Public Works Department Tender

Supply at Store/Site of work including ,transportation, loading & unloading, freight insurance etc., of Sodium Hypochlorite containing 12.5% to 15% of Chlorine Concentration or as required, Suitable for water treatment plant, filled in HDPE can of uniform weight, including re-transporting empty HDPE cans from departmental store/site to refilling plant etc., Complete.as directed by Engineer in Charge.

Repairs to Pressure Sand filter (Shell) by opening the Manhole Cover, removing out the total quantity of filter media approximate 24 MT manually with labourers from the filter shell which includes Sand, Pebbles of different sizes arranged in layers over a depth of 1000mm inside the pressure sand filter shell. Replacing all the damaged and broken porforated PVC pipes of length 1 mt. & dia 2 1/2" with necessary end caps and MTA, making necessary joints to the main water outlet pipe. De rusting the scale formation on the entire inner surface of the pressure filter shell, cleaning and flushing it out. Cleaning the entire filter media material viz Sand, Pebbles outside with pressurised water, segregating the pebbles according to the sizes, refilling the entire filter media by arranging according to the marked layers and required depth till the shell is complete with total filter media material and sand layer including providing additional sand filter media if required and closing the Manhole Cover Complete as required by the Engineer-in-charge.