Tender For corrigendum : design supply construction and commissioning of a ozonation plant for 42 mld water treatment plant with associated civil mechanical electrical and instrumentation works including modification of rapid sand filters and operat - design, supply, construction, and commissioning of a ozonation plant for 42 mld water treatment plant with associated civil, mechanical, electrical, and instrumentation works, including modification of rapid sand filters, and operation & maintenance for 5 years ozonation plant at shikrodi water treatment plant, shimla (dbo contract) at shimla, himachal pradesh