2.1.1 Narrative
EPA signed an Action Memorandum on August 5, 2015 to conduct a time-critical removal action. The Action Memorandum is posted to the Documents section of www.epaosc.org/exidebattery.
2.1.2 Response Actions to Date
During the reporting period, EPA conducted two rounds of post-installation proficiency sampling at one residence in March and August. The purpose of sampling was to demonstrate that the vapor mitigation system installed in February 2016 was working effectively.
In March, EPA detected tetrachloroethene (PCE) and TCE in both sub-slab and indoor air samples. Concentrations were below vapor intrusion screening levels (VISL).
In August, EPA detected PCE, TCE, trans-1,2-dichloroethene (DCE), and cis-1,2,-DCE in the sub-slab sample. TCE was detected above the sub-slab VISL of 70 micrograms per cubic meter (µg/m3) at a concentration of 200 µg/m3. The other compounds were below the sub-slab VISL and no compounds were detected in the indoor air sample.
Based on these results, EPA determined that the vapor mitigation system was working effectively, and no further work was necessary.
2.1.3 Enforcement Activities, Identity of Potentially Responsible Parties (PRPs)
Information on the PRPs and enforcement activities is contained in the Confidential Enforcement Addendum to the Action Memorandum.
2.1.4 Progress Metrics
Waste Stream |
Medium |
Quantity |
Manifest # |
Treatment |
Disposal |
Non-hazardous soil |
Solid |
1,497 tons |
Various |
NA |
Clinton County Landfill, Frankfort, IN |
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