35 Ill. Adm. Code 501.358
Production Area
Section 501.358Â Production Area
The part of an Animal Feeding Operation that includes the
animal confinement area, the manure storage area, the raw materials storage
area, and the waste containment areas. Also included in the definition of
production area is any egg washing or egg processing facility, and any area
used in the storage, handling, treatment, or disposal of mortalities.