7 of 49 Construction of Giresun Wastewater Treatment Plant  Tender Dossier Volume 3 Employer’s Requirements  Section 05: Earth Works, Pipe Works and Ground Improvement  5.2.1 General  5.2 Earth Works  General excavation required for structures including pipes and subsoil-structures, roads or other mass  excavation includes:   excavation of any type of ground, whether this excavation has to be made by hand or by ma- chine;   any additional excavation to accommodate temporary supports and all working space to carry  out the work;   scarifying of the exposed surface, compaction to maximum density and protecting of for- mation levels;   supporting excavations and temporary support of the sides of excavations;   keeping free the excavation from surface and ground water;   location, maintaining and, where required, reinstatement of other services;   disposal of excavated material whether it shall be reused for backfilling or removed as surplus  material off site including formation of all temporary spoil heaps and all double handling nec- essary;   protection of the Works and all additional measures necessary to ensure that the dug is main- tained in a safe and workmanlike manner.  The Contractor shall prepare a method statement of his proposal for earthworks operation for each par- ticular part of the Works to be constructed at any one time, detailing the location, programme of exca- vation, temporary supports and the placing and handling of the spoil.  The Contractor shall submit for the Engineer’s approval his proposed method statement at least 14  days before his intended date to commence earthworks on each particular part of the Works.  The Contractor shall give to the Engineer at least seven days written notice of his intention to com- mence earthworks on any part of site and shall furnish the Engineer with all ground levels site photo- graphs showing the existing conditions and levels and other particulars he may require for the purpose  of carrying out measurements.  If areas of excavation are not accessible for earthmoving equipment due to limited working space, traf- fic or any other reason, excavation shall be carried out manually.  Earthworks shall not be commenced until written approval has been received by the Contractor from  the Engineer.  5.2.2 Traffic requirements  The Contractor shall comply with National laws and codes of practice in respect of this section/clause.  Before any work in or affecting the use of any highway is commenced, the Contractor’s proposed  method of working shall be agreed with and confirmed in writing to the Engineer and the Highway  and Police Authorities.  Throughout the Contract, the Contractor shall co-operate with the Highway and Police Authorities  concerning works in, or access to, any highway. The Contractor shall inform the Engineer of any re- quirements of, or arrangements made with, the Highway and Police Authorities.  5_Vol3_d4.3_Section 5 Earth and pipe works_en_GIR_rev6.docx 