Construction of Giresun Wastewater Treatment Plant  Tender Dossier Volume 3 Employer’s Requirements  Section 04: General Requirements for the Execution and Completion of the Works  24 of 40 The following areas of work will involve serious hazards; hence appropriate actions shall be taken  to reduce the risks as far as practicable:  • Excavations (e.g. support to prevent earth movement, contact with underground / overhead  services, stops to prevent dumpers, barriers / warning signs for pedestrians);  • Working at height (e.g. falls, falling materials);  • Confined spaces (e.g. oxygen deficiency, poisonous gas/vapor/fumes, explosive gas);  • Sewage, sludge in tanks, chambers and pipelines (e.g. leptospirosis/Weil's disease,  drowning, poisonous gas);  • Work on roads (e.g. traffic, pedestrians);  • Heavy lifting (e.g. suitable equipment, stable ground, trained driver/ slinger/ banks man);  • Vibrating equipment;  • Overlap with Employer's undertaking (e.g. existing operational plant and equipment);  • Dangerous substances' storage, handling and use (e.g. chemicals, explosives); and  • Controlled waste materials' handling.  Prior to the commencement of any hazardous operation, the Contractor shall submit a safety  method statement to the Engineer for his approval. Where deemed appropriate by the Engineer, a  hazardous condition HAZCON study shall be undertaken by the Contractor and agreed with the  Engineer prior to the method statement being prepared.  All operatives are to have been suitably trained prior to commencing work and are to be adequately  supervised whilst carrying it out.  All plant and equipment is to be suitable for the task to be undertaken and properly inspected tested  prior to being put into operation.  The Contractor shall appoint an accident prevention officer at the site, responsible for maintaining  safety and protection against accidents. This person shall be qualified for this responsibility, and  shall have the authority to issue instructions and take protective measures to prevent accidents.  The Contractor shall send to the Engineer details of any accident as soon as possible after its  occurrence. The Contractor shall maintain records and make reports concerning health, safety and  welfare of persons, and damage to property, as the Engineer may reasonably require.  The Engineer will require the Contractor to remove (or cause to be removed) any person employed  on the works who persist in any conduct that is prejudicial to safety, health or the protection of the  environment.  Any part of the site that is designated as a "restricted area" may not be entered without a "permit to  work". All places occupied by live, operational, mechanical, electrical or chemical equipment, and  "live" sewers, manholes and chambers will usually be so designated. The Contractor shall not  allow any of his operatives or sub-contractors to enter such an area until a permit has been issued.  When the Contractor requires such a permit he shall give 7 clear days' notice to the Engineer, who  will arrange with the appropriate authority to issue one. When the Contractor receives such a  permit he shall comply with any precautionary requirements that may be specified in it and shall  hold the permit until the end of the period covered and then return it to the Engineer. Compliance  with the requirements of the permit shall not absolve the Contractor from any responsibilities under  the Contract.  Contractor shall prepare an “Emergency Response Plan” and submit to the approval of the  Engineer.  4_Vol3_d4.3_Section 4 General Requirements_en_GIR_rev6 