The Monroe Fire Department and other units responded to the scene of a spill shortly after 1 p.m. today.
A box truck stopped on northbound I-75 near mile marker 30 and the Greentree Road overpass leaked the substance, according to Monroe police.
The ramp from Ohio 63 to I-75 northbound was closed because of the incident. The right two lanes of I-75 north in the area were also closed.
Testing at the scene showed the substance was not sulfuric acid, but it is a “caustic substance,” according to emergency radio traffic.
Northbound I-75 is reduced to one lane just north of SR-63. The right lanes are closed. Motorists should use caution and expect delays. #OHGO pic.twitter.com/QKD93ZNeMB
— ODOT Cincinnati (@ODOT_Cincinnati) January 16, 2020
The Butler County Emergency Management Agency and the Ohio EPA responded.