As the Tomblin administration considers a plan to allow natural gas drilling under the Ohio River, a major chemical maker in Marshall County has been fighting a proposal for hydraulic fracturing near its plant, citing a “near-catastrophic” gas-well incident last year that might be linked to geologic conditions beneath the river.

Atlanta-based Axiall Corp. has been waging a legal battle to stop Gastar Exploration from fracking natural gas wells that Gastar had drilled on Axiall property under leases Gastar obtained from PPG Industries, the former owner of Axiall’s chlorine and caustic soda plant at Natrium, located along the Ohio near the Marshall-Wetzel county line.

Axiall says it is concerned about a repeat of an August-September 2013 incident it blames on high-pressure fracking fluids being used by another company, Triad Hunter, to release natural gas from the Marcellus Shale at a well site on the other side of the river.

In court documents, Axiall lawyers say increased underground pressure from the fracking at Triad Hunter traveled under the river and somehow made contact with brine wells Axiall uses to obtain saltwater, one of the key materials used in its manufacturing process. Axiall says those pressures led to a blowout in which one of its brine wells at its plant “began spewing flammable natural gas.”

No injuries were reported, but parts of Axiall’s brine production were closed for more than six months for repairs and the company had to set up several large flares to burn off excess natural gas. Axiall was “fortunate to have been able to limit the environmental impact of the Triad Hunter incident and avoid bodily injury or loss of life due to a natural gas explosion or other disaster,” the company says in court records.