Drilling, Lowering of Assembly,Development of Tubewells at TWIS Teuri Upper,STW Samoor Kalan,TWIS Teuri Doyam at Una under HPCDP (P-II)-JICA-ODA

Earth work in excavation by mechanical means (Hydraulic excavator) / manual means in foundation, trenches or drains, pits upto all depths in all classification of earth work such as pick work, jumper work, saturated soil including bailing and pumping out water, chieselling soft / hard rock including dressing of sides and ramming of bottoms, including getting out the excavated soil and disposal of surplus excavated soil as directed, within all leads and lifts complete in all respect and to the entire satisfaction of the Engineer-in-Charge.

Providing and laying in position cement concrete 1:4:8 (1 Cement: 4 coarse sand : 8 graded stone aggregate 40 mm nominal size) and curing complete excluding the cost of centering and shuttering complete in all respect within all leads and lifts and to the entire satisfaction of the Engineer-in-Charge.

Brick work with common burnt clay F.P.S. (non modular) bricks of class designation 7.5 in foundation & plinth in all shapes and sizes Cement mortar 1:6 (1 cement : 6 coarse sand) complete in all respect within all leads and lifts and to the entire satisfaction of the Engineer-in-Charge.

15 mm cement plaster on the rough side of brick wall in cement mortar 1:4 (1 cement: 4 Coarse sand) complete in all respect within all leads and lifts and to the entire satisfaction of the Engineer-in-Charge.

Transportation of Rig along with allied accessories etc. complete including errection and levelling at site, through all kinds of roads, approaches fields etc. in all leads and lifts completed in all respects as per the directions of Engineer - in-Charge.

Drilling of bore as per specification laid down in IS 2800-1991 (part-I) with upto date ammendments,if any,with percussion Rig /Direct Rotary Rig or combination drilling Rig. starting with 650-600 mm dia M.S pipe reduced to 450-400 mm dia M.S pipe confirming to IS 4270-2001 with up-to-date ammendements ,if any, in all kind of soils, boulders, rocks, collapsible strata, saturated soils,artesian conditions including the cost of all consumable, stores,water,fuel,lubricants and other accessories etc. complete in all respectsd as per the directions of the Engineer -in -Charge.

Drilling and lowering of M.S casing pipes confirming to IS 4270-2001 with up-to-date ammendments,if any, of suitable sizes as mentioned above,from 0-30 mtrs below ground level complete in all respectsd as per the directions of the Engineer -in -Charge.

Drilling and lowering of M.S casing pipes confirming to IS 4270-2001 with up-to-date ammendments,if any, of suitable sizes as mentioned above,from 30-60 mtrs below ground level complete in all respectsd as per the directions of the Engineer -in -Charge.

Drilling and lowering of M.S casing pipes confirming to IS 4270-2001 with up-to-date ammendments,if any, of suitable sizes as mentioned above,from 60-90 mtrs below ground level complete in all respectsd as per the directions of the Engineer -in -Charge.

Drilling and lowering of M.S casing pipes confirming to IS 4270-2001 with up-to-date ammendments,if any, of suitable sizes as mentioned above,from 90-140 mtrs below ground level within all leads and lifts.

Drilling and lowering of M.S casing pipes confirming to IS 4270-2001 with up-to-date ammendments,if any, of suitable sizes as mentioned above,from 140-160 mtrs below ground level within all leads and lifts.

Collection, preservaion and display of suitable size sample box with top lid and locking arrangement till handing over of the tube well to the department complete in all respects as per the directions of the Engineer -in -Charge.

Supply and lowering of IS marked Electric Resistance Welded M.S. pipe 300 mm dia nominal size housing, 7.1 mm thick having out side dia mtrs. 323.90 mm bevelled edge confirming to I.S. 4270-2001 with up-to date amendments, if any ,about 4 mtrs to 7 mtrs in length, welded without any circumferential joints, into bore hole in vertical position including cost of all scaffolding derricks, poles, clamps embedded in foundation etc. including cost of all cutting, threading and welding of pipes etc. within all leads and lifts,complete in all respects as per the directions of the Engineer -in-Charge.

