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September 15, 2000

Ms. Amy Jackson, Hearing Officer

Illinois Pollution Control Board

600Springfield,S. SecondIL St., Suite 402

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Dear Ms. Jackson:

Re: ROl-lO

During the hearing this week in Joliet, interest was expressed in the amount ofdrawdown

ofthe aquifer from wells supplying peaker plants. The Illinois Water Survey has worked

with various citizens to answer questions specific to-particular plants, three ofthe letters

(sans attachments) are enclosed. They do not go so fir as to address the cumulative

effects ofall ofthese wells pumping simultaneously.

One issue that is raised in the October 1, 1998, letter to Mr. Stan Smorgorzewski is water

quality. The Illinois Water Survey states “There are reports ofradioactive isotopes

associated with these waters (the Cambrian-Ordovician-Age aquifer) which can be a

factor in its use.” To my knowledge, no one has addressed the resultant air quality issue

when that water evaporates during cooling turbines and is discharged as vapor into the

air.

These letters were authored by Mr. Andrew Buck. My understanding is that he has left

the department. We have been dealing with Mr. George Roadcap.

Thank you for your interest. Ifyou have questions, feel free to call.

Sincerely,

Susan Zmgle

14880 Yorkhouse Rd.

Wadsworth, IL 60083