Cal. Civ. Code § 1993.06

The personal property described in the notice shall either be left on the vacated premises or be stored by the landlord in a place of safekeeping until the landlord either releases the property pursuant to Section 1987 or disposes of the property pursuant to Section 1993.07. The landlord shall exercise reasonable care in storing the property, but he or she is not liable to the tenant or any other owner for any loss not caused by his or her deliberate or negligent act.