FOR CONSTRUCTION OF EW and OW

Amount

Drilling of pilot hole not larger than 216 mm (8 ½”) by rock roller/ drag bit using bentonite mud fluid including sample collection and preparation of litholog

Electrical logging using 406 mm and 1626 mm (16" and 64") SP resistivity probe and preparation of composite log

Natural gamma logging

Enlargement of hole by reaming to accommodate well assembly of recommended size and gravel envelop of minimum 100 mm thickness

Using 444.5 mm (17-1/2”) RR Bit for 200 mm (8”) assembly pipe

Using 381 mm ( 15”) RR Bit for 150 mm (6”) assembly pipe

Using 311.15 mm ( 12-1/4”) RR Bit for 100 mm (4”) assembly pipe

Supply and installation of ERW casing pipe conforming to Table 3 of latest version of IS: 4270-2001

200 mm (8”) Nominal Bore

150 mm (6”) Nominal Bore

100 mm (4”) Nominal Bore

Supply and installation of LCG V- wire screen conforming to latest version of IS: 8110-2000

150 mm (6”) Nominal Size Slot opening 1.0 mm

100 mm (4”) Nominal Size Slot opening 1.0 mm

Supply and shrouding of pea gravel confirming to latest version of IS: 4097-1967

Particle size range 3.35 mm to 4.75 mm for 1.5 mm slot opening

Development by Air Compressor of adequate capacity for minimum 10 hours, over pumping and by other means till discharge water is clear and free of sand including collection of one water samples from observation well adopting standard procedure in 1 litre HDPE bottle, along with video recordings of compressor hour meter, discharge etc.

Developement unit till water become sand/slit free and Pumping test ( minimum 20 hours) , SDT, APT and collection of 6 water samples in teflone coated/HDPE Bottle per site) and submission of data in prescribed porforma and analysis report

chemical analysis of water samples for 15 parameters pH, EC, TH, TDS, Ca, Mg, Na, K, CO3, HCO3, SO4, NO3, Cl, F in NABL accredited labs (collection of 6 water samples in teflone coated/HDPE Bottle per site)

chemical analysis of water samples for Heavy metals Zn, Mn,Pb,Fe, Cr,Cu,Se,Ni & U As in NABL accredited labs (collection of 6 water samples in teflone coated/HDPE Bottle per site)

Construction of cement concrete platform of dimension 0.70 X 0.70 X 0.60 m (0.30 m above ground level) using concrete mix of 1:2:4 around the housing pipe welded with minimum 6 Nos of anchoring plate as per drawing

Supply and fitting of well cap as per drawing with Allen Keys. MS Plate size 5 mm embossed & welded with permanent marking of “ CGWB EW” for exploratory wells and “ CGWB OW” for observation wells should be carved with welding on outer surface of casing pipe 0.5m.

Supply and installation of protection box made of 3.00 mm GI sheet of Size: 550mm X450mm X530mm along with Brass lock (7 lever hardened) and three keys for each lock as per drawing

Supply and installation of Display Board as per drawing

Preparation and submission of basic data report along with analysis sheet, graph sheet, datas etc

Description of Work / Item(s)

Amount

Drilling of pilot hole using bentonite fluid for EW not larger than 216 mm (8 ½”) by rock roller/ drag bit including formation sample collection at every 3m and change in formation , preparation and submission of litholog along with video recordings

Electrical logging using 406 mm and 1626 mm (16" and 64") SP resistivity probe , Natural gamma logging , to target depth of minimum 300m submission of report including zone wise water quality and preparation of composite log along with video recordings

Enlargement of hole by reaming in EW to accommodate well assembly of recommended size and gravel envelop of minimum 100 mm thickness as given below

Using 508 mm (20”) RR Bit for 250 mm (10”) assembly pipe

Using 381 mm ( 15”) RR Bit for 150 mm (6”) assembly pipe

Drilling of Hole for OW by rock roller/ drag bit of size given below to accommodate well assembly of recommended size and gravel envelop of minimum 100 mm thickness, including sample collection and preparation of litholog along with video recordings

Using 381 mm (15”) RR Bit for 150 mm (6”) assembly pipe

Supply and installation of ERW casing pipe conforming to latest version of IS: 4270-2001 of diameter and thickness given below

250 mm (10”) Nominal Bore, pipe thickness 7.1 mm

150 mm (6”) Nominal Bore, pipe thickness 5.4 mm

Supply and installation of LCG V- wire screen conforming to latest version of IS: 8110-2000 of dimensions given below

150 mm (6”) Nominal Size thickness 7mm with slot opening size given below Slot opening 1.5 mm

Supply and shrouding of pea gravel confirming to latest version of IS: 4097-1967

Particle size range 3.35 mm to 4.75 mm for 1.5 mm slot opening

Cement sealing using 53 grade cement of 5 m thickness including 1m thick fine sand/ clay between cement seal and gravel pack.

