Providing Polyethylene Glass Lining and allied works for the existing Over Ground Solar Evaporation Pond (OGSEP) at NFC, Hyderabad.

General Notes: 1. The contractor shall follow relevant IS codes/technical specifications for execution of work. 2. The contractor shall maintain good workman ship and follow safe working procedures during the work. 3. Rates are inclusive of Scaffolding for all items for all heights. 4. Shuttering wherever required shall be carried out at no extra cost. 5. Leak test including filling of water and empty the tank (OGSEP) after test shall be carried out for the tank as per IS 3370 for requirements of watertightness, corrective action to ensure watertightness of the structure if any shall be done as per directions of EIC at no extra cost. 6. Removal of laitance/scales from OGSEP shall be done at no extra cost. 7. Contractor shall provide one nos of Construction Distribution board along with incoming power cable of required length (as per availability of nearest power source at site) as per NFC specifications for obtaining the temporary power supply for the works at no extra cost. 8. Contractor shall fill the requisition form for providing temporary power supply and details of any equipment to be used at site (dewatering pump, cutting machine, drilling machines, etc. shall be indicated in the proforma annexed to requisition form. 9. Contractor shall employ a licensed electrician to carryout electrical connections /terminations, measurement of earth pit resistance, insulation resistance of their installation and intimating the same to the department & also earthing shall be ensured throught existance of power supply. 10. Intimation shall be given after completion of work for disconnection of supply and safe isolation of DB with last energy meter reading.

Chipping of old unsound concrete surface to expose good concrete, removal of plaster if any, expose corroded reinforcements beneath unsound concrete to the extant of upto 100 mm in thickness including disposal of obtained debris within 50m lead, complete as directed by EIC.

Injection Grouting using Cementitious grout admixed with SBR - Styrene Bitadiene Styrene  Providing and Fixing 18mm/12 mm or any other dia GI/PVC nozzles  (the nozzle shall be embedded about half the depth of the member to be grouted) in grid pattern at a spacing not more than 1m c/c along damaged/distressed area and in construction joints by drilling holes using  drill machine and to be packed with polymer modified mortar of make Pidilite/Fosroc /SIKA/BASF/ Sunanda/ Krishna or any other approved equivalent make., grouting to be carried out with cement grout by mixing one bag of cement with one pouch of expansive plasticising admixture and 1 kg of SBR latex of make Pidilite (Dr Fixit Pidicrete AM and Dr fixit Pidicrete URP)/Fosroc or approved equivalent, removal of nozzles post grouting and plugging with Renderoc Plug of Fosroc or approved equivalent, complete as directed by EIC. (Record shall be maintained for number of grout holes and cement consumption in each hole)

Injection Grouting using Moisture Insensitive Epoxy Grout For strengthening the various members of the Concrete Segments, GI/PVC Nozzles shall be made in weak areas or at intervals of 1 metre centre to centre, and the same shall be injection grouted with Moisture Insensitive Epoxy Grout of Pidilite Industries Limited's make- Dr. Fixit Epoxy Injection Grout /equivalent material of Fosroc /SIKA/BASF/Sunanda/ Krishna or any other approved equivalent make. After the grouting is complete the nozzles shall be cut and the area shall be sealed with Renderoc Plug of Fosroc or approved equivalent, complete as directed by EIC. (Records shall be maintained for number of grout holes and material consumption in each grout point.)

Cleaning Re-bars & Steel Surfaces Cleaning of reinforcement from rust from the reinforcing bars to give it a total rust free steel surface by using alkaline chemical rust remover of Pidilite Industries Limited's Dr. Fixit Rust Remover /equivalent material of Fosroc/ SIKA/BASF/Sunanda/ Krishna or any other approved equivalent make with paint brush and removing loose particles after 24 hours of its application with wire brush and thoroughly washing with water and allowing it to dry, all complete as per direction of Engineer-In-Charge.

Anti-corrosive Primer for Reinforcement. Providing and applying Pidilite Industries Limited's make- Dr. Fixit Zinc Rich Primer /equivalent material of Fosroc /SIKA/BASF/Sunanda/ Krishna or any other approved equivalent make which confirms to BS 4652 1995 Specification for Metallic Zinc Rich Priming paint Type 2 and mixing mechanically until it is homogenous and applying the same as one rich coat on reinforcement complete with all lift etc. complete as directed by EIC. (If corrosion found on rebars)

Providing New Rebars Removing the existing deteriorated reinforcement and supply and placing of new rebars of suitable diameter including cutting, bending and straightening and placing in position complete in all levels and if necessary, welding the new bars with the existing Rods by over lapping or drilling holes on the sound surface and fixing rebars using suitable epoxy acrylate based anchoring material. with all lead and lift etc. complete (If the rebar is corroded more than 25% of its original size). Additional rebars of suitable diameter shall be provided with the help of shear connectors. The shear connectors/TMT bars are provided in the repair area in a grid pattern of 200mm x 200mm by drilling holes of 12mm diameter to a depth of 150mm. The drilled holes shall be grouted with epoxy acrylate based anchoring material of BASF/ Sika/ Pidilite/ Fosroc/ Sunanda/ Krishna or any other approved equivalent make. Note: Only the weight of TMT bars used shall be measured for payment.

Repair Mortar for Refurbishment of Damaged concrete Providing and applying as per manufacturer's specification High Strength and High Build Dual Shrinkage Compensated Repair Mortar of Dr. Fixit Polymer Mortar HB /equivalent material of Fosroc /SIKA/BASF/Sunanda/ Krishna or any other approved equivalent make, complete as per manufacturer's specifications and as directed by EIC.

Supplying and applying 2(Two) coats of aliphatic acrylate breathable protective coating for RCC structure viz., DECKGUARD S of make M/s. Fosroc Chemicals India Ltd.,/ Monopol -456 of M/s. Sunanda Chemicals/ M/s. Krishna Conchem Products Pvt., Ltd., or any other approved equivalent along with 1(One) coat of primer viz., DECKGUARD PRIMER/ or M/s. Sunanda Chemicals having component of penetrating Silane Silaxone. Surfaces containing blow holes or similar areas of pitting should first be filled using RENDEROC FC or approved equivalent. The coating should have Dry Film Thickness (DFT) of minimum 150microns. The coating should have the properties viz., (1)Excellent protection against carbon dioxide ,chloride ions, sulphates, oxygen and water. (2)Highly UV resistant to the effects of long term weathering. (3)Allow water vapour to escape from the structure. (4) Highly durable in all climatic conditions. The coating should be applied on the finished concrete surfaces (Both External & Internal) , at all heights above plinth level along with necessary scaffolding , applying with suitable means as per manufacturer's recommendations and specification etc., complete and as specified and directed. NOTE: The thickness of coating of minimum 150microns DFT should be ensured at every point of time during painting

Removing dry or oil bound distemper, white or colour wash/lime punning/ water proofing cement paint/any other type of paint and the like by scrapping, sand papering, buffing using manual/mechanical methods and preparing the surface smooth including necessary repairs to scratches etc. complete as per directions of EIC.