bids are invited for custom bid for services - parta for technical service charges lump sum rate technical services inclusive of cost of providing dosing system and monitoring equipment instruments as per scc and sow , custom bid for services - part b1 for chemical consumption for regular treatment of cooling tower hvac cooling tower and chilled water including chemicals for one time changeover as per scc and sow , custom bid for services - part b2 for chemical consumption for passivation once in a year during plant shutdown or during suitable time for main cooling tower system as per scc and sow , custom bid for services - part b3 for chemical consumption for regular feed water treatment programme of boiler as per scc and sow , custom bid for services - part b4 for contingencies chemicals for one instance each as per scc and sow , custom bid for services - part c for suplhuric acid and chlorine quantity required for main cooling tower as per scc sow and sor - operation and maintenance of water supply systems total quantity :