Travellers are being warned they could face “significant delays” at Vancouver International Airport over the Labour Day weekend.

The union representing some YVR workers has announced it has served 72-hour strike notice for 300 employees of the Vancouver Airport Authority.

“We felt we had no choice,” said Bob Jackson, regional executive vice-president of the Public Service Alliance of Canada, quoted in a media release. “YVR is demanding concessions but at the same time are budgeting millions of dollars per year on capital projects. Our members find this unacceptable.”

The union has accusing the Vancouver Airport Authority of attempting to “create a two-tier wage system by creating a new class of ‘seasonal’ workers”, according to the release.

The employees threatened to strike provide services including emergency response, runway maintenance, passenger loading operations, and customer care, among others.

Negotiations involving federal mediators are scheduled for August 28 and 29.