Description
Historical activity that resulted
in contamination.
| The site operated as a dry cleaning facility until the early 1980's. The dry cleaning facility moved from this location following a fire in March 1989. The property is being leased as storage space and is currently vacant pending renovation activities.
Stoddard solvent was used as the dry cleaning solvent until ~1973, at which time the facility switched to the use of tetrachloroethene.
The adjacent properties include light industrial and commercial facilities, office buildings, a fire station and residential dwellings.
The Fox River is located down-gradient of the site. Remediation Status: In groundwater monitoring |
Contaminants
Contaminants present and the highest amount
detected in both soil and groundwater.
| Contaminant |
Media |
Concentration (ppb) |
Nondetect |
| cis-1,2-Dichloroethene |
soil |
29,000 ppb |
|
| cis-1,2-Dichloroethene |
soil |
29,000 ppb |
|
| Tetrachloroethene (PCE) |
soil |
29,000 ppb |
|
| Tetrachloroethene (PCE) |
soil |
29,000 ppb |
|
| Trichloroethene (TCE) |
soil |
29,000 ppb |
|
| Trichloroethene (TCE) |
soil |
29,000 ppb |
|
| trans-1,2-Dichloroethene |
soil |
29,000 ppb |
|
| trans-1,2-Dichloroethene |
soil |
29,000 ppb |
|
| Vinyl Chloride |
soil |
29,000 ppb |
|
|
soil |
13,000,000 ppb |
|
|
soil |
49,000 ppb |
|
|
soil |
46 ppb |
|
|
groundwater |
2,700 ppb |
|
Site Hydrology
| Deepest Significant
Groundwater Contamination: |
|
|
| Plume Size: |
|
|
| Average Depth
to Groundwater: |
|
5ft |
Lithology and Subsurface Geology
|
|
Fill consisting of sand with with silt
Depth: 0-3.75ft bgs
3.75ft thick
Conductivity: 0.00915ft/day
Gradient: 0.025ft/ft
|
|
|
silty sand
Depth: 3.75-13ft bgs
9.25ft thick
|
|
|
Clay with occassional trace silt and organic material
Depth: 13ft bgs
|
Pathways and DNAPL Presence
 Groundwater
 Sediments
Soil
Presumptive Evidence of DNAPL
|
Vapor Intrusion Pathway
Has the potential for vapor intrusion (VI) been evaluated? |
|
No
|
Has a vapor mitigation system been installed? |
|
Yes |
Type of Vapor Mitigation System(s): |
|
Passive Vapor Barrier
Sub-slab Depressurization
Sub-slab Pressurization
Passive Venting
HVAC controls/modifications
Soil Vapor Extraction
|
Remediation Scenario
Cleanup
Goals: |
|
To protect human health and the environment while allowing successful redevelopment. To achieve closure and compliance with Wisconsin standards.
|
Remedy Level: |
|
Full Scale Remedy |
Technologies
in Situ Bioremediation |
|
Why the technology was selected:
Based on technical and economic feasibility, none of the remedial action options were suitable for use as a sole remedy. Most feasible options were combined to create a remedial strategy.
Date implemented:
June 2003
Final remediation design:
Excavation of 226.85 tons of soil (non-hazardous waste) from the parking lot. Trench excavation of 178.76 tons of soil (hazardous) from beneath the building (infiltration gallery). Application of carbon amendment solution (initially 25:1 solution of potable water and food-grade molasses; later 15:1) to the infiltration gallery. Installation of a passive vapor extraction system.
Other technologies used:
Enhanced biodegradation - carbon amendment solution consisting of water and molasses.
Results to date:
A total of 30 injection events have taken place.
Since the start of injection activities, one well has had PCE decrease from 89,000 ug/L to below laboratory detection limits. The concentration of TCE has decreased from 26,000 ug/L to 1,200 ug/L. The concentration of daughter products have increased since the start of remediation activities which is to be expected.
Next Steps:
Continued groundwater monitoring for natural attenuation parameters.
5/2012 - Injection events have decreased groundwater concentrations, but the site has not met closure criteria. A new round of molasses injection is being conducted. Off-site migration of vapors is being investigated.
Cost to Design and Implement:
$281,802
|
in Situ Vapor Mitigation |
|
Why the technology was selected:
Based on technical and economic feasibility, none of the remedial action options were suitable for use as a sole remedy. Most feasible options were combined to create a remedial strategy.
Date implemented:
June 2003
Final remediation design:
Excavation of 226.85 tons of soil (non-hazardous waste) from the parking lot. Trench excavation of 178.76 tons of soil (hazardous) from beneath the building (infiltration gallery). Application of carbon amendment solution (initially 25:1 solution of potable water and food-grade molasses; later 15:1) to the infiltration gallery. Installation of a passive vapor extraction system.
