Central Ground Water Board-CGWB has published Tender For Construction Of Piezometers 1004 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 hole for PZ not larger than 216mm (8 1/2 “ by rock roller/ drag bit including sample collection and preparation of litholog |
| 2 | Electrical Logging using 406mm and 1626mm (16"" and 64""), SP registivity probe and Natural Gamma logging, preparation of litholog,submission of report including zone wise water quality along with logging graphs, composite log etc. |
| 3 | Enlargement of hole by reaming in PZ to accommodate well assembly of recommended size and gravel envelope of minimum 100 mm thickness as given below |
| 4 | Using 250 mm (10") RR Bit for 100 mm(4”) assembly pipe (for 50m depth Pzs) |
| 5 | Supply and Installation of ERW casing pipe conforming to Table 3 of latest version of IS: 4270-2001 of diameter and thickness given below |
| 6 | 100mm (4”) Nominal Bore thickness 5.4mm |
| 7 | Supply and installation of LCG V- wire screen conforming to latest version of IS: 8110-2000 of dimension given below |
| 8 | 100mm (4”) Normal Size thickness 7mm with slot opening size 1.0 mm |
| 9 | Supply and shrouding 01 pea gravel confirming to Latest version of IS: 4097-1967 |
| 10 | Particle size range 2.00 mm to 4.5 mm for 1.0 mm and 0.75 mm slot opening |
| 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 and submission of reports |
| 12 | chemical analysis of water samples for Heavy metals _Arsenic & Uranium in NABL accredited labs and submission of reports |
| 13 | Deployments by Air Compressor of adequate capacity for minimum 5 hours till discharge water is clear and free of sand including collection of water samples from PZ. Collection of Water samples asper prescribed format mentioned below. |
| 14 | Construction of Cement concrete platform 0.7*0.7*0.6 m (0.3 m above ground level) using concrete mix of 1:2:4 around the pipe welded minimum 6 ns of anchoring plate asper drawing |
| 15 | Supply and installation of display board asper drawing |
| 16 | Supply and installation of protection box along with brass lock (7lever hardened) and three keys for each lock asper drawing |
| 17 | Preparation and submission of basic data report per sitein triplicatealong 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, water sample collection during compressor development, welldischarge with discharge measurement via V-Notch,well site with display board well cap, protection box activityfor each Pz 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, Lithologetc shouldbe also submitted. |
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