88400E8 PROVN OF BOREWELL FOR JCOs OR MD ACCN AT KMRE AND SOL UNDER GE CHENNAI.

Amount

BOQ UPLOADED ON 16 MAR 2021.

SCH "A" PART-I (DRILL BOREWELL AND ALLIED WORKS)

Excavating in trenches, not exceeding 1.5m wide and not exceeding 1.5m in depth; for foundation, etc. or for shafts, wells, cesspits, manholes, pier holes, etc not exceeding 10 sqm on plan and not exceeding 1.5m depth and getting out in any type of soil all as specified and as directed.

Excavating in trenches, not exceeding 1.5m wide and not exceeding 1.5m in depth; for foundation, etc. or for shafts, wells, cesspits, manholes, pier holes, etc not exceeding 10 sqm on plan and not exceeding 1.5m depth and getting out in hard standing / cutting across roads all as specified and as directed.

Returning, filling in, including spreading, levelling, watering and well ramming in layers not exceeding 25 cm in any type of soil complete all as specified and as directed.

Dry river sand laid to required width of trench at bottom and top for cable cushioning all as specified and as directed.

Punned thickness only shall be measured.

Removing excavated surplus soil to a distance not exceeding 50m and depositing where directed at a level not exceeding 1.5m above the starting point complete all as specified and as directed.

Burnt bricks sub class "B" of old size, designation 50, laid dry in trenches with width equal to length of bricks across the cable for cable protection all as specified and as directed.

Plain cement concrete 1:3:6, type C2 using 40mm graded stone aggregate as in concrete for foundation / making good hard standing / cutting across roads to match with the adjacent surface complete all as specified and as directed.

Plain cement concrete 1:2:4, type B1 using 20mm graded stone aggregate as in sanitary sealing placed upto 5m below ground level complete all as specified and as directed.

Plain cement concrete, type C1, 1:3:6, using 20mm graded granite stone aggregate as in coping including weathering, slightly rounded or chamfered angles, including necessary formwork complete all as specified and as directed.

Mild steel as in small articles such as bands, straps, clamps, hold fast and like conforming to Fe-290 Grade-E-165,mild steel surface duly prepared and coated with two coats of synthetic enamel paint over a coat of red oxide zinc chrome primer, complete all as specified and as directed.

XLPE insulated, armoured, heavy duty electric cable with aluminium conductor, 1100 volts grade, of size 25 sqmm, 3.5 core, PVC sheathed, as per IS-7098 (Part-I) latest edition, in trenches / drawn through pipe / fixed on walls / bare in road crossings / paths / drains / ducts / floors / fixed on poles /walls with mild steel flat iron clamps / equipments including accessories like brass cable glands double compression type, lugs, nuts, bolts, washers etc., complete all as specified and as directed.

Earthwork, sand cushioning, protection for cable etc., as required shall be measured and paid separately.

Earthing complete with galvanised iron earth plate electrode 600mm X 600mm X minimum 6mm thick, with and including earthing of 25mm x 4mm GI strip protected by 40mm dia GI pipe light grade upto a length of 7.5m. The plate shall be buried directly in ground vertically to a depth not less than 2.25 metres below ground level with top edge of the earth plate at a depth not less than 1.5 metres below ground level, connected to earth lead as described here-in-before by means of bolts, nuts, washers and checknuts made out of galvanised iron or mild steel, earthing lead protected by as described here-in-before and connected to main switch board or main control board or electric pole all as shown on electrical plate No.3 of MES Sch Part-I including necessary earth work and excavation in any type of soil, plain cement concrete 1:3:6, type C1 chamber, reinforced cement concrete cover slab with locking arrangement and handle of 10mm dia MS round bars 450mm long, 1:2:4 type B1, 50mm thick with 8mm dia TMT bars at 140mm centre to centre both ways, GI pipe of bore 20mm medium grade for watering with funnel, wiremesh, salt, charcoal, lugs including testing complete all as specified and as directed.

