; (ii) evaluate the fate and transport of PFAS and their breakdown products; (iii) if feasible, estimate exposure to individual or total PFAS to determine relative source contributions for various exposure pathways (such as air, water, soil, or food); (iv) determine environmentally relevant PFAS; and (v) identify research needed to advance exposure estimation to individual or total PFAS. (B) Report Not later than 270 days after the date on which the agreement described in paragraph (1) is finalized, the National Academies shall submit to Congress a report containing the findings and recommendations of the study described in subparagraph (A) and shall make such report available on a publicly accessible website. (3) Phase II study and report on PFAS toxicity and hazard estimation (A) In general The phase II study required to be conducted under paragraph (1) shall, at a minimum— (i) review animal and human toxicity information on the environmentally relevant PFAS identified in the Phase I report under paragraph (2) and develop an approach for conducting a hazard assessment of these PFAS; (ii) give consideration as to whether chemical category-based approaches for assessing toxicity would be appropriate for evaluating PFAS as a group