Results to date:
A total of 30 injection events have taken place.
Since the start of injection activities, one well has had PCE decrease from 89,000 ug/L to below laboratory detection limits. The concentration of TCE has decreased from 26,000 ug/L to 1,200 ug/L. The concentration of daughter products have increased since the start of remediation activities which is to be expected.
Next Steps:
Continued groundwater monitoring for natural attenuation parameters.
5/2012 - Injection events have decreased groundwater concentrations, but the site has not met closure criteria. A new round of molasses injection is being conducted. Off-site migration of vapors is being investigated.
Cost to Design and Implement:
$281,802
|
in Situ Soil Removal |
|
Why the technology was selected:
Based on technical and economic feasibility, none of the remedial action options were suitable for use as a sole remedy. Most feasible options were combined to create a remedial strategy.
Date implemented:
June 2003
Final remediation design:
Excavation of 226.85 tons of soil (non-hazardous waste) from the parking lot. Trench excavation of 178.76 tons of soil (hazardous) from beneath the building (infiltration gallery). Application of carbon amendment solution (initially 25:1 solution of potable water and food-grade molasses; later 15:1) to the infiltration gallery. Installation of a passive vapor extraction system.
Results to date:
A total of 30 injection events have taken place.
Since the start of injection activities, one well has had PCE decrease from 89,000 ug/L to below laboratory detection limits. The concentration of TCE has decreased from 26,000 ug/L to 1,200 ug/L. The concentration of daughter products have increased since the start of remediation activities which is to be expected.
Next Steps:
Continued groundwater monitoring for natural attenuation parameters.
5/2012 - Injection events have decreased groundwater concentrations, but the site has not met closure criteria. A new round of molasses injection is being conducted. Off-site migration of vapors is being investigated.
Cost to Design and Implement:
$281,802
|
ex Situ Soil Removal |
|
Why the technology was selected:
Based on technical and economic feasibility, none of the remedial action options were suitable for use as a sole remedy. Most feasible options were combined to create a remedial strategy.
Date implemented:
June 2003
Final remediation design:
Excavation of 226.85 tons of soil (non-hazardous waste) from the parking lot. Trench excavation of 178.76 tons of soil (hazardous) from beneath the building (infiltration gallery). Application of carbon amendment solution (initially 25:1 solution of potable water and food-grade molasses; later 15:1) to the infiltration gallery. Installation of a passive vapor extraction system.
Results to date:
A total of 30 injection events have taken place.
Since the start of injection activities, one well has had PCE decrease from 89,000 ug/L to below laboratory detection limits. The concentration of TCE has decreased from 26,000 ug/L to 1,200 ug/L. The concentration of daughter products have increased since the start of remediation activities which is to be expected.
Next Steps:
Continued groundwater monitoring for natural attenuation parameters.
5/2012 - Injection events have decreased groundwater concentrations, but the site has not met closure criteria. A new round of molasses injection is being conducted. Off-site migration of vapors is being investigated.
Cost to Design and Implement:
$281,802
|
in Situ Vapor Mitigation |
|
Why the technology was selected:
Based on technical and economic feasibility, none of the remedial action options were suitable for use as a sole remedy. Most feasible options were combined to create a remedial strategy.
Date implemented:
June 2003
Final remediation design:
Excavation of 226.85 tons of soil (non-hazardous waste) from the parking lot. Trench excavation of 178.76 tons of soil (hazardous) from beneath the building (infiltration gallery). Application of carbon amendment solution (initially 25:1 solution of potable water and food-grade molasses; later 15:1) to the infiltration gallery. Installation of a passive vapor extraction system.
Results to date:
A total of 30 injection events have taken place.
Since the start of injection activities, one well has had PCE decrease from 89,000 ug/L to below laboratory detection limits. The concentration of TCE has decreased from 26,000 ug/L to 1,200 ug/L. The concentration of daughter products have increased since the start of remediation activities which is to be expected.
Next Steps:
Continued groundwater monitoring for natural attenuation parameters.
5/2012 - Injection events have decreased groundwater concentrations, but the site has not met closure criteria. A new round of molasses injection is being conducted. Off-site migration of vapors is being investigated.
Cost to Design and Implement:
$281,802
|
Costs
Cost
for Assessment:
|
|
$101,900 |
Cost
for Operation and Maintenance:
|
|
$42,820
Total expended to date (2014) - $398,349 reimbursed plus $28,261 deductible |
Total
Costs for Cleanup:
|
|
|
Lessons Learned
Test the concrete/asphalt to determine appropriate means of disposal (non-hazardous or hazardous waste).
|
Contacts
|
