Here is what I found in the PA Code. Thanks for the help. It looks like you can dispose of the possessions after 10 days if you do not hear back.
Section 1. The act of April 6, 1951 (P.L.69, No.20), known as The Landlord and Tenant Act of 1951, is amended by adding a section to read:
Section 505.1. Disposition of Abandoned Personal Property.--(a) At the time a tenant has relinquished possession of the real property, the tenant shall remove from the premises all items of the tenant's personal property. For the purposes of this section, a tenant shall be deemed to have relinquished possession of the premises upon any of the following:
(1) Execution of an order of possession in favor of the landlord.
(2) If the tenant has physically vacated the premises, removal of substantially all personal property and the providing of a forwarding address or written notice stating that the tenant has vacated the premises.
(b) Upon relinquishment of the premises under subsection (a) and the acceptance of possession of the real property by the landlord, the tenant shall have ten days to contact the landlord regarding the tenant's intent to remove any personal property remaining on the premises. If the intent is conveyed to the landlord, the personal property shall be retained by the landlord at a site of the landlord's choosing for thirty days. If no communication is made to the landlord within ten days, the property may be disposed of at the end of the ten days at the discretion of the landlord.
(c) If personal property remains on the premises following the relinquishment of the premises by the tenant, the following shall apply:
(1) If there is acceptance of the real property by the landlord under subsection (a)(1) and the writ or order of possession contained notice of the provisions under subsection (b), the landlord shall not be required to provide further notice to the tenant.
(2) If there is acceptance of the real property by the landlord under subsection (a)(2) and the lease or lease addendum contains notice of the provisions under subsection (b), the landlord shall be required to provide written notice to the tenant that personal property remains on the premises and must be retrieved by the tenant. The notice under this paragraph shall give the tenant ten days from the date of postmark of the notice to notify the landlord that the tenant will be retrieving the personal property. If the intent is conveyed to the landlord, the personal property shall be retained by the landlord at a site of the landlord's choosing for thirty days from the date of postmark of the notice. If no communication is made to the landlord within ten days, the property may be disposed of at the end of the ten days at the discretion of the landlord.