Supply and filling up borehole/ annular space between casing pipe and bore hole wall with local clay, if required

Development by Air Compressor of adequate capacity for minimum 20 hours, over pumping and by other means till discharge water is clear and free of sand including collection of two water samples from OW adopting standard procedure in 1 litre HDPE bottle, along with video recordings of compressor hour meter, discharge etc.

Pumping testincluding pre pumping for 8 hours and 24 hours recuperation, SDT, APT( for 1000 minutes and 90% or full recovery) and collection of 4 Nos. of water samples using standard procedure for basic parameters per EW in 1 litre HDPE bottle) and for heavy metals and submission of report with data, graph sheet , analysis etc. along with video recordings

Preliminary Yield Test of 100 minutes by lowering of pump in wells where SDT & APT is not being carried out - including collection of 2Nos. water samples adopting standard procedure for basic parameter and heavy metals in 1 litre good quality HDPE bottle and submission of analysis report with data with video recordings.

Chemical analysis of water samples for 15 parameters (pH, EC, TH, TDS, Ca, Mg, Na, K, CO3, HCO3, SO4, NO3, Cl, F & Fe) in NABL accredited lab and submission of report from NABL lab

Chemical analysis of water samples for Heavy Metals (As, Pb, Zn, Cu, Cr, Se, Ni, Mn, U) in NABL accredited lab and submission of report from NABL lab

Construction of cement concrete platform of dimension 0.70 X 0.70 X 0.60 m (0.30 m above ground level) using concrete mix of 1:2:4 around the housing pipe welded with minimum 6 nos. of anchoring plate as per drawing

Supply and fitting of well cap as per drawing with Allen Keys. MS Plate size 5 mm embossed & welded with permanent marking of “CGWB EW” for Exploratory Wells & "CGWB OW" for Observation Wells should be carved with welding on outer surface of casing pipe

Supply and installation of protection box made of GI sheet of 3.00 mm thickness along with Brass lock (7 lever hardened of branded item) and three keys/District wise Master Key for each lock as per drawing

Supply and installation of Display Board as per drawing

Preparation and submission of basic data report per site (includes EW and OW) in triplicate along with logging graphs, data sheets, analysis sheet, logging graphs, chemical analysis report from NABL lab, site location map and approachability with land marks, photographs and videos of activities of drilling, assembly lowering, gravel measurement and gravel packing, well development using compressor and well water discharge, pump lowering, pumping test (SDT, APT, PYT), water sample collection, well discharge with discharge measurement/orifice with manometer head, well site with display board, well cap, protection box for each EW site etc. The soft copy and hard copy should be submitted. Summary of wells details in xls format including details of dia and depth of housing pipe, assembly pipe, screen pipe, static water level, aquifer parameters, safe discharge, gravel packing depth and thickness, chemical analysis result (basic parameters and heavy metals) etc. should be also submitted as detailed report.

Description of Work / Item(s)

Amount

Drilling of pilot hole not larger than 216 mm (8 ½”) by rock roller/ drag bit using bentonite mud fluid including sample collection and preparation of litholog

Electrical logging using 406 mm and 1626 mm (16" and 64") SP resistivity probe and preparation of composite log

Natural gamma logging

Enlargement of hole by reaming to accommodate well assembly of recommended size and gravel envelop of minimum 100 mm thickness

Using 444.5 mm (17-1/2”) RR Bit for 200 mm (8”) assembly pipe

Using 381 mm ( 15”) RR Bit for 150 mm (6”) assembly pipe

Using 311.15 mm ( 12-1/4”) RR Bit for 100 mm (4”) assembly pipe

Supply and installation of ERW casing pipe conforming to Table 3 of latest version of IS: 4270-2001

200 mm (8”) Nominal Bore

150 mm (6”) Nominal Bore

100 mm (4”) Nominal Bore

Supply and installation of LCG V- wire screen conforming to latest version of IS: 8110-2000

150 mm (6”) Nominal Size Slot opening 0.75 mm

100 mm (4”) Nominal Size Slot opening 1.0 mm

Supply and shrouding of pea gravel confirming to latest version of IS: 4097-1967

Particle size range 3.35 mm to 4.75 mm for 1.5 mm slot opening

Development by Air Compressor of adequate capacity for minimum 10 hours, over pumping and by other means till discharge water is clear and free of sand including collection of one water samples from observation well adopting standard procedure in 1 litre HDPE bottle, along with video recordings of compressor hour meter, discharge etc.

