tender for supply and laying of filter media and supply and fixing of umbrella nozzel as per old estimate at 4.5 mgd filter plant, bhopal , removing of old filter media from filter bed and stacking the same with in 50 mter lead as per instruction of engineer incharge , chemical cleaning of filter media by the chemical which is approved by the engineer in charge size above 20 mm and separating and grading the same in three size by sieve 40 mm to 65 mm, 20 mm to 40 mm and 3 mm to 6 mm, refilling the same in flter bed in three layer with in a 50 mtrs lead as per instruction of engineer incharge (1)filter media bed (7.2m x 5.5m2) (a)40mm to 65mm (4x7.2x5.5x0.15=23.76) , chemical cleaning of filter media by the chemical which is approved by the engineer in charge size above 20 mm and separating and grading the same in three size by sieve 40 mm to 65 mm, 20 mm to 40 mm and 3 mm to 6 mm, refilling the same in flter bed in three layer with in a 50 mtrs lead as per instruction of engineer incharge (b)20mm to 40mm (4x7.2x5.5x0.1=15.84) , chemical cleaning of filter media by the chemical which is approved by the engineer in charge size above 20 mm and separating and grading the same in three size by sieve 40 mm to 65 mm, 20 mm to 40 mm and 3 mm to 6 mm, refilling the same in flter bed in three layer with in a 50 mtrs lead as per instruction of engineer incharge (c)3mm to 6mm (4x7.2x5.5x0.1=15.84) , chemical cleaning of filter media by the chemical which is approved by the engineer in charge size above 20 mm and separating and grading the same in three size by sieve 40 mm to 65 mm, 20 mm to 40 mm and 3 mm to 6 mm, refilling the same in flter bed in three layer with in a 50 mtrs lead as per instruction of engineer incharge (2)filter media bed(5m x 6m) (a)40 mm to 65mm(2x5x6x0.15=9) , chemical cleaning of filter media by the chemical which is approved by the engineer in charge size above 20 mm and separating and grading the same in three size by sieve 40 mm to 65 mm, 20 mm to 40 mm and 3 mm to 6 mm, refilling the same in flter bed in three layer with in a 50 mtrs lead as per instruction of engineer incharge (b)20mm to 40mm (2x5x6x0.1=6) , chemical cleaning of filter media by the chemical which is approved by the engineer in charge size above 20 mm and separating and grading the same in three size by sieve 40 mm to 65 mm, 20 mm to 40 mm and 3 mm to 6 mm, refilling the same in flter bed in three layer with in a 50 mtrs lead as per instruction of engineer incharge (c)3mm to 6mm (2x5x6x0.1=6) , removing of old pvc umbrella nozzle filter type and cleaning the same and fixing after cleaning as per instruction of engineer incharge , providing and fixing of pvc umbrella nozzle candy filter type as per instruction of engineer incharge , supply and fixing of air nipple as per instruction of engineer incharge , supply and laying of coarse sand 0.5 mm to 1 mm and fairly uniform fine sand 0.25 mm to 0.40 mm. grain free from lime stone as per instruction of engineer incharge (fine sand supplied only from godhra river) (1)filter media bed(7.2m x 5.5m) (a)0.5mm to1mm(4x7.2x5.5x0.15=23.76) i/c transportation , supply and laying of coarse sand 0.5 mm to 1 mm and fairly uniform fine sand 0.25 mm to 0.40 mm. grain free from lime stone as per instruction of engineer incharge(fine sand supplied only from godhra river) (b)0.25mm to 0.40mm(4x7.2x5.5x0.0.7=110.88) i/c transportation , supply and laying of coarse sand 0.5 mm to 1 mm and fairly uniform fine sand 0.25 mm to 0.40 mm. grain free from lime stone as per instruction of engineer incharge (fine sand supplied only from godhra river) (2)filter media bed(5m x 6m) (a)0.5mm to 0.1mm(2x5x6x0.15=9) i/c transportation , supply and laying of coarse sand 0.5 mm to 1 mm and fairly uniform fine sand 0.25 mm to 0.40 mm. grain free from lime stone as per instruction of engineer incharge (fine sand supplied only from godhra river) (b)0.25mm to 0.40mm(2x5x6x0.7=42) i/c transportation , supply and reparing of pvc solution line 80 mm isi mark and cleaning the nozzle pipe and fixing the same after cleaning each as per instruction of engineer incharge , providing and inserting nipple with approved fiixng compound after drilling holes for grouting as per technical specification including subsequent cutingremoval and sealing of the hole as ecessary of nipple after complection of grouting with cement epoxy and as per relevant clauses of section 2800 , sealing of cracks/porous concrete by injection process through nipples/grouting complete as per technical specification and asper relevant clauses of section 2800 @3kg each nipple