The Environmental Protection Agency was expected to put boots on the ground in Armstrong late Tuesday afternoon.
They planned to interview anyone involved in the incident.
They were to use a hand-held device called a Lumex to measure the amount of mercury vapors in the air.
Mercury looks like silver water.
Flashlights would help locate the mercury beads, which are charcoal-colored and smaller than a thumbtack.
"If we need to conduct a clean-up, we'll bring in a contractor who specializes in mercury clean-ups. The contractor would use vacuums with specialized equipment to separate the mercury from dust and other particles," said Kris Lancaster, a spokesperson for the EPA out of Kansas City.
Lancaster say in its liquid state, mercury can travel easily through floor boards and cracks in concrete.