Supplying and Lowering at site Electric Resistance Welded ( ERW) Stainless Steel Cage type "V" wire wound screens of size 300 mm , 7.1 mm thick with slot opening 1.0 mm,as per IS 8110-2000 with upto date ammendments,if any, and material specification as per AISI" American Iron and Steel Inst " Type Grade SS-304 in suitable lenghts as per site conditions, including the cost of SS socket 8mm thickness(supplied by the department ) of length 140 mm, confirming to AISI grade 304, suitable to accomodate screen and ring including jointing screen with blind pipes complete in all respects all scaffolding derricks, poles, clamps, embedding in foundation etc. including cost of all cutting, threading and welding of pipes etc. within all leads and lifts complete in all respects as per the directions of the Engineer - in - Charge. Screen will be of continuous trapezoidal wire spirally wound around fabricated cage. The wrapping wire having "V" shaped ( Wedge) profile wire with flat surface on the outside and producing expanding slots on the inside of various dimensions, resistance welded to a cylindrical body made of number of longitudinal special high tensile support rods to provides smooth unrestricted bore which are in turn welded into cylindrical ring couplings on both sides of screens within all leads & lifts complete in all respects as per the directions of the Engineer -in -Charge.

Providing and fixing M.S. taper / reducer as per lengths approved by Engineer -in-Charge ,the material of M.S taper/reducer shall be equivalent to parent pipe material and shall conform to chemical composition as per 4270-2001 with upto date ammendments ,if any, within all leads & lifts complete in all respects as per the directions of the Engineer -in -Charge.

Supply and lowering of IS marked Electric Resistance Welded M.S.pipe 200 mm nominal size housing, 6.40 mm thick having out side dia mtrs. 219.10 mm bevelled edge confirming to I.S. 4270-2001 with up-todate ammendments, if any ,about 4 mtrs to 7 mtrs in length, welded without any circumferential joints, into bore hole in vertical position including cost of all scaffolding derricks,poles,clamps embedded in foundation etc. including cost of all cutting,threading and welding of pipes etc. within all leads & lifts complete in all respects as per the directions of the Engineer -in -Charge.

Supply and lowering at site Electric Resistance Welded (ERW) Stainless Steel Cage type "V" wire wound screens of size 200 mm ,6.40 mm thick with slot opening 1.0 mm,as per IS 8110-2000 with upto date amendments,if any, and material specification as per AISI"American Iron and Steel Inst" Type Grade SS-304 in suitable lenghts as per site conditions, including the cost of SS socket 8 mm thickness ( supplied by the department) of length 140 mm, confirming to AISI grade 304, suitable to accomodate screen and ring including jointing screen with blind pipes complete in all respects all scaffolding derricks,poles, clamps, embedding in foundation etc. including cost of all cutting, threading and welding of pipes etc. within all leads and lifts complete in all respects as per the directions of the Engineer - in - Charge.Screen will be of continuous trapezoidal wire spirally wound around fabricated cage.The wrapping wire having "V" shaped (Wedge) profile wire with flat surface on the outside and producing expanding slots on the inside of various dimensions, resistance welded to a cylindrical body made of number of longitudinal special high tensile support rods to provides smooth unrestricted bore which are in turn welded into cylindrical ring couplings on both sides of screens within all leads & lifts complete in all respects as per the directions of the Engineer -in -Charge.

Providing and fixing M.S centralized guides at suitable spacing for each tube well as per IS 226-1991 with up-to-date amendments if any, within all leads and lifts ,1x4Nos. within all leads & lifts complete in all respects as per the directions of the Engineer -in -Charge.

Supplying ,lowering and fixing in position IS marked mild steel bail plug of 200 mm/ 300 mm diameters with "U" hooks as per IS 2800-1991 with up -to date amendements ,ifany, within all leads & lifts complete in all respects as per the directions of the Engineer -in -Charge.

