sinking of tubewell ( 100 mm x 40 mm ) near rayreyanchak south pally crematorium, rayreyanchak under ward no. 21 and ramapada paralis house at brajanathchak uttar pally, plot no. - 7, jl - n - 196, brajanathchakunder ward no. 22within haldia municipality.the rate are based as per sor for sanitary & plumbing works effect from 01.11.17 and including 7th corrigenda & addenda effect from 22.01.2020 and as per schedule of rates with latest revision for building works ( volume - i ) ( including materials, labour & carriage ) effective from 1stnovember 2017 & including 14th corrigenda effective from 08.03.2021 ) .