; and (ii) for the completion of such activities at such site; (C) if either cost estimate specified in subparagraph (B) is unavailable with respect to a given site specified in subparagraph (A), a detailed description of known and unknown factors, including site characteristics and the nature of contamination, that may affect the cost to complete testing and remediation activities at such site based on historical costs of remediation for— (i) sites remediated under the Defense Environmental Restoration Program under section 2701 of title 10, United States Code; (ii) other federally-funded sites; or (iii) privately-funded sites; and (D) for each site specified in subparagraph (A) for which the Secretary has completed the preliminary assessment or site inspection phase and that has been designated as requiring a remedial investigation or study on the feasibility of remediating the site, the timeline for the completion of such investigation or study. (2) Definitions In this subsection: (A) The term military installation has the meaning given such term in section 2801(c) of title 10, United States Code. (B) The term National Guard facility has the meaning given that term in section 2700 of title 10, United States Code. (b) Publication of information Beginning not later than one year after the date of the enactment of this Act, the Secretary of Defense shall publish on the publicly available website established under section 331(b) of the National Defense Authorization Act for Fiscal Year 2020 ( Public Law 116–92