40 CFR § 406.10
Applicability; description of the corn wet milling subcategory
June 9, 2020
The provisions of this subpart are applicable to discharges resulting from the process in which shelled corn is steeped in a dilute solution of sulfurous acid and then processed by wet means into such products as animal feed, regular and modified starches, corn oil, corn syrup, and dextrose.