For much of the 20th century, Fort Ord was one of the largest light infantry training bases in the country … [L]eft behind were poisonous stockpiles of unexploded ordnance, lead fragments, industrial solvents and explosives residue, a toxic legacy that in some areas of the base remains largely where the Army left it. … The Army has set up two treatment plants at Fort Ord to remove solvents and other contaminants from groundwater. In 2021, 12,000 acres were removed from the Superfund program, reflecting progress in the cleanup, though fully cleaning up the groundwater could take another 30 years, officials said.