NIT No-24 EE (SDW) II/ (22-23) Item No. 20

Strengthening of pathway and structure along with allied works of primary clarifier No.2 at 45 MGD STP Okhla by carried out the following works, including All the required works , materials, arrangements , tools & tackles , workmanship , safety equipment’s as per NHRC\NGT\ DPCC etc guidelines and as per site requirement , remodeling all the damages up to standard if occurred any complete in all respect as per requirement satisfactorily.

Isolating the PST by operating / closing the sluice gate up to leakage proof condition, providing & fixing the gunny bags fully filed up with sweet earth to ensure no leakage in the PST. Dewatering completely the PST with the help of sewage submersible sump pump sets along with proper capacity D.G. Set, cleaning the PST with the help of machines/manually for execution the work as per the site requirement in all respect satisfactorily complete.

Dismantling of control Gear Box along with motor, both Wheels from the Clarifier by cutting of the all fasteners etc. With the help of Gas Cutter and shifting the same to the safe workable place at site satisfactorily without any mishap with any of workman.

Making temporary platform by using the M.S. pipes and plates suitable sizes having all safety measures as per the safety point of view on the side of the central cage as per site requirement for dismantling of derive head in all respect satisfactorily complete.

Providing of MS chequered sheet, 8 mm thick, 0.950Mtrs. Wide in a length of 25 Mtrs. approximately by cutting of old rusted out / corroded / damaged sheets.

providing new elements of the structure made out by M.S. angle irons of size 65x65x6 M.M. approx. 60 meters & 75x75x6 M.M. approx. 70 meters & M.S. “I” Channel of size 100x50 M.M. approx. 70 meters with all required fasteners and nut bolts etc all as per site requirement satisfactorily in all respect complete.

Providing anchor bolts of different types of nut bolts and washers and spring washers as required as per site requirement satisfactorily in all respect complete.

Providing of M.S. pipe of 150 M.M. dia. C classes 8 M.M. Thickness and approx. 15 meters long for base of the turn table having the full strength as per requirement satisfactorily in all respect complete.

Providing of turn table balls made out of S.S. 40. of size 38 M.M. Dia. approx.

Replacement of strip liner of high quality S.S. spring of centre mechanism for bearing the total weight of the mechanism in question and any other if any other requirement satisfactorily in all respect complete.

Fixing of above above said complete parts of pathway of the Clarifier with anchor Bolts, M.S angle, M.S. Channel ,Chequerred sheet on pathway with required welding work and all other required tools & tackles and heavy skilled labor as per site requirement satisfactorily in all respect etc. complete.

Civil Work for Repairing of clarifier bY R.C.C. works as per site requirement satisfactorily in all respect complete.

Re-fixing of electric motor, Gear box , electric control accessories after resembling of all above parts as per site requirement satisfactorily in all respect complete..

Repairing/ Overhauling of 300 M.M. dia. C.I. D/F Sluice Valve installed in the Raw Sludge Line of PST by carrying out following works as per site requirement satisfactorily in all respect complete : - Dismantling of upper DOM of Sluice Valve by cutting of rusted & corroded fasteners with the help of welding set , electric gas cutter and all required specific tools & tackles. Taking out spindle with Nut & Sliding weight. Shifting the same to the safe workable place at site satisfactorily without any mishap with any of workman.

Providing / fixing of S.S. 40 spindle with Nut fabricated as per Sample.

Providing / fixing of C.I Gland Plate as with studs fabricated as per sample.

Providing / fixing of Key fitted/ welded with M.S. pipe in a length of 7 feet for opening/ closing of valve.

Providing / fixing of M.S. Nuts & Bolts of 5/8” x 4” long.

Providing of Red oxide metal primer in 20 kegs. Packing. Make: - Asian/Nerolec/Burger.

Providing of synthetic enamel paint in Black/deep orange Colour in 20 Ltrs. Packing’s Make: - Asian / Nerolec / Burger

Painting of the complete structure after removing of the complete dust & rust etc. with the help of emery papers, iron wire brushes with minimum two coats of primer& enamel paints i/c petty items as per site requirement etc complete in all respect.

Testing & commissioning of Clarifier after general servicing of starter, making the all-electric connections with the help of thimbles, nut and bolts etc as per requirement , testing and commissioning of the same at no load and full load satisfactorily as per site requirement complete . The work also includes contingency charges, providing of heavy labour i/c any risk & cost of the labour etc.

Gupta Brothers