Assessing mercury levels in the wastewater of an aging research laboratory building

Wastewater outflow, sink trap water, and pipe sediment samples were collected from the building. The Jerome 431 Mercury Vapor Analyzer was assessed as a tool for screening lab sink trap drains for mercury deposition. Results revealed that the three-day average for mercury discharge from this single structure, if not diluted by other waters, would be above the local total release parameters to the wastewater treatment plant. The sink traps did not contain a majority of the mercury; however, the pipe sediment and outflow samples revealed consistently elevated concentrations.