After talking with some other network engineers and reviewing other documents I decided this is how to respond to these concerns.
Use the work already done by the regulatory bodies like the FCC and other agencies!
In our network we use Cisco AP's. Cisco AP's have an installation guide or often a quick guide to help get you started. Towards the bottom of these documents there is always a lot of legal and regulatory items I usually pay little attention. In these guides there is a section on "Declaration of Conformity for RF Exposure".
This section gives you the guidelines form installation to make sure this device conforms to RF exposure requirement:
I also provide a chart that compares exposure to your Cell Phone vs. Wi-Fi to show that the Cell Phone has a much higher output then the Wi-Fi devices.
Using this information I confirm the devices meet and are installed to comply with these guidelines and if there are any other concerns please have them contact their supervisor and workplace safety.