To authorize the Administrator of the Environmental Protection Agency to accept, as part of a settlement, diesel emission reduction Supplemental Environmental Projects, and for other purposes.

[AI summary unavailable — showing source text] Authorizes the Administrator of the Environmental Protection Agency (EPA) to accept, as part of a settlement of any alleged violations of environmental law, diesel emissions reduction Supplemental Environmental Projects if the projects: (1) protect human health or the environment; (2) are related to the underlying alleged violations; (3) do not constitute activities that the defendant would otherwise be legally required to perform; and (4) do not provide funds for EPA's staff or for contractors to carry out EPA's internal operations.…