While CA law does impose the duties quoted below, it also says that "2080.7. The provisions of this article have no application to things which have been intentionally abandoned by their owner.
In this case, easy dismissal since it was intentionally abandoned.
:
CALIFORNIA CODES
CIVIL CODE
SECTION 2080-2080.10
2080. Any person who finds a thing lost is not bound to take charge
of it, unless the person is otherwise required to do so by contract
or law, but when the person does take charge of it he or she is
thenceforward a depositary for the owner, with the rights and
obligations of a depositary for hire. Any person or any public or
private entity that finds and takes possession of any money, goods,
things in action, or other personal property, or saves any domestic
animal from harm, neglect, drowning, or starvation, shall, within a
reasonable time, inform the owner, if known, and make restitution
without compensation, except a reasonable charge for saving and
taking care of the property. Any person who takes possession of a
live domestic animal shall provide for humane treatment of the
animal.
2080.1. (a) If the owner is unknown or has not claimed the
property, the person saving or finding the property shall, if the
property is of the value of one hundred dollars ($100) or more,
within a reasonable time turn the property over to the police
department of the city or city and county, if found therein, or to
the sheriff's department of the county if found outside of city
limits, and shall make an affidavit, stating when and where he or she
found or saved the property, particularly describing it. If the
property was saved, the affidavit shall state:
(1) From what and how it was saved.
(2) Whether the owner of the property is known to the affiant.
(3) That the affiant has not secreted, withheld, or disposed of
any part of the property.
(b) The police department or the sheriff's department shall notify
the owner, if his or her identity is reasonably ascertainable, that
it possesses the property and where it may be claimed. The police
department or sheriff's department may require payment by the owner
of a reasonable charge to defray costs of storage and care of the
property.