New Haven door-lock maker Sargent Manufacturing Co. faces a $64,495 penalty from the U.S. Environmental Protection Agency for violating state and federal hazardous waste laws.
According to a complaint filed by EPA's New England regional office in Boston, Sargent failed to segregate containers of spent hydrochloric acid and sodium fluoride, among other violations of waste management laws.
Mixing these incompatible wastes could lead to a fire or explosion, or the generation of flammable hydrogen gas, authorities said.
The EPA lists the site as one of 3,747 facilities nationwide requiring corrective action under the Resource Conservation and Recovery Act.
Sargent is owned by Swedish lock maker Assa Abloy.
There was no immediate company response to HartfordBusiness.com's call Thursday for comment.