HSC §79260: Any response action taken or approved pursuant to this part shall be based upon, and no less stringent than, all of the following requirements: (a) The requirements established under federal regulatio

Any response action taken or approved pursuant to this part shall be based upon, and no less stringent than, all of the following requirements: (a) The requirements established under federal regulation pursuant to Subpart E of the National Oil and Hazardous Substances Pollution Contingency Plan (40 C.F.R. 300.400 et seq.), as amended. (b) The regulations established pursuant to Division 7 (commencing with Section 13000) of the Water Code, all applicable water quality control plans adopted pursuant to Section 13170 of the Water Code and Article 3 (commencing with Section 13240) of Chapter 4 of Division 7 of the Water Code, and all applicable state policies for water quality control adopted pursuant to Article 3 (commencing with Section 13140) of Chapter 3 of Division 7 of the Water Code, to the extent that the department or the regional board determines that those regulations, plans, and policies do not require a less stringent level of remediation than the federal regulations specified in subdivision (a) and to the degree that those regulations, plans, and policies do not authorize decisionmaking procedures that may result in less stringent response action requirements than those required by the federal regulations specified in subdivision (a). (c) Any applicable provisions of this part, to the extent those provisions are consistent with the federal regulations specified in subdivision (a) and do not require a less stringent level of remediation than, or decisionmaking procedures that are at variance with, the federal regulations set forth in subdivision (a).