40 CFR § 63.1345
Emissions limits for affected sources other than kilns; clinker coolers; new and reconstructed raw material dryers
June 9, 2020
The owner or operator of each new or existing raw material, clinker, or finished product storage bin; conveying system transfer point; bagging system; bulk loading or unloading system; raw and finish mills; and each existing raw material dryer, at a facility which is a major source subject to the provisions of this subpart must not cause to be discharged any gases from these affected sources which exhibit opacity in excess of 10 percent.
[78 FR 10039, Feb. 12, 2013]