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~ r' - 'J 1 UUeU Par 36 a d if there are no applicable Federal Specifications Feral Standards, shall conform to the applica e sp "fications of the American Society for Testin nd Mate 'als, the Society of Automotive Engineers. r the Amen an National Standards Institute. the contrac I for justifiable cause proposes to deviate trom or use materials not covered by t Federal Specificati 5 or Federal Standards, he sh 'state the reasons for d exact nature of the devis . n and shall submit tor e approval of the contr cting officer complete sp "fications for the ma rials that he proposes to use. 37_ If, after ins lation, the operation r use of the materials or quipment proves to be uns tisfactory to the contrac ng officer, the Government 5 II have the right to erate or use such materials or quipment until cor: ection of defects, errors or omi ions by repair by partial or complete replacement can be made ithout interfering with Government oper tions. Exce t for any warranty provided for elsewhere i this co ract or unless otherwise agreed upon in adva period of such operation or use, pending correcti n ENVIRONMENTAL QUALITY PROTECTION 38. LANDSCAPE PRESERVATION a. General.- The contractor shall exercise care to preserve the natural landscape and shall conduct his construction operations so as to prevent any unnecessary destruction, scarring, or defacing of the natural surroundings in the vicinity of the work. Except where clearing is required for permanent works, for approved construction roads and tor excavation operations, all trees, native shrubbery, and vegetation shall be preserved and shall be protected from damage which may be caused by the contractor's construction operations and equipment. Movement of crews and equipment within the right.ot-way and over routes provided for access to the work shall be performed in a manner to prevent damage to grazing land, crops, or property. No special reseeding or replanting will be required under these specifications; however, on completion of the work and in addition to the requirements of Paragraph 3, all work areas shall be smoothed and graded in a manner to conform to the natural appearance of the landscape. Where unnecessary destruction, scarring, damage, or defacing may occur as a result of the contractor's operations the same shall be repaired, replanted, reseeded, or otherwise corrected at the contractor's expense. b. Construction roads.-The location, alinement and grade of construction roads shall be subject to approval of the contracting officer. c. Contractor's campsite.- The contractor's camp. shop. office, and yard area shall be located and arranged in a manner to preserve trees and vegetation to the maximum practicable extent. On abandonment all camp. storage, and construction buildings, induding concrete footings and slabs, and all construction materials and debris shall be removed from the site. The camp area shall be left in a neat and natural appearing condition. d. Borrow areas and quarry sites.-Borrow pits and quarry sites shall be so excavated that water will not collect and stand therein. Before being abandoned, the sides of borrow pits and quarry sites shall be brought to stable sLopes with slope intersections rounded and shaped to provide a natural appearance. All rubbish, contractor's equipment and structures shall be removed from the site. Waste piles shall be leveled and trimmed to regular lines and shaped to provide a neat appearance. e. Blasting precautions.-In addition to the requirements of Paragraph 60, the contractor shall adopt precautions when using explosives which will prevent scattering of rocks, stumps, or other debris outside the work area. I. Costs,- The cost of all work required by this paragraph shall be included in the price bid in the schedule for other items of work. 39_ PRESERVATION OF TREES a. Preservation.-AII trees and shrubbery which are not specifically required to be cleared or removed for construction purposes shall be preserved and 20