short dated tender - bids are invited for providing non pathogenic bacterial bio culture for biological treatment of sewage in stp , providing suitable grade molasses as carbon source for biological treatment of sewage in stp , providing chlorine solution having available chlorine content 9 to 10 percent for stp , providing split leather industrial safety gloves or gauntlets for maintenance works , providing 2 inch upvc foot valve with strainer and non return valve for water pumping system , repairing and rewinding of 1 point 5 hp monoblock pump set complete in all respects , repairing and rewinding of 3 hp monoblock pump set complete in all respects , repairing and rewinding of 2 hp monoblock pump set complete in all respects , cleaning of sewer tank by diesel operated suction cum jetting sewer cleaning machine , taking out stone and sand from filter media tank and refilling after cleaning and dechoking , supplying and filling stone boulders of size 5 cm to 20 cm in stp filter media tank , supplying and filling gravels of size 5 mm to 10 mm in stp filter media tank , supplying and filling coarse sand of size 1 point 5 mm to 2 mm in stp filter media tank