at any time during the progress of the work the Contract- ing Officer determines that any subcontractor is incompetent or undesirable, he will notify the Contractor accordingly and immediate steps will be taken for cancellation of such subcontract. Subletting by subcontractors shall be subject to the same regulations. Nothing contained in this contract shall create any contractual relationship between any subcontractor and the Government. GC-V COMPLETION OF WORK V-1 POSSESSION PRIOR TO COMPLETION - The Government shall have the right to take possession of or use any completed or partially completed part of the work. Such possession or use shall not be deemed an acceptance of any work not completed in accordance with the contract. If such prior possession or use by the Government delays the progress of the work or causes additional expense to the Contractor, an equitable adjustment in the payments to be made to the Contractor and/or the time of completion will be made and the contract shall be modified in writing accordingly. V-2 CLEANING UP - The Contractor shall at all times keep the construction area, including storage areas used by him, free from accumulations of waste material, slash or rubbish and prior to completion of work, remove any rubbish from and about the premises and all tools, scaffolding, equipment, and materials not the property of the Government. Upon completion of the construction, the Contractor shall leave the work and premises in a condition satisfactory to the Contracting Officer. V-3 FINAL EXAMINATION AND ACCEPTANCE - As soon as practicable after the completion of thé éntire work or any divisible part thereof as may be designated in the specifications, a thorough examination thereof will be made by the Contracting Officer at the site of the work. If such work is found to comply fully with the requirements of the contract, it will be accepted and final payment therefor will be made in accordance with Article VI of the contract. GC-12