Providing. and fixing in position threaded iron cap with locking arrangements of approved design to prevent foreign matter from getting into bore hole,as required, within all leads & lifts complete in all respects as per the directions of the Engineer -in -Charge.

Supplying and packing of gravel, consisting of hard quartz or other suitable material with an average specific gravity of not less than 2.5, not containing more than 2% by weight of thin flat of elangated pieces, shall be of sub rounded to rounded grains with minimum angular features of size 2-3.35 mm ,shall be free from impurities such as shafe, shale, mica, felspar, clay, sand,dirt loam,baematte and organic material as pe IS 4097-1967 with upto date amendments, if any, around intake of tubewell with minimum thickness of shroud around screen generally 100 mm to the entire depth of the bore as per 2800 (Part-I ) 1991 with upto date amendments, if any, within all leads & lifts complete in all respects as per the directions of the Engineer -in -Charge.

Development of tubewell by back washing method, with air compressor of minimum 750 CFM capacity, pumping pipe of 200 mm size and air line of minimum 65 mm size or with other suitable method,till the well is thoroughly developed as per clause 4.2 of IS 11189-1985, with upto date anebdnebts, if any, within all leads & lifts complete in all respects as per the directions of the Engineer -in -Charge.

Development of tubewell by continuous over pumping method,with VT pump/ submersible pumps of suitable capacity not less than double the discharge established by the compressor method/ design discharge, untill the well is sand free as per IS-11189-1985 up -to- date amendments, if any, complete in all respects as per directions of the Engineer -in- Charge .The draw down and discharge to be established by running the VT / Submersible pump continously for 8 hours in the presence of officer not less than the rank of Assistant Engineer.

Testing the verticality of the tubewell as per clause 4.3 of IS 2800 ( Part-II) 1979 with upto date amendments, if any, using plumb or plunger 6 mm smaller in dia within the inside diameter of the well casing.The results of the verticality test shall be recorded on proforma shown in Appendix A of IS 2800 (Part-II) 1979 with up-to-date ammendments, if any, as appended with the tender documents and handed over complete in all respect as the directions of the Engineer -in- Charge.

Dismentalling of Rig or other allied accesssories after completion of job within all leads & lifts, complete in all respects as per the directions of the Engineer -in- Charge.

Handing over of the tubewell in complete shape as per appendex "B" of clause 7 of IS 2800 (Part-II) -1979 with upto date ammendmentes if any, as appended with the tender documents, in laminated form , in triplicate, complete within all leads & lifts complete in all respects as per the directions of the Engineer -in -Charge.

Providing chain pulley block tripod with chain pulley having capacity of 1 Ton complete within all leads & lifts complete in all respects as per the directions of the Engineer -in -Charge.

Drilling, Lowering of assembly & Development of Tubewell 120 m deep (Rotary Rig) including chamber at TWIS Samoor Kalan,Vill Samoor kalan,G.P Samoor Kalan,Tehsil Una, Distt Una (H.P)

Earth work in excavation by mechanical means (Hydraulic excavator) / manual means in foundation, trenches or drains, pits upto all depths in all classification of earth work such as pick work, jumper work, saturated soil including bailing and pumping out water, chieselling soft / hard rock including dressing of sides and ramming of bottoms, including getting out the excavated soil and disposal of surplus excavated soil as directed, within all leads and lifts complete in all respect and to the entire satisfaction of the Engineer-in-Charge.

Providing and laying in position cement concrete 1:4:8 (1 Cement: 4 coarse sand : 8 graded stone aggregate 40 mm nominal size) and curing complete excluding the cost of centering and shuttering complete in all respect within all leads and lifts and to the entire satisfaction of the Engineer-in-Charge.

Brick work with common burnt clay F.P.S. (non modular) bricks of class designation 7.5 in foundation & plinth in all shapes and sizes Cement mortar 1:6 (1 cement : 6 coarse sand) complete in all respect within all leads and lifts and to the entire satisfaction of the Engineer-in-Charge.

15 mm cement plaster on the rough side of brick wall in cement mortar 1:4 (1 cement: 4 Coarse sand) complete in all respect within all leads and lifts and to the entire satisfaction of the Engineer-in-Charge.

