tender for clog cleaning and floating materials removal of submersible pump units for eight months at behala flying club dps under grbu(s_d).=operation of clog cleaning for 3 nos. swf and 6 nos. dwf pumps units along with cleaning & removal of floating materials from common sump chamber for the period of eight months for smooth flow of water of pumping station.total no of pump units = 9 nos.considering 3 nos. operation done per unit per month.total no of operation done for eight months = (9 x 3 x 8) =216 nos.considering 1 no mechanic, 1 no helper and 3 nos. mazdoor engaged per operation and 216 nos. operation done for six months).