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2h ago

Hydrochloric Acid Leak From FedEx Truck Closes I-25 Ramp in Thornton

Officials say a slipped securing strap damaged a 300-gallon tote, releasing roughly 50 to 75 gallons inside the trailer.

The southbound Interstate 25 on-ramp was closed at 84th Avenue in Thornton for a hazmat incident on Monday, Sept. 22, 2025. (Photo provided by the Thornton Police Department)
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Overview

  • Responders report the leak has been repaired and the remaining acid is being pumped into a new tote for continued transport as cleanup operations continue.
  • Thornton police closed the southbound I-25 on-ramp at 84th Avenue and shut 84th Avenue between Grant Street and Conifer Road for an extended hazmat investigation.
  • The FedEx driver noticed the problem around 2 a.m. while traveling from a Denver warehouse toward Wyoming, according to the fire department.
  • Fire officials said the spill was contained to the trailer with no product running onto the roadway.
  • Hazmat teams made entry in protective suits to assess the damage, neutralize the acid to a non-reactive pH, and coordinate with North Metro Fire Rescue and Adams County crews.