Developement unit till water become sand/slit free and Pumping test ( minimum 20 hours) , SDT, APT and collection of 6 water samples in teflone coated/HDPE Bottle per site) and submission of data in prescribed porforma and analysis report

chemical analysis of water samples for 15 parameters pH, EC, TH, TDS, Ca, Mg, Na, K, CO3, HCO3, SO4, NO3, Cl, F in NABL accredited labs (collection of 6 water samples in teflone coated/HDPE Bottle per site)

chemical analysis of water samples for Heavy metals Zn, Mn,Pb,Fe, Cr,Cu,Se,Ni & U As in NABL accredited labs (collection of 6 water samples in teflone coated/HDPE Bottle per site)

Construction of cement concrete platform of dimension 0.70 X 0.70 X 0.60 m (0.30 m above ground level) using concrete mix of 1:2:4 around the housing pipe welded with minimum 6 Nos of anchoring plate as per drawing

Supply and fitting of well cap as per drawing with Allen Keys. MS Plate size 5 mm embossed & welded with permanent marking of “ CGWB EW” for exploratory wells and “ CGWB OW” for observation wells should be carved with welding on outer surface of casing pipe 0.5m.

Supply and installation of protection box made of 3.00 mm GI sheet of Size: 550mm X450mm X530mm along with Brass lock (7 lever hardened) and three keys for each lock as per drawing

Supply and installation of Display Board as per drawing

Preparation and submission of basic data report along with analysis sheet, graph sheet, datas etc

Description of Work / Item(s)

Amount

Drilling of pilot hole using bentonite fluid for EW not larger than 216 mm (8 ½”) by rock roller/ drag bit including formation sample collection at every 3m and change in formation , preparation and submission of litholog along with video recordings

Electrical logging using 406 mm and 1626 mm (16" and 64") SP resistivity probe , Natural gamma logging , to target depth of minimum 300m submission of report including zone wise water quality and preparation of composite log along with video recordings

Enlargement of hole by reaming in EW to accommodate well assembly of recommended size and gravel envelop of minimum 100 mm thickness as given below

Using 558.8 mm (22”) RR Bit for 300 mm (12”) assembly pipe

Using 381 mm ( 15”) RR Bit for 150 mm (6”) assembly pipe

Drilling of Hole for OW by rock roller/ drag bit of size given below to accommodate well assembly of recommended size and gravel envelop of minimum 100 mm thickness,including sample collection and preparation of litholog along with video recordings

Using 381 mm ( 15”) RR Bit for 150 mm (6”) assembly pipe

Supply and installation of ERW casing pipe conforming to latest version of IS: 4270-2001 of diameter and thickness given below

300 mm (12”) Nominal Bore ,thickness 7.1mm

150 mm (6”) Nominal Bo,re thickness 5.4mm

Supply and installation of LCG V- wire screen conforming to latest version of IS: 8110-2000 of dimensions given below

150 mm (6”) Nominal Size thicnkness 7mm with slot opening size given below Slot opening 1.0 mm

Supply and shrouding of pea gravel confirming to latest version of IS: 4097-1967

Particle size range 2.00 mm to 3.35 mm for 1.0 mm and 0.75 mm slot opening

Cement sealing using 53 grade cement of 5m thickness including 1m thick fine sand/ clay between cement seal and Gravel pack.

Supply and filling up borehole/ annular space between casing pipe and bore hole wall with local clay, if required

Development by Air Compressor of adequate capacity for minimum 10 hours, over pumping and by other means till discharge water is clear and free of sand including collection of two water samples from OW adopting standard procedure in 1 litre HDPE bottle, along with video recordings of compressor hour meter, discharge etc.

Pumping test (incudes pre pumping for 8 hours and 24 hours recuperaton, SDT, APT( for 1000 minutes and 90% or full recovery) and collection of 4 Nos. of water samples using standard procedure for basic parametes per EW in 1 litre HDPE bottle) and for heavy metals and submission of report with data, graph sheet , analysis etc. along with video recordings

chemical analysis of water samples for 15 parameters pH, EC, TH, TDS, Ca, Mg, Na, K, CO3, HCO3, SO4, NO3, Cl, F & Fe in NABL accredited labs

chemical analysis of water samples for Heavy metals Arsenic, Cadmium, Mercury, Lead in NABL accredited labs

Construction of cement concrete platform of dimension 0.70 X 0.70 X 0.60 m (0.30 m above ground level) using concrete mix of 1:2:4 around the housing pipe welded withminimum 6 Nos of anchoring plate as per drawing

Supply and fitting of well cap as per drawing with Allen Keys. MS Plate size 5 mm embossed & welded with permanent marking of “ CGWB EW” for Exploratory Wells & "CGWB OW" for Observation wells should carved with welding on outer surface of casing pipe 0.5mtrs

Supply and installation of protection box along with Brass lock (7 lever hardened) and three keys for each lock as per drawing

Supply and installation of Display board as per drawing

Preparation and submission of basic data report per site (includes EW and OW) in triplicate along with logging graphs, data sheets, analysis sheet,logging graphs ,chemical analysis report from NABL lab, site location map and approachability with land marks, photographs and videos of activities of drilling, assembly lowering, gravel measurement and gravel packing, well development using compressor and well water discharge,pump lowering, pumping test(SDT, APT, PYT), water sample collection, well discharge with discharge measurement/orifice with manometer head, well site with display board well cap, protection box activity for each EW site, etc.The soft copy should be submitted.Summary of wells details in xls format (as per proforma given by CGWB) including details of dia and depth housing pipe, assembly pipe, screen pipe, static water level, TDS, aquifer parameters, safe discharge,gravel packing depth and thickness, Litholog etc should be also submitted.

