A California environmental justice (EJ) group is threatening to sue EPA and the Navy over the troubled cleanup of radiological and other contamination at the former Hunters Point Naval Shipyard (HPNS) site in San Francisco, alleging the agencies violated the Superfund law pertaining to testing, remediation standards and project review requirements. Attorneys for Greenaction for Health and Environmental Justice filed a Dec. 7 notice of intent (NOI) to sue , warning that the group plans to sue the agencies to…