Maintenance contract for the cleaning and repairs of rectangular inspection chambers and circular manhole chambers of sewerage system at Anushaktinagar, New Mandala colony and Western Sector area, Mumbai.

Amount

ABSTRACT SHEET

PART A : MAIN ITEMS

Description of Work / Item(s)

Amount

PART A : MAIN ITEMS

Cleaning of rectangular inspection chambers and circular manhole chambers & external sewer lines including removing all settlements silt, stones, other wastes and removing chock ages thoroughly with flexible steel rods, MS rods, powdas, split bamboos, brushes and other cleaning attachments to facilitate smooth flow, closing of rat holes and other gaps around connections by PCC ( 1:2:4) & other openings, lifting the rubbish & other waste materials, transporting and dumping the same at suitable locations within 500M. Lead levelling stacking etc. all complete as directed by the Engineer-in-Charge Note:- 1.Including applying pesticide for cockroaches’ etc,@0.5 ltr/chambers. 2. The rubbish & other waste materials to be transported and deposited up to 500m lead and reinstated to original condition.

Rectangular Inspection chambers

Circular Manhole Chambers

Hiring charges for petrol/diesel operated dewatering/disludging pump upto 5 HP to 50 HP (as per requirment). for dewatering / de-sludging of manhole/chambers for removal of chockages etc. at Anushaktinagar and New Mandala Area. (The charges including fuel cost & operating cost )

Maintaining and Cleaning Chambers/Grease Trap (3+3 nos) Maintaining and Cleaning Chambers 1) Grease Trap at Sector market 2) Grease Trap at Nilgiri canteen 3) Grease Trap at Shakuntalam Hall 4)at Tapti biogas plant chamber 5) at BARC hospital security gate 6) at TSH canteen chambers, which arrest oil and solid particles during flow, are collected in chambers,Arresting material in chamber creates severe unhygienic condition in the surrounding area and it should be clean, this item includes as follows 1 Cleaning the grease trap plastic container, 2 Cleaning of Brick Masonary chamber, 3 Applying Bleaching powder as directed by EIC. 4 Flushing whole system as directed by EIC. 5 Dispose waste material about 3 KM insie Anushaktinagar site as decided by EIC.

Flushing of sewer line 160/250/300mm (3nos) Flushing of sewer line 160/250/300mm nom.dia.(OD) and having 500 Mtr. Length or more located at 1)from sector market to Dilwara bldg. 2) Tapti biogas plant to Meerabai at Anushaktinagar. Above said work includes 1) Filling of Sintex tanks (5000 Ltrs.*2 Nos.) water supplied by department. 2) Operation of valves from Sintex tank for flushing inspection chamber, provided in existing system for flushing. 3) Removing of floating and settled materials, oil and grease, from surrounding which are produce during flushing. 4) In case of overflowing of chambers during flushing , contractor should doing necessary arrangements for smooth flow , and removing water comes during flushing on ground. 5) If the flushing is not doing as per requirements and as directed by EIC, item should not be paid and half item will not be considered in anyhow. The requirements as follows, Generates flow velocity of 0.422 m/s for average flow condition and 0.624 m/s for peak flow condition. For chock free working of sewer pipe a flushing arrangement generating flow of about 0.724 m3/min (which is half flow depth condition is required about

Cleaning of manholes by Cleaning Machines:- Cleaning of functioning/non-functioning of sewers of any size and shape upto any depth by Compact Pipe Sewer line Cleaning Machines which shall be a combined version of suction and jetting systems with Filtration (for Jetting) Facility mounted on vehicular chassis. It shall be used to flush the sewer lines and de-silt the manholes/chambers on the sewer lines. The heavily silted sewer lines shall be cleaned with the help of high pressure water jets produced by the jetting system and the silt accumulated in the manholes including plastic bags, polythene bags, wood, stones, etc. up to 50mm size from a depth of 5 meters shall be sucked by the suction system. The machine as a whole shall be capable to suck the silt from manhole, utilize the liquid storm water sucked from the manholes for jetting purpose after proper filtration. The overall noise level shall not be more than 91 db (A) as per the Noise Standards notified in Environment (Protection) Rule 1986 as amended on 19thMay 1993. etc. complete as per the specifications and as directed by EIC

Cleaning of Sewerage tanks (biogas) / Septic tanks by Cleaning Machines:- Cleaning of Sewerage tanks(biogas)/septic tanks: - Removal of wet/dry sewage slurry from septic tanks & disposal the same through BMC approved sewage tankers. Sewage tankers must be approved and register by BMC, CERTIFICATE should be submitted and approved by competent authority. After removing sewage from tank, clean the tank manually using portable water available for washing tank using Jet spray and de-watering the water from septic tank. Sewage should not dispose inside colony. As per direction and instruction of Engineer-In-Charge

RAJ ENTERPRISES (BID ID -3086726)

L . D . ENTERPRISES (BID ID -3086981)

RESHMA CONSTRUCTION (BID ID -3083304)

R K Construction (BID ID -3085417)

BALAJI ENTERPRISES (BID ID -3085462)

RAJ ENTERPRISES (BID ID -3086726)

L . D . ENTERPRISES (BID ID -3086981)

RESHMA CONSTRUCTION (BID ID -3083304)

R K Construction (BID ID -3085417)

BALAJI ENTERPRISES (BID ID -3085462)