Transportation of Rig along with allied accessories etc. complete including errection and levelling at site, through all kinds of roads, approaches fields etc. in all leads and lifts completed in all respects as per the directions of Engineer - in-Charge.

Drilling of bore as per specification laid down in IS 2800-1991 (part-I) with upto date ammendments,if any,with percussion Rig /Direct Rotary Rig or combination drilling Rig. starting with 650-600 mm dia M.S pipe reduced to 450-400 mm dia M.S pipe confirming to IS 4270-2001 with up-to-date ammendements ,if any, in all kind of soils, boulders, rocks, collapsible strata, saturated soils,artesian conditions including the cost of all consumable, stores,water,fuel,lubricants and other accessories etc. complete in all respectsd as per the directions of the Engineer -in -Charge.

Drilling and lowering of M.S casing pipes confirming to IS 4270-2001 with up-to-date ammendments,if any, of suitable sizes as mentioned above,from 0-30 mtrs below ground level complete in all respectsd as per the directions of the Engineer -in -Charge.

Drilling and lowering of M.S casing pipes confirming to IS 4270-2001 with up-to-date ammendments,if any, of suitable sizes as mentioned above,from 30-60 mtrs below ground level complete in all respectsd as per the directions of the Engineer -in -Charge.

Drilling and lowering of M.S casing pipes confirming to IS 4270-2001 with up-to-date ammendments,if any, of suitable sizes as mentioned above,from 60-90 mtrs below ground level complete in all respectsd as per the directions of the Engineer -in -Charge.

Drilling and lowering of M.S casing pipes confirming to IS 4270-2001 with up-to-date ammendments,if any, of suitable sizes as mentioned above,from 90-140 mtrs below ground level within all leads and lifts.

Collection, preservaion and display of suitable size sample box with top lid and locking arrangement till handing over of the tube well to the department complete in all respects as per the directions of the Engineer -in -Charge.

Supply and lowering of IS marked Electric Resistance Welded M.S. pipe 300 mm dia nominal size housing, 7.1 mm thick having out side dia mtrs. 323.90 mm bevelled edge confirming to I.S. 4270-2001 with up-to date amendments, if any ,about 4 mtrs to 7 mtrs in length, welded without any circumferential joints, into bore hole in vertical position including cost of all scaffolding derricks, poles, clamps embedded in foundation etc. including cost of all cutting, threading and welding of pipes etc. within all leads and lifts,complete in all respects as per the directions of the Engineer -in-Charge.

Supplying and Lowering at site Electric Resistance Welded ( ERW) Stainless Steel Cage type "V" wire wound screens of size 300 mm , 7.1 mm thick with slot opening 1.0 mm,as per IS 8110-2000 with upto date ammendments,if any, and material specification as per AISI" American Iron and Steel Inst " Type Grade SS-304 in suitable lenghts as per site conditions, including the cost of SS socket 8mm thickness(supplied by the department ) of length 140 mm, confirming to AISI grade 304, suitable to accomodate screen and ring including jointing screen with blind pipes complete in all respects all scaffolding derricks, poles, clamps, embedding in foundation etc. including cost of all cutting, threading and welding of pipes etc. within all leads and lifts complete in all respects as per the directions of the Engineer - in - Charge. Screen will be of continuous trapezoidal wire spirally wound around fabricated cage. The wrapping wire having "V" shaped ( Wedge) profile wire with flat surface on the outside and producing expanding slots on the inside of various dimensions, resistance welded to a cylindrical body made of number of longitudinal special high tensile support rods to provides smooth unrestricted bore which are in turn welded into cylindrical ring couplings on both sides of screens within all leads & lifts complete in all respects as per the directions of the Engineer -in -Charge.

Providing and fixing M.S. centralized guides at suitable spacing for each tubewell as per IS 226:1991 with upto date amendments ,if any, within all leads & lifts complete in all respects as per the directions of the Engineer -in -Charge.