Steel tubing, galvanised, light grade, with all fittings such as flanges, unions, caps, bends, elbows, tees etc., and laid in trenches etc., of bore of pipe 50mm for cable protection complete all as specified and as directed.

Earthwork as required shall be measured and paid separately.

Steel tubing, galvanised, medium grade, with all fittings such as flanges, unions, caps, bends, elbows, tees etc., and laid in trenches / floors / under roads / crossings etc., of bore of pipe 80mm complete all as specified and as directed.

Earthwork as required shall be measured and paid separately.

Steel tubing, galvanised, medium grade, with all fittings such as flanges, unions, caps, bends, elbows, tees etc., and fixed complete to ceiling / walls / poles etc., of bore of pipe 80mm complete all as specified and as directed.

Cast iron non return valve with bypass arrangement heavy duty, suitable for 80mm bore of pipe, Class PN 1.6 (conforming to IS 5312, Part-I with cast iron hand wheel complete all as specified and as directed.

Cast iron sluice valve suitable for 80mm bore of pipe with flanged ends Class PN 1.6 (conforming to IS 14846 with brass spindle, leather gasket of suitable thickness, suitable nut, bolts and washers complete all as specified and as directed.

Cutting and screwing existing steel tubing in position without taking down for addition / alteration of 50mm to 80mm bore of pipe, tapping out connection including necessary tees and fittings and fixing with flanges on both sides of the pipes for fixing of sluice valve suitable upto 80mm bore of pipe complete all as specified and as directed.

Earthwork as required shall be measured and paid separately.

Cutting and screwing existing steel tubing in position without taking down for addition / alteration of 50mm to 80mm bore of pipe, tapping out connection including necessary tees and fittings complete all as specified and as directed.

Earthwork as required shall be measured and paid separately.

Construction of valve chamber of inner dimensions 600mm x 600mm x 600mm suitable for sluice valves upto 100mm size, with earthwork in any type of soil, PCC foundation 100mm thick of 1:4:8, type D2, using 40mm graded stone aggregate, brickwork with fly ash bricks in CM 1:6, 230mm thick, PCC coping 50mm thick of 1:2:4, type B1, using 20mm graded stone aggregate, rendering on both fair and other than fair face of brickwork in CM 1:4, finished fair and even, finished with three coats of whitewash after preparing surfaces, Mild steel cover of size 800mm x 800mm of steel sheet of 3.15mm, on framework of angle iron 50mm x 50mm x 6mm with locking arrangement painted with two coats of synthetic enamel paint over a coat of red oxide primer complete all as specified and as directed.

Drilling trial bore well vertically by using high speed reverse rotary fast rig machinery or any other approved method of size 250mm dia through any type of soil / rock strata such as hard / dense soil, soft / loose soil, sandy clay, red clay, moorum , weathered rock, hard rock, slightly fracturered rock, pebbeled rock or any other geologoical formation at given location by ground water survey experts all as per IS-2800 for a depth not exceeding 200m below ground level complete all as specified and as directed.

(a) The quantity is for two locations in each area i.e in KMRE and SOL area.

(b) The quantities of the items shall vary based on the success of the borewell in a particular location. Please refer Special Condition on tubing here-in-after.

Developing / drilling / reaming of bore well drilled under BOQ Sl Item No.23 here-in-before for enlargement of dia of bore hole of 250mm dia to 350mm dia vertically by using high speed reverse rotary fast rig machinery or any other approved method through any type of soil / rock strata such as hard / dense soil, soft / loose soil, sandy clay, red clay, moorum , weathered rock, hard rock, slightly fracturered rock, pebbeled rock or any other geologoical formation at given location by ground water survey experts all as per IS-2800 for a depth not exceeding 200m below ground level complete all as specified and as directed.

Notes for BOQ Item No.23.00 and 24.00:-

(a) The No of borewells to be dug are 01 No each in KMRE and SOL area.

