Betty Jean Hall: the lawyer who broke down barriers for women in mining
Hall’s efforts resulted in legal settlements that provided back pay to women who had been denied jobs and secured future hiring commitments from mining companies.
Project will test new chemical dissolution strategies and purification techniques to produce pure gallium and germanium compounds from waste materials.
The final rule lowers the permissible exposure limit of respirable crystalline silica to 50 micrograms per cubic meter of air for a full-shift exposure.