REPAIR AND MAINT TO EXTERNAL WATER SUPPLY, BOREWELLS, CLEANING OF OHT AND UG SUMPS INCLUDING LAGGING TO EXTERNAL PIPES AT HQ 10 SECT RR AND 29 RR UNDER AGE (I) CIF (K)

M & L for cleaning of Overhead reservoir at the staging of 21m by draining out of water below supply level, removing all internal sludge by washing. Cleaning the surface of the reservoir using wire brushes and other scraping tools to remove dirt and scales to make it free from deposits. Washing the reservoir with pressure compressor nozzle thoroughly and removing dirty water from the tank to make it clean. Repair to internal surfaces by plastering and providing fillers cracks to prevent any seepage of water and white washing to complete internal wall and floor of chamber. Disinfecting the sump surface using disinfectent complete all as specified and directed for 50000 GLN capacity. Note- The work of cleaning and disinfection will be carried out by experts in the field of work.The work is to be carried out in such a way that the water supply is not disrupted.

Ditto as per item No 1 as above but under ground sump of capacity 60000 GLN . Note- The work of cleaning and disinfection will be carried out by experts in the field of work.The work is to be carried out in such a way that the water supply is not disrupted.

M & L for taking out damaged/ broken lagging from pipes and providing lagging on pipes of 20/15 mm bore, all around with 25 mm thick bonded mineral wool preformed 'SNAPON' pipe sections of density 144 Kg/cum with chicken mesh wire netting 25 gauge, 20 mm mesh and covering with POP layer complete all as specified and directed at site by the Engineer - in- Charge.

M & L for taking out damaged/ broken lagging from pipes and providing lagging on pipes of 25 mm bore, all around with 25 mm thick bonded mineral wool preformed 'SNAPON' pipe sections of density 144 Kg/cum with chicken mesh wire netting 25 gauge, 20 mm mesh and covering with POP layer complete all as specified and directed at site by the Engineer - in- Charge.

Excavation in trenches n.exc. 1.5 mtr wide and n.exc. 1.5 mtr in depth, for taking out/laying of DI/CI/ GI Pipes and getting out Hard/dense soil by JCB Machine /manually as per site requirement complete all as specified and as directed.

Returning, filling in including spreading, leveling watering and well ramming in layers in Hard/dense soil complete all as specified and as directed.

Removing excavated materials n.exc 50m and depositing where directed at a level n.exc 1.5m above the starting point, complete all as specified and as directed.

Taking out GI Pipe 20 mm bore with all fittings and accessories etc, from trenches/ surface and removing blockage and damaged pipe complete including cleaning the serviceable pipe for re-fixing all as specified and as directed. Note:- Excavation/earth work shall be measured and paid for separately.

All as per item No 8 here in before but for 25 mm GI bore pipes.

All as per item No 8 here in before but for 40 mm GI bore pipes.