M/o DDA Office complex Sector-3, Rohini.

Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - All work up to plinth level : 1:2:4 (1 cement : 2 coarse sand (zone-lll) derived from natural sources : 4 graded stone aggregate 20 mm nominal size derived from natural sources)

Centering and shuttering including strutting, propping etc. and removal of form work for : Foundations, footings, bases for columns.

Steel work welded in built up sections/ framed work, including cutting, hoisting, fixing in position and applying a priming coat of approved steel primer using structural steel etc. as required,complete as per direction of Engineer-in-charge. (a)In gratings, frames, guard bar, ladder, railings, brackets, gates and similar works.

Painting with synthetic enamel paint of approved brand and manufacture to give an even shade : Two or more coats on new work on new work over an under coat of suitable shade with ordinary paint of approved brand and manufacture.

Boring/drilling bore well of required dia for casing/ strainer pipe, by suitable method prescribed in IS: 2800 (part I), including collecting samples from different strata, preparing and submitting strata chart/ bore log, including hire & running charges of all equipments, tools, plants & machineries required for the job, all complete as per direction of Engineer-in-charge, upto 90 metre depth below ground level . All types of soil, 300 mm dia

Boring/drilling bore well of required dia for casing/ strainer pipe, by suitable method prescribed in IS: 2800 (part I), including collecting samples from different strata, preparing and submitting strata chart/ bore log, including hire & running charges of all equipments, tools, plants & machineries required for the job, all complete as per direction of Engineer-in-charge. (a) upto 90 metre depth below ground level Rocky strata including Boulders 300 mm dia

Gravel packing in tubewell construction in accordance with IS: 4097, including providing gravel fine/ medium/ coarse, in required grading & sizes as per actual requirement, all complete as per direction of Engineer-in-charge.

Supplying, assembling, lowering and fixing in vertical position in bore well, ERW (Electric Resistance Welded) FE 410 mild steel screwed and socketed/plain ended casing pipes ofrequired dia, conforming to IS: 4270, of reputed & approved make, including painted withoutside surface with two coats of anticorrosive paint of approved brand and manufacture, including required hire & labour charges, fittings & accessories, all complete, for all depths, as per direction of Engineer-in-charge. (a)150 mm nominal size dia having minimum wall thickness 5.00 mm

Supplying, assembling, lowering and fixing in vertical position in bore well, ERW (Electric Resistance Welded) FE 410 plain slotted (having slot of size 1.6/3.2 mm) mild steel threaded and socketed/ plain bevel ended pipe (type A) of required dia, conforming to IS: 8110, of reputed and approved make, having wall thickness not less than 5.40 mm, including painted with outside surface with two coats of anticorrosive bitumestic paint of approved brand and manufacture, including hire & labour charges, fittings & accessories, all complete, for all depths, as per direction of Engineer -in-charge. 150 mm nominal size dia

Providing and fixing suitable size threaded mild steel cap or spot welded plate to the top of bore well housing/ casing pipe, removable as per requirement, all complete for borewell of: 150 mm dia

Providing and fixing M.S. clamp of required dia to the top of casing/ housing pipe of tubewell as per IS: 2800 (part I), including necessary bolts & nuts of required size all complete as per direction of Engineer-in-charge. (a)150 mm clamp

Taking out existing CC interlocking paver blocks from footpath/ central verge, including removal of rubbish etc., disposal of unserviceable material to the dumping ground, for which payment shall be made separately and stacking of serviceable material within 50 metre lead as per direction of Engineer-in-Charge.

Laying old cement cocrete interlocking paver blocks of any design/ shape laid in required line, level, curvature, colour and pattern over and including 50 mm thick compacted bed of coarse sand, filling the joints with fine sand etc. all complete as per the direction of Engineerin- charge. (Old CC paver blocks shall be supplied by the department free of cost).

Providing and laying factory made chamfered edge Cement Concrete paver blocks in footpath, parks, lawns, drive ways or light traffic parking etc, of required strength, thickness & size/ shape, made by table vibratory method using PU mould, laid in required colour & pattern over 50mm thick compacted bed of sand, compacting and proper embedding/laying of inter locking paver blocks into the sand bedding layer through vibratory compaction by using plate vibrator, filling the joints with sand and cutting of paver blocks as per required size and pattern, finishing and sweeping extra sand. complete all as per direction of Engineer-in-Charge. (a) 80 mm thick C.C. paver block of M-30 grade with approved color design and pattern.

