CLEANING OF OHT SEMI UNDERGROUND SWIMMING POOLS FILTER BEDS AND STP AT ANARWALA IN ZONE B UNDER AGE E/M-I OF GE DEHRADUN

DESCRIPTION OF ITEMS

Supply only Calcium Hypo Chlorite having 65%-70% Chlorine Content (Calcium based granular disinfectant) for general water treatment & swimming pool water treatment, in factory sealed container/drum (45 kg packing), complete all as specified and directed. Make : Royalseema/ Declibac/ Thermax/ Aditya birla group / Grasim Calcium Hypochlorite detailed specifications : (a) Chemical analysis & physical observations : Description : Whitish granules Granular size (Mesh passing through - 100 BSS): 1.1(+ 0.1)% Water/moisture : < 5.00% Mercury & other Heavy Metal contaminants : BDL. (b) Strength in terms of quantity of chlorination chemical required to obtain free chlorine of 1 ppm per lakh liters of water: Requirement must be 140-200 gm per one lakh liter of water to achieve 1 ppm Average at injection point (site & raw water quality variations may apply additionally).

Supply of alum ferric sulphate (Grade-4) (best quality as per sample) for purification of water (containing lead (as PB) 30 ppm max and arsenic 6ppm max) confirming to IS-299/2012 (Revised) as amended up-to-date complete all as specified and directed. (Note:- The Alumino Ferric Sulphate shall be supplied in superior quality Bricks (Slabs) as per IS specifications.

Supply of stable bleaching powder Grade – I conforming to IS-1065/1989 (IInd Revision) as amended upto date having available chlorine contents minimum 34% by mass and packed in 25 Kg polythene bag having double fold complete all as specified and directed by Engineer-in-Charge and as per following specifications:- Make : Royalseema/ Declibac/ Thermax/ Aditya birla group / Grasim / Shriram Bleaching powder (Calcium Hypo Chloride), Chlorine formula : Ca (OCl)2 Molecular weight : 142.96, Physical Appearance : white fine powder, Chlorine content :- 30 % ± 1%, Moisture : 0.5 % Max On heating at 10 ± 2°C it dose not lose more than 1/15 of available chlorine Passing through 1.7mm sieve : 99%

Supply only lime of superior quality complete all as specified and directed.

Supply of poly aluminum chloride AC-100S powder inorganic soluble polymer powder effective in both high and low turbidity for rapid and better floc formation with much lower dosing rates, less sludge rates, less sludge generation, less PH reduction in factory sealed container/ plastic bag of 25 Kg each, complete all as specified and directed. Make: DECLIBAC / Thermax/ Aditya birla group

Supply only alum crystal for swimming pool complete all as specified and directed.

Supply only coper sulphate for swimming pool complete all as specified and directed.

Supply only Soda ash for swimming pool complete all as specified and directed.

Supply only HCL for cleaning of swimming pool complete all as specified and directed.