Supply and lowering in position IS marked mild steel bail plug of 200mm/300mm diameters with "U" hooks as per IS 2800-1991 with upto date amendments ,if any, within all leads & lifts complete in all respects as per the directions of the Engineer -in -Charge.

Providing and fixing in position threaded iron cap with locking arrangements of approved design to prevent foreign matter from getting into borehole as required within all leads & lifts complete in all respects as per the directions of the Engineer -in -Charge.

Supplying and packing of gravel, consisting of hard quartz or other suitable material with an average specific gravity of not less than 2.5, not containing more than 2% by weight of thin flat of elangated pieces, shall be of sub rounded to rounded grains with minimum angular features of size 2-3.35 mm ,shall be free from impurities such as shafe, shale, mica, felspar, clay, sand,dirt loam,baematte and organic material as pe IS 4097-1967 with upto date amendments, if any, around intake of tubewell with minimum thickness of shroud around screen generally 100 mm to the entire depth of the bore as per 2800 (Part-I ) 1991 with upto date amendments, if any, within all leads & lifts complete in all respects as per the directions of the Engineer -in -Charge.

Development of tubewell by back washing method, with air compressor of minimum 750 CFM capacity, pumping pipe of 200 mm size and air line of minimum 65 mm size or with other suitable method,till the well is thoroughly developed as per clause 4.2 of IS 11189-1985, with upto date anebdnebts, if any, within all leads & lifts complete in all respects as per the directions of the Engineer -in -Charge.

Development of tubewell by continuous over pumping method,with VT pump/ submersible pumps of suitable capacity not less than double the discharge established by the compressor method/ design discharge, untill the well is sand free as per IS-11189-1985 up -to- date amendments, if any, complete in all respects as per directions of the Engineer -in- Charge .The draw down and discharge to be established by running the VT / Submersible pump continously for 8 hours in the presence of officer not less than the rank of Assistant Engineer.

Testing the verticality of the tubewell as per clause 4.3 of IS 2800 ( Part-II) 1979 with upto date amendments, if any, using plumb or plunger 6 mm smaller in dia within the inside diameter of the well casing.The results of the verticality test shall be recorded on proforma shown in Appendix A of IS 2800 (Part-II) 1979 with up-to-date ammendments, if any, as appended with the tender documents and handed over complete in all respect as the directions of the Engineer -in- Charge.

Dismentalling of Rig or other allied accesssories after completion of job within all leads & lifts, complete in all respects as per the directions of the Engineer -in- Charge.

Handing over of the tubewell in complete shape as per appendex "B" of clause 7 of IS 2800 (Part-II) -1979 with upto date ammendmentes if any, as appended with the tender documents, in laminated form , in triplicate, complete within all leads & lifts complete in all respects as per the directions of the Engineer -in -Charge.

Providing chain pulley block tripod with chain pulley having capacity of 1 Ton complete within all leads & lifts complete in all respects as per the directions of the Engineer -in -Charge.

Drilling, Lowering of assembly & Development of Tubewell,125 m deep (Rotary Rig) including chamber at Village Teuri, G.P. Teuri, Tehsil & District Una (H.P) under HPCDP (Phase-II) JICA-ODA

Earth work in excavation by mechanical means (Hydraulic excavator) / manual means in foundation, trenches or drains, pits upto all depths in all classification of earth work such as pick work, jumper work, saturated soil including bailing and pumping out water, chieselling soft / hard rock including dressing of sides and ramming of bottoms, including getting out the excavated soil and disposal of surplus excavated soil as directed, within all leads and lifts complete in all respect and to the entire satisfaction of the Engineer-in-Charge.

Providing and laying in position cement concrete 1:4:8 (1 Cement: 4 coarse sand : 8 graded stone aggregate 40 mm nominal size) and curing complete excluding the cost of centering and shuttering complete in all respect within all leads and lifts and to the entire satisfaction of the Engineer-in-Charge.

Brick work with common burnt clay F.P.S. (non modular) bricks of class designation 7.5 in foundation & plinth in all shapes and sizes Cement mortar 1:6 (1 cement : 6 coarse sand) complete in all respect within all leads and lifts and to the entire satisfaction of the Engineer-in-Charge.

