THE BRONX - The spokesperson for the union representing Co-op City building workers says it's very unlikely they will strike.Riverbay Corporation, the manager of the complex, says it has reached a tentative deal with Local 32BJ of the Services Employees International Union. The deal, according to Riverbay, would give workers a raise, pension and health care coverage.About 500 workers would be covered under the deal. An announcement was expected to made on Friday about the tentative deal.