![[logo] US EPA](http://www.epa.gov/epafiles/images/logo_epaseal.gif){kind=logo}
Status Report for the Week of March 24, 2008
TECHNICAL ASSISTANCE
Technical Assistance to Region II: In a continuing technical assistance
effort at the Cortese Landfill Superfund Site in Narrowsburg, NY, Steven
Acree (GWERD) and Dr. Bruce Pivetz (Shaw Env.) provided RPM Mark Granger
with review comments on the Source Characterization Report. The March
11, 2008, comments note that the report provides a large amount of data
and information for characterizing contaminant distribution at the site.
The overall conclusion is that the contaminants are widely spread with a
significant mass in the source area. It was suggested that the
quantitative results of contaminant mass and calculated parameter values
should be considered estimates due to the assumptions and extrapolations
used in the calculations.
(06-R02-002)
(S. Acree(GWERD)580-436-8609)
Technical Assistance to Region IX: On March 10, 2008, Dr. Eva Davis
(GWERD) provided RPM Gary Riley with a review of a variety of documents
relating to whether thermal remediation may be applicable to recover
PCBs present in the subsurface at the Westinghouse Sunnyvale Superfund
Site in Sunnyvale, CA. It appears that there are areas of heavy PCB
contamination where in-situ thermal remediation may be able to recover
significant amounts of the contamination. Information was provided on
the properties of the contaminants when considering different types of
thermal remediation, a description of the in-situ technologies that have
been used to address PCB-contaminated soil, a conceptual description of
how they might be applied at the Westinghouse Sunnyvale Site based on
site characteristics, and recommendations on additional information that
would aid in evaluating the use of a thermal technology at this site.
(07-R09-005)
(E. Davis(GWERD)580-436-8548)
Technical Assistance to OSRTI: On March 11, 2008, Dr. Ann Keeley
provided Linda Fiedler with review comments on the Draft
Technical/Regulatory Guideline "In Situ Bioremediation of Chlorinated
Ethene: DNAPL Source Zones." Although many of the suggestions dealt
with editorial issues, the more salient comments concerned technical
concepts such as the benefit of obtaining geochemical data, and the
ratio of electron donors to the mass of chlorinated solvent. It was
also suggested that a section be added concerning the value of
pre-demonstration tracer studies.
(Misc.)
(A. Keeley(GWERD)580-436-8890)