Demolishing cement concrete manually/ by mechanical means including disposal of material within 50 metres lead as per direction of Engineer - in - charge.Nominal concrete 1:3:6 or richer mix (i/c equivalent design mix)

Providing and fixing 45 mm SS padlocks with 3 keys used to protect box.

Providing & installation of DWLR (Telemetric type) Battery operated Make: KDES (and similar) Descriptions; Online Ground water level recorder Continuous Data Logging facility. Imported pressure transducer (sensor) with capability of measuring till 50 meter’s depth. Factory – calibrated sensor. Facility for wall / pipe enclosure. Durable and rugged design. Specifications : Accuracy : 0.25 % F.S. Compensated temp. : -20C to +85 C Operating temp. : -40C to +125C Current consumption : 5mA Wetted material steel : 17-4PH or 316L Stainless port, 316L stainless steel snubber Vibration : +20g, MIL-STD-810C Dielectric strength : 2mA @500VAC, 1min, Display : 16x2 LCD display Enclosure : IP65 Data Output : Microsoft Excel format. Clock : Real time internal clock Power : Battery operated Battery life : Two years, all complete as per direction of Engineer-in-charge. Data Monitoring Service: Telemetry web data monitoring for water table for each system. Providing and fixing of Cable for DWLR system (total depth around 50 meter each) Specification Core : 2 core Type : Round Conductor Material : Copper (Preferred make: Polycab, Havells, Anchor etc.) Cable Size: 1mm sealed, all complete as per direction of Engineer-in-charge.

Providing and installation of separator for RWH to flush out first rainfall discharge to nearby SW drain including but not limited to, providing necessary equipment, tools, machinery & material required for job, all complete as directed by the Engineer-in-charge.

Comprehensive operation and maintenance of, the installed DWLR system, inclusive of all associated mechanical, electrical, electronic, and telemetric components, ensuring uninterrupted functionality, seamless data transfer, and overall performance of the equipment for a continuous period of five (05) years post-installation, including periodic servicing, replacement of defective parts, calibration, software support, and ensuring compliance with performance benchmarks as per the directions of the Engineer-in-Charge

Providing and laying non-pressure NP2 class (light duty) R.C.C. pipes with collars jointed with stiff mixture of cement mortar in the proportion of 1:2 (1 cement : 2 fine sand) including testing of joints etc. complete : 150 mm dia. R.C.C. pipe

Earth work in excavation by mechanical means (Hydraulic excavator)/ manual means over areas (exceeding 30 cm in depth, 1.5 m in width as well as 10 sqm on plan) including getting out and disposal of excavated earth lead upto 50 m and for all lift, as directed by Engineer-in-charge.

Demolishing cement concrete manually/ by mechanical means including disposal of material within 50 metres lead as per direction of Engineer - in - charge. Nominal concrete 1:4:8 or leaner mix (including equivalent design mix

Providing and laying cement concrete 1:5:10 (1 cement : 5 coarse sand : 10 graded stone aggregate 40 mm nominal size) all-round S.W. pipes including bed concrete as per standard design : 150 mm diameter S.W. pipe

Pumping out water caused by springs, tidal or river seepage, broken water mains or drains and the like

Development of tube well in accordance with IS : 2800 (part I) and IS: 11189, to establish maximum rate of useable water yield without sand content (beyond permissible limit), with required capacity air compressor, running the compressor for required time till well is fully developed, measuring yield of well by “V” notch method or any other approved method, measuring static level & draw down etc. by step draw down method, collecting water samples & getting tested in approved laboratory, including disinfection of tubewell, all complete, including hire & labour charges of air compressor, tools & accessories etc., all as per requirement and direction of Engineer-in-charge.

GST factor @0.973 except on item no 17, 18 & 19 =413005.32

Cost Index @ 3% except on item no 17, 18 & 19 Note : Provision of additional Performance Guarantee/Performance Security in case of Abnormally Low Bids (ALB) submitted by bidders as per circular 02/2025 issued by CE(HQ & QAC) (refer at P-159).

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