# Federal Register
1 - 78:56273-56504 - Occupational Exposure to Respirable Crystalline Silica; Proposed Rule - PDF
# Regulations
1 - 1910.141(d)(2) - Sanitation.
# Standard Interpretations
1 - 1910.141(d)(2) - Whether a pH buffer solution can be used as a cleansing agent for employees who work with portland cement.