12 Hospitalized In Level 3 Hazmat Situation In South End

BOSTON — Eleven firefighters and one resident hospitalized after a Level 3 hazmat situation in the South End forced people from a Washington Street rooming home. Firefighters said someone called about a potential chemical or gas spill at the five-story building in the South End around 12:15 p.m.

It was reported that noxious fumes were on the third floor. An inspection has cleared the building of hazardous gas. Authorities say it appears to have been a combination of two cleaning supplies that do not mix: ammonia and bleach. Officials are reminding residents not to mix things like Pine Sol and bleach when cleaning.

Fire officials define a Level 3 hazmat incident as: fitting one of the following:

• Materials or conditions which require the use of the chemical protective clothing,
• The evacuation of areas and buildings adjacent to the chemical emergency
• Extreme conditions necessitating additional equipment and specially trained personnel.

Read about other recent hazmat situations:

• Hydrogen Peroxide Spill Prompts Evacuation
• Congress Street Building Evacuated In Boston's Financial District
• Hazmat Situation At Harvard Lab

Patch reporter Jenna Fisher can be reached at Jenna.Fisher@patch.com or by calling 617-942-0474. Follow her on Twitter and Instagram (@ReporterJenna).