43 C.F.R. § 11.42

(a) Evidence of efforts to coordinate with response agencies (this need not include any evidence of the substance of discussions, nor documentation of every contact);

(b) Evidence of efforts to consult with other co-trustees (this need not include any evidence of the substance of discussions, nor documentation of every contact) and documentation of any agreements among co-trustees;

(c) The invitation to potentially responsible parties inviting them to participate in the Type A procedure and documentation of any agreements reached with potentially responsible parties;

(d) Information considered when developing data inputs and assumptions for modeling, including any significant uncertainties concerning the assumptions made and complete citations to any literature used;

(e) A printout of the model(s) sufficient for reproducibility (or a copy of the file used to generate the model(s));

(f) Documentation of any assessment costs incurred, if trustees plan to seek reimbursement of such costs; and

(g) Copy of the final Type A Report and each published version of the Type A Report.