REPAIRS TO SEWAGE LINES, MANHOLES, COVER SLABS, HUME PIPE CULVERTS INCLUDING CLEANING OF CHOCKED SEWAGE MAINTENANCE WORKS AT MH/MD AREA OF AGE B/R-II UNDER GE GOLCONDA

Maintenance of sewage system SGSW/PVC/RCC pipe including Nahani / floor traps, Soil/waste pipe running on external wall of building and in trenches with fittings like bends, junctions, etc. gully traps, manholes of all description and sewage lines of all sizes upto soak well of sewage system including dewatering of soak wells complete in perfect running/flowing order without destruction by removing all blockage in the system including de-watering from soakage well by pumping out as directed as and when required including PCC/Brick drain in running condition by removing all surplus spoil in Md, OTM and Tech Accn in MH/MD areas, complete all as specified and as directed. Notes :- (i) Contractor shall deploy minimum 2 safaiwalas solely for the maintenance of sewage system against this item. These safaiwalas shall not be deployed for any works other than the scope catered for in this item and will report to the respective complaint cell and will be issued daily complaint slips by the JE i/c. For the work catered against other items of this Schedule, the contractor shall deploy separate safaiwala in addition to the safaiwala deployed against this item. (ii) The shift time will be decided by JE/Engr-in-Charge and can be changed at any time as per requirement. However the timings for the day shift of 8 hours shall be from 0830 Hrs to 1730 Hrs with a lunch break from 1300 hrs to 1400 hrs with weekly holiday on sunday. (iii) The rate quoted is deemed to be inclusive of the cost of T&P for maint / cleaning work. (iv) Penal recovery for absence of workers / technical supervisor on any day lesser than the specified minimum strength shall be as under:- (a) Safaiwala - Rs. 2300.00 Per day per person (v) Solid waste / sludge / silt deposited in the manholes which can not be removed by rodding, shall be ordered under respective item of this schedule and paid accordingly.

Cleaning of septic tanks completely by empting the liquid / semi solid foul contents mechanically as specified completely, cleaning inlets and outlets etc including disposal of soil sludge outside MD land completely all as specified.

Thorough cleaning of sewage manholes / inspection chambers of any size and depth upto 1.2m from GL. The work involves: (a) Opening of manhole covers and providing adequate ventilation to ensure the escape of toxic gases (H2S, Methane). (b) Manual or mechanical removal of accumulated sludge, silt, grit, solid waste, and any other obstructions from the floor, benching, and channel of the manhole. (c) Scrubbing of internal walls and benching to remove fungal growth/algae. (d) Immediate removal and carting away of the extracted sludge from the premises in sealed containers to the outside of MD land complete all as specified and as directed.

Thorough cleaning of sewage manholes / inspection chambers of any size and depth more than 1.2m from GL. The work involves: (a) Opening of manhole covers and providing adequate ventilation to ensure the escape of toxic gases (H2S, Methane). (b) Manual or mechanical removal of accumulated sludge, silt, grit, solid waste, and any other obstructions from the floor, benching, and channel of the manhole. (c) Scrubbing of internal walls and benching to remove fungal growth/algae. (d) Immediate removal and carting away of the extracted sludge from the premises in sealed containers to the outside of MD land complete all as specified and as directed.

Systematic clearing of accumulated solid waste, silt, grit, and sludge from internal / external sewage pipelines / hume pipe culverts of diameters up to 300mm. The process includes: (a) Use of high-pressure hydro-jetting machine with specialized nozzles to break down hardened silt and flush it towards the downstream manhole. (b) Where mechanical jetting is restricted, use of flexible sewer rods with appropriate attachments (cutters/scrapers) to dislodge blockages. (c) Continuous flushing with water to ensure all dislodged debris is captured at the manhole and removed manually. (d) Verification of the "clear bore" by performing a ball test or a flow-gradient test between two consecutive manholes. Work includes the disposal of all extracted waste in sealed containers to the outside of MD land complete all as specified and as directed.

Systematic rectification of leakages at the entry and exit pipe junctions within the manhole by Chipping away failed cement mortar or old "benching" around the pipe circumference to a depth of 50mm. And applying a high-strength, fast-setting, non-shrink hydraulic cement or epoxy-modified mortar to seal the annular space between the pipe and the wall. complete all as specified and as directed

Excavation in trenches n.exc 1.50m wide and n.exc. 1.50 m depth and getting out in hard/dense soil.

Excavation in trenches n.exc 1.50m wide and depth exc. 1.50 m but n. exc 3 m and getting out in hard/dense soil.

Excavating over areas, n exc 1.5 m deep and getting out mud, vegetation, debris of brickwork, concrete etc complete all as specified and as directed

Earth work in excavation in all kind of soil by mechanical means (Hydraulic excavator)/ in foundation trenches or drains (not exceeding 1.5 m in width or 10 sqm on plan), including dressing of sides and ramming of bottoms, lift upto 1.5 m, including getting out the excavated soil and disposal of surplus excavated soil as directed, within a lead of 50 m.