A/R and M/O various residential and office buildings under South-East (Building)M, PWD, Hauz Khas, New Delhi during 2025-26 (SH Mechanized cleaning of Underground and Overhead RCC/PVC water storage tanks).

Mechanized cleaning of Underground & RCC/PVC OH tank with six stages process mentioned under:-Mechanical Dewatering. Desilting and removal of left over dirty water and sludge with sludge removal pump. Cleaning of walls, ceiling and floor by high pressure water jet with the help of equipment which create a pressure of 100 to 150 bar with antibacterial agent license from food and Drugs administrative (FDA) and certificate by a Govt. approved laboratory for non-toxicity of antibacterial for tank cleaning as per OECD guidelines for disinfecting the tank from all harmful Bacteria, Fungi, Algae & Protozoam. The active ingredient shall be Benzalkonium Chloride solution IP 4% W/V/ Equvasimilar Compound as per the direction & approved by Engineer-in-Charge. Removal of remaining sludge from the floor with the help of industrial vacuum cleaner. Spraying of Non-toxic, bio degradable eco friendly anti- bacterial agent for tank cleaning certificate by Govt. approved laboratory as per the OECD guideline 423 adopted on 17th December 2001 for disinfect the tank from all the harmful pathogens." Treatment of inside the tank by exposing U.V radiation to kill further suspended or floating bacteria if any.

PVC/RCC/O/H tank up to 5000 liters capacity.

PVC/RCC/ underground & overhead water storage tank having capacity of above 5000 liters.

Lettering with black japan paint with lettering stencil having not less than 10 cm height of letters depicting date, month and year (e.g.15.08-2014, 14-11-2014 etc)on water tanks including painting over existing old letters including cost of stencil plates complete as per direction of the Engineer-in-Charge