Thick white smoke could be seen for miles, pouring out of a salt storage warehouse along Birch Street in Scranton Wednesday morning. Firefighters responded to the Schoenberg Salt Warehouse just before 11. Fire officials said battling the flames was made even more difficult because of what is stored inside the facility that has salt packaged for grocery stores and a lot of cardboards. The fire chief says all workers at the plant made it out safely. Some nearby homes and businesses were evacuated, and students from nearby South Scranton Intermediate School were dismissed just before noon because of air quality concerns. The Wright Center on South Washington Ave. evacuated employees and closed their primary care center to patients shortly after the fire began…