SPECIAL REPAIRS FOR RENEWAL OF BOREWELL AT BORE WELL NO 09 and 13 FOR UNIT AREA AT MIL STN BHUJ

Amount

Excavation in trenches not exc 1.5m wide and not exc1.5 m depth for taking out of old pipeline all as specified and as directed in hard/dense soil.

Returning filling in including spreading, levelling, watering and well ramming in ramming in layer n.exc 25cm thick in hard/dense soil

Removing excavated soil to a distance n.exc 50 mtr and depositing where directed at a level n.exc 1.5 m above the starting point.

Cutting the water supply mains up to 150 mm dia for insertion of reduced Tees of 150 mm x 100 mm dia including earth work complete all as directed by Engr-in-charge. Note. Cast iron specials required at site will be measured and paid seperately under relevant items.

Supply and fixing 100 mm dia (inner bore size) UPVC water supply pipes manufactured as per ASTM-1785 both ends threaded as per IS-559, Sch-40 complete with all fittings and accessories, laid in trenches in required length complete all as specified and directed by engineer-in-charge. Make : Supreme/Finolex/Kisan

Supply and fixing 100 mm dia (inner bore size) UPVC ball valves wih operating handle manufactured as per both ends threaded as per IS-559, Sch-40 complete suitable for ASTM-1785, Sch-40 UPVC pipes complete all as specified and directed by engineer-in-charge. Make : Supreme/Finolex/Kisan

M&L for construction of new PCC solid mansonary valve chamber of size 1000 x 1000 x 1000 mm (internal dimensions) with PCC foundation 1:4:8 type D2 using 40 mm graded stone aggregate 150 mm thick 150 mm wide off sets alround over 100 mm thick hard core, 200 mm thick PCC solid walls built in CM 1:6, 50 mm thick PCC 1:2:4 type B1 coping finished even and smooth, rendering 10 mm thick in cement mortor (1:6) finished even and smooth, with out using etra cementinternally including top of floor including excavation earth work in hard/dense soil 3 mm thick MS sheet cover fixed on 25 mm x 25 mm x 6 mm thick angle iron frame with hold fasts embedded in PCC coaping with locking arrangment, mild steel handle and painting to steel surfaces with two coats of synthetic enamel paint over one coat of primer including disposal of surplus soil to a distance not exceeding 50 m etc complete all as specified and directed.

M&L, Drilling vertically from average ground level for 300mm dia pilot bore hole in any type of strata by mud flash rotary rig and including cost of bentonite powder. Drilling shall be done by mud flash rotating equipment and bore shall be unsealed at least for 72 hours to the entire depth of bore holes, depth of bore hole from 0 to 15 Mtr depth including sub soil complete all as specified and directed.

M&L, Drilling vertically from average ground level for 300 mm dia pilot bore hole in any type of stratal by mud flash rotary rig including cost of bentonite powder. Drilling shall be done by mud flash rotating equipment and bore shall be unsealed at least for 72 hours to the entire depth of bore holes, depth of bore hole from 0 to 15 meters depth including sub soil complete all as specified and as directed with the following items :-

(a) Depth of bore holes from 15 m to 50 m depth.

(b) Depth of bore holes exceeding 50 m but not exceeding 100m

(c) Depth of bore holes exceeding 100 m but not exceeding 225 m

Note for Serial No 8 & 9:- (i) The pilot bore wells shall be drilled on tentative location as approved by GE. Tentative location which shall be obtained from Geographical department of GWS&SB by the contractor. (ii) If the yield is insufficient as considered by GE then pilot bore shall be drilled at new place as directed by GE. Payment shall however be made only for drilling as per actual. (iii) Rig, tolls and plants etc required for completion of work and their cartage. (iv) Collection of soil Strata at every 3m depth or chane in strata met with during the bore shall be plotted against the depth on a tracing paper in the form of strata chart and blue print in sextuplicate shall be submitted to deptt for record. (v) Actual depth of final bore shall be decided based on the result of electro logging and TDS report. (vi) Soil/strata testing report shall be done through Geo hydrology department for water aquifier details of the location if required and submitted to the Engr incharge.

M&L, Electro logging test of the pilot bore hole by using logger equipment including all necessary arrangements for chemical analysis, bactriological test of sample of yield obtained from pilot bore to ascertain potability of water all as specified and directed. Note. The contractor shall submit electrologging result with recommended bore assembly details n duplicate for approval of GE.

M&L, drilling (Reaming) pilot hole 300mm dia in any type of soil/alluvial strata by rotary rig direct mud circulation method by using bentonite clay in prepared circulating mud to prevent caving in of borewell and developing bore into a full fledged bore hole of 600 mm dia including all equipment tools and plants shall be privided for completion of job at this own cost for a depth of 0 to 15 m including sub soil complete all as specified and directed.

All as per item No. 10 above but in sand/stone strata including clay packing for 300 mm dia to 600 mm dia bore hole from 15 m to 80 m depth.

All as per item No. 10 here-in-before but in sand/stone strata including clay packing for 300 mm dia to 600 mm dia bore hole from 80m to 225 m depth.

Development and testing for yield including all necessary aggrangments for testing and developing, including lowering and removing of 100 mm dia drop line and 32 mm dia air line for development of each water bearing zone come across upto the full depth of deep bore well of size 300 mm dia for complete period of development of bore, air compressor 600 CFM/150 PSI running for 06 hrs or till sand free discharge obtained which ever is later etc all as specified and directed.

