Special repairs to Dewatering, Desilting, cleaning and chlorination of Male and Female ward open well in Government Arignar Anna Memorial Cancer Hospital at Karapettai, Kancheepuram in Kancheepuram District.

Providing and carrying out dewatering of the open well up to 9.50 meters depth using a suitable capacity submersible or centrifugal pump. The pump shall be operated continuously to lower the water level to a workable depth for cleaning. Dewatered liquid shall be drained to an existing drain or any other safe location as directed. The work shall include all necessary hoses, power connections, labour, tools, and safety measures. All operations shall be carried out using proper PPE and under the direction of departmental officers.

Providing and carrying out manual removal of settled silt, sludge, organic waste, and other foreign matter from the bottom of the well using iron buckets with rope or chain pulley system. The iron grill or mesh at the top shall be carefully dismantled prior to desilting and securely refixed after completion. The scope includes all labour, tools, lifting equipment, safety harnesses, PPE, and the transportation of removed sludge and debris to outside the campus to a designated disposal location, all as directed by the departmental officers.

Supplying and applying disinfection treatment to the open well after cleaning, which includes scrubbing the inner walls with a hard brush and bleaching powder solution. After clean water has percolated into the well, the water shall be disinfected using bleaching powder at 50 grams per 1000 litres or equivalent chlorine tablets. The rate shall include all labour, materials, disinfectants, tools, and safety measures. All operations shall be completed as per standard sanitary procedures under the supervision of departmental officers.