Substance identified in Bristol County hazmat situation below highway overpass

ATTLEBORO — The Attleboro Fire Department and a regional hazardous materials team responded Thursday morning to Clifton Street after two containers holding an unknown dark liquid were found on the sidewalk. The substance was later identified as mineral oil consistent with hydraulic fluid.

At approximately 10:00 a.m., the Attleboro Fire Department responded to Clifton Street under the Interstate 295 overpass for a report of containers found on the sidewalk.

Upon arrival, firefighters discovered two approximately five-gallon containers holding an unknown dark substance. Crews also observed a foam-like material coming from the containers, indicating a possible chemical reaction.

As a precaution, a 300-foot section of Clifton Street was closed to traffic while the situation was evaluated. The Attleboro Fire Department requested a Tier 1 hazardous materials response. A Massachusetts Department of Fire Services Hazmat Team arrived on scene at approximately 10:45 a.m.

Hazardous materials technicians obtained samples from the containers and conducted testing to determine the nature of the substance. Initial testing confirmed there was no immediate threat to the public. Further analysis determined the fluid to be mineral oil consistent with hydraulic fluid.

“When these types of emergencies are reported, there is no immediate way to determine what chemical may be present or how it might react,” said Attleboro Fire District Chief Michael Maitland. “Containers holding unknown substances can pose significant health and fire hazards depending on their contents. We take these calls seriously to ensure the safety of the public and first responders.”

Once the substance was determined not to be hazardous, the Attleboro Health Department coordinated the proper disposal of the material.

No injuries were reported. Crews remained on scene until approximately 11:45 a.m.

The Attleboro Fire Department reminds residents to dispose of chemicals and hazardous materials properly. Communities across Massachusetts hold household hazardous waste collection days throughout the year to allow residents to safely dispose of these materials.