15 mm cement plaster on the rough side of brick wall(single or half brick wall) in cement mortar 1:4 (1 cement: 4 Coarse sand) complete in all respect within all leads and lifts and to the entire satisfaction of the Engineer-in-Charge.

Transportation of Rig along with allied accessories etc. complete including errection and levelling at site, through all kinds of roads, approaches fields etc. in all leads and lifts completed in all respects as per the directions of Engineer - in-Charge.

Drilling of bore as per specification laid down in IS 2800-1991 (part-I) with upto date ammendments,if any,with percussion Rig /Direct Rotary Rig or combination drilling Rig. starting with 650-600 mm dia M.S pipe reduced to 450-400 mm dia M.S pipe confirming to IS 4270-2001 with up-to-date ammendements ,if any, in all kind of soils, boulders, rocks, collapsible strata, saturated soils,artesian conditions including the cost of all consumable, stores,water,fuel,lubricants and other accessories etc. complete in all respectsd as per the directions of the Engineer -in -Charge.

Drilling and lowering of M.S casing pipes confirming to IS 4270-2001 with up-to-date ammendments,if any, of suitable sizes as mentioned above,from 0-30 mtrs below ground level complete in all respectsd as per the directions of the Engineer -in -Charge.

Drilling and lowering of M.S casing pipes confirming to IS 4270-2001 with up-to-date ammendments,if any, of suitable sizes as mentioned above,from 30-60 mtrs below ground level complete in all respectsd as per the directions of the Engineer -in -Charge.

Drilling and lowering of M.S casing pipes confirming to IS 4270-2001 with up-to-date ammendments,if any, of suitable sizes as mentioned above,from 60-90 mtrs below ground level complete in all respectsd as per the directions of the Engineer -in -Charge.

Drilling and lowering of M.S casing pipes confirming to IS 4270-2001 with up-to-date ammendments,if any, of suitable sizes as mentioned above,from 90-140 mtrs below ground level within all leads and lifts.

Collection, preservaion and display of suitable size sample box with top lid and locking arrangement till handing over of the tube well to the department complete in all respects as per the directions of the Engineer -in -Charge.

Supply and lowering of IS marked Electric Resistance Welded M.S. pipe 300 mm dia nominal size housing, 7.1 mm thick having out side dia mtrs. 323.90 mm bevelled edge confirming to I.S. 4270-2001 with up-to date amendments, if any ,about 4 mtrs to 7 mtrs in length, welded without any circumferential joints, into bore hole in vertical position including cost of all scaffolding derricks, poles, clamps embedded in foundation etc. including cost of all cutting, threading and welding of pipes etc. within all leads and lifts,complete in all respects as per the directions of the Engineer -in-Charge.

Supplying and Lowering of IS marked Electric Resistance Welded Slotted M.S.pipe 300 mm dia nominal size housing,7.10 mm thick having out side dia mtrs.323.90 mm bevelled edge confirming to I.S. 4270-2001 with upto date amendement,if any,about 4 mtrs to 7 mtrs in length,welded without any cicumferential joints,into bore hole in vertical position including cost of all cutting,threading and welding of pipes etc.within all leads and lifts,complete in all respects as per the directions of the Engineer-in-Charge.

Providing and fixing M.S. taper / reducer as per lengths approved by Engineer -in-Charge ,the material of M.S taper/reducer shall be equivalent to parent pipe material and shall conform to chemical composition as per 4270-2001 with upto date ammendments ,if any, within all leads & lifts complete in all respects as per the directions of the Engineer -in -Charge.

Supply and lowering of IS marked Electric Resistance Welded M.S.pipe 200 mm nominal size housing, 6.40 mm thick having out side dia mtrs. 219.10 mm bevelled edge confirming to I.S. 4270-2001 with up-todate ammendments, if any ,about 4 mtrs to 7 mtrs in length, welded without any circumferential joints, into bore hole in vertical position including cost of all scaffolding derricks,poles,clamps embedded in foundation etc. including cost of all cutting,threading and welding of pipes etc. within all leads & lifts complete in all respects as per the directions of the Engineer -in -Charge.

