Tenders Are Invited For Constructing Two Production Wells At The Water Treatment Plant In Wielka Łąka As Part Of The Investment Project Titled Construction Of Exploitation Holes At Water Treatment Plants

1. Description Of The Subject Of The Order: Construction Of Two Production Wells At The Water Treatment Station In Wielka Łąka As Part Of The Implementation Of The Investment Project Titled Construction Of Exploitation Holes At Water Treatment Plants In The Kowalewo Pomorskie Commune.2. The Task Will Be Located On Plots With Geod. No. 1/13 And 32/9, Registry District: Wielka Łąka, Kowalewo Pomorskie Commune, Golubsko-Dobrzyński Poviat, Voivodeship. Kuyavian-Pomeranian Voivodeship, Area Of ​​The Water Treatment Plant In Wielka Łąka. The Task Is Based On The Geological Works Project Approved By The Marshal Of The Kuyavian-Pomeranian Voivodeship On February 20, 2026 (Decision No. Śg-V.7430.7.2026), Authored By Ms. Małgorzata Czyżewska Usługi Hydrogeologiczne Czyżewska Małgorzata Ul. Szubińska 54, 87-100 Toruń. 3. The Ordering Party Reserves The Right To Stage The Task, Which Includes, Among Others: 1) Drilling Two Production Wells To A Depth Of Approximately 60.0 M In Accordance With The Geological And Technical Design Presented In Graphic Annexes No. 8 And 8A And The Description In Chapter 6.1; Based On The Geological Design, It Is Commissioned To Drill Production Well No. 4 Using The Percussion Method. Drilling Will Be Carried Out In A Column Of Pipes Ø 508 Mm To A Depth Of 58.0 M Above Ground Level. The Filter Column Should Be Placed At A Depth Of 58.0 M Below Ground Level. 250/280Mm, Length 9.0 M (1X 6.0M+ 3.0M) With Loose Gravel, Matched To The Granulation Of The Layer - Overfilter Pipe: Pvc, K, Ø 250/280Mm, Length 21.0M - Reduction: Pvc, K, Ø 250/300 Mm, Length 0.5M - Pipe Above-Filter: Pvc, K, Ø 300/350 Mm, Led Out To The Area, 26.5 M Long + 0.4 M Above Ground. Guides Should Be Installed Around The Perimeter Of The Filter Column To Ensure Central Positioning Of The Filter In The Hole. After Filtering The Hole, The Space Between The Overfilter Pipe And The Rock Mass Will Be Filled With A Gravel Seal At A Depth Of 48.0-27.0 M Below Ground Level. Then, Sealing Will Be Made Using Compactonite At A Depth Of 00-27.0 M Above Ground Level. The Final Structure Of The Borehole: The Depth Of The Filter Column, The Length Of The Working Part Of The Filter, The Width Of The Gap And The Thickness Of The Backfill Will Be Determined By The Geological Supervision Based On The Results Of Granulometric Tests Of The Aquifer. Drilling Will Be Performed In A Column Of Ø 508 Mm Pipes To A Depth Of 60.0 M Below Ground Level. The Filter Column Should Be Placed On A 1.0 M Gravel Pad At A Depth Of 59.0 M Above Ground Level. The Filter Is Designed With The Following Structure: - Under-Filter Pipe: Pvc, K, Ø 250/280 Mm, Length 2.0 M - Actual Filter: Pvc, K, Slotted With A Continuous Slot, Ø 250/280Mm, Length 15.0 M (3.0M +2 X6.0M) With Loose Gravel, Matched To The Granulation Of The Layer - Superfilter Pipe: Pvc, K, Ø 250/280Mm, Length 14.0M - Reduction: Pvc, K, Ø 250/300 Mm, Length 0.5 M - Overfilter Pipe: Pvc, K, Ø 300/350 Mm, Led Out To The Area, Length 27.5 M + 0.4 M