March 11, 2004 Group Is Suing Federal Agency Over Post-9/11 Health HazardsBy ANTHONY DePALMA he health of tens of thousands of people who live and work in Lower Manhattan and Brooklyn has been endangered by the way federal officials mishandled the environmental hazards caused by the collapse of the World Trade Center, according to a lawsuit filed yesterday in United States District Court in Manhattan. Twelve Manhattan residents and workers sued the Environmental Protection Agency for failing to follow its own procedures to ensure the area was safe before allowing people to return.They also accused the agency's former administrator, Christie...