Yesterday after decades of delays MDEQ agreed (EPA has been silent) with Dow Chemical and settled on 250 ppt for dioxin in Midland soils. This web site is dedicated to EPA activities along the river system but we cannot ignore the major deviation from the state’s standard of 90 ppt being used in Midland.
Lone Tree Council acknowledges the progress–hell, even talking about remediation in Midland has been taboo for decades. Concerns and comments were submitted to MDEQ in April from the Ecology Center and Lone Tree Council. Skepticism is warranted given the 250 ppt settled on is based on a cancer potency value that is half as protective as the number used at the national level.
In addition, just one day after the announcement of the 250 ppt use for dioxin in soils, EPA released their reference dose for dioxin in soils and the reference dose translates to 50 ppt for non cancer effects. Given EPA active involvement and oversight for decades in Midland, Dow Chemical’s backyard, the agency’s public absence on the 250 ppt did not go unnoticed. More on this in the near future.