“Appropriate care” means either of the following:

1. (a) The performance of a response action, with respect to hazardous materials found at a site, for which the agency makes the determination specified in paragraph (1) of subdivision (c) of Section 25395.96 and that meets all of the following conditions:

   1. (1) The response action is determined by an agency to be necessary to prevent an unreasonable risk to human health and safety or the environment, as defined in Section 25395.90.
   2. (2) The response action is performed in accordance with a response plan approved by the agency pursuant to Article 6 (commencing with Section 25395.90).
   3. (3) The approved response plan includes a provision for oversight and approval of the completed response action by the agency pursuant to Article 6 (commencing with Section 25395.90).
2. (b) A determination that no further action is required pursuant to Section 25395.95.