Consumer affairs veteran Samuel A. Simon will leave his job as president of the Telecommunications Research and Action Center to start his own consulting business in Washington. Simon, a lawyer who started as an attorney with consumer advocate Ralph Nader's first interest group in 1970, the Public Interest Research Group, has headed TRAC since 1978.

Clean Sites Inc., a 1-year-old nonprofit group focused solely on accelerating the environmentally sound cleanup of hazardous waste sites, has made four recent appointments, drawing on both industry and government to complete its management team. Charles J. Prizer, after a long career with Rohm and Haas, a Philadelphia chemical and manufacturing firm, will become executive vice president, effective on Sunday. He succeeds John A. Klacsmann, who is retiring. Earlier, CSI made the following appointments: Eugene Berman, a former senior environmental attorney for Du Pont Co., to vice president in charge of directing preliminary settlements between the government and responsible parties; Anthony C. Liotta, formerly an attorney for Justice Department, to general counsel, and George Murray, previously a vice president at Dow Engineering Co., to vice president in charge of managing cleanup projects. Clean Sites Chairman Russell E. Train, former head of the Environmental Protection Agency, made the annoucements.