Public Works Department-PWD has published Tender For Maintenance Of Water Supply System Supplying And Replacement Of Old Filter Media Sand Of 10 Mld Pressure Filter Plant Filter Shells Under Wtp Sdi Wdix Phe Pwd At Cuelim Cansaulim Goa. Submission Date for this Tender is 29-09-2023. Water Supply Project Tenders in South Goa Goa. Bidders can get complete Tender details and download the document.
| Sl. No. | Item Description |
| 1 | Supplying of Filtersand of size conforming to the IS specification with latest amendments suitable for Rapid gravity sand filter media (sand) conforming to the IS specification with latest amendments suitable for Rapid gravity sand filter for treating water in treatment plants with following specification as perthesizes as given below:- |
| 2 | a. Effective size- 4.50mm to 0.70mm |
| 3 | b. Uniformity Co-Efficient- 1.30 to1.70 |
| 4 | c. Specific gravity - 2.55 |
| 5 | d. Silica content more than- 90% |
| 6 | e. Acid Solubility less than - 5% |
| 7 | f. Loss on ignition less than- 1.5% |
| 8 | Supplying of grit media of size 2mm to 6mm suitable for rapid gravity sand filters as desired by the department. |
| 9 | Supplying of gravel mediasuitable for rapid gravity sand filter mediaas desired by the department of following size |
| 10 | a) 6mm to 12mm |
| 11 | b) 12mm to 38mm |
| 12 | Removal of existing old sand/ grit/ gravel/ pebbles, etc. media from filter beds and disposal of same upto a distance of 100 mts. |
| 13 | Laying of new filter media sand grit, gravel, pebble in filter beds as designed by the department including cost of cleaning nozzles, etc. complete. |
| 14 | Supplying at store or site of work Rigid PVC (SEL FIT) pipes for public water supply including Railway freight, carting, loading and unloading, stacking, transit insurance etc. complete, conforming to IS: 4985-2000, and bearing ISI mark, Class 10 kg/cm2. |
| 15 | Outer Dia in mm |
| 16 | a) 63 |
| 17 | Supply of rigid PVC fittings conforming to IS: 7834-1975 designed for precision and accuracy so as to join PVC pipes and other specials including railway freight, carting, loading and unloading and stacking etc. complete. |
| 18 | ENDCAP ( Plain ) |
| 19 | Dia in mm |
| 20 | PN 6 (6 kg/cm2) |
| 21 | a) 63 |
| 22 | Male Threaded Adaptor |
| 23 | Outer Dia in mm |
| 24 | a) 63 |
| 25 | Conveying carefully from stack at site, 250m from both sides rolling and lowering in trenches, layingtrue toline and level and perfect linking forjoints for P.V.C / H.D.P.E complete in all respects as per the direction of the engineer in-charge. |
| 26 | a) 63mm OD |
| 27 | Providing & laying cement concrete 1: 1.5: 3(1 cement: 1.5 coarse sand: 3 graded granitic or basaltic stone aggrt. 20 mm. nominal size) excluding cost of centering, shuttering and finishing in: |
| 28 | All works upto plinth level |
| 29 | TRANSPORTATION AND CARRIAGE OF MATERIALS |
| 30 | ( i ) Sand stone metal below 40 mm ( upto 5Kms ) |
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