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1. Introduction
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1.1 Background
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Site Number: |
B5VH |
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Contract Number: |
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D.O. Number: |
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Action Memo Date: |
7/27/2010 |
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Response Authority: |
CERCLA |
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Response Type: |
Time-Critical |
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Response Lead: |
EPA |
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Incident Category: |
Removal Action |
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NPL Status: |
Non NPL |
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Operable Unit: |
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Mobilization Date: |
9/22/2010 |
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Start Date: |
9/22/2010 |
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Demob Date: |
9/15/2011 |
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Completion Date: |
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CERCLIS ID: |
WIN000510415 |
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RCRIS ID: |
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ERNS No.: |
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State Notification: |
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FPN#: |
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Reimbursable Account #: |
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1.1.1 Incident Category
Time critical removal action.
1.1.2 Site Description
The building on-site was built as a dry cleaning facility in 1954. The dry cleaning operation has changed owners numerous times since initial construction and is currently operated as Sterling Cleaners. The property is immediately bordered on the west and north by residences. Commercial facilities are located across the street to the east and south.
1.1.2.1 Location
The Sterling Cleaners Site (Site) is located at 304 W. Wisconsin Avenue in Appleton, Outagamie County, Wisconsin.
1.1.2.2 Description of Threat
Historic dumping of the dry cleaning solvent perchloroethylene (PCE) at the Site resulted in significant soil contamination. The PCE migrated through the soils into the groundwater and traveled offsite, resulting in vapor intrusion at neighboring properties.
1.1.3 Preliminary Removal Assessment/Removal Site Inspection Results
In March and August, 2010, U.S. EPA conducted site assessment activities. PCE was detected by U.S. EPA at levels 1,000 times greater than the Preliminary Remediation Goal in soils on Site, 7,500 times greater than the MCL in groundwater, and three times above the action level recommended by the WI Department of Health Services (WDHS) in the indoor air of neighboring properties.
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2. Current Activities
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2.1 Operations Section
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2.1.1 Narrative
This removal action was conducted in two phases. During the first mobilization, in September and October, 2010, contaminated soils were excavated to the extent possible, in-situ treatment was applied to remaining contaminated soils, the excavation area was restored, and a sub-slab depressurization system (SSDS) was installed at a neighboring impacted residence. Performance sampling was conducted in January and May, 2011 to determine the efficacy of the initial removal action remedies. The sampling revealed that the measures taken were reducing the PCE vapors at the neighboring properties, but that there was also an ambient contribution from Sterling Cleaners' operations to the PCE contamintion detected at the neighboring properties.
2.1.2 Response Actions to Date
See previous Polreps for specifics on response actions taken during initial mobilization. On August 29, 2011, U.S. EPA and its ERRS contractor remobilized to the Site to install a remedy to address the ambient PCE vapors impacting the neighboring residences. An existing exhaust fan that vented out the north side of Sterling Cleaners was replaced with a larger air intake fan and two new exhaust fans were installed on the roof of the facility. With these modifications, PCE emissions from the dry cleaning operations are now vented away from neighboring homes. A final round of performance sampling was conducted September 14-15, 2011 to determine the efficacy of the U.S. EPA removal action.
2.1.3 Enforcement Activities, Identity of Potentially Responsible Parties (PRPs)
EPA's enforcement team continues to evaluate financial viability of PRPs.
2.1.4 Progress Metrics
| Waste Stream |
Medium |
Quantity |
Manifest # |
Treatment |
Disposal |
| Concrete |
Solid |
10 cu.yds |
NA |
NA |
Valley Trail Landfill |
| PCE contaminated soil (F002) |
Solid |
150 Tons |
007796753JJK
007796754JJK
007796755JJK
007796756JJK
007796757JJK
007796758JJK
007796759JJK
007796760JJK
007796761JJK
007796762JJK |
Chemical Oxidation |
EQ |
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2.2 Planning Section
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2.2.1 Anticipated Activities
This removal action is complete. No further U.S. EPA action is anticipated for this Site.
2.2.1.2 Next Steps
The WI Department of Natural Resources (WDNR) will continue to monitor the groundwater in the area. The SSDS and HVAC system installed as part of this removal action will be maintained by the respective property owners.
2.2.2 Issues
Final indoor air sample results for the impacted residence are still pending. It is possible that the PCE concentrations will still be above the levels recommended by WDHS.
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2.3 Logistics Section
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No logistics issues to report.
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2.4 Finance Section
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No information available at this time.
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2.5 Other Command Staff
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2.5.1 Safety Officer
No safety incidents occurred during the removal action.
2.6 Liaison Officer
The Appleton Health Department, WDHS, and WDNR were actively involved in the removal action. The Appleton Department of Public Works also assisted U.S. EPA with the initial mobilization and the Appleton Building Department assisted with the second mobilization.
2.7 Information Officer
Information flyers regarding the removal action were distributed in the area and to Sterling Cleaners' customers during the removal action. Copies are available at www.epaosc.org/sterlingcleaners.
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3. Participating Entities
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3.1 Unified Command
Not applicable.
3.2 Cooperating Agencies
Appleton Building Department
Appleton Health Department
Appleton Public Works Department
Wisconsin Department of Health Services
Wisconsin Department of Natural Resources
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4. Personnel On Site
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During the August and September, 2011 mobilization:
EPA: 1
ERRS (ER): 1 + ERRS subcontractors (4)
START (Weston): 2
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5. Definition of Terms
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ERRS: Emergency and Rapid Response Services
HVAC: Heating, ventilation, and air conditioning
MCL: Maximum Contaminant Level (drinking water standard)
PCE: Perchloroethylene (also known as Tetrachloroethylene)
SSDS: Sub-slab Depressurization System
START: Superfund Technical Assessment & Response Team
U.S. EPA: United States Environmental Protection Agency
WDHS: Wisconsin Department of Health Services
WDNR: Wisconsin Department of Natural Resources
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6. Additional sources of information
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6.1 Internet location of additional information/report
Additional information is available at www.epaosc.org/sterlingcleaners.
6.2 Reporting Schedule
Final Polrep will be issued upon receipt of the indoor air sampling results.
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7. Situational Reference Materials
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WDNR Vapor Intrusion Information: http://dnr.wi.gov/org/aw/rr/technical/vapor.htm
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