March 5, 2009AMEREN ENERGY GENERATING CO.,Petitioner,v.
ILLINOIS ENVIRONMENTAL
PROTECTION AGENCY,Respondent.
Pet.
Exh.
11.
2 The current, 2-condition thermal discharge temperature limits applicable to the Station
provide that discharges shall not result in a temperature, as measured at the outside edge of themixing zone of Coffeen Lake, which1) Exceeds 105 degrees F as a monthly average from June through September, and a 112degrees F as a maximum for more than 3 % of hours during that same period, and2) Exceeds 89 degrees F as a monthly average from October through May, and a 94degrees F as a maximum for more than 2 % of hours during...
Allowed
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