40 CFR § 417.180
Applicability; description of the manufacture of drum dried detergents subcategory
June 9, 2020
The provisions of this subpart are applicable to discharges resulting from the operations associated with the manufacture of detergents by drum drying, including, but not limited to, drying of formulations on heated drums or rollers, conversion of dried detergents to powders or flakes, and packaging of finished products.