Harold C. (Sam) Ralston, 56, of 600 Florida Ave., Chester, died of an apparent heart attack early this morning while at work at the Kopper's plant in Monaca. He was employed as a foreman at the boiler house and watch engineer. Mr. Ralston was born Oct., 24, 1911, in what was then Hollidays Cove, W.Va., son of the late Frank Ralston and Mary Clary Ralston. He resided in the Chester area for about 24 years. He is survived by a daughter, Mrs. Jack (Gayle) Anderson of Chester; a son, Donald A. Ralston of Paris, Pa.; two brothers, Leroy Ralston of Charleston, W. Va., and Joseph Ralston of Las Vegas, and two grandchildren. Services will be held Saturday at 2 p.m. at the Chester Arner Chapel Burial will be in Union Cemetery, New Manchester. Friends may call at the chapel Friday and Saturday up to the time of service.