Cal. Health & Safety Code § 25400.35

A local health officer shall establish a written plan consistent with this chapter outlining the procedures to be followed for conducting the remediation to property for purposes of this chapter. The procedures shall comply with this article and any regulations adopted pursuant to this chapter, and shall include, but not be limited to, procedures for the preparation of a preliminary site assessment work plan, the conduct of a preliminary site assessment to determine the extent and level of contamination, in accordance with that PSA work plan, and the preparation of a PSA report containing the results of the preliminary site assessment and recommendations for remediation to meet the occupancy standards specified in Section 25400.16.