Exact(15)
Mr. Cahill did not use the word dredging; instead, he called for "active remediation," a term widely assumed to mean dredging.
But the study also says that dredging and other so-called active remediation plans are potentially dangerous, too, because no method or technology can eliminate the possibility that some dredged-up pollution could leak back into the water.
By contrast, in five years of active remediation (excavation and biopile treatment) contaminant levels decreased by a factor of four.
The project progressed through initial site assessment and natural attenuation, passive groundwater management, then active remediation and the managed reuse of soil.
Beginning in the late 1980's the NAPL plume started to shrink as a consequence of NAPL dissolution exceeding replenishment and due to active remediation.
Sites chosen for this study had not undergone active remediation ensuring no artificial influence to the natural attenuation processes that controls the migration and dissipation of MTBE.
Similar(45)
The implementation of an active groundwater remediation strategy, based on a comprehensive pump and treat scheme, now prevents the migration of the dissolved contaminants into the marine environment.
In particular, this paper surveys the prospects and challenges of detumbling large debris objects near Geostationary Earth Orbit for active debris remediation, and investigates if such electrostatic tractors are suitable for small asteroids being considered for asteroid retrieval missions.
Responding to all the bummer news, prime minister Shinzo Abe announced his government would be more "active" in the remediation process, setting aside 47 billion yen (almost $500 million) for cleanup, including 32 billion yen for the construction of a 1.4 km long underground ice wall to block the water used to cool the damaged reactors from mixing with groundwater.
Responding to all the bummer news, Japanese prime minister Shinzo Abe announced his government would be more "active" in the remediation process, setting aside 47 billion yen (almost $500 million) for cleanup, including 32 billion yen for the construction of a 1.4 km long underground ice wall to block the water used to cool the damaged reactors from mixing with groundwater.
Kinetic modelling is required only in active (engineered) bio-remediation cases, with high velocities (e.g., near pumped wells), and for short distances from the source.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com