Central Ground Water Board-CGWB has published Tender For For Construction Of Piezometers 1011 Nos In Soft Rock/ Hard Rock And Supply, Installation, Commissioning Of Dwlrs And Telemetry, Establishment Of Data Acquisition System And Its Maintenance For Real Time Ground Water Level Monitoring. Submission Date for this Tender is 16-05-2023. Computer Peripheral Tenders in faridabad Haryana. Bidders can get complete Tender details and download the document.
| Sr No | CorrigendumDate | Corrignedum | CorrigendumType | NewSubmissionDate |
| 1 | 27-Mar-2023 | Corrigendum -1 | Date | 27-04-2023 |
| 2 | 18-Apr-2023 | Corrigendum No. 2 | Technical Bid | 27-04-2023 |
| 3 | 27-Apr-2023 | Corrigendum 3 | Date | 08-05-2023 |
| 4 | 28-Apr-2023 | Corrigendum 3 (Revised) | Technical Bid | 08-05-2023 |
| 5 | 01-May-2023 | Corrigendum 4 | Technical Bid | 08-05-2023 |
| 6 | 09-May-2023 | Corrigendum No. 5 | Date | 16-05-2023 |
| Sl. No. | Item Description |
| 1 | Drilling of pilot holefor PZ using bentonite fluidnot larger than 216 mm (8 ½”) by rock roller/ drag bit including formation sample collection at every 3m and change in formation , preparationandsubmission of litholog along with video recording. |
| 2 | Electrical logging using 406 mm and 1626 mm (16" and 64") SP resistivity probe , Natural gamma loggingto traget depth of maximum 300 m , submissionof report including zone wise water quality ,logging graph, interpretation of graph composite log along with video recording. |
| 3 | Drilling of Holefor PZby rock roller/ drag bitof size given below to accommodatewell assembly of recommended size and gravel envelop of minimum 100 mm thickness,including formation sample collection at every 3m and change in formation , preparationandsubmission of litholog along with video recording. |
| 4 | Using 381 mm ( 15”)RR Bit for 150 mm (6”)assembly pipe |
| 5 | Supply and installation of ERW casing pipe conforming to Table 3 of latest version of IS: 4270-2001 |
| 6 | 150 mm (6”) Nominal Bore, thickness 5.4mm |
| 7 | Supply and installation of LCGV- wire screen conforming to latest version of IS: 8110-2000 of dimensions given below |
| 8 | 150 mm (6”) Nominal Size thicnkness 7mm with slot opening size 1.0 mm |
| 9 | Supply and shrouding of pea gravel conforming to latest version of IS: 4097-1967 |
| 10 | Particle size range 2.00 mm to 3.35 mm for 1.0 mmslot opening |
| 11 | Supply and filling up borehole/ annularspace between casing pipe and bore hole wall withclay balls |
| 12 | Development by Air Compressor of adequate capacity forminimum 5 hoursandby other means till discharge water is clear and free of sand and PYT test (100 min) including collection of 4water samples (two each for Basicand Heavy metals)from PZ adopting standard procedure in 1 litre HDPE bottle. |
| 13 | chemical analysis of water samples for 15parameters pH, EC, TH,Ca, Mg, Na, K, CO3, HCO3, SO4, NO3, Cl, F, PO4 & Si in NABL accredited labs and submission of report from NABL lab |
| 14 | Chemical analysis of water samples for Heavy metals (As & U) in NABL accredited labs and submission of report from NABL lab |
| 15 | 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 of1:2:4around the housing pipe welded with minimum6Nos of anchoring plate as per drawing |
| 16 | Supply and fitting of well cap as per drawing with Allen Keys.MS Plate size 5 mmembossed & welded with permanent marking of “ CGWB PZ” for Piezometer wells should carved with welding on outer surface of casing pipe 0.5mtrs |
| 17 | Supply and installation of protection box made of 3.13 mm GI sheet of size: 650 mm X 550 mm X 530mmalong with Brass lock (7 lever hardened) and three keys for each lock. |
| 18 | Supply and installation of Display board |
| 19 | Preparation and submission of basic data report per PZ in triplicatealong with logging graphs, data sheets, analysis sheet,logging graphs ,Well Diagram, chemical analysis report from NABL lab, site location map and approachability with land marks, photographs/ videos of activities of drilling, assembly lowering,gravel measurement and gravel packing, well development using compressor and well water discharge, PYT,water sample collection, welldischarge with discharge measurement/orifice with manometer head,well site with display board well cap, protection box activityfor each PZ, etc.The soft copy as well as hard copy should be submitted. Summary of wells details in xls format including details of dia and depth, housing pipe, assembly pipe, screen pipe, static water level, TDS, aquifer parameter, safe discharge, grvael packing depth and thickness etc. should be also submitted. |
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