State officials are investigating about 100 filter socks that were improperly disposed of in north Williston, the Department of Mineral Resources said Thursday.
Clean-up is expected to begin today to remove the new and used filter socks discovered by a citizen who reported the oilfield waste to authorities on Monday, said department spokeswoman Alison Ritter.
Used filter socks, a waste product of oil and gas production, contain low levels of naturally occurring radioactive waste and need to be transported out of state for disposal under current rules.