Cal. Health & Safety Code § 25395.104

(a) Except as otherwise provided in this section, a bona fide ground tenant shall qualify for the following immunities:
1. (1) The bona fide ground tenant shall not be liable under any applicable statute for a claim made by a person, other than an agency, for response costs or other relief associated with a release or threatened release of a hazardous material at the site once the bona fide ground tenant obtains a certification pursuant to subdivision (b) or (c) that the immunity provided by this section has attached.
2. (2)
  1. (A) Except as provided in subparagraph (B), an agency shall not, subsequent to the date of the agreement, take any action under any applicable statute to require a bona fide ground tenant to take a response action on account of a release or threatened release of a hazardous material at a site.
  2. (B) The agency that entered into the agreement pursuant to this article may take action under any applicable statute to enforce the conditions imposed on the bona fide ground tenant pursuant to the agreement.
(b) Except as provided in subparagraph (B) of paragraph (2) of subdivision (a), the immunity provided in this section shall attach to a bona fide ground tenant once the agency certifies in writing that all of the following have occurred:
1. (1) A site assessment has been completed sufficient for the agency to determine the remedial measures necessary to allow the site to be used for its intended purposes without unreasonable risk to the human health and safety of the intended site occupants.
2. (2) Except for site monitoring, reporting, institutional controls, operation and maintenance activities, and other ongoing obligations of the bona fide ground tenant, if any, the portion of the site investigation and the response plan necessary to allow the site to be used for its intended purposes without unreasonable risk to the human health and safety of the intended site occupants, including any confirmation sampling required by the agency to confirm that this standard has been met, has been implemented to the agency’s satisfaction.
3. (3) To the extent required in the agreement entered into pursuant to this article, all wells, piping, extraction systems, or similar materials or equipment required for the conduct of remediation efforts to be performed by a person other than the bona fide ground tenant have either been installed to the agency’s satisfaction or have been accounted for to the agency’s satisfaction in site development plans and specifications.
4. (4) If applicable, an instrument that restricts or imposes obligations on the present of future uses or activities on the site has been executed and recorded pursuant to Section 1471 of the Civil Code.
(c) A party to an agreement pursuant to this article may request the agency to issue a written certification confirming that the conditions stated in subdivision (b) have been met and that the immunity provided for in this section is in effect. The agency shall provide this certification within 60 days of the date it finds that the conditions stated in subdivision (b) have been met.
(d) The agency that issued a certification pursuant to subdivision (c) may withdraw that certification if it first provides reasonable notice and opportunity for the bona fide ground tenant to take action to prevent the withdrawal, and subsequent to the notice and cure opportunity makes any of the following findings:
1. (1) A material deviation from those requirements applicable to the bona fide ground tenant under the agreement entered into pursuant to this article that has not been approved by the agency exists and continues to exist subsequent to the notice and cure period.
2. (2) The bona fide ground tenant induced the agency to issue the certification by fraud, or intentional nondisclosure or misrepresentation.
(e) Upon the agency’s certification pursuant to subdivision (c), the immunity provided in this section extends to all of the following:
1. (1) The bona fide ground tenant and any successor who demonstrates to the agency that the person meets the qualifying conditions of subdivision (b) of Section 25395.102 and subdivisions (c), (d), (e), and (f) of Section 25395.80 and who assumes the bona fide ground tenant’s obligations of any agreement entered into pursuant to this article.
2. (2) A person who provides financing to a person specified in paragraph (1).
(f) The immunity provided in this section does not extend to, and may not be transferred to, a person who was a responsible party, as that term is defined in Section 78145 for the release at the site prior to acquiring an interest in the site from the bona fide ground tenant or providing financing as specified in paragraph (3) of subdivision (e).
(g) The immunity provided in this section shall be in addition to any other immunity provided by law.
(h) This section shall not modify or limit the existing authority of a state or local agency to impose a condition on the issuance of a discretionary permit relating to the development, use, or occupancy of a site.
(i) This section shall not relieve a bona fide ground tenant from reporting, disclosure, and notification requirements under any applicable statute.
(j) The entry into an agreement pursuant to this article shall not constitute an admission of any fact or liability or conclusion of law for any purpose or proceeding and a person who enters into an agreement under this article shall not be deemed liable under any other provision of law solely by reason of entering into the agreement.
(k) If the use of the property changes, after a response plan is approved, to a use that requires a higher level of protection, the agency may require the preparation and implementation of a new response plan pursuant to this article.
(l) A bona fide ground tenant that purchases a site subsequent to leasing, or taking an easement in the site, may convert its status to that of a bona fide purchaser pursuant to Article 6 (commencing with Section 25395.90) if the bona fide ground tenant otherwise meets the requirements of Section 25395.69 and Article 6 (commencing with Section 25395.90). Upon the conversion, the bona fide ground tenant shall qualify for any and all immunities available to a bona fide purchaser under this chapter.
(m) If the response plan relies on the use of institutional or engineering controls to make the site suitable for its intended purposes without unreasonable risk to the human health and safety of the intended occupants of the site, the bona fide ground tenant seeking immunity shall provide any applicable financial assurances, using financial assurance guidelines and mechanisms approved by a board, department, or organization of the California Environmental Protection Agency; periodic reports as required by the agency to demonstrate that there remains no unreasonable risk to the human health and safety of the intended occupants. The bona fide ground tenant shall not make any change in use of the site that is inconsistent with any land use control recorded for the site unless the change is approved by the agency pursuant to Sections 25233 and 25234 or, in the case of the board or a regional board, substantially similar procedures.