ARC for water tank cleaning

Cleaning of terace or loft water storage tank or OHD RCC tanks (inside surface area) upto 3000 litre capacity at all heights with coconut brushes, duster etc, removal of silt, rubbish from the tank and cleaning the tank with fresh water disinfecting with bleaching powder at rate of 0.5 gm per litre capacity of tank lncludlng marking the date of cleaning on the side of tank body with the help of stencil and paint and disposing of malba all complete as per direction of Enginer-in-Charge. (The old date already writen on tank should be removed with paint remover or black paint and if date is not writen with the stencil or old date is not removed deduction will be madeat rate of Rs.0.10per litre) (if during cleaning any GI flttings or ball cock is damaged that is to be repaired by contractor at his own cost and nothing extra will be paid on this acount)

Cleaning of under ground sump, Over Head R.C.C. Tank (independent staging) Including disposal of slit and rubbish, all as per direction of Enginer-ln-Charge. The cleaning shall consist following operations- (i) Tank shall be emptied of water by pumping & bottom shall be cleaned Of silt and other deposits. (ii) Entire surface area of the sump shall then scrubed thoroughly with wire brush etc., and pressure washed with water. (iii) Chlorination of RCC internal surface by liquid chlorine. (iv)The treated surface shall be dried using air jetting and all loose particles shall be removal from the surface. (v)Finaly the surface shall be treated with ultraviolet radiation etc.as per direction of Engineer-in-Charge.