Portland Harbor - Dispute Decision on Background (Remedial Investigation (RI) Section 7)

Rick Albright, Director of the Office of Environmental Cleanup for EPA Region 10, has issued his decision on a dispute raised by the Lower Willamette Group regarding the background level determination at Portland Harbor. The decision is attached below.

In summary, Albright upheld the EPA determination of background levels.

"This letter sets forth my determination with respect to the Lower Willamette Group's August 26, 2014,
request for dispute resolution regarding EPA's August 12, 2014, decision that certain outlier sample
results would be excluded from the dataset used for calculating background sediment concentrations for
the Portland Harbor Superfund Site (Site), and the methodology by which EPA excluded such data. In
summary, I hereby determine and direct LWG to:
1. incorporate the changes EPA made to Section 7 of the draft RI into the final draft RI report;
2. complete background threshold values for the other 23 contaminants by use of the methodology
EPA employed to determine background sediment concentrations for the contaminants of
concern; and
3. submit background calculations for the other 23 contaminants to EPA within thirty days of the
date of this decision."

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2015-03-24 Portland Harbor - Dispute Decision on Background (RI Section 7).pdf5.8 MB