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| Site Profiles - View |
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General Information
| Site Name
and Location: |
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Former Serry's Cleaners
Corvallis, Oregon, United States
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Description:
Historical activity that resulted
in contamination. |
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Serry's Cleaners operated at the site from the mid 1960s to 2001, when the cleaners closed, and the building was converted to an Asian food market. Historical spills and/or leaks have resulted in contamination of the shallow soil and shallow groundwater beneath and surrounding the building. |
Contaminants:
Contaminants:
Contaminants present and the highest amount
detected in both soil and groundwater (please avoid giving ranges). |
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| Contaminant |
Conc in GW |
Conc. in Soil |
| cis-1,2-Dichloroethene |
3100 µg/L |
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| Tetrachloroethene (PCE) |
22,000 µg/L |
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| trans-1,2-Dichloroethene |
56 µg/L |
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| Trichloroethene (TCE) |
1,700 µg/L |
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| Vinyl Chloride |
72 µg/L |
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Other Contaminants Present:
Indicates what other contaminants were found on-site |
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| Deepest Significant
Groundwater Contamination: |
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| Plume Size: |
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150 ft X 90 ft X 30 ft |
Site Hydrology:
Depth
to Groundwater: |
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10 ft |
Lithology
and Subsurface Geology:
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Clayey silt to 15 ft
Stiff silty clay with interbeds of fine sand, 15-25 ft.
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Conductivity: |
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Est. 4 E-6 ft/dy ft/day |
Gradient: |
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0.01 ft/ft |
Pathways and DNAPL Presence:
Pathways: |
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Groundwater
Soil
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DNAPL Presence: |
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No |
Remediation Scenario:
Cleanup
Goals: |
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Reduce or eliminate the threat from volatilzation from soil and groundwater to indoor air at the site building (Asian food market) and adjacent residential buildings.
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Technologies:
Technologies
Used: |
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- In Situ:
- Bioremediation
- Zero Valent Iron
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Other
technologies used: |
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In-Situ Integrated biological and chemical reduction using the Adventus Americas' product EHC injected in 32 locations in a grid over an area of about 800 square feet |
Why
the technology was selected: |
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DEQ and Adventus Americas teamed to pilot the effectiveness of EHC to meet the remediation objectives. Adventus providing its product at a reduced rate, and EPA Grant funding, helped reduce DEQ's costs. |
Date
implemented:
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Injections completed in August 2006
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Final
remediation design:
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The need for further remediation at the site will be based on performance monitoring of the EHC injections, and the future use of the property. |
Results and Next Steps:
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Results to date:
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Demonstrated that EHC (and other products) can be injected into fine grained soils at the site.
One year after the EHC application, total chlorinated VOCs decreased by greater than 99% at the four monitoring well sampling locations. PCE and TCE have reduced to concentrations below the detection limit of 1 ppb at all locations. For more information visit the DEQ project web site at www.deq.state.or.us/Webdocs/Forms/Output/FPController.ashx?SourceId=3113&SourceIdType=11
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Next Steps:
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Performance monitoring to monitor product longevity and to watch for rebound effects. Performance monitoring will provide information that will be used for future project decision-making. Possible air sampling or soil gas sampling to demonstrate the reduction of threat to indoor air receptors from vapor intrusion. |
Costs:
Cost
for Assessment:
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$70,000 |
Cost
to Design and Implement:
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$53,000 Work plan and implementation
$10,000 Adventus Americas (EHC and engineering support)
$2,000 Final pilot study report |
Cost
for Operation and Maintenance:
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$26,000 Monitoring and reporting for 14 months
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Total
Costs for Cleanup:
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Lessons Learned:
Lessons
Learned:
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1. It was determined that Adventus' EHC can be injected into fine grained soils using the Geoprobe Pressure Activated Injectin probe with a high pressure grout pump, and be effectively distributed to treat shallow groundwater at the site.
2. The EHC treatment has been effective in reducing VOC concentrations by 99% in the treatment zone, with little generation of cis-1,2 DCE or vinyl chloride.
3. High pressure injections in relatively shallow fine grained soils can result in surfacing of the injectate. Pavement in the injection area can mask surfacing and can be damaged by mounding.
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Contacts:
Site Specific References:
Images:
Profile last updated on Nov 07, 2007
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