Rynek pracy · 11/23/1999

Proposed Program Policy Letter on Samples Used To Determine the Respirable Dust Level When Quartz Is Present

The Mine Safety and Health Administration (MSHA) requests comments on a draft Program Policy Letter (PPL) regarding the samples that are used to determine the reduced respirable coal mine dust standard when more than 5.0 percent of quartz is present in the mine atmosphere. Under the PPL, the samples used to determine a reduced standard would be MSHA samples exclusively rather than a combination of MSHA and mine operator samples. MSHA is publishing this Notice to afford an opportunity for interested persons to comment on the draft PPL before it is issued.