Is anyone here...?

currently employed as a water treatment plant operator? My daughter's application for the job has been approved and she has to take a test in June. She says she isn't really clear on what exactly she'll be doing and since you need to pass the test to get the job, she wonders if there is something she should be studying?

Update:

We are in Chicago, Illinois.

Update 2:

I don't work there.

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