The National Labor Relations Board has found that Columbia College Chicago violated federal laws by refusing to bargain with the part-time faculty union at the college and hand over information requested by them. In a ruling Tuesday, Robert Ringler, an administrative law judge, ordered the college to bargain in good faith with the union and to provide back pay to part-time faculty members in the department of humanities, history & social sciences affected by a 2010 decision to reschedule classes. The Part-Time Faculty Association at the college, also known as P-fac, is affiliated with the National Education Association. Diana Vallera, P-fac’s president, called the decision a victory for part-time faculty members. “In this case, Judge Ringler has ruled that Columbia College not only mistreated its faculty but also violated federal labor law,” she said.