; and (3) analyzes the potential impacts of mitigation options, emissions reductions, and the increased use of aviation biofuels with, or in place of, commonly used petroleum-based aviation fuels on— (A) ultrafine particles in the air surrounding airports; and (B) human health. (b) Coordination The Administrator shall carry out the study in coordination with the Environmental Protection Agency and the Department of Health and Human Services and may carry out the study in coordination with any other Federal department or agency that the Administrator determines is appropriate. (c) Report Not later than 2 years after the date of enactment of this section, the Administrator shall submit to Congress a report on the results of the study that includes related findings, analysis, and a detailed description of the methods and data utilized. (d) Ultrafine particle defined In this section, the term ultrafine particle means a particle under 100 nanometers in diameter.