Description of Work / Item(s)

Amount

Drilling of pilot hole using bentonite fluid for EW not larger than 216 mm (8 ½”) by rock roller/ drag bit including formation sample collection at every 3m and change in formation , preparation and submission of litholog along with video recordings

Electrical logging using 406 mm and 1626 mm (16" and 64") SP resistivity probe , Natural gamma logging , to target depth of minimum 300m submission of report including zone wise water quality and preparation of composite log along with video recordings

Enlargement of hole by reaming in EW to accommodate well assembly of recommended size and gravel envelop of minimum 100 mm thickness as given below

Using 558.8 mm (22”) RR Bit for 300 mm (12”) assembly pipe

Using 381 mm ( 15”) RR Bit for 150 mm (6”) assembly pipe

Drilling of Hole for OW by rock roller/ drag bit of size given below to accommodate well assembly of recommended size and gravel envelop of minimum 100 mm thickness,including sample collection and preparation of litholog along with video recordings

Using 381 mm ( 15”) RR Bit for 150 mm (6”) assembly pipe

Supply and installation of ERW casing pipe conforming to latest version of IS: 4270-2001 of diameter and thickness given below

300 mm (12”) Nominal Bore ,thickness 7.1mm

150 mm (6”) Nominal Bo,re thickness 5.4mm

Supply and installation of LCG V- wire screen conforming to latest version of IS: 8110-2000 of dimensions given below

150 mm (6”) Nominal Size thicnkness 7mm with slot opening size given below Slot opening 1.0 mm

Supply and shrouding of pea gravel confirming to latest version of IS: 4097-1967

Particle size range 2.00 mm to 3.35 mm for 1.0 mm and 0.75 mm slot opening

Cement sealing using 53 grade cement of 5m thickness including 1m thick fine sand/ clay between cement seal and Gravel pack.

Supply and filling up borehole/ annular space between casing pipe and bore hole wall with local clay, if required

Development by Air Compressor of adequate capacity for minimum 10 hours, over pumping and by other means till discharge water is clear and free of sand including collection of two water samples from OW adopting standard procedure in 1 litre HDPE bottle, along with video recordings of compressor hour meter, discharge etc.

Pumping test (incudes pre pumping for 8 hours and 24 hours recuperaton, SDT, APT( for 1000 minutes and 90% or full recovery) and collection of 4 Nos. of water samples using standard procedure for basic parametes per EW in 1 litre HDPE bottle) and for heavy metals and submission of report with data, graph sheet , analysis etc. along with video recordings

chemical analysis of water samples for 15 parameters pH, EC, TH, TDS, Ca, Mg, Na, K, CO3, HCO3, SO4, NO3, Cl, F & Fe in NABL accredited labs

chemical analysis of water samples for Heavy metals Arsenic, Cadmium, Mercury, Lead in NABL accredited labs

Construction of cement concrete platform of dimension 0.70 X 0.70 X 0.60 m (0.30 m above ground level) using concrete mix of 1:2:4 around the housing pipe welded withminimum 6 Nos of anchoring plate as per drawing

Supply and fitting of well cap as per drawing with Allen Keys. MS Plate size 5 mm embossed & welded with permanent marking of “ CGWB EW” for Exploratory Wells & "CGWB OW" for Observation wells should carved with welding on outer surface of casing pipe 0.5mtrs

Supply and installation of protection box along with Brass lock (7 lever hardened) and three keys for each lock as per drawing

Supply and installation of Display board as per drawing

Preparation and submission of basic data report per site (includes EW and OW) in triplicate along with logging graphs, data sheets, analysis sheet,logging graphs ,chemical analysis report from NABL lab, site location map and approachability with land marks, photographs and videos of activities of drilling, assembly lowering, gravel measurement and gravel packing, well development using compressor and well water discharge,pump lowering, pumping test(SDT, APT, PYT), water sample collection, well discharge with discharge measurement/orifice with manometer head, well site with display board well cap, protection box activity for each EW site, etc.The soft copy should be submitted.Summary of wells details in xls format (as per proforma given by CGWB) including details of dia and depth housing pipe, assembly pipe, screen pipe, static water level, TDS, aquifer parameters, safe discharge,gravel packing depth and thickness, Litholog etc should be also submitted.

Description of Work / Item(s)

Amount

Drilling of overburden by rock roller/ drag/ button bit to accommodate casing pipe including sample collection, preparation and submission of litholog with video recordings of bit lowering, pull out after completion of overburden drilling, casing pipe lowering, discharge if any during overburden drilling etc.

