1. a) This rule applies to:

   1. 1) The final 1500 feet of Schoenberger Creek starting immediately south of the Baltimore and Ohio main tracks and running north to an unnamed tributary of the Cahokia Canal; and
   2. 2) The unnamed tributary from its confluence with Schoenberger Creek as it runs west and northwest for a distance of 8000 feet to its confluence with the Cahokia Canal.
2. b) The standard for iron (dissolved) in 35 Ill. Adm. Code 302.208 does not apply to these waters. Instead, the waters must not exceed an iron (total) concentration of 20 mg/L.

(Source: Amended at 47 Ill. Reg. 4575, effective March 23, 2023)