(b) The unit rate quoted is deemed to include for collection of soil samples and strata, removal of mud and slurry from the site, hire charges of rig, Tools & Plants, machinery, fuel charges, labour, consumables, transportation. drilling and operation including use and waste of all necessary appliances and materials in complete all respects to entire satisfaction of Engineer-in-Charge.

(c) GE shall ensure that the work is carried our as per the recommendation of CGWB in respect of location and depth before commencement of work.

(d) ERW / MS pipe, MS cap and PCC as required shall be measured and paid separately.

(e) The hydrogeological investigation by CGWB is available in the office of GE Chennai. The tenderer shall refer the same before quoting for the items.

Developing and flushing the bore wells with high pressure compressed air and thereafter by pumping muddy water with 25% extra capacity pump till till clear water flows out complete all as specified and as directed.

Notes

The No of borewells to be dug are 01 No each in KMRE and SOL area.

Developing period shall be a minimum of 24 hours per borewell of till clear water flows whichever is later.

Supplying, lowering and fixing of PVC casing pipes into bore holes, PVC plain pipe of dia 250mm, heavy duty, 6 kg / sqcm pressure rating, ISI marked in lengths of 3m to 6m, complete including jointing of casing pipe with adhesive material and galvanised screws to secure the pipes firmly in position conforming to IS specifications including all tools and plant and equipment required complete all as specified and as directed.

Supplying, lowering and fixing of PVC casing pipes into bore holes, PVC ribbed, screen slotted type pipe of dia 250mm, heavy duty, 6 kg / sqcm pressure rating, ISI marked in lengths of 3m to 6m, complete including jointing of casing pipe with adhesive material and galvanised screws to secure the pipes firmly in position conforming to IS specifications including all tools and plant and equipment required complete all as specified and as directed.

Supplying and lowering into the PVC casing of borewell, column pipe of galvanised steel water tubing, 50mm bore of pipe, heavy duty, flanged type, ISI marked, including nuts and bolts with washers, gaskets in lengths of not more than 3m to connect from submersible pump top / ground level of borewell complete all as specified and as directed.

Gravel packing of suitable grade in the annular space between PVC casing pipe and true bore hole, fine aquifers, complete all as specified and as directed.

Electro logging test for water bearing zone identification including all tools and equipment complete all as specified and as directed.

Verticality test to test the verticality of the borewell all as per IS-2800 (latest edition) complete all as specified and as directed.

Yield test of borewell (V-notch type) continuously for 08 hours in the presence of departmental representative nominated by Accepting Officer and submitting the test report including all equipment and consumables etc., complete all as specified and as directed.

Getting of water samples of bore wells tested (chemical and bacteriological analysis) by Govt recognised testing laboratories/institutes including collection of samples from various bore wells in clean sterlised bottles, transportation and collection and submission of report in triplicate complete all as specified and as directed.

Well cap top cover made out of 6mm thick mild steel sheet suitable for casing pipe of borewell in two half sections duly hinged with locking and fixing arrangement, nuts and bolt with accessibility of pump delivery pipe, steel surface duly prepared and coated with two coats of epoxy paint over a coat of epoxy primer complete all as specified and as directed.

Lifting / housing clamp for housing pipe, set of two, with mildsteel of section 100mm x 20mm, 900mm long each bent to shape, held together with suitable bolts and nuts, mild steel surface duly prepared and coated with two coats of synthetic enamel paint over a coat of red oxide zinc chrome primer, for holding GI pipe complete all as specified and as directed.

Air pressure gauge suitable for GI pipe 50mm to 80mm bore of pipes including checknuts and making holes / arrangement for proper insertion complete all as specified and as directed.

Bail plug 1.5m long of mild steel made with socket with bottom plate 12 mm thick and rod 20 mm dia welded as hook, mild steel surface duly prepared and coated with two coats of synthetic enamel paint over a coat of red oxide zinc chrome primer, complete all as specified and as directed.