Supply and installation of ERW casing pipe conforming to latest version of IS: 4270-2001

175 mm (7”) Nominal Bore, thickness 5.4mm

Drilling by DTH method using appropriate sizes of button bits so as to reach targetted depth with diameter of hole not less than 165 mm at 100 m depth and final diameter not less than 152 mm at hole bottom including measurement of discharge through V-notch at various stages (depth) of drilling, collection of water samples(2 times & 2 sets each time, 1 for basic and 1 treated with acid for trace elements, one set of sample for submission to CGWB) for each aquifer formation/fracture zone encountered adopting standard procedure, formation sample collection at every 3 meter intervals , preparation and submission of litholog, discharge measurement etc with video recordings discharge and V notch readings, lithlog samples, pull out of rods after completion of target depth of drilling

Caliper logging, submission of logging graph, report along with video recordings

Pumping Test incudes prepumping for 8 hours and recuperation for 24 hours , SDT (4 steps of 60 minutes each), APT for 1000 minutes and 90% or full recovery) and collection of water samples (1 during APT & 1 during SDT) adopting standard procedure for basic parameter and heavy metals in 1 litre good quality HDPE bottle along with video recordings. APT should be carried out with atleast 70% of the drilling discharge and last step of SDT should be atleast 70% of the drilling discharge

Preliminary yield test for 100 minutes including collection of 2Nos. Water samples ,one for basic parameter and other for heavy metals adopting standard procedurein 1 litre good quality HDPE bottle and submission of analysis report with data with video recordings. PYT to be carried out with atleast 70% of the drilling discharge

Slug test and submission of analyis report with data with video recordings

Chemical analysis of water samples for 15 parameters pH, EC, TH, TDS, Ca, Mg, Na, K, CO3, HCO3, SO4, NO3, Cl, F & Fe in NABL accredited labs and submission of report from NABL lab

Chemical analysis of water samples for Heavy metals Cr, Co, Mn, Cd, Ni, Pb & U in NABL accredited labs and submission of report from NABL lab

Construction of cement concrete platform of dimension 0.70 X 0.70 X 0.60 m (0.30 m above ground level) using concrete mix of 1:2:4 around the housing pipe welded withminimum 6 Nos of anchoring plate as per drawing

Supply and fitting of well cap as per drawing with Allen Keys. MS Plate size 5 mm embossed & welded with permanent marking of “ CGWB EW” for Exploratory Wells & "CGWB OW" for Observation wells should carved with welding on outer surface of casing pipe 0.5mtrs

Supply and installation of protection box made of GI sheet of 3.00 mm thickness along with Brass lock (7 lever hardened) and three keys for each lock as per drawing

Supply and installation of Display board as per specification in drawing

Preparation and submission of basic data report per site (includes EW and OW) in triplicate along with logging graphs, data sheets, analysis sheet,logging graphs ,chemical analysis report from NABL lab, photographs and videos of activities drilling , assembly lowering, part assmbly lowering, pump lowering, pumping tests, discharge during pumping test, V- notch discharge at various depth of drilling, pumping test with well discharge, compressor development, water sample collection, well site with display board well cap, protection box tec.. The soft copy should be submitted.Summary of wells details in xls format including details of dia and depth housing pipe, part assembly pipe if any, screen pipe if any, static water level, TDS, aquifer parameters, safe discharge,gravel packing depth and thickness , litholog, depth of fracture zone and respective V-notch discharge etc if any should be also submitted.

Description of Work / Item(s)

Amount

Drilling of overburden by rock roller/ drag/ button bit to accommodate casing pipe of 175 mm (7") dia. up to bed rock including formation sample collection at every 3 m interval, preparation and submission of litholog along with video recording

Supply and installation of ERW casing pipe conforming to latest version of IS: 4270-2001

175 mm (7”) Nominal Bore, pipe thickness 5.4 mm

Drilling by DTH method using appropriate sizes of button bits so as to reach targeted depth with diameter of hole not less than 165 mm at 100 m depth and final diameter not less than 152 mm at hole bottom including measurement of discharge through V-notch at various stages (depth) of drilling , collection of water sample for each aquifer /fracture zone encountered adopting standard procedure, sample collection at every 3 meter interval , preparation and submission of litholog, discharge measurement etc. with video recordings, discharge and V notch reading, lithlog samples, pull out of rods after completion of targeted depth of drilling

Caliper logging to decipher the depth and width of fracture zones, submission of detailed report including logging graph, interpretation of graph, generation of composite log along with video recordings

Pumping Test including pre-pumping for 8 hours and recuperation for 24 hours, SDT (3 steps), APT for 1000 minutes (90% or full recovery) and collection of 4 Nos. water samples adopting standard procedure for basic parameter and heavy metals in 1 litre good quality HDPE bottle along with video recordings

