State Coalition for Remediation of Drycleaners Site Profiles
Hayden Island Cleaners, Portland, Oregon
Description
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| This is an active perchloroethylene (PCE) drycleaning facility that has been in operation since 1975. It is located in a commercial setting adjacent to the Columbia River. |
Contaminants
Contaminants present and the highest amount
detected in both soil and groundwater.
| Contaminant | Media | Concentration (ppb) | Nondetect |
|---|---|---|---|
| cis-1,2-Dichloroethene | groundwater | 3,400 ppb | |
| Tetrachloroethene (PCE) | groundwater | 1,230,000 ppb | |
| Trichloroethene (TCE) | groundwater | 1,000 ppb |
Site Hydrology
| Deepest Significant Groundwater Contamination: | ||
| Plume Size: | ||
| Average Depth to Groundwater: | 7ft |
Lithology and Subsurface Geology
Upper surficial aquifer |
silty sand Depth: 20-40ft bgs 20ft thick Gradient: 0.001ft/ft |
Pathways and DNAPL Presence
 Groundwater SedimentsSoilDNAPL Present |
Remediation Scenario
Cleanup
Goals: |
Site cleaned up using Oregon's Risk Based Concentrations (RBCs) as outlined at: www.deq.state.or.us/wmc/tank/rbdm.htm |
Technologies
In Situ Bioremediation |
Date implemented: Final remediation design: Results to date: Next Steps: Cost to Design and Implement: |
Costs
Cost
for Assessment: |
$70,000 | |
Cost
for Operation and Maintenance: |
$53,000 | |
Total
Costs for Cleanup: |
$202,000 |
Lessons Learned
|
1. Location of site next to river complicated the hydrogeology of the site. River stage and tidal fluctuations accounted for flow reversals at the site. In addition, the timeframe of the injection occurred during the slowest groundwater transport period which required several months for HRC™ enhanced remediation to be noticed. 2. HRC was injected along two transects to account for groundwater flow reversals. The injections were designed to provide an engineered "treatment wall" or zone prior to off-property and surface water discharge migration. 3. A steam-cleaner is very helpful with clean-up of HRC product. Cleanup should commence the same day as injection activities. Waiting until the following day or at the end of injection event necessitated additional labor/time. 4. Analysis of acid in water sooner would have helped facilitated the amount of HRC remaining in the subsurface. 5. Regenesis offers onsite assistance and instruction during injection activities. Their guidance was very useful during the initiation of the project. |
Contacts
| David Anderson Oregon DEQ 811 SW 6th Portland, OR 97204 (503) 229-5428 anderson.david@deq.state.or.us |
