SIDNEY, Neb. (AP) — Two groups say the Nebraska Oil and Gas Conservation Commission has violated state open meeting laws, and they want the state attorney general to void any action stemming from the commission’s March 24 hearing on a proposed Sioux County wastewater disposal well.

Bold Nebraska and the Nebraska Sierra Club filed a complaint Tuesday with the office of Attorney General Doug Peterson, asking for an investigation. Ken Winston with the Nebraska Sierra Club says the commission didn’t follow its own rules and state law.

Terex Energy Corp, of Broomfield, Colorado, wants to truck salty groundwater and chemical-laden fracking wastewater that result from oil searches and production to a ranch north of Mitchell.

Representatives for the commission and the attorney general didn’t immediately return requests for comment Wednesday from The Associated Press.