40 CFR § 426.40
Applicability; description of the plate glass manufacturing subcategory
June 9, 2020
The provisions of this subpart are applicable to discharges of pollutants resulting from the process in which several mineral ingredients (sand, soda ash, limestone, dolomite, cullet and other ingredients) are melted in a furnace, pressed between rollers, and finally ground and polished to form plate glass.