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47-039-05714
We
examined this site in November 2008
and found that the condensate storage tank did not have the
required secondary containment dike. We also noted areas on
the pad that were sparsely vegetated. At that time the pad
was being used to park equipment and materials being used
on a local waterline project and the pad didn't receive full
study.
We
returned to the site in July 2009 with one of the surface
owners and immediately noticed large pieces of thick black
plastic sticking up from the ground. We took two soil samples
in a bare area and returned to the site to begin a full assessment.
We
found a perimeter of exposed black plastic that was roughly
15 by 100 feet. At the western end of the perimeter there's
a large area bare of vegetation. We took soil samples through
the perimeter and outside at each end. Within the perimeter
of exposed plastic soil tests all showed elevated chloride.
At the same location as sample S5 we took a soil sample for
laboratory analysis. A blog post gives The
Numbers.
Using
the state's, EPA's and other soil screening levels, we found
arsenic's concentration showed that contamination could adversely
affect groundwater and local residents' health. We also found
that concentrations of arsenic and lead could have a negative
ecological effect.
The
full Environmental Assessment
presents the laboratory results and analysis of soil screening
levels.
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