California Code, Health and Safety Code - HSC § 25395.80

(a) On or before the date on which the person acquired the site, the person made all appropriate inquiries into the previous ownership and uses of the site.

(b) The person exercises appropriate care with respect to the release or threatened release of hazardous materials at the site.

(c) The person provides full cooperation, assistance, and access to a person who is authorized to conduct response actions or natural resource restoration at the site, including the cooperation and any access necessary for the installation, integrity, operation, and maintenance of complete or partial response actions or natural resource restoration at the site.

(d) The person complies with land use controls established or relied on, in connection with an approved response action at the site, and does not impede the effectiveness or integrity of any aspect of any remedy employed at the site in connection with a response action.

(e) The person complies with all requests for information or an administrative subpoena concerning the release or threatened release of hazardous substances by any agency with jurisdiction under an applicable statute.

(f) The person provides all notices and satisfies reporting requirements required by state or federal law with respect to the discovery or release of hazardous substances at the site.