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Study
6.
Extricate client from PRP Group on Puente
Valley Superfund Site.
Objective. To extricate client from PRP Group
on Puente Valley Superfund Site .
Site Information:
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Site
previously used chlorinated solvents.
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Soils were
remediated.
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Chlorinated
solvents detected in groundwater beneath the site.
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Groundwater
at >70ft bgs.
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Site named
to PRP Group with $2.7 million plus in allocated costs to our client. |
Sampling Strategy
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Evaluated
site-specific and regional groundwater contaminant plumes.
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Performed
chemical fingerprinting of site chemicals and regional contaminants (all
chlorinated solvents).
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Evaluated
residual mass in vadose zone beneath the site.
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Evaluated
efficiency of onsite remediation system. |
Results
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Demonstrated
that the groundwater contamination beneath our client's property was not part
of the regional contaminant plume, even though it had some of the same
chemicals.
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Demonstrated
that the onsite contamination had been successfully cleaned up.
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RWQCB
concurred and issued a No Further Action Letter.
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The "No
Further Action" letter and our report were used to negotiate a de minimus cash out settlement
for our client with USEPA Region IX. |
For more
information about Risk-Based Decisions, Inc. call (916) 923-0570,
send
email or complete
our
online information request form.
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