Sewerage Excavation, Damage to underground Identify existing underground other • Temporary DBO (laying of cutting, back utilities like water, gas utility structures, lines through Operator sewers) and filling, line, electricity and available records and in consultation Sewage compaction telephone conduits etc. with concerned authorities and plan Pumping and due to construction construction activities accordingly to station construction activities. minimize damage to such utilities. operations These underground utilities encountered in excavating trenches carefully shall be supported, maintained and protected from damage or interruption of service until backfill is complete and settlement has taken place. Accidents/ damages due Maintaining the excavation by Temporary DBO to erosion/ sliding of Shoring trench sides by placing Operator vertical of excavated sheeting, timber shores, trench trenches while places the jacks, bracing, piles, or other pipes materials Exposed surface shall be resurfaced and stabilized by making the sloping sides of trench to the angle of repose at which the soil will remain safely at rest. Generation of substantial Top soil shall be preserved and may Temporary DBO debris, top soil and muck be used for agricultural purpose or Operator during construction development of city parks. Soil and debris may be managed for planned land filling and landscaping; Debris may be suitably stored to filling back the excavated areas after placing the trunk sewer lines. Dust Generation (Air sprinkling over excavated Temporary DBO Pollution) due to areas, unpaved movement areas Operator excavation, cutting, back and stockpiles. filling and compaction Transportation of loose construction operations material through covered trucks. Use dust curtains (polysheets/ sheets) around the construction area
Sewerage (laying of sewers) and Sewage Pumping station Excavation, cutting, back filling, compaction and construction operations Damage to underground utilities like water, gas line, electricity and telephone conduits etc. due to construction activities. Temporary • Identify existing underground other utility structures, lines through available records and in consultation with concerned authorities and plan construction activities accordingly to minimize damage to such utilities. These underground utilities encountered in excavating trenches carefully shall be supported, maintained and protected from damage or interruption of service until backfill is complete and settlement has taken place. DBO Operator Accidents/ damages due to erosion/ sliding of vertical of excavated trenches while places the pipes Temporary Maintaining the excavation by Shoring trench sides by placing sheeting, timber shores, trench jacks, bracing, piles, or other materials Exposed surface shall be resurfaced and stabilized by making the sloping sides of trench to the angle of repose at which the soil will remain safely at rest. DBO Operator Generation of substantial debris, top soil and muck during construction Temporary Top soil shall be preserved and may be used for agricultural purpose or development of city parks. Soil and debris may be managed for planned land filling and landscaping; Debris may be suitably stored to filling back the excavated areas after placing the trunk sewer lines. DBO Operator Dust Generation (Air Pollution) due to excavation, cutting, back filling and compaction operations Temporary sprinkling over excavated areas, unpaved movement areas and stockpiles. Transportation of loose construction material through covered trucks. Use dust curtains (polysheets/ sheets) around the construction area DBO Operator
SFG1690-V9-EA-P119085-Box394860B-PUBLIC-Disclosed-2-1-2016.docx