Cleaning of overhead tank, underground sump and filtration plant and repairing pipe line at BSF Campus Gandhinagar under Ftr HQ BSF Gujarat

Amount

12 mm cement plaster finished with a floating coat of neat cement of mix : 1:4 (1 cement: 4 fine sand)

Cleaning of terrace/loft water storage tank (inside surface area) upto 2000 litre capacity at all heights with coconut brushes, duster etc., removal of silt, rubbish from the tank and cleaning the tank with freshwater 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)

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.

Providing and fixing gun metal non- return valve of approved quality (screwed end) : 80 mm nominal bore Vertical

Providing and fixing C.I. sluice valves (with cap) complete with bolts, nuts, rubber insertions etc. (the tail pieces if required will be paid separately) : 100 mm diameter Class II

Supply and filling of filter media of standard sized particles for perforted pipe under drain system in different layers as per standerd practice into existing rapid sand filter bed area and removing of existing filter media (Manually by civil Labours) from existing rapid sand filter bed area (Located in closed room at first floor of WTP) Filter Gravel free from excessive amount of limestone or shells and acid solubility determine in acordance with IS 8419-1(1977) & shall be free from clay, sand, loam and organic impurites of any kind. Size (12-25 mm)

Supply and filling of filter media of standard sized particles for perforted pipe under drain system in different layers as per standerd practice into existing rapid sand filter bed area and removing of existing filter media (Manually by civil Labours) from existing rapid sand filter bed area (Located in closed room at first floor of WTP) Filter Gravel free from excessive amount of limestone or shells and acid solubility determine in acordance with IS 8419-1(1977) & shall be free from clay, sand, loam and organic impurites of any kind. Size (06-12 mm)

Supply and filling of filter media of standard sized particles for perforted pipe under drain system in different layers as per standerd practice into existing rapid sand filter bed area and removing of existing filter media (Manually by civil Labours) from existing rapid sand filter bed area (Located in closed room at first floor of WTP) Filter Gravel free from excessive amount of limestone or shells and acid solubility determine in acordance with IS 8419-1(1977) & shall be free from clay, sand, loam and organic impurites of any kind. Size (4-8 mm)

Supply and filling of filter media of standard sized particles for perforted pipe under drain system in different layers as per standerd practice into existing rapid sand filter bed area and removing of existing filter media (Manually by civil Labours) from existing rapid sand filter bed area (Located in closed room at first floor of WTP) Filter Gravel free from excessive amount of limestone or shells and acid solubility determine in acordance with IS 8419-1(1977) & shall be free from clay, sand, loam and organic impurites of any kind. Size (0.4-2 mm)

Supply and installation testing and commissioning of tube settler media Square tube 3.10x2.55x1.00 Mtr

Testing, Re-filling of Clorine Gas Cylender (100 Kg capacity gas Cylender as per required safty norms for water filtration plant including testing and carriage charge etc are required as per direction of engineer in charge.