Maintenance and Cleaning of sewer lines, lift stations and choke removal at North PDPM and Sadras area in DAE Township, Kalpakkam during the year 2024 - 2025.

Amount

Cleaning the underground sewer lines and manholes by Mechanical methods of sewers upto 200mm dia including opening the cover of manhole/chambers with adequate safety measures to avoid asphyxiation, roding inside the sewer line between successive chambers using motorised cable cum rodding machine of suitable capacity along with high pressure water jets to remove the obstruction/choke in sewer line, cleaning the sewer/ chambers by removing all sludge, sand grits, tree root, waste material, etc., disposing of the sludges/waste materials within 1Km lead, closing the manholes by placing the cover in its original position, cost of all tools and plants required for this item etc., all complete as directed by the Engineer-in-charge. Note: 1) The contractor shall deploy sufficient manpower and machinery such as cable cum rodding machine, water jets for efficient cleaning of sewer line with requisite supervising staff falling which, payment will not be made for defective cleaning work. 2) Sewer line shall be cleaned minimum twice in a year. 3) Frequency of cleaning of sewer line and area /length of sewer line covered shall be as per the programme available with EIC. The contractor shall follow the same scrupulously, falling which the penal recovery shall be made.

Cleaning the underground main sewer lines and manholes by Mechanical methods of sewers of following diametre including opening the cover of manhole with adequate safety measures to avoid asphyxiation, removing the obstruction/choke in sewer line by using diesel running vehicle mounting hydraulic operated high pressure jetting system of 2200 PSI, removing the sludge/ waste materials using suction machine with pump having minimum 400 litre capacity, cleaning the sewer/ chambers by removing all sludge, sand grits, tree root, waste material, etc., desilting the manhole/chamber, disposing of the sludges/waste materials within 1Km lead, closing the manholes by placing the cover in its original position, flushing the sewer line between manholes by using high pressure jetting, cost of all tools and plants required for this item etc., all complete as directed by the Engineer-in-charge. Note: 1) The contractor shall deploy sufficient manpower and machinery such as jetting machine/ sucker for efficient cleaning of sewer line with requisite supervising staff falling which, payment will not be made for defective cleaning work. 2) The work shall be executed by deploying skilled specialised manpower/ agency by deploying suitable machineries. 3) Sewer line shall be cleaned minimum twice in a year. 4) Frequency of cleaning of sewer line and area /length of sewer line covered shall be as per the programme available with EIC. The contractor shall follow the same scrupulously, falling which the penal recovery shall be made.

Sewers up to 200mm dia

Sewers beyond 200mm dia

Labour charges for cleaning dry and wet wells of the sewage lift station of about 3 metres deep from average GL by removing the accumulated sludge, sand grit etc., and disposing them with initial lead of 50 metres including cost of tools and plants required for this item all complete as directed by the Engineer-in-charge.

Labour charges for removing choke from Floor/Nahani traps and Gully/Inspection chambers from residential & Non residential buildings including removing/disposing the removed waste/debris away from the buildings within a lead of 100 mtrs., cost of all tools and plants, safety materials required for this item, etc., all as directed by the Engineer-in-charge. (Note:- The contractor shall engage minimum two trained manpower per day with required tools and machineries to carryout the work on all working days failing which penal recovery of Rs.500/day will be imposed).

Laying of Precast slab over Gully / Inspection chamber at various locations including collecting and transporting from STP, laying over the chambers as directed by Engineer - In- Charge.

Collection and conveyance of Sewage sludges settled in sewer lines, manhole chambers and individual / dedicated sewage collection tanks at various locations by using sewage lorry of minimum capacity of 5000 litres per trip including disposing at lift stations, cost of men, materials, machineries, suitable safety gears as required for this work, etc., all complete as directed by the Engineer-in-charge. [Note: Suitable precautions shall be taken while collection and disposal of sewage sludge to avoid asphyxiation.]

R.Mahadevan Civil contractor

Bidder Name

R.Mahadevan Civil contractor

V MURUGESAN