An equipment failure caused 259 barrels, or 10,878 gallons, of saltwater to release from a site about 7 miles north of Parshall, ND, Saturday, states Oil and Gas Division officials said.
EOG Resources reported the spill at a central tank battery site in Mountrail County.
The spill ended up contained on the location and workers were able to recover all but 10 barrels, or 420 gallons.
Crews will scrape off any saturated soil on the well pad location, said spokeswoman Alison Ritter. The cause of the spill was attributed to a fitting on a hose that failed, Ritter said.
Saltwater, or brine, is a byproduct of oil production. It is many times saltier than sea water and can easily kill vegetation.
A state inspector planned to visit the site to investigate.
The North Dakota Industrial Commission is considering proposed changes to state oil and gas rules, including a proposal to require oil sites to be surrounded by 1-foot containment berms to keep more spills on location.
Brine spills have been an issue throughout North Dakota. In just one case in October, after workers lost control of a well in northwestern North Dakota, oil and saltwater continued to spill across the area until workers were able to shut it down four days later, officials said.