tender for construction of cement concrete drain at arunthathy colony head of mulvoy panchayat , earth work excavation and depositing on bank with initial lead of 10m initial lift of 2m in hard stiff clay soil etc complete for open foundation as per ss 20 b , plain cement concrete 1:4:8 mix using 40mm hbg metal including cost and conveyance of all materials and all labour charges for mixing laying and compacting etc. complete , supply and erection of centering for all plain cement concrete item including cost and conveyance labour charges etc complete , cement concrete 1:3:6 mix using 20mm metal including cost and conveyanceof all materials to work site and all labour charges etc. , plastering with cement mortar 1:4 mix to 20 mm thick including cost and conveyance of all materials to site and all labour charges etc complete for 10 sqm , gst amount for providing service to government contract works for the above construction & maintenance works. { gst amount is the total gst amount for overall quoted amount (both construction and maintenance) above this row in column bb for all works in this package} (refer clause 13.2 & 13.3 of section 2 of instruction to bidders (itb) of sbd)