State Coalition for Remediation of Drycleaners Site Profiles
Cedarburg Drycleaners, Cedarburg, Wisconsin
Description
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The Cedarburg Dry Cleaners is an active facility that has operated in a mixed commercial and residential area since about 1968. The drycleaner has used perchloroethylene (PCE), and investigations revealed the presence of PCE in soil and PCE and its breakdown products in groundwater. One source of contamination was the illegal disposal of solvents on-site. The investigation results also suggest that a one-time spill inside the facility, the release of PCE through floor drains, and the temporary placement of filters in the grass behind the facility also contributed to soil and groundwater contamination. Contamination has migrated off-site, but has not impacted drinking water wells. |
Contaminants
Contaminants present and the highest amount
detected in both soil and groundwater.
Contaminant | Media | Concentration (ppb) | Nondetect |
---|---|---|---|
1,1-Dichloroethene | groundwater | 1,000 ppb | |
Tetrachloroethene (PCE) | groundwater | 6,800 ppb | |
Tetrachloroethene (PCE) | soil | 21,000 ppb | |
Trichloroethene (TCE) | groundwater | 810 ppb | |
Trichloroethene (TCE) | soil | 300 ppb |
Site Hydrology
Deepest Significant Groundwater Contamination: | 30ft bgs | |
Plume Size: | Plume Length: 165ft Plume Width: 70ft |
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Average Depth to Groundwater: | 4ft |
Lithology and Subsurface Geology
Somewhat poorly drained, dark brown silty clay topsoil and fill with occasional sand and gravel Depth: 1-4ft bgs 3ft thick Conductivity: 0.03ft/day Gradient: 0.045ft/ft |
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Brown and gray silty clays and clayey silts Depth: 4-16ft bgs 12ft thick Conductivity: 0.03ft/day |
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Grey silty clay with a trace of sand and gravel and some discontinuous seams Depth: 15-39ft bgs 24ft thick Conductivity: 0.03ft/day |
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Silty fine sands Depth: 39ft bgs Conductivity: 28ft/day |
Pathways and DNAPL Presence
Groundwater Sediments Soil DNAPL Present |
Remediation Scenario
Cleanup
Goals: |
Restore the contaminated soil and groundwater, to the extent practicable, and minimize the potential risks associated with the contamination in accordance with WI state spill law, Chapter NR 700. Treated soils returned to the excavation site must contain PCE concentrations below the WI Admin. Code, Chapter NR 600 Land Disposal Restriction limit of 6 mg/kg. |
Technologies
In Situ Bioremediation |
Final remediation design: Results to date: Next Steps: Cost to Design and Implement: |
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In Situ Soil Vapor Extraction |
Final remediation design: Results to date: Cost to Design and Implement: |
Costs
Cost
for Assessment: |
Soil: $18,336; Groundwater: $54,251 | |
Cost
for Operation and Maintenance: |
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Total
Costs for Cleanup: |
$486,680 (includes reimbursed and deductible costs). Site closed in 2005. |
Lessons Learned
1. The size of the equipment limited the success of the MITU. The technology itself was successful, but the trencher could not penetrate deep enough. The machine size was not suited to the site. |
Contacts
Scott Ferguson Hydrogeologist Remediation and Redevelopment, Milwaukee Service Center WI Department of Natural Resources 2300 N. Martin Luther King Jr. Dr. PO Box 12436 Milwaukee, WI 53212 414-263-8685 Fergus@dnr.state.wi.us Contractors: Key Environmental Services W66 N215 Commerce Court Cedarburg, WI 414-375-4750 Jim Drought ARCADIS Geraghty & Miller, Inc. 126 North Jefferson Street, Suite 400 Milwaukee, WI 53202 414-276-7742 |