National Physical Laboratory Tender

Cleaning of terrace/loft water storage tank (inside surface area) upto 10,000 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 @ 0.5gm per litre capacity of tank including 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 Engineer-in-Charge. (The old date already written on tank should be removed with paint remover or black paint and if date is not written with the stencil or old date is not removed deduction will be made @ Rs. 0.10 per litre) (if during cleaning any GI fittings or ball cock is damaged that is to be repaired by contractor at his own cost and nothing extra will be paid on this account) Campus (PVC Tank) 1st Cleaning - 63100 Ltr. 2nd Cleaning - 63100 Ltr. Total = 126200 Ltr. (A) Colony (PVC Tank) 1st Cleaning - 188050 Ltr. 2nd Cleaning - 188050 Ltr. Total = 376100 Ltr. (B) Total (A+B) = (126200+376100 = 502300)

Cleaning of under ground sump, Over Head R.C.C. Tank (independent staging) including disposal of slit and rubbish, all as per direction of Engineer-in-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 scrubbed 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) Finally the surface shall be treated with ultraviolet radiation etc. as per direction of Engineer-in-Charge. Campus (RCC Tank) 1st Cleaning - 1833.05 Sqm. 2nd Cleaning - 1833.05 Sqm. Total = 3666 Sqm. (A) Colony (RCC Tank) 1st Cleaning - 1866.47 Sqm.. 2nd Cleaning - 1866.47 Sqm. Total = 3733 Sqm. (B) Total (A+B) = (3666+3733 = 7399 Sqm.)

Cleaning of chocked sewer line by diesel running vehicle mounting hydraulic operated high pressure suction cum jetting sewer cleaning machine fitted with pump having 4000 litres suction capacity and 6000 litres water jetting tank capacity including skilled operator, supervising engineer etc. for cleaning and partial desilting of manholes and dechocking of sewer lines. Dechocking and flushing of sewer line from one manhole to another by high pressure jetting system of 2200 PSI for sewer line from 150mm dia upto 300mm Campus - 130 mtr. (A) Colony - 1078 mtr. (B) Total (A+B) = (130+1078 = 1208 mtr.)