California Code, Health and Safety Code - HSC § 25395.95

(a) After implementation of the site assessment plan, the person shall submit to the agency a report of the findings made pursuant to the plan. Based upon a review of this information, the agency shall determine whether a response action is necessary to address any unreasonable risk from hazardous materials at the site.

(b) If the agency determines that there is no unreasonable risk at the site and that there are no hazardous materials at the site at levels that are not suitable for unrestricted use of the site, the agency shall make a finding that no further action is necessary at the site.

(c) If the agency determines that there are hazardous materials at the site at levels that are not suitable for unrestricted use, but that are suitable for the reasonably anticipated foreseeable use of the site based on current and projected land use and zoning designations, the agency shall find that no further action is necessary at the site except that a land use control that imposes appropriate restrictions pursuant to Section 25395.99 shall be executed and recorded and the public comment and participation requirements of Section 25395.96 shall be met before the execution and recording of any land use control. On or before 15 days after the date when the land use control is recorded pursuant to Section 25395.99, the agency shall state in writing that this act constitutes “appropriate care” for the purposes of Section 25395.67.