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Status Report for the Week of January 21, 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 comments on the applicability of surfactant-enhanced in-situ
chemical oxidation (S-ISCO) technology to remediate subsurface
NAPL-phase contamination. S-ISCO is a newly developed technology that
combines the essentially simultaneous injection of an oxidant
(persulfate), an activator for the persulfate oxidant (such as
Fe(II)-EDTA), and a surfactant/cosolvent mixture or surfactant (various
proprietary formulations). The pros and cons of the merits of the
technology were discussed at considerable length. Essentially, the
January 2, 2008, comments recommended that further research, field
applications, reporting, and critiquing should occur before it can be
considered to be a widely accepted emerging technology.
(06-R02-002)
(S. Acree(GWERD)580-436-8609)
Technical Assistance to Region III: On January 14, 2008, Dr. Eva Davis
(GWERD) provided RPM Debra Rossi with comments on a pre-final design for
Operable Unit 3 at the Maryland Sand, Gravel, & Stone Site in Elkton,
MD. The comments focused on the proposed ex situ thermal desorption
treatment of contaminated soil. Concerns were expressed with respect to
the lack of sampling of excavated soil, both with respect to the amount
and types of contamination. Another concern was the volatilization of
contaminants during excavation. It was suggested that real time
monitoring of air concentrations be carried out to ensure that site
workers and off site residents are not exposed to unacceptable
concentrations of VOCs. Specific comments were offered in a number of
areas including the possible presence of NAPL, soil sampling techniques,
and the proposed soil "shakedown" test to confirm that the technology
can meet soil cleanup standards.
(00-R03-002)
(E. Davis(GWERD)580-436-8548)