Cotter cleanup reduced in scope

Source: Pueblo Chieftain (CO), October 17, 2012
Posted on: http://envfpn.advisen.com

A new cleanup standard for molybdenum levels in groundwater has drastically reduced the size of a cleanup area contaminated by the Cotter Corp. Uranium Mill.
The mill and a portion of the neighboring Lincoln Park community became a part of a federal Environmental Protection Agency Superfund cleanup site in 1984 after molybdenum and uranium contamination seeped from unlined tailings ponds into the groundwater.
As of Feb. 1, the state Water Quality Control Commission standard for cleanup of molybdenum in water will be 210 micrograms per liter, up from the previous standard of 35 micrograms per liter, according to a fact sheet issued by state health officials Tuesday.
Despite the change, Cotter will be required to clean up groundwater at any reading above 100 micrograms per liter because that standard is required by the Nuclear Regulatory Commission. A map included with the fact sheet shows two small plumes targeted for cleanup.
“This means that 16 wells previously included in the more conservative standard are now outside the plume boundary. Only six wells are inside the Lincoln Park plume,” according to the fact sheet.
“I object to this change in the moly standard for groundwater as I believe from studies I’ve read that it will have an adverse impact on health (of people) through bones, gout and arthritis when drinking well water at this level,” said Sharyn Cunningham, co-chair of Colorado Citizens Against Toxic Waste. “This will allow Cotter to avoid protective cleanup.”
The fact sheet indicates the most common negative health effect from consuming too much molybdenum for a long period of time is gout.
Wells that are located within the contamination area are not being used for human consumption. Instead residents have been hooked up to the city water supply.
“Groundwater contaminate levels in most areas have been decreasing even though there is no active groundwater cleanup action in place in the area,” according to the fact sheet.
 

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