Tenders Are Invited For Execution Of A Deep Well With Casing At The Water Treatment Plant In Siekierki Wielkie

The Subject Of The Contract Is The Construction Of Well Hole No. 4 At The Municipal Groundwater Intake From Neogene Formations In Accordance With The Geological Works Project Of August 2020 (Developed By The Company: Bartosz Owwczarczak And Michał Krzyżanowski Aquametr S.C.). Execution Of Well No. 4 Is Intended To Ensure That It Functions Within The Established Resources Of The Intake. The Well Bore Should Be Located Within The Plot With Registration Number No. 371/16, Siekierki Wielkie Precinct. The Order Provides For The Performance Of Geological Works And Works, In Accordance With The Documentation Held By The Employer, Referred To Above, Including In Particular: Rotary Or Impact Method Using A Drilling Device. Quaternary Formations To A Depth Of 10.0 M Should Be Drilled Using A Pipe Auger Or Drill Bucket In 508 Mm - 20 In Pipes. Further Drilling Should Be Carried Out In Rotation With A Ø 470 Mm, Ø 370 Mm, And Ø 330 Mm Cutter Bit With The Left Circulation Of The Mud. In The Hole, Install Ø406 Mm Steel Pipes To A Depth Of 50.0 M And Ø356 Mm Pipes To A Depth Of 93.0 M, Which Will Remain As A Timber Pipe. The Well Should Be Filtered With A Permanent Filter According To Din 4925 Pcv-U Type Kkv Dn 175 (Ø195/227 Mm) With A Length Of 59.0 M. Operation The Well Should Be Drilled To The Miocene Aquifer, The Top Of Which Is At A Depth Of 93.0 M. Drilling Should Be Completed At A Depth Of 130.0 M With A Final Diameter Of Ø 330 Mm. The Filter Column Should Be Placed On A Sand Bed At A Depth Of 129.0 M. The Aquifer Is Planned To Be Contained As Follows: • Pvc-U Under-Filter Pipe, Type Kkv Dn 175 (Ø195/227 Mm), 3.0 M Long, • Pvc Lining Filter -U Type Kkv Dn 175 (Ø195/227 Mm) With A Working Length Of 28.0 M, Lining 0.7-1.2 Mm, Slot Width 0.75 Mm, Powder Coating 0.8-1.4 Mm, • Over-Filter Pipe Pvc-U Type Kkv Dn 175 (Ø195/227 Mm) With A Length Of 28 M, • Closure Of The Opening Until The Lining Is Made In The Form Of A Hood Made Of Steel Pipes Ø 356 Mm, B) Closing Of Aquifer Horizons, In Accordance With The Geological Works Design.C ) Execution Of Purification And Measurement Pumping In Accordance With The Geological Works Design. D) The Pump For Test Pumping Will Be Provided By The Works Contractor. E) Method Of Draining Water Pumped Out In Accordance With The Geological Works Design. G) Testing The Borehole And Handling The Samples, In Accordance With The Geological Works Design. H) Execution Of Thermal Insulation Housing Of The Water Line Type Well In White, On A Reinforced Concrete Slab. Complete Casing Dn 100, Made Of Stainless Steel Fittings, Equipped With, Among Others, A Regular Water Meter, Automatic Additional Heating, Hermetic Junction Box, Casing Opening/Closing Sensor, Water Intake Tap, Internal Gasket, Opening/Closing Assist Mechanism, Outlet With A Ball Valve For A Fire Hose With A Diameter Of Dn32, A Ventilation System With A Mesh Protecting Against Insects, A 230 V Service Socket, Internal Led Lighting, A Handle For Lifting The Housing. The Employer Requires The Delivery Of Hygienic Certificates And Declarations Of Conformity For Equipment Elements. They Will Be Used To Determine The Hydrogeological And Operational Parameters Of The Hole.