40 C.F.R. § 425.40
Applicability; description of the retan-wet finish-sides subcategory.
Cite as 40 C.F.R. § 425.40 (2026)
The provisions of this subpart are applicable to process wastewater discharges resulting from any tannery which processes previously tanned hides and skins (grain side only) into finished leather by retan-wet finishing.