Submission of sample strata box and bore chart complete all as specified and as directed.

Supplying, lowering, testing and commissioning of submersible pump set, vertical type, multistage with stainless steel impellers duly coupled to submersible electric driven motor, 3 phase, 415 Volts, 7.5 HP, including provision of non return valve both ends screwed of size 50mm dia fixed to 50mm bore of pipe including connecting to 3 core copper conductor cable (water proof) of size 6 sqmm, 1100 V grade complete all as specified and as directed.

Notes :-

(a) The submersible pump shall be designed based on the yield and head obtained in the tubewell.

(b) Particular model of pumpset with number of stagings, head and discharge of capacity 7.5 HP shall be approved by GE based on head and discharge characteristic curve as per manufacturers manual after satisfactory yield obtained in the tubewell.

(c) Control panel for motor, submersible cable, GI column tubing shall be measured and paid separately.

(d) Two Nos steel wire ropes of not less than 6mm dia shall be supplied along with the each pumpset as directed by Engineer-in-Charge, the cost of which is deemed to be included in the unit rate quoted.

Flat PVC Insulated and PVC sheathed industrial submersible water proof cable for submersible pump motors 1100 volts grade, 3 core, cross sectional area 6 sqmm connected with necessary ferrules / water proof joint complete all as specified and as directed.

MCCB DB FP, double door, powder coated, 415 volts, AC, 50Hz, IP 54 protected, fixed with and including MCCB FP, 32 Amps, 415 V, 25 kA - 01 No with tinned copper bus bar, neutral link, earth link and connecting up complete all as specified and as directed.

Supply, installation, testing and commissioning of water meter, magnetically coupled, double jet, flange type, of size 50mm dia complete all as specified and as directed.

Design, fabrication, supply, installation, testing and commissioning of LT control panel, outdoor type, made up of CRCA sheet 3mm thick of minimum size 1000mm x 1000mm x 450mm to accommodate the accessories as detailed below with hinged doors, with locking arrangement, weather, dust and vermin proof, epoxy powder coated, to minimum IP-54 protection class of IS-2147, pedestal mounted, LT 415 volts, 3 Phase, 4 wire, 50 cycles, including cable galleries, interconnecting bus-bar connection / linkage, suitable for housing and including provision of the following switch gears including all pre-wiring with PVC copper conductor cable of suitable size, nuts, bolts and washers and in accordance with IS-13947 (Part-I) 1993 & IS-8623 and all as specified and directed by Engineer-in-Charge.

(a) Copper bar with rating 100 Amps for 3 phase and neutral with heat shrinkable PVC coloured sleeves and copper earth bus of size 25mm x 3mm mounted on suitable insulators with terminal switch - 01 Set

(b) MCCB 40 Amps, 4 pole, 415 Volts, 50 Hz, 25 kA with fixed thermal and fixed magnetic setting - 01 No.

(c) MCB 32 Amps, TPN pole, 415 Volts, 50 Hz, 16 kA - 02 Nos.

(f) Star Delta Starter suitable for 7.5 HP motor - 01 No

(g) Single phase preventer with reverse phase protection, 415 Volt, 3 Phase, 50 Hz of rating 10 Amps - 01 No

(h) LED type pilot indicator lamps RYB phases with backup fuse, Set of three - 01 No.

(j) Power capacitor 5 kVAR - 01 No.

(k) The LT panel board shall be kept 450mm above ground level, mounted by means of suitable bolts and nuts grouted into platform of PCC 1:2:4, type B1, using 20mm graded stone aggregate, over PCC foundation of 100mm thickness in PCC 1:4:8, type D2 using 40mm graded stone aggregate, the exposed concrete surfaces shall be rendered in CM 1:4, 10mm thick, finished fair and even and applied white wash three coats.

S S BUILDERS

M/s Omm Muruga Enterprises