Additionally, the 3-inch ball valve, when not properly configured, is leading to tank cars leaking small quantities of hazardous materials.” The Directive “requires all tank car owners to remove, ...

The agency's March 13 order gives owners 60 days to replace any 3-inch McKenzie UNNR ball valve in a tank car used to transport any hazardous material described in 49 CFR 172.101 and 90 days to ...