The Department of Defense's (DoD) Strategic Environmental Research and Development Program (SERDP) is seeking to fund environmental research and development proposals. SERDP is DoD's environmental science and technology program, planned and executed in partnership with the Department of Energy and the Environmental Protection Agency, with participation by numerous other Federal and non-Federal organizations. The Program invests across the broad spectrum of basic and applied research, as well as advanced development. Proposals responding to the Fiscal Year (FY) 2023 SONs will be selected through a competitive process. Separate solicitations are available to Federal and non-Federal proposers. The Core SERDP Solicitation provides funding in varying amounts for multi-year projects. All Core Solicitation pre-proposals are due to SERDP January 6, 2022 by 2:00 p.m. ET. SERDP also will be funding environmental research and development through the SERDP Exploratory Development (SEED) Solicitation. The SEED Solicitation is designed to provide a limited amount of funding (not to exceed $250,000) for projects up to approximately one year in duration to investigate innovative approaches that entail high technical risk or require supporting data to provide proof of concept. This year, SERDP is requesting SEED proposals for the Munitions Response program area. The SONs and detailed instructions for each are available on the SERDP website. All SEED proposals are due March 10, 2022 by 2:00 p.m. ET.

The Community Guide series (formerly Citizen's Guides) is a set of two-page fact sheets describing cleanup methods used at Superfund and other hazardous waste cleanup sites. Each guide answers six questions about the method: 1) What is it? 2) How does it work? 3) How long will it take? 4) Is it safe? 5) How might it affect me? 6) Why use it? Each guide also contains information about how many Superfund sites have used the technology and a case study description.

The research in this report was conducted to capture the capabilities, efficiencies, technological and site-specific requirements, and lessons learned for technologies and methods used for mining site cleanup. EPA's goals for the work presented in this document were to 1) determine if there are any trends in treatments or methods used; 2) understand successes and failures of the technologies and methods to evaluate whether there are gaps where future technologies could be developed or current ones refined; and 3) provide information in one place to aid decision of whether a given technology or method might be appropriate for use at a particular site, based on information obtained from the case studies.

Vapor intrusion refers to the migration of chemical vapors from a subsurface source, such as contaminated soil, groundwater, or utility conduit, into an overlying building or structure. Vapor-forming chemicals that potentially can provide subsurface sources for vapor intrusion include chlorinated volatile organic compounds (VOCs), such as chlorinated solvents, petroleum hydrocarbons, pesticides, polychlorinated biphenyls, elemental mercury, and per- and polyfluoroalkyl substances (PFAS). Although this issue area focuses on vapor intrusion, groundwater intrusion can be a source of vapors in indoor air. Groundwater intrusion occurs when the water table is elevated, such as following a heavy rain, and floods the lower level of a building.