Update: The stuff included asbestos.

The Boston Fire Department reports firefighters responded to 99 Summer St., near Kingston Street, around 5:30 a.m. after "e steam leak earlier sprayed unknown debris in the area." Read more.

A concerned citizen files a 311 report about the intersection of East Berkeley Street and Harrison Avenue in the South End:

Veolia needs to fix their sinking multiple potholes of death.

The Massachusetts Appeals Court ruled today that Veolia, which generates steam at a Chinatown plant, owes the city of Boston $2.2 million in taxes for the 2015 fiscal year because it applied for a tax abatement via letters attached to its quarterly tax payments rather than through an official abatement form. Read more.

Cambridge Police say there won't be anything to be alarmed about on Saturday when you see large clouds of steam erupting out of the Veolia power plant in Kendall Square on Saturday.

Veolia Energy will be conducting a procedure known as steam blowing Saturday, May 30, between 8:00am-6:00pm. ... This operation involves flowing steam through a pipe for the purpose of pipe cleaning. The cleaning will result in large clouds of steam, which may cause curiosity and/or phone calls from the general public.

Firefighters began evacuating 76 South Street around 9:40 a.m. when a steam pipe under the street failed as only a steam pipe can, turning the building into an instant shvitz with steam pouring into it.

A hazmat team was also called in, because old pipes could be lined with asbestos.