Chemical analysis of water samples for 15 parameters (pH, EC, TH, TDS, Ca, Mg, Na, K, CO3, HCO3, SO4, NO3, Cl, F & Fe) in NABL accredited lab and submission of report from NABL lab

Chemical analysis of water samples for Heavy metals (As, Pb, Zn, Cu, Cr, Se, Ni, Mn, U) in NABL accredited lab and submission of report from NABL lab

Construction of cement concrete platform of dimension 0.70 X 0.70 X 0.60 m (0.30 m above ground level) using concrete mix of 1:2:4 around the housing pipe welded with minimum 6 Nos. of anchoring plate as per drawing

Supply and fitting of well cap as per drawing with Allen Keys. MS Plate size 5 mm embossed & welded with permanent marking of “CGWB EW” for Exploratory Wells & "CGWB OW" for Observation Wells should be carved with welding on outer surface of casing pipe 0.5 m

Supply and installation of protection box made of GI sheet of 3.00 mm thickness along with Brass lock (7 lever hardened of branded item) and three keys/District wise Master Key for each lock as per drawing

Supply and installation of Display Board as per specification in drawing

Preparation and submission of Basic Data Report per site (including EW and OW) in triplicate along with logging graphs, data sheets, analysis sheet, chemical analysis report from NABL lab, photographs and videos of activities during drilling, assembly lowering, part assembly lowering, pump lowering, pumping tests, discharge during pumping test, V- notch discharge at various depth of drilling, pumping test with well discharge, compressor development, water sample collection, well site with display board, well cap, protection box etc. Soft copy and hard copy should be submitted. Summary of well details in xls format including details of dia and depth of housing pipe, part assembly pipe if any, screen pipe if any, static water level, aquifer parameters, safe discharge, gravel packing depth and thickness, litholog, depth of fracture zone and respective V-notch discharge, details of chemical analysis (basic parameters and heavy metals) should be also submitted in the detailed report.

Description of Work / Item(s)

Amount

Drilling of overburden by rock roller/ drag/ button bit to accommodate casing pipe of 175 mm (7") dia. up to bed rock including formation sample collection at every 3 m interval, preparation and submission of litholog along with video recording

Supply and installation of ERW casing pipe conforming to latest version of IS: 4270-2001

175 mm (7”) Nominal Bore, pipe thickness 5.4 mm

Drilling by DTH method using appropriate sizes of button bits so as to reach targeted depth with diameter of hole not less than 165 mm at 100 m depth and final diameter not less than 152 mm at hole bottom including measurement of discharge through V-notch at various stages (depth) of drilling, collection of water sample for each aquifer formation/fracture zone encountered adopting standard procedure, formation sample collection at every 3 meter intervals, preparation and submission of litholog, discharge measurement etc. with video recordings of discharge and V notch readings, litholog samples, pull out of rods after completion of target depth of drilling

Caliper logging to decipher the depth and width of fracture zones, submission of detailed report including logging graph, interpretation of graph, generation of composite log along with video recordings

Pumping Test including pre-pumping for 8 hours and recuperation for 24 hours, SDT (3 steps), APT for 1000 minutes (90% or full recovery) and collection of 4 Nos. water samples adopting standard procedure for basic parameter and heavy metals in 1 litre good quality HDPE bottle along with video recordings

Preliminary Yield Test (PYT) including collection of 2 Nos. water samples adopting standard procedure for Basic Parameters and Heavy Metals in 1 litre good quality HDPE bottle and submission of analysis report with data and video recordings

Slug Test and submission of analysis report with data and video recordings

Chemical analysis of water samples for 15 parameters (pH, EC, TH, TDS, Ca, Mg, Na, K, CO3, HCO3, SO4, NO3, Cl, F & Fe) in NABL accredited lab and submission of report from NABL lab

Chemical analysis of water samples for Heavy metals (As, Pb, Zn, Cu, Cr, Se, Ni, Mn, U) in NABL accredited lab and submission of report from NABL lab

Construction of cement concrete platform of dimension 0.70 X 0.70 X 0.60 m (0.30 m above ground level) using concrete mix of 1:2:4 around the housing pipe welded with minimum 6 Nos of anchoring plate as per drawing

Supply and fitting of well cap as per drawing with Allen Keys. MS Plate size 5 mm embossed & welded with permanent marking of “ CGWB EW” for Exploratory Wells & "CGWB OW" for Observation Wells should be carved with welding on outer surface of casing pipe 0.5 m

Supply and installation of protection box made of GI sheet of 3.00 mm thickness along with Brass lock (7 lever hardened of branded item) and three keys/District wise Master Key for each lock as per drawing

Supply and installation of Display Board as per specification in drawing

Preparation and submission of Basic Data Report per site (including EW and OW) in triplicate along with logging graphs, data sheets, analysis sheet, chemical analysis report from NABL lab, photographs and videos of activities during drilling, assembly lowering, part assembly lowering, pump lowering, pumping tests, discharge during pumping test, V- notch discharge at various depth of drilling, pumping test with well discharge, compressor development, water sample collection, well site with display board, well cap, protection box etc. Soft copy and hard copy should be submitted. Summary of well details in xls format including details of dia and depth of housing pipe, part assembly pipe if any, screen pipe if any, static water level, aquifer parameters, safe discharge, gravel packing depth and thickness, litholog, depth of fracture zone and respective V-notch discharge, details of chemical analysis (Basic Parameters and Heavy Metals) should be also submitted in the detailed report.

