It shall be the responsibility of the Department of Labor and Employment to conduct continuing studies and research to develop innovative methods, techniques and approaches for dealing with occupational safety and health problems; to discover latent diseases by establishing causal connections between diseases and work in environmental conditions; and to develop medical criteria which will assure insofar as practicable that no employee will suffer impairment or diminution in health, functional capacity, or life expectancy as a result of his work and working conditions.