Can you refer me to some case studies, or recommend a technology provider that has deployed radio frequency identification (passive or active) in a location containing high amounts of ammonia, for the purpose of people-tracking?
I am unaware of any specific examples of RFID being deployed within an ammonia-heavy environment. There have been case studies involving the use of RFID to track hazardous materials, however, which might be of use to you. Here are three we've published:
NASA Tries RFID for HAZMAT
At the Dryden Flight Research Center, NASA is exploring ways to reduce costs and risk by using RFID to automatically identify and track hazardous materials.
U.S. Department of Energy Employs RFID to Safeguard the Country
The Argonne National Laboratory developed an active RFID system that tracks nuclear materials to protect human health, the environment and national security.
Radioactive Waste Cleanup Project Becomes More Efficient, Greener
Bechtel Jacobs is now attaching EPC Gen 2 RFID tags to all trucks hauling hazardous waste for disposal at the East Tennessee Technology Park.
—Mark Roberti, Founder and Editor, RFID Journal