; (C) the evidence required under subsection (c)(3); (D) each plan required under paragraphs (9) and (10) of subsection (c); and (E) a detailed plan of the investigative sampling. (4) Requirements (A) In general If a person submits an application that proposes only investigative sampling of historic mine residue, soil, sediment, or water that only includes the requirements described in paragraph (1), the Administrator may grant an investigative sampling permit that authorizes the person only to carry out the plan of investigative sampling of historic mine residue, soil, sediment, or water, as described in the investigative sampling permit application under paragraph (3). (B) Reprocessing An investigative sampling permit— (i) shall not authorize a Good Samaritan or cooperating person to conduct any reprocessing of material; and (ii) may authorize metallurgical testing of historic mine residue to determine whether reprocessing under subsection (f)(4)(B) is feasible. (C) Requirements relating to samples In conducting investigative sampling of historic mine residue, soil, sediment, or water, a Good Samaritan shall— (i) collect samples that are representative of the conditions present at the abandoned hardrock mine site that is the subject of the investigative sampling permit; and (ii) retain publicly available records of all sampling events for a period of not less than 3 years. (5) Permit conversion Not later than 1 year after the date on which the investigative sampling under the investigative sampling permit concludes, a Good Samaritan to whom an investigative sampling permit is granted under paragraph (1) may apply to convert an investigative sampling permit into a Good Samaritan permit under subsection (e)(1). (6) Permit not converted (A) In general Subject to subparagraph (B)(ii)(I), a Good Samaritan who obtains an investigative sampling permit may decline— (i) to apply to convert the investigative sampling permit into a Good Samaritan permit under paragraph (5)