Description of Work / Item(s)

Amount

Drilling of pilot hole using bentonite fluid for EW not larger than 216 mm (8 ½”) by rock roller/ drag bit including formation sample collection at every 3 m and change in formation, preparation and submission of litholog along with video recordings

Electrical logging using 406 mm and 1626 mm (16" and 64") SP resistivity probe, Natural gamma logging to target depth of minimum 300 m, submission of report including zone wise water quality and preparation of composite log along with video recordings

Enlargement of hole by reaming in EW to accommodate well assembly of recommended size and gravel envelop of minimum 100 mm thickness as given below

Using 508 mm (20”) RR Bit for 250 mm (10”) assembly pipe

Using 381 mm (15”) RR Bit for 150 mm (6”) assembly pipe

Drilling of Hole for OW by rock roller/ drag bit of size given below to accommodate well assembly of recommended size and gravel envelop of minimum 100 mm thickness, including sample collection and preparation of litholog along with video recordings

Using 381 mm (15”) RR Bit for 150 mm (6”) assembly pipe

Supply and installation of ERW casing pipe conforming to latest version of IS: 4270-2001 of diameter and thickness given below

250 mm (10”) Nominal Bore, pipe thickness 7.1 mm

150 mm (6”) Nominal Bore, pipe thickness 5.4 mm

Supply and installation of MS slotted pipes conforming to sizes as per Table 1 with slotting arrangement shown in Figure 2 of latest version of IS: 8110-2000 of dimensions given below

150 mm (6”) Nominal Size thickness 7 mm with slot opening size given below Slot opening 1.5 mm

Supply and shrouding of pea gravel conforming to latest version of IS: 4097-1967

Particle size range 3.35 mm to 4.75 mm for 1.5 mm slot opening

Supply and filling up borehole/ annular space between casing pipe and bore hole wall with local clay, if required

Development by Air Compressor of adequate capacity for minimum 10 hours, over pumping and by other means till discharge water is clear and free of sand including collection of two water samples from OW adopting standard procedure in 1 litre HDPE bottle, along with video recordings of compressor hour meter, discharge etc.

Pumping test including pre pumping for 8 hours and 24 hours recuperation, SDT (for 300 minutes), APT (for 1000 minutes and 90% or full recovery) and collection of 4 Nos. of water samples using standard procedure for basic parameters per EW (in 1 litre HDPE bottle) and for heavy metals and submission of detailed report with data, graph sheet, analysis etc. along with video recordings.

Chemical analysis of water samples for 15 parameters (pH, EC, TH, TDS, Ca, Mg, Na, K, CO3, HCO3, SO4, NO3, Cl, F & Fe) in NABL accredited lab and submission of report from NABL lab

Chemical analysis of water samples for Heavy Metals (As, Pb, Zn, Cu, Cr, Se, Ni, Mn, U) in NABL accredited lab and submission of report from NABL lab

Construction of cement concrete platform of dimension 0.70 X 0.70 X 0.60 m (0.30 m above ground level) using concrete mix of 1:2:4 around the housing pipe welded with minimum 6 Nos. of anchoring plate as per drawing

Supply and fitting of well cap as per drawing with Allen Keys. MS Plate size 5 mm embossed & welded with permanent marking of “CGWB EW” for Exploratory Wells & "CGWB OW" for Observation Wells should be carved with welding on outer surface of casing pipe

Supply and installation of protection box made of GI sheet of 3.00 mm thickness along with Brass lock (7 lever hardened of branded item) and three keys/District wise Master Key for each lock as per drawing

Supply and installation of Display Board as per drawing

Preparation and submission of basic data report per site (includes EW and OW) in triplicate along with logging graphs, data sheets, analysis sheet, logging graphs, chemical analysis report from NABL lab, site location map and approachability with land marks, photographs and videos of activities of drilling, assembly lowering, gravel measurement and gravel packing, well development using compressor and well water discharge, pump lowering, pumping test (SDT, APT, PYT), water sample collection, well discharge with discharge measurement/orifice with manometer head, well site with display board, well cap, protection box for each EW site etc. The soft copy and hard copy should be submitted. Summary of well details in xls format including details of dia and depth of housing pipe, assembly pipe, screen pipe, static water level, aquifer parameters, safe discharge, gravel packing depth and thickness, chemical analysis result (basic parameters and heavy metals) etc. should be also submitted as detailed report.