Supplying and Lowering of IS marked Electric Resistance Welded Slotted M.S.pipe 200 mm dia nominal size housing,6.40 mm thick having out side dia mtrs.219.10 mm bevelled edge confirming to I.S. 4270-2001 with upto date amendement,if any,about 4 mtrs to 7 mtrs in length,welded without any cicumferential joints,into bore hole in vertical position including cost of all scaffolding derricks,poles,clamps embedded in foundation etc.includding cost of all cutting,threading and welding of pipes etc.within all leads and lifts,complete in all respects as per the directions of the Engineer-in-Charge.

Providing and fixing M.S centralized guides at suitable spacing for each tube well as per IS 226-1991 with up-to-date amendments if any, within all leads and lifts ,1x4Nos. within all leads & lifts complete in all respects as per the directions of the Engineer -in -Charge.

Supplying ,lowering and fixing in position IS marked mild steel bail plug of 200 mm/ 300 mm diameters with "U" hooks as per IS 2800-1991 with up -to date amendements ,ifany, within all leads & lifts complete in all respects as per the directions of the Engineer -in -Charge.

Providing. and fixing in position threaded iron cap with locking arrangements of approved design to prevent foreign matter from getting into bore hole,as required, within all leads & lifts complete in all respects as per the directions of the Engineer -in -Charge.

Supplying and packing of gravel, consisting of hard quartz or other suitable material with an average specific gravity of not less than 2.5, not containing more than 2% by weight of thin flat of elangated pieces, shall be of sub rounded to rounded grains with minimum angular features of size 2-3.35 mm ,shall be free from impurities such as shafe, shale, mica, felspar, clay, sand,dirt loam,baematte and organic material as pe IS 4097-1967 with upto date amendments, if any, around intake of tubewell with minimum thickness of shroud around screen generally 100 mm to the entire depth of the bore as per 2800 (Part-I ) 1991 with upto date amendments, if any, within all leads & lifts complete in all respects as per the directions of the Engineer -in -Charge.

Development of tubewell by back washing method, with air compressor of minimum 750 CFM capacity, pumping pipe of 200 mm size and air line of minimum 65 mm size or with other suitable method,till the well is thoroughly developed as per clause 4.2 of IS 11189-1985, with upto date anebdnebts, if any, within all leads & lifts complete in all respects as per the directions of the Engineer -in -Charge.

Development of tubewell by continuous over pumping method,with VT pump/ submersible pumps of suitable capacity not less than double the discharge established by the compressor method/ design discharge, untill the well is sand free as per IS-11189-1985 up -to- date amendments, if any, complete in all respects as per directions of the Engineer -in- Charge .The draw down and discharge to be established by running the VT / Submersible pump continously for 8 hours in the presence of officer not less than the rank of Assistant Engineer.

Testing the verticality of the tubewell as per clause 4.3 of IS 2800 ( Part-II) 1979 with upto date amendments, if any, using plumb or plunger 6 mm smaller in dia within the inside diameter of the well casing.The results of the verticality test shall be recorded on proforma shown in Appendix A of IS 2800 (Part-II) 1979 with up-to-date ammendments, if any, as appended with the tender documents and handed over complete in all respect as the directions of the Engineer -in- Charge.

Dismentalling of Rig or other allied accesssories after completion of job within all leads & lifts, complete in all respects as per the directions of the Engineer -in- Charge.

Handing over of the tubewell in complete shape as per appendex "B" of clause 7 of IS 2800 (Part-II) -1979 with upto date ammendmentes if any, as appended with the tender documents, in laminated form , in triplicate, complete within all leads & lifts complete in all respects as per the directions of the Engineer -in -Charge.

Providing chain pulley block tripod with chain pulley having capacity of 1 Ton complete within all leads & lifts complete in all respects as per the directions of the Engineer -in -Charge.