More
tests needed at Vernay before cleanup can begin
Still in the first
phase of the environmental cleanup schedule that Vernay Laboratories agreed
to under the supervision of the U.S. EPA, Vernay opted not to begin soil
remediation at its Dayton Street facility, saying it needed more information
on the extent of the contamination, an agency official said this week.
Since Vernay signed
the “Administrative Order on Consent” with the U.S. Environmental
Protection Agency last September, the remediation process has proceeded
right on schedule, Trish Polston, the EPA project manager, said. In February
Vernay completed the first quarterly round of groundwater and soil testing
for potentially harmful chemicals of concern (COCs) and submitted a progress
report, which is available in the Yellow Springs Library. With these results
and some previous data the company collected under supervision by the
Ohio EPA from 1999, the U.S. EPA was able to generate a map of the contamination
area, published in a fact sheet that was distributed in June.
According to the
U.S. EPA’s remediation update from June, the estimated contamination
plumes for both trichloroethylene (TCE) and tetrachloroethylene (PCE)
form an oval shape stretching eastward from Vernay’s facility past
Wright Street, following the general eastward flow of groundwater in that
area. A 1,2-dichloropropane plume is much smaller and is contained on
Vernay’s property.
Studies also detected
PCE, TCE and toluene in the stormwater drainage area located at the northeast
corner of Vernay’s site on Dayton Street, which flows in the direction
of the unnamed stream to the northeast of the facility. Though other volatile
organic compounds and metals such as freon, cis-1,2-dichloroethene and
chromium were detected on and around the site, the chemicals that formed
the plumes were the most extensive, Polston said.
Most of the contamination
found so far appears to be concentrated in the upper portion of the Cedarville
Aquifer, the 50-foot layer of soil and rock closest to the surface. Vernay’s
quarterly progress report from April also reveals detections of most of
the COCs in the middle portion of the aquifer and some in the surface
water around Vernay’s plants, though in relatively small proportions.
None of the deeper
100-foot wells testing the middle and lower portions of the Cedarville
aquifer have been installed off site yet, but the company is currently
in the process of using geoprobes to find the best spots for six new deeper
wells along Wright Street, Omar Circle and on private property to the
southeast of the facility, Doug Fisher, Vernay’s environmental affairs
and safety manager, said on Tuesday.
Vernay submitted
its third quarterly progress report on July 15, but the results have not
yet been made available to the public. Fisher said that the report confirmed
the boundaries of the plume generated by the first rounds of testing.
The U.S. EPA expects to distribute another fact sheet next month that
would summarize the July progress report.
“The investigation
is proceeding on schedule and in compliance with the administrative order,
and we’re already beginning work that needs to be completed in September,”
Fisher said. “The order is proceeding right as we had expected.”
Vernay has been investigating
its facility for toxic chemicals since the early 1990s. In early 2002
Vernay settled a lawsuit with a group of neighbors over the contamination
of the site, giving the neighbors compensation and oversight of the company’s
cleanup. Vernay later signed the agreement with the U.S. EPA to remediate
the contamination in the area of its Dayton Street facility.
Fisher said that
Vernay has allocated a good deal of its resources toward remediating the
contamination on its property, which company officials have said was one
of the reasons Vernay decided last summer to close down its Yellow Springs
manufacturing operations. The largest local plant, Plant 3, closed at
the end of last month.
“We’ve
spent a significant amount of money in this process for a company our
size,” Fisher said. When asked how much money Vernay has spent on
the process Fisher deferred to Tom Allen, the company’s president
and CEO. Allen was out of town and unavailable for comment.
At least one U.S.
EPA official has said that Vernay did not have to close the local plants
to facilitate the cleanup.
The EPA’s cleanup
schedule predicted Vernay might be ready to start treating contaminated
soil last month. However, pilot studies comparing the various possible
treatment methods need to be completed to determine the best cleanup strategy,
Polston said.
“We need a
better understanding of what’s going on. We can’t make any
general conclusions,” she said.
In addition to the
27 monitoring wells around the facility, Vernay will install several more
monitoring wells and geoprobes on and off the property, near Wright Street
and Omar Circle, within the next few months to better determine how wide
and how deep the plumes are. Vernay will also install wells on Dayton
Street to monitor the stormwater basin, where additional contamination
has been detected.
As an additional
interim remediation measure, Vernay installed in January a second capture
well at the northeast corner of its facility that would, like the first
capture well at the southeast edge of the company’s property, pump
contaminated groundwater through it to be treated and discharged through
the Village sewage lines. The pump wells help slow the spread of contamination,
Polston said.
If the cleanup effort
stays on schedule, the results of all the upper levels of groundwater
and soil testing should be completed by June 2004, and part of the soil
treatment should be underway, Polston said. If contamination is found
to be deeper than the Cedarville aquifer, groundwater and soil tests will
be initiated in the ground level below, called the Brassfield aquifer.
—Lauren
Heaton
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