November 15, 2007IN THE MATTER OF:PROPOSED AMENDMENTS TODISSOLVED OXYGEN STANDARD 35 ILL.
3, 2007).
The Board received four public comments during the 45day
first-notice public comment period, which ended on September 17, 2007.
• Designate stream segments to receive “enhanced” numeric dissolved oxygen standards to
protect DO-sensitive fish and macroinvertebrate species present in meaningful amounts.
The DO general use water
quality standard is critical to many other regulatory programs, including “impairment”assessments and Total Maximum Daily Load or “TMDL” under Section 303(d) of the federalClean Water Act (33 U.S.C.
§ 1313(d)). By i...
Allowed
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