An Arkansas-based company has obtained a federal permit to operate a mobile hazardous-waste incinerator but has no immediate plans to place it in Utah, a spokesman said.

Hugh Earnest, spokesman for Environmental Systems Co. of Little Rock, said Wednesday the company was granted the federal permit to burn polychlorinated biphenyls in March. PCBs, banned as suspected carcinogens, are found in the heavy, oily fluids of old electrical transformers and hydraulic systems."We've made no basic decision as of yet," Earnest said. He said the federal Environmental Protection Agency permit does not specify Utah as the site.

Last fall, the company was considering a site near Grouse Creek in the western end of Box Elder County, where the proposal stirred heavy debate.

Kay Modi, the EPA's regional PCB coordinator, said ENSCO also must obtain regional site approval from the EPA before it could operate in Utah.

"To date, ENSCO has not notified EPA where it intends to locate. It's still very much up in the air," Modi said.

The federal permit will enable ENSCO to operate the incinerator anywhere it can obtain regional authorization. Though the incinerator is classified as mobile, Modi said ENSCO will be required to meet the same regulatory standards of a stationary disposal unit.

"They're essentially designed the same way," Modi said.

The PCB incinerator would be subject to the Toxic Substance Control Act and the regulations of the Utah Bureau of the Air Quality.

Bill Sinclair of the Utah Bureau of Solid and Hazardous Waste said he was aware ENSCO received a federal permit to operate a PCB incinerator, but the state had not been notified of any plans to begin incineration activity in the near future.

Wherever ENSCO places the mobile burn unit, the company will spend time educating the community about its operations, Earnest said.