T he Con tractor hall not at any time leave any Mining Services, or partly completed Mining Services, in an unsafe condition, or in a condition which might cause personal injury or damage to existing Mining Services, plant, machinery or equipment, but shall continue that Mining Services or partly completed Mining Services until it is a safe stage. During the execution of the Mining Services, the Contractor shall keep the Site free from all unnecessary obstruction and shall store or dispose of any surplus Contractor's Equipment and materials and clear away and remove from the Site any wreckage and rubbish no longer required. The Contractor shall comply with all directions of the Employer in that regard. Such compliance shall not relieve the Contractor from full responsibility there for. The cost, including the cost of wages and overtime, shall be borne by the Contractor