Wage certification for subcontracted Chicago School work?

Question

A company hired our company (valve manfacturer) to repair our specialty valve on a Chicago Public School (CPS) swimming pool. The company that hired us said CPS requires wage certification for the work, and provided an incomplete example, but no details. I cannot find anything mentioning this in info about contractors/subcontractors on CPS website. So I don't know exactly what they need or why. Does anyone know wage certification requirements for CPS contract work, or a link to details?

Answer 1

Here is a website about work and certifications in the State of Illinois

  http://lmi.ides.state.il.us/PDFs/wcig_08...

I think this is the phone number you would call with prevailing wage information 1-866-ONE-SRCE

I am not sure from your question if you talking about prevailing wage but the website above has information and phone numbers that you can call to get help  with the certification.