This Agreement shall continue in force for an initial term of five (5) years, subject to extension by written agreement of the parties;  provided ,  however , that any party may cause this Agreement to terminate by delivering written notice thereof to the other party, in which event this Agreement shall terminate effective 30 days from the date such notice is delivered.  Upon termination, the Management Fee shall cease to accrue, with partial months pro-rated based on the number of days therein.  In addition, if the Sale has not closed prior to the effective date of such termination, then, in addition to payment of the Management Fee, the Company will pay to the Manager, within fifteen (15) days following the effective date of the termination, the value of all labor, materials, and cash advances made by the Manager for purposes of environmental remediation under Section 2.10 of the Purchase Agreement.