| Milestone |
Date(s) |
| Initial assessment completed |
12/18/2008 |
| Proposed to the National Priorities List |
05/17/2018 |
| Finalized on the National Priorities List |
09/13/2018 |
| Remedial investigation started |
08/08/2019 |
| Remedy selected |
June 2023 |
| Remedial action started |
Not yet achieved |
| Construction completed |
Not yet achieved |
| Deleted from National Priorities List |
Not yet achieved |
| Most recent five-year review |
Not yet achieved |
| Achieved sitewide ready for anticipated reuse |
Not yet achieved |
Last Action Completed by EPA on Site
In summer 2020, EPA completed remedial investigations as well as two field-scale pilot studies to assess soil vapor extraction (SVE) and an in-situ treatment barrier as potential methods for addressing and lowering soil and groundwater contamination at the site source region. For the SVE system, one extraction and three observation wells were constructed to evaluate contamination concentrations before, during, and the end of the test cycle. The distances to place the proposed SVE wells was also evaluated.
For the in-situ treatment barrier, two permanent wells were installed to conduct baseline, groundwater sampling and analyses, and a water injection test, to measure the effective dose of remedial amendments needed to inject into the groundwater table. The results were also used to determine the optimal spacing and configuration to install the proposed groundwater remedial infrastructure. Thirty three injection points were constructed and a solution of activated vegetable oil, to grow anaerobic microbes, and fine-iron filings, to embed in the groundwater table, was injected during the pilot study to begin the groundwater remediation process at the most contaminated region at the site.
A summary of RI activities, results, and other pertinent site information is documented in the focused feasibility study report that was completed in March 2021. The information in the FFS report will be used to support an Interim Record of Decision, the document that will describe the proposed, temporary remedy and technologies that will be implemented to begin addressing and lowering contamination in the soil and groundwater at the site.