Columbia Borough Fire Department took to Facebook to let residents know they are likely smelling methyl mercaptan, which is not hazardous and is coming from a pipe at the recycling center.

Crews checked out the area and confirmed that there was no hazard to the public, but an officer with Hazmat 2 Environmental Fire Rescue did identify a chemical present called methyl mercaptan.

KLIA police chief ACP Azman Shari'at (pic) said the leaking gas has been identified as methyl mercaptan or methanethiol, a colourless flammable gas with a distinct odour resembling rotten eggs or ...