ROUTINE PREVENTIVE AND CORRECTIVE MAINTENANCE AND CLEANING OF SEWAGE SYSTEM AND CONNECTED WORK IN N-4 AREA,NARENDRA GROUND, RAMA DEVI AT AF STN CHAKERI

Cleaning of the chocked/blocked sewage lines of any bore through mechanically by Jet Machine or any mechanical means between manholes and removing muck sludge/silt/liquid mud etc (incl foul position) from pipes including taking down cover slab of any type, thickness and size carefully and refixing in same position after necessary cleaning and removing the cleaned sludge out side of MD land in sealed containers on same day, all as specified and directed not exceeding 1.50 m depth.

All as per item No 1 here-in-before but exceeding 1.5 m and not exceeding 3 m depth.

Cleaning of the chocked/blocked manholes/Gully trap/Nahani Trap/Floor trap, not exceeding 1.5 m depth, mechanically by Jet Machine or any mechanical means opening the covers, removing liquid/sludge mixed liquid under any position including foul condition and cleaning the inlets and outlets etc with water, placing the cover back in position and dispoing off the same in sealed container on same day, out side of MD land complete all as specified and directed.

All as per item No 3 here-in-before but exceeding 1.5 m and not exceeding 3 m depth.

Demolition or breaking up drain pipes150 mm internal dia of bore (salt glazed ware AC or reinforced concrete) set in cement mortar including breaking and removal of bedding and hunching complete.

-ditto as as per item No-5 here-in-before but 200 mm internal dia of bore

M&L cement concrete 1:3:6 type C2 using 40mm graded stone aggregate as in bed to drain pipes of 150 mm bore including packing under and haunching against the sides of pipes after they are laid and tested as specified.

-ditto as as per item No-07 here-in-before but 200 mm internal dia of bore

M&L for Reinforced concrete pipes of dia 150mm class NP2, laid and jointed complete with collars

-ditto as as per item No-09 here-in-before but 200 mm internal dia of bore