Tenders Are Invited For Drilling And Exploration Work – Construction Of Four Piezometers In The Protection Zone Of The University Of Warsaw Osowa In Gdańsk

Drilling And Exploration Work – Construction Of Four Piezometers In The Protection Zone Of The University Of Warsaw Osowa In Gdańsk. The Subject Of The Order Includes The Construction Of Four Piezometers As Above. In Accordance With The Documentation Entitled Design Of Geological Works For The Construction Of Four Observation Wells (Piezometers) P-5, P-6, P7, P8 For The Purposes Of Expanding The Existing Network To Monitor The Dynamics Of The Lower And Upper Aquifer Levels In The Quaternary Formations In The Protection Zone Of The Osowa Water Intake. Scope Of The Order: Piezometer P5 And P6, 70.00 M Deep Each - Drilling Using The Drilling Bucket Using The Percussion Method In The Cover Of Two Pipes With Diameters: Ø 356 Mm To A Depth Of 35.0 M And 