Description of Work / Item(s)

Amount

Drilling of pilot hole using bentonite fluid for EW not larger than 216 mm (8 ½”) by rock roller/ drag bit including formation sample collection at every 3 m and change in formation, preparation and submission of litholog along with video recordings

Electrical logging using 406 mm and 1626 mm (16" and 64"), SP resistivity logging, Natural Gamma logging to target depth of minimum 300 m, submission of report including zone wise water quality and preparation of composite log along with video recordings

Enlargement of hole by reaming in EW to accommodate well assembly of recommended size and gravel envelop of minimum 100 mm thickness as given below

Using 508 mm (20”) RR Bit for 250 mm (10”) assembly pipe

Using 381 mm (15”) RR Bit for 150 mm (6”) assembly pipe

Drilling of Hole for OW by rock roller/ drag bit of size given below to accommodate well assembly of recommended size and gravel envelop of minimum 100 mm thickness, including sample collection and preparation of litholog along with video recordings

Using 381 mm (15”) RR Bit for 150 mm (6”) assembly pipe

Supply and installation of ERW casing pipe conforming to latest version of IS: 4270-2001 of diameter and thickness given below

250 mm (10”) Nominal Bore, pipe thickness 7.1 mm

150 mm (6”) Nominal Bore, pipe thickness 5.4 mm

Supply and installation of MS slotted pipes conforming to sizes as per Table 1 with slotting arrangement shown in Figure 2 of latest version of IS: 8110-2000 of dimensions given below

150 mm (6”) Nominal Size thickness 7 mm with slot opening size given below Slot opening 1.5 mm

Supply and shrouding of pea gravel conforming to latest version of IS: 4097-1967

Particle size range 3.35 mm to 4.75 mm for 1.5 mm slot opening

Cement sealing using 53 grade cement of 5 m thickness including 1 m thick fine sand/ clay between cement seal and gravel pack

Supply and filling up borehole/ annular space between casing pipe and bore hole wall with local clay, if required

Development by Air Compressor of adequate capacity for minimum 10 hours, over pumping and by other means till discharge water is clear and free of sand including collection of two water samples from OW adopting standard procedure in 1 litre HDPE bottle, along with video recordings of compressor hour meter, discharge etc.

Pumping test including pre pumping for 8 hours and 24 hours recuperation, SDT (for 300 minutes), APT (for 1000 minutes and 90% or full recovery) and collection of 4 Nos. of water samples using standard procedure for basic parameters per EW (in 1 litre HDPE bottle) and for heavy metals and submission of detailed report with data, graph sheet, analysis etc. along with video recordings

Preliminary Yield Test by lowering of pump in wells where SDT & APT is not being carried out - including collection of 2 Nos. water samples adopting standard procedure for basic parameters and heavy metals (in 1 litre good quality HDPE bottle) and submission of analysis report with data with video recordings

Chemical analysis of water samples for 15 parameters (pH, EC, TH, TDS, Ca, Mg, Na, K, CO3, HCO3, SO4, NO3, Cl, F & Fe) in NABL accredited lab and submission of report from NABL lab

Chemical analysis of water samples for Heavy Metals (As, Pb, Zn, Cu, Cr, Se, Ni, Mn, U) in NABL accredited lab and submission of report from NABL lab

Construction of cement concrete platform of dimension 0.70 X 0.70 X 0.60 m (0.30 m above ground level) using concrete mix of 1:2:4 around the housing pipe welded with minimum 6 nos. of anchoring plate as per drawing

Supply and fitting of well cap as per drawing with Allen Keys. MS Plate size 5 mm embossed & welded with permanent marking of “CGWB EW” for Exploratory Wells & "CGWB OW" for Observation Wells should be carved with welding on outer surface of casing pipe

Supply and installation of protection box made of GI sheet of 3.00 mm thickness along with Brass lock (7 lever hardened of branded item) and three keys/District wise Master Key for each lock as per drawing

Supply and installation of Display Board as per drawing

Preparation and submission of basic data report per site (includes EW and OW) in triplicate along with logging graphs, data sheets, analysis sheet, chemical analysis report from NABL lab, site location map and approachability with land marks, photographs and videos of activities of drilling, assembly lowering, gravel measurement and gravel packing, well development using compressor and well water discharge, pump lowering, pumping test (SDT, APT, PYT), water sample collection, well discharge with discharge measurement/orifice with manometer head, well site with display board, well cap, protection box for each EW site etc. The soft copy and hard copy should be submitted. Summary of wells details in xls format including details of dia and depth of housing pipe, assembly pipe, screen pipe, static water level, aquifer parameters, safe discharge, gravel packing depth and thickness, chemical analysis result (basic parameters and heavy metals) etc. should be also submitted as detailed report.