provision for 40mm dia trial boring upto a depth of 300 mtr below gl with cost of labour, hiring of all materials including collection of soil sample at each change of layer and testing of water to acertain quality of water may be available from the proposed tube wells. ( ii ) sinking of ( 300 x 200 ) mm dia & 130 mtr deep tube well with 200 mm dia pvc strainer at tufanganj and adjoining block within tufanganj municipality under 2nd augmentation of piped water supply scheme ( iii ) designing, supplying, fabrication, erection on suitable rcc foundation commissioning with 3 month trial run and 1 year operation & maintenance ( including the cost of routine testing of water sample for performance evaluation ) of pressure type iron removal plant as per design norms of the phe dte. with necessaries viz ms fabricated shell with minimum 10 mm thick ms plate with 2 ( two ) coats of anticorrosive paint and minimum 12 mm thick ms media supporting plate fitted with required no. of pot strainer, ms fabricated oxidation chamber with minimum 10 mm thick plate with necessary pipe connection , valves, gauge, & other instruments as required as per approved design & drawing including cost of filter media air compressor & air blower with motor, starter, main switch etc. of required capacity and approved specification including power connection from main line etc. all complete and construction of one compressor room with internal size 3.6 m x 3.0 m. ( a ) 125 cum / hr capacityincluding inlet & outlet arrangement with existing rising main ( 150 / 200 dia ) by supplying, fitting fixing of cidf / ms pipe and valve arrangement with back washing provision, all complete. ( iv ) water connection at tufanganj and adjoining block within tufanganj municipality under 2nd augmentation of piped water supply scheme