California Code, Health and Safety Code - HSC § 79370

(a) For purposes of Chapter 6.5 (commencing with Section 25100) of Division 20, Chapter 6.9.1 (commencing with Section 25400.10) of Division 20, or this part, a person who is found to have operated a site for the purpose of manufacturing an illegal controlled substance or a precursor of an illegal controlled substance is the generator of a hazardous substance at, or released from, the site that is subject to removal action pursuant to this article.

(b) During the removal action, for purposes of complying with the manifest requirements in Section 25160, the department, the county health department, the local environmental health officer, or their designee may sign the hazardous waste manifest as the generator of the hazardous waste. In carrying out that action, the department, the county health department, the local environmental health officer, or their designee shall be considered to have acted in furtherance of their statutory responsibilities to protect the public health and safety and the environment from the release, or threatened release, of hazardous substances, and the department, the county health department, the local environmental health officer, or their designee is not a responsible party for the release, or threatened release, of the hazardous substances.

(c) The officer, investigator, or agency employee specified in Section 79355 is not a responsible party for the release, or threatened release, of hazardous substances at, or released from, the site.