COMPREHENSIVE MAINTANENCE OF SEWAGE LINE INCLUDING CLEANING OF MANHOLES AND SEPTIC TANKS ETC AND REPAIRS TO SEWAGE LINE IN MD ACCN AND OTM AT ZONE B AND C AT INS RAJALI NAS ARAKKONAM

Comprehensive maintenance of sewage line of various diameter and depth and floor/Nahani gully traps, water closet of various size in Married Accn and OTM accn at Zone 'B' and 'C' area with the following :- (a) Cleaning and removal of blockage/clogging in sewer lines including rodding by machineries. (b) -ditto- all as per item 1(a) hereinbefore but in manholes. (c) -ditto- all as per item 1(a) hereinbefore but in floor/Nahani/Gully traps. (d) Removal of blockage/clogging in all water closets. (e) Removal of sludge obtained from Item Ser No 1(a) to 1(d) hereinbefore complete all as specified and as directed by Engineer-in-Charge. Notes :- (i) The unit rate quoted by the tenderer is inclusive of requirement of number of persons for attending day to day maintenance of sewer lines and manholes etc. The requirement shall be assessed by the tenderer and accordingly the unit rates shall be arrived at. No extra cost whatsoever shall be admissible on this account. (ii) The contractor shall provide the sufficient labourers (minimum of 2 labourers) for the above works and they should report daily (including sundays and holidays in Emergency necessity) in the morning at 09:00 AM at O/o AGE B/R - I of GE (M) NAS Arakkonam (iii) Quoted rate including of cleaning and removal of spilled over / overflowed sewage and maintaining a hygiene environment by using proper disinfectants. (iv) Minimum 2 labourers should be provided for the above mentioned area

Pumping out sludge including water from the soak pit/septic tank/Manholes depth more than 2 M at main sewage line (i.e) not covered above Item No.1.etc. mechanically by using tipper with tanker and non clog sewage pump set arrangement including foot valve, necessary draining out pipe etc and removing all foreign materials, sludge, water including cleaning the soak pit/septic tank/manholes etc complete all as specified and directed by Engineer-in-Charge. Note : (a) The sludge removed shall be taken outside MD land for disposal as and when removed from the soak pit/septic tank/manholes. The cost of disposal shall be inclusive of the unit rate quoted by the tenderers under this item. No extra cost on this account is admissible. The credit offered by the department for the sludge removed shall be deducted from the payment made to the contractor for the entire quantity. (b) Pumping shall be carried out in the presence of MES authorises representative.

Taking off existing manholes covers & cleaning of manholes using mechanical high pressure sewer cleaning machines or similar machineries to a Depth not exceeding 1 metre by de-watering and taking off the rubbish / sludge etc., removing the same outside defence land and placing back in position the removed covers complete all as specified and directed.

All as per item No 3 as above but depth exceeding 1 metre and not exceeding 3 metre complete all as specified and directed.

All as per item No 3 as above but depth exceeding 3 metre and not exceeding 6 metre complete all as specified and directed.

Dismantling wrought iron or mild steel work of any description not otherwise provided for complete all as specified and as directed by the Engineer-in-Charge.

S&F mild steel framed work such as grills, angles, guard bars etc with ends of bars shouldered and/or riveted or forged into spikes framed guard bars and similar work conforming to Fe-290. Gde E-165 complete all as specified and directed.

Supply and fix plates (plain or chequered) channels, square cut or notched (ordinary or counter sunk) forming holes includinjg MS butt hinges and handle, confirming to Fe-290 (Gde E-165) complete all as specified and as directed by Engr-in-Charge

Excavation in trenches not exc. 1.50 m wide and not exc. 1.50 m in depth for foundation etc. or for manholes, cesspits, shafts etc not exceeding 10 Sqm on plan and getting out in soft/loose soil complete all as specified and directed.

All as item No 9 above but depth exceeding 1.50 metre but not exceeding 3.00 metre and getting out in hard / dense soil complete all as specified and as directed.