construction of 120 nos. Exploratory Wells (80 EW in Andhra Pradesh 40 EW in Karnataka) and 29 nos. Observation Wells (19 OW in Andhra Pradesh 10 OW in Karnataka)

Amount

Drilling of overburden by rock roller/ drag/ button bit to accommodate 175 mm (7”) Nominal Bore casing pipe including sample collection , preparation and submission of litholog with video recordings,in 1 litre good quality HDPE bottle

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

175 mm (7”) Nominal Bore

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 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 discharge and V notch readings, lithlog samples.

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), APT for 1000 minutes and 90% or full recovery) and collection of 4Nos water sample adopting standard procedure for basic parameter and heavy metals in 1 litre good quality HDPE bottle along with video recordings.

Preliminary yield test 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.

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, Pb, Cd, Ni 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 3.15mm 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 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

200 mm (8”) 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 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 / V notch readings, lithlog samples and pull out of entire rods after completion of target depth of drilling

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

Natural gamma logging submission of logging graph, report along with video recordings

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), APT for 1000 minutes and 90% or full recovery) and collection of 4Nos water sample adopting standard procedure for basic parameter and heavy metals in 1 litre good quality HDPE bottle along with video recordings.

Preliminary yield test 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.

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

Reaming with rock roller/ drag/ button bit as appropriate to accommodate part assembly as given below

Supply and installation of ERW casing pipe(for part assembly conforming to latest version of IS: 4270-2001. The part assembly pipe should be lowered by using reverse socket through drill string. Video of lowering part assembly should also to be submittted.

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

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,Pb,Cd,Zn,As 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 3.15mm 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 also 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.

Matheswaran R

PRB Infraprojects Private Limited

PRB Infraprojects Private Limited

ANNAPURNA BOREWELLS