Response Actions to Date
In 2005, a Phase I was completed for the shopping center. Based on the
identification of the dry cleaner, a Phase II investigation was added at the
Park Avenue $2.25 Cleaners (now Park Avenue $2.75 Cleaners).
In 2006, the Phase II Assessment identified environmental concerns
associated with the release of dry cleaning solvents. The soils below the
building were impacted and remedial actions were recommended.
In 2009, a soil vapor extraction system (SVE) was installed, but due to the
moisture content in the soil material the air flow was restricted, and it was ultimately
unsuccessful in remediating the solvent release. In 2010, a low-vacuum radon
blower was installed to vent the vapors from below the floor.
Between 2011 and 2014, work plans were developed and reviewed with alternating
approaches and assessment activities.
In 20015, Park Ave $2.75 Cleaners' consultant, AnteaGroup, completed assessment activities that identified
groundwater exceedances of MDEQ screening levels. Soil vapor monitoring points
installed at this time did not show exceedances of screening levels -
likely due to vapor pin leaks.
In June 2016, after indoor air samples exceeded the MDHHS Trigger Level for
evacuations, the MDHHS and MDEQ requested emergency support from EPA.
EPA Activity
Immediate actions involved the suspension of dry cleaning work, installation of exhaust units, optimization of air flow, and re-sampling of the indoor air and sub-slab soil gas (vapor pins).
EPA Emergency Response Branch is being assisted by EPA Environmental Response Team.
Indoor Air Samples
- The indoor air samples
collected from each business showed solvent levels below MDHHS'
chronic and acute levels. Likely due to the suspension of active dry cleaning.
Sub-Slab Samples
- Three vapor pins were installed between the shopping center and nearby residential homes - results were below MDHHS screening criteria.
- Several vapor pins were
installed inside the three businesses - results showed exceedances of screening
criteria in all three locations. One as high as 2,100,000 ug/m3.
Enforcement Activities, Identity of Potentially Responsible
Parties (PRPs)
EPA is working to identify responsible parties.
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