NIT. NO. 12 (2019-20)/EE (SDW) VIII / ITEM NO.1

Arrangement of all safety equipments for the protection of staff to work at height and to make the working area free from all toxic gases and free from accident during working at site as per NHRC guidelines.

Dismantling and removing the worn out and damaged MS Fine Bar screen and elements for the screen cutting and removing the supporting M.S channels plates and Angles, from the Screening Chamber with the help of Gas-Cutter, Power hammer, hydraulic mobile crane and heavy labour. Stacking the material inside the premises.

Fabrication of SS (304 No.) Fine bar screen (Jali) of size 2 mtr long and 2 mtr width by fabricated of outer frame by SS Angel of size 75 X 75 X 10 mm and inner portion fabricated by SS. Flat of size 65 X 8 mm duly welded one by one at 8 mm gap in each flat and fixing in sewage channel by making of clamping system on upper side of bar screen for fixing of chain as per site requirement.

Under sewage water cutting /Grinding/Drilling /welding in wall including chipping of solid concrete deposited in joint of chamber. For fixing of SS Jaal deep under the sewer water from top to bottom on both the side and on the downstream of chamber the work include underwater drilling with underwater numetic drill machine and thereafter fixing of anchor bolt on the SS Jaal, underwater grinding and cutting of SS Jaal wherever required, underwater grinding etc and other work required for fixing of SS Jaal deep under the toxicated water. Work is to done under deep water with the help of underwater divers. The work also includes repairing of chamber to accommodate the new SS Fine Bar-Screen with complete civil work with civil material so as to mount new SS Fine Bar-Screen. Breaking of bottom floor with the help of electric hammer and remaking of new floor as per requirement of new SS Fine Bar-Screen.

Providing services of underwater divers to carry out various under sewage water work on Nazafgarh plant. For underwater concrete/epoxy on Both the side from top to bottom of MSU Channel fitted inside the chamber the work include cost of Epoxy and services of divers for completing the work.The divers team should be equipped with diving equipment such as Diving air control panel, Diving suit, Compressor, oxygen cylinder etc and other under water equipment required at site

Hiring charges of undersewer air lift machine with 4inch delivery pipe for sucking of sludge with the suction line from the sump where the Bar-Screen Should be rest.

Hiring charges of air compressor BT-6 (running pressure 4 KG) set for operation of pneumatic air lift machine.

Hiring of long boom hydra crane for dismantling of damaged bar-screen and fixing of new SS bar –screen in the sump. This includes operator with one helper and all consumables and fuel.

Testing and commissioning of Bar-Screen on full load .