Friday, January 6, 2012

Latest Cleanup Plan for Texarkana Site May Stick

The latest Environmental Protection Agency record of decision on the Texarkana Wood Preserving Site modifies the earlier RODs from 1993, 1998 and 2010. The ROD outlines the processes that are used to cleanup the list of environmental issues at a Superfund site.

The new remediation plan is to solidify the creosote contamination in the soil right where it lies. Contaminated soils will be removed to a depth of two feet and then consolidated on-site. Deep groundwater contamination will continue to be monitored to see if and when it migrates toward sensitive areas. The shallow groundwater contamination had not been addressed in earlier decisions, other than to monitor to make sure it didn’t move into nearby Day Creek. But now, that shallow contamination will be monitored for natural attenuation where the materials break down over time and are then absorbed by naturally occurring processes.

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