THE increased terror threat level has forced Orica Yarwun to review its security and safety procedures.
The ammonium nitrate plant creates explosives used in the mining industry and has stringent security policies.
On September 15 the Department of Explosives Inspectorate issued a security alert to all operations using security-sensitive explosives.
An Orica spokesperson said stringent measures had been reviewed following the recent announcement by the Australian Government, in which the national terrorism threat was increased from medium to high.
"Orica will work closely with all relevant authorities to ensure safety and security of the Orica supply chain," the spokesperson said.
"Orica places the highest priority on ensuring safety and security."
A Department of Natural Resources and Mines spokesperson said the alert included mine sites, manufacturers of explosives including ammonium nitrate, and other licensed operators that store, transport or use explosive materials.
"Security risk assessments and security plans are required of all these licensed operators and these plans are regularly reviewed," the spokesperson said.
"Security mitigations must be in place at all times."