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Status Report for the Week of March 3, 2008
TECHNICAL ASSISTANCE
Technical Assistance to Region IX: On February 26, 2008, Dr. Randall
Ross (GWERD) and Dr. Milovan Beljin (Shaw Env.) provided RPM James Chang
with review comments on a model verification pump test simulation
comparison at the George AFB in Victorville, CA. Of the 13 aquifer
tests evaluated, 10 are poor and unstable. They should not have been
used for estimating aquifer parameters and are not useful for model
verification. The results of the remaining three wells were useful for
identifying areas of the model that should be re-examined. The most
significant conclusion is that the model cannot be considered verified.
This is not to say that the model is bad, but rather that at this point
there are no appropriate data available for model verification. The
goal should be to collect such data in the future and to revisit the
model input data.
(05-R09-004)
(R. Ross(GWERD)580-436-8611)
Technical Assistance to Region IV: During February 12-13, 2008, Dr.
Scott Huling (GWERD) and Dr. Bruce Pivetz (Shaw Env.) provided technical
support to RPM Galo Jackson regarding in-situ chemical oxidation (ISCO)
at the Southern Solvents Superfund Site in Tampa, FL. Their visit to
the site was coordinated with the deployment of pilot-scale ISCO. The
oxidant injection activities followed a treatability study by Drs.
Huling and Pivetz at GWERD where laboratory results were used to design
the amount and concentration of oxidant to be injected, and to develop
an injection strategy. Direct push technology was used at the site to
inject sodium permanganate into PCE contaminated aquifer material 8-35
feet deep. The Alaric Superfund Site was also visited where details of
an ISCO strategy were discussed to target the oxidation of a localized
pocket of chlorinated VOCs.
(00-R04-005) Southern Solvents S/F Site
(07-R04-004) Alaric S/F Site
(S. Huling(GWERD)580-436-8610)