Families of two workers have sued Nippon Dynawave Packaging Company and the Longview paper-and-pulp mill’s previous owner who built the tank of white liquor that failed in May, killing 11 people.

Dillon Miller, 27, and CJ Doran, 26, were among the workers who died May 26 when the tank spilled nearly 1 million gallons of caustic chemicals onto Nippon’s maintenance and electrical shops, where Miller and Doran were starting their shifts.

Miller survived the initial spill and was taken to a Longview hospital then a Portland burn center, where he died later that day.…