Central Ground Water Board

Central Ground Water Board has published Tender For Construction Of 17 Piezometer Wells In Rajasthan ( Rj Pz Boq 1 ( Soft Rock 100 M ) ) ; 1 Drilling Of Pilot Holefor Pz From 228.60 Mm ( 9 - 7 / 8” Rr Bit ) And Enlargement Of Borehole By 342.90Mm ( 13 ½” ) By Rock Roller / Drag Bit To Accommodate 150Mm ( 6” ) Dia Well Assembly And Recommended Size Of Pea Gravel Envelop Of Minimum 100 Mm Thickness And Sample Collection And Preparation Of Litholog 2 Electrical Logging Using 406 Mm And 1626 Mm ( 16 And 64 ) Sp Resistivity Probe, Natural Gamma Logging To Target Depth Of Max.100 M, Submission Of Report Including Zone-Wise Water Quality, Logging Graph, Interpretation Of Graph, Generation Of Composite Log Along With Video Recording 3 Supply And Installation Of Erw Casing Pipe Conforming To Latest Version Of Is: 4270-2001Of Diameter And Thickness Given Belowalong With 3Meter Bail Plug 4 150 Mm ( 6” ) Nominal Bore, Thickness 5.4 Mm 5 Supply And Installation Of Lcgv- Wire Screen Conforming To Latest Version Of Is: 8110-2000 Of Dimensions Given:150 Mm ( 6” ) Nominal Size Thicnkness 5.4Mm With Slot Opening Size Given Below 6 Slot Opening 0.75 Mm ( Stainless Steel Ss304 Grade ) 7 Supply And Shrouding Of Pea Gravel Confirming To Latest Version Of Is: 4097-1967 8 Particle Size Range 2.00 Mm To 4.00 Mm For 0.75 Mm Slot Opening 9 Supply And Filling Up Borehole / Annularspace Between Casing Pipe And Bore Hole Wall With Local Clay, If Required After Development By Air Compressor Upto Atleast 30 Meters Of Slot ( As Per Site Conditions ) 10 Development By Air Compressor Of Adequate Capacity Forminimum 5 Hours, Over Pumping Andby Other Means Till Discharge Water Is Clear And Free Of Sand Including Collection Of Twowater Samples From Pz Welladopting Standard Procedure In 1 Litre Hdpe Bottle, Along With Video Recordings Of Compressor Hour Meter, Discharge Etc. 11 Chemical Analysis Of Water Samples For 15Parameters Ph, Ec, Th, Tds, Ca, Mg, Na, K, Co3, Hco3, So4, No3, Cl, F & Fe In Nabl Accredited Labs 12 Chemical Analysis Of Water Samples For Heavy Metals ( As, U ) In Nabl Accredited Labs And Submission Of Report From Nabl Accredited Lab 13 Construction Of Cement Concrete Platformof Dimension 0.70 X 0.70 X 0.60 M ( 0.30 M Above Ground Level ) Using Concrete Mix Of1:2:4Around The Around The Piezometer Well Welded With Minimum6nos Of Anchoring Plate As Per Drawing 14 Supply And Fitting Of Well Cap As Per Drawing With Allen Keys.Ms Plate Size 5 Mmembossed & Welded With Permanent Marking Of “ Cgwb Pz” Should Be Carved With Welding On Outer Surface Of Casing Pipe 15 Supply And Installation Of Protection Boxmade Of 3 Mm Gi Sheet Of Size: 550Mm X450mm X530mm Along With Brass Lock ( 7 Lever Hardened ) And Three Keys For Each Lock As Per Drawing 16 Supply And Installation Of Display Board As Per Drawing 17 Preparation And Submission Of Basic Data Report Per Site In Triplicatealong With Data Sheets, Analysis Sheet, Chemical Analysis Report From Nabl Lab, Site Location Map And Approachability With Landmarks, Photographs And Videos Of Activities Of Drilling, Assembly Lowering, Gravel Measurement And Gravel Packing, Well Development Using Compressor And Well Water Discharge, Water Sample Collection, Welldischarge With Discharge Measurement, Well Site With Display Board, Well Cap, Protection Box For Each Site, Etc.The Soft Copy As Well As Hard Copyshould Be Submitted. Summary Of Piezometer Details In Xls Format ( As Per Proforma Given By Cgwb ) Including Details Of Dia And Depth Of Assembly Pipe, Screen Pipe, Static Water Level, Gravel Packing Depth And Thickness, Litholog Etc. Shouldbe Also Submitted.. Last date of submission for this tender is 2023-08-31. This is a Bottles tender in Faridabad, Haryana