Supplying lowering, jointing, connecting and fixing following sizes of RCC casing pipes into bore hole including providing suitable size of boe plug, RCC pipe clamp, Nut bolts, bottom lowering plate, column pipe clamp, borewell cover made up of MS sheet 3mm thick, split type and both side locking arrangmenent and making 3"/4" hole for insertion of column pipe in centre of the bore well including welding works and cover shall be suitable for 300 mm dia RCC bore well etc complete all as specified and directed. Note. The asssembly of casing pipes shall be lowered as per electrogging test report and recommended assembly details.

(a) 300 dia RCC blank pipe 25 mm thick

(b) 300 mm dia x 25 mm thick RCC strainer pipes with 75 Nos of 5mm size holes per meter length.

M&L for sanitary sealing of tube well with PCC (1:2:4) type B1 using 20mm graded stone aggregate upto a depth of 1 mtr from ground level and 0.45 mtr above grond level (Square type of ext dimensions 600 mm x 600 mm) around tube well casing, plat form of ext dimensions 1200 x 1200 x 150 mm at ground level with PCC 1:4:8 type D2 foundation using 40mm stone aggregate including necessary form work and supply and placing of 80 mm bore light grade, GI pipe, at two places each 1.5 m in length for pouring of peagravel (in future) and capping with screwed cap at top side end etc complete all as specified and directed.

M&L for strata sample (at every 3 meters depth) one set in suitable box pattern, earth sample strata should be produced as per IS and submitted to the department. The box shall be 2nd class hard wood with suitable locking arrangment etc complete all as specified and directed.

M&L for borewell chart on acrylic sheet of size 60cm x 15 cm duly marked permanent marking including 12mm thick plywood frame, clamps for fixing on wall etc all as specified and directed

Supply and fix HDPE (High density polythene) pipe, PE-63 grade, ISI marked, as per IS 4984, PN 10, size 3 inch, Outer dia 90 mm, 10 Kg/cm2, suitable for borewells including providing SS nipples (03 Nos) of suitable size flanged type complete all as specified and directed. Make : GENEX or equivalent.

S&F polypropelene rope 28 mm dia, ISI marked, heavy duty grade, Make: GARWARE or equivalent.

M&L MS cage of suitable size for submersible pump set fabricating out of MS flat 40 x 10 mm, 4 Nos vertical and 4 Nos horizontal supports as in frame work to hold the submersible pump set alongwith column pipes safely including applying of two coats of synthetic enamel paint over priming coat of red xoide after preparation of new steel surfaces etc complete all as directed.

Supply and fix PVC insulated sheathed multi stranded copper conductor cable for submersible pump set, ISI marked, conforming to IS864 of size 3 core 16 Sqmm, 1100 volts grade, including necessary water proof connection to submersible pump at cable lead complete all as specified and directed. Make: Finolex, Gloster, Havells

Supply install, testing and commissioning multi stage SS submersible pump, with S.S Bowl and connected with 100 mm dia column pipe by means of S.S flange and connecting SS Nipple and 16 Sqmm copper conductor submersible cale having dilfuser casing construction and impellers dynamically balanced rotor and pump shaft with impeller with outlet size 80mm and motor 40 HP suitable for operation on 3 phase 415 volts, complete set having peak point at 120 to 150 mtr, discharge range 1250 to 1000 LPM including disc suction strainer cable guard etc. including lowering into borewell etc comlete all as specified and directed. Make : DUKE Cat No DSP 8 MFM 40, or equivalent model in Crompton Greaves.

Supply and fixing, connecting and testing of PP Non return valve flanged type (ASA 150 & F) complete as locking device with bolts, nuts, rubber gaskets etc including jointing materials of size 90 mm OD, complete all as specified and directed.

Supply and fixing of PVC air valve 25 mm dia bore with required length of PVC pipes, clamps etc complete all as specified and directed.

S&F of pressure guage 0 to 10 Kg/cm square range with necessary siphon and 15 mm dia stop valve including 15mm dia GI Pipe, not exceeding 0.25 mtr in length, 15 mm brass bib cock on rising main including drilling tapping on GI/CI pipe line complete all as specified and directed.

M&L for hydrological investigation of the area to suggest the location of the proposed borewell.

Material and Labour for earthing complete with galvanised steel earth plate electrode 600mm x 600mm x 6mm buried directly in ground vertically to a depth not less than 2.25 meter below normal ground level (with top edge of earth plate not less than 1.5 meter below ground level) connected to GI strip 25 mm x 3 mm main earthing lead by means of galvanised bolts, nuts and washers all as shown in electrical plate no 5 of MES Schedule Part I (1991) with connected to earth test point & no main switch board etc with & including adequate quantity of charcoal dust and common salt all around earth plate, test point of phosphorous bronze/ gun metal of size 75 mm x 75 mm x 25 mm, PCC (1:3:6) type C1 (using 20 mm graded black trap/granite/Basalt stone aggregate) for earth pit with 40 x 40 x 6 mm mild steel angle iron frame for cover, pre cast RCC (1:2:4) type B1 using 20 mm graded black trap/granite/Basalt stone aggregate) 40 mm thick cover reinforced with 8mm dia TMT bars 3 Nos both way with 12 mm dia round bar handle, GI medium grade watering pipe 20 mm dia with funnel and wire mesh, and 40 mm dia GI medium grade earth lead protection pipe, complete all as specified and directed. Note. Earth strip and its protection pipe upto and including 7.5 mtr only from the top of earth electrode are included under this item and additional earth strip/protection pipe etc. if any required at site shall be measured and paid for separately under appropriate item of Schedule 'A'

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MUKUL ENGINEERING

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