; and (B) waste storage and disposal solutions; (3) to coordinate with the headquarters of the Environmental Protection Agency, Regional Offices, Federal land management agencies, States, and voluntary nongovernmental organizations, watershed groups, nonliable entities and mining companies, and other entities voluntary response actions at covered mine sites, where applicable, including timely issuance of administrative guidance for nonliable parties; (4) to coordinate with the headquarters of the Environmental Protection Agency and other Federal Government entities, pursuant to existing authorities under section 3303 of title 41, United States Code, hiring practices to support small business concerns to carry out response actions at covered mine sites; (5) to coordinate with the Secretary of the Interior, the Secretary of Energy, the Secretary of Health and Human Services, the Nuclear Regulatory Commission, and other Federal agencies, as the Administrator determines to be appropriate, to ensure interagency coordination of covered mine site response actions, with priority given to coordinating response actions at covered mine sites for which there is no potentially responsible party; and (6) to coordinate other actions as the Administrator determines to be appropriate, pursuant to existing authorities of the Administrator— (A) to support efforts to investigate, characterize, or clean up a discharge, release, or threat of release of a hazardous substance, pollutant, or contaminant into the environment at or from a covered mine site