FERNANDINA BEACH, Florida — The city of Fernandina Beach is bracing for a legal showdown with Rayonier Advanced Materials (RYAM), which runs a pulp mill in the city. RYAM has filed a federal lawsuit alleging unfair treatment after Fernandina Beach rejected its plans for a new bioethanol facility. …In December, the company proposed a plan to convert some of the waste from its operations into bioethanol, a renewable fuel. But the city denied the proposal, citing concerns over potential health risks for residents. The city also argued that the project didn’t meet local zoning rules, labeling it as chemical manufacturing instead of a pulp operation. …Now, the company is taking legal action, asking the court to overturn the city’s decision. No court date has been set. Along with a looming legal battle, there is a bill being considered in the Florida Senate that could reopen the door for RYAM’s bioethanol plant.