SANTIAGO WATER DISTRICT Tender

Description Supply Of Labor And Materials For The Drilling Of One (1) Production Well At Bañez St., Dubinan East, Santiago City - 1 Lot Work Includes: 1. Mobilization 2. Site Preparation And Setting Up Of All Equipment. 3. Drilling Of 200mm Diameter Pilot Hole Including Strata Sampling For Every Meter Of Penetration Or Less Whenever Change Of Formation Occurs And The Use Of Temporary Casings If Necessary. (200meters) 4. Soil Analysis, Water Bearing Strata Identification; Geophysical Borehole Logging (self-potential And Electrical Resistivity) And Preparation Of Final Well Design. 5. Reaming Of Pilot Hole From 200mm To 450mm Diameter Hole. (200 Meters) 6. Furnishing And Installation Of Casing And Screens Including Stick Up Pipe. A. 250mm Diameter Spiral Welded Steel Casing With Minimum Wall Thickness Of 6mm. Length= 6 Meter, Beveled Ends (158 Meters) B. 250mm Diameter Stainless Steel Continuous Slot Wedge Wire Wound Screens, Slot 60. Length=3 Meters (42 Meters) 7. Installation Of Casing And Screens Including Stick Up Pipe. (200 Meters) 8. Furnishing And Installation Of Gravel Pack Materials On Annulus Around Casings And Screens. (185 Meters) 9. Furnishing And Installation Of 50 Mm Diameter Gi Gravel Fill Pipe With Screw Cap. (16 Meters) 10. Mud Dispersion/thinning With Appropriate Dispersant /thinner 11. Well Development A. Jetting/backwashing (24 Hours) B. Surging And Bailing (12 Hours) C. Airlift (12 Hours) 12. Step-drawdown Pumping Tests With Five (5) Steps; At One (1) Hour Duration Per Step Carried Out At A Rate Increasing To The Expected Maximum Discharge Of 30 Lps 13. Continuous Constant Rate Discharge Pumping Test: Q=20lps To 30 Lps (72 Hours) 14. Cement Grouting Of Annulus Around 250mm Diameter Casing. (15 Meters) 15. Furnishing And Installation Of Well Head Cap And Sounding Pipe With Cap. 16. Water Quality Analysis. 17. Demobilization Including Site Clean-up.