Central Ground Water Board-CGWB has published Construction Of Piezometers 1612 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 Piezometer overburden by rock roller/drag/button bit to accommodate casing pipe (6" &7" diameter), including sample collection , preparation and submission of Litholog in1 litre good quality HDPE bottle. |
| 2 | Supply and installation of ERW casing pipe conforming to Table 3 of latest version of IS: 4270-2001 Supply and installation of ERW casing pipe conforming to Table 3 of latest version of IS: 4270-2001 |
| 3 | 152.4 mm (6") Nominal Bore |
| 4 | 152.4 mm (7") Nominal Bore |
| 5 | DrillingofPiezometerbottombyDTHmethod using appropriate sizes of button bits so as to reachtargeteddepthwithdiameterofholenot less than 160 mm at 100 m depth and final diameter not less than 152 mm at holebottom including measurement of discharge through V-notch at various stages (depth) of drilling, collection of water sample for each aquifer formation/fracture zone encounteredadopting standard procedure,formationsample collection atevery 3meterintervals preparationand submission of litholog, discharge measurementetc. |
| 6 | Aftercompletion ofdrillingdevelopment of well with air compressor for one hour, collection of 2 bottles (1 treated with acid) of watersample (1liteach)for submissionto CGWB |
| 7 | Caliper logging, submission of logging graph, report along with video recordings |
| 8 | Chemical analysis ofwatersamplesfor15 parameters Ph, EC, TH, TDS, Ca, g, Na, K, CO3, HCO3, SO4, NO3, Cl, F, & Fe, in NABL accredited labs and submission from NABL lab |
| 9 | Chemical analysis of water samples for Heavy metals Arsenic (As), UTanium (U), Lead (Pb), Manganese (Mn), Nickel (Ni), Zinc (Zn), Copper (Cu), Chromium (Cr), and selenium (Se). in NABL accredited labs and submission from NABL lab |
| 10 | Construction of cement concrete platform of dimension 0.70 X 0.70 X 0.60 m (0.30m above ground level) using concrete mixof 1:2:4 around the around the Piezometers well welded with minimum 6 Nos. of anchoring plate as per drawing. |
| 11 | Supply and installation of protection box made 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 with well cap |
| 12 | Supply and fitting of well cap as per drawing with Allen Keys. MS Plate size 5 mm embossed & welded with permanent marking of " CGWB Pz’ should be carved with welding on outer surface of casing pipe AGL 0.5 mtrs |
| 13 | Preparation and submission of basic data report per site for each Pz in triplicate along with logging graphs, data sheets, analysis sheet, chemical analysis from NABL lab, photographs/video of activity drilling assembly lowering V-notch discharge atvarious depth of drilling, with well discharge, water sample collection, display board well cap, protection box etc. The soft copy should be submitted |
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