Update 12:40 p.m. Pool cleaning chemicals caused the evacuation of the Bethesda Marriott (5151 Pooks Hill Rd.) this morning and sent one person to the hospital for evaluation, according to Montgomery County Fire and Rescue Services.
MCFRS personnel responded to a call for a chemical odor at the hotel just after 11 a.m., according to spokesperson Beth Anne Nesselt.
They determined the odor came from a pool cleaning crew that was using chemicals to treat the enclosed pool area in the hotel. There was no spill and hazmat units that were called to the scene were put back into service before reaching the incident.
Nesselt said two people at the hotel who said they were having trouble breathing were treated on-scene. One patient was transported to a local hospital for an evaluation and check-up.
Fire officials ventilated the area and the hotel has returned to business as usual.
