- Record Of Decision (PDF) (95pp, 2.9MB) September 1990
Five-Year Reviews
- Third Five-Year Review Report (PDF) (64pp, 2.9MB) July 2007
- Second Five-Year Review Report (PDF) (37pp, 779K) July 2002
- Five-Year Review Report (PDF) (6pp, 174K) September 1997