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Status Report for the Week of March 10, 2008
TECHNICAL ASSISTANCE
Technical Assistance to Region III: On March 4, 2008, Dr. John Wilson
(GWERD) provided RPM Â Romuald Roman with review comments of three
documents associated with the Ohio River Park Superfund Site in Neville
Island, PA. In general, it was found that the behavior of benzene and
trichlorophenol contamination in ground water is behaving as expected,
and monitored natural attenuation as a remedy meets the expectations of
the ROD. Future monitoring plans were discussed and a statistical
analysis was provided with respect to the concentrations of benzene
meeting the MCL in 30 years of monitoring.
(03-R03-002)
(J. Wilson(GWERD)580-436-8534)
Technical Assistance to Region VI: On March 4, 2008, Dr. John Wilson
(GWERD) provided RPM Petra Sanchez with comments on a draft of field
test plan results report for the North Railroad Avenue Plume in
Española, NM. The comments were essentially responses to specific
questions dealing with such issues as the addition of electron donors,
results of sampling events, interpretation of tracer tests, and a
critique of the conclusions and recommendations.
(07-R06-002)
(J. Wilson(GWERD)580-436-8534)
Technical Assistance to Region IX: On March 4, 2008, Dr. John Wilson
(GWERD) provided RPMÂ Gary Riley with comments on a "Report of Studies to
Optimize Current Site Remediation Activities" and "Five-Year Groundwater
Status Report" for the Westinghouse Sunnyvale Superfund Site in
Sunnyvale, CA. The response focused on four specific questions
including MNA as an appropriate remedy to study for the site,
ground-water sampling methods and locations, the potential for meeting
intended goals, and a proposed plan to abandon some wells. The comments
predominantly centered on MNA as a remedial approach with a detailed
discussion of its effectiveness on each of the contaminants of concern.
(07-R09-005)
(J. Wilson(GWERD)580-436-8534)
Technical Assistance to Region IX: On March 5, 2008, Steven Acree
(GWERD) and Dr. Robert Ford (LRPCD) provided RPM David Seter with review
comments on a remedial investigation work plan for the Yerington Mine
Site in Yerington, NV. In general, the issues discussed included the
advantages of multi-well pumping tests in evaluating the pump-back
system, monitoring well sample collection, additional ground-water
characterizations, well locations, field sampling and analysis plans,
and geochemical processes affecting release mechanisms. A number of
specific issues related to the text were contaminant transport,
mineralogical characterization, sequential extraction solutions,
borehole locations, and data reporting.
(01-R09-004)
(S. Acree(GWERD) 580-436-8609)
(R. Ford(LRPCD) 513-569-7501)