Show OSHA to study oil shale cancer possibilities The National Institute of or Occupational Safely and Health will carry out studies of workers in Colorado to determine determine deter deter- mine whether working on oil shale projects increases the possibility 01 ot cancer The workers involved in the testing have worked in shale mining and research in the state slate since World War II even though oil shale never had been mined commercially Joe Costello project director for the institute said previous studies have shown shale oil contains causing cancer-causing substances substances sub sub- stances called ben ben- lie He said the study will look for incidences of skin cancer cancer of the bladder and cancer in the respiratory system among among the themen men Costello said the Utah Biomedical Testing Laboratory of Salt Lake City will open an office on the Western Slope and will begin contacting persons in inthe inthe inthe the study group in three months The examinations will willbe he be completed within 13 months The institute also is studying the death certificates of about shale workers Existing studies will be used as background material for the impact statement |