Subject Of The Order: In The Area Of The Municipal Groundwater Intake In The Town Of Prosna, Budzyń Commune, Chodzież District, On Plot No. 159/15, Prosna District, It Is Planned To Drill A Hydrogeological Well - Well No. 3, In Order To Supply Water To The Municipal Water Supply For The Municipal Water Supply And Sewerage Plant In Budzyń. The Hole Should Be Made With A Drill Set For Impact Drilling, Without The Use Of Drilling Mud. The Depth Of The Designed Hole Will Be Approximately 66.0 M, Which Is Planned To Be Reached In The Protection Of Two Columns Of Drill Pipes, Steel Ф 508 (To A Depth Of 27.0 M) And The Final One Ф 457 Mm (To A Designed Depth Of Approx. 66.0 M). The Columns Of Drill Pipes Used For Drilling, I.E. Ф 508Mm And 457Mm, Will Be Pulled Out Of The Hole After Filtering The Hole With A Filter Column And Carrying Out Test Pumping. It Is Planned To Install A Filter Column Made Of Pvc-U Type K Pipes In The Hole At A Depth Of Approx. 66.0 M, With The Following Structure: • Under-Filter Pipe Dn 300 (Ф External 330 Mm), 3.0 M Long, • Mesh Filter Dn 300 (Ф External 330 Mm), 18.0 M Long, • Over-Filter Pipe Dn 300 (Ф External 330 Mm) 45.0 M Long. A Gravel (Sand) Backfill Should Be Made Around The Filter With A Granulation Appropriate To The Grain Size Of The Aquifer Captured. After Filtering The Hole, Test Pumping (Purification And Measurement) Will Be Carried Out According To The Following Scheme: • Purification Pumping, In Bursts For The Period Necessary To Completely Clean The Water From Mineral Suspensions, It Is Estimated That The Total Duration Of This Pumping Will Last 12 - 24 Hours, • Disinfection Of The Hole And A 24-Hour Technological Break For Disinfection And Stabilization Of The Water Table, • Measurement Pumping (Parametric), Single-Stage With A Capacity Of Approx. 50.0 M3/H For Approx. 24 - 48 Hours, • 24-Hour Technological Break For Measurements Of The Elevation Of The Water Table. At The End Of The Measurement Pumping Of The Hole No. 3, Water Samples Should Be Taken For Physical, Chemical And Bacteriological Tests. Reinforcement Of The Borehole - Well No. 3 With An Above-Ground Well Casing Of The Lange Type (Made Of Polyester-Glass Laminate) With Complete Measuring And Safety Fittings With A Diameter Of 100 Mm, A Well Head And Automatic Heating. A New Submersible Pump Will Be Installed In Well No. 3 (With A Capacity And Lift Appropriate To The Obtained Results After Test Pumping), On Pressure, Flanged Pipes With A Diameter Of 100 Mm, Along With A Pipe For Measuring The Water Level.
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