Maintenance and cleaning of Sewage line including Manholes Floor Traps Gully Traps septic tanks storm water drains and other connected items at HQ GNA INS Gomantak and allied units under GE Gomantak Vasco

Excavation in trenches in soft/disintegrated rock, n exc 1.5 m wide and n exc 1.5m in depth; for foundation, etc. or for shafts, wells, cesspits, manholes, pier holes, etc. n exc 10 sqm on plan and getting out complete all as specified and as directed.

Excavation in trenches not exceeding 1.5 m wide and exceeding 1.5 m but n. exc. 3 m deep in soft/disintegrated rock for foundation, etc. or for shafts, wells, cesspits, manholes, pier holes, etc. and getting out complete all as specified and directed.

Returning filling in including spreading levelling, watering and well ramming in layers n.exc 25 cm thick in any type of soil/rock complete all as specified and directed.

Removing excavated material (Soils/rock) to a distance not exceeding 50 m and depositing where directed at a level n.exc. 1.5 m above the starting point complete all as specified and directed.

M&L for cleaning of sewage line of any diameter and any description including in between manholes, manually or mechanically to clear the sludge/ blockage inside the sewage line and manholes by taking of mud/ sludge water/ night soil, salted soil and flushing with water to drain out sludge etc. to ease the flow of sewage including removing the sludge from site and re-fixing manhole covers properly complete all as specified and directed. NOTE:- (i) Line cleared and measured once will not be measured again within next two months. In case of blockage re-occure in the same line within two months contractor will clear the same without any extra cost to the Govt.

S&F in repair PVC (SWR) pipe 150 mm bore, single socketed, in any length with rubber ring joints and jointed with approved adhesive and laid in trenches or in floors complete all as specified and directed.

S&F in repair Reinforced concrete pipes, class NP-2, 150 mm bore, laid in trenches and jointed in CM 1:1 complete with collars and tested all as specified and directed.

S&F in repair Reinforced concrete pipes, class NP-2, 300 mm bore, laid in trenches and jointed in CM 1:1 complete with collars and tested all as specified and directed.

M&L for concrete bed in PCC 1:3:6 type C-2 ( using 40 mm graded stone aggregate) as in bed to drain pipes including packing under and haunching against the sides of pipes after they are laid and tested for 150 mm bore pipe complete all as specified and directed.

S&F in repair PVC (SWR) pipe 110 mm bore, single socketed, in any length with rubber ring joints and jointed with approved adhesive and fixed to walls in foul condition complete all as specified and directed.