Cal. Bus. & Prof. Code § 8761.2
Notwithstanding the provisions of Section 8761, a registered civil engineer or licensed land surveyor who signs land surveying maps, plats, reports, descriptions, or other surveying documents shall not be responsible for damage caused by subsequent changes to or uses of those maps, plats, reports, descriptions, or other surveying documents, where the subsequent changes or uses, including changes or uses made by state or local governmental agencies, are not authorized or approved by the registered civil engineer or licensed land surveyor who originally signed the maps, plats, reports, descriptions, or other surveying documents, provided that the engineering or surveying service rendered by the civil engineer or land surveyor who signed the maps, plats, reports, descriptions, or other surveying documents was not also a proximate cause of the damage.
Ca. Bus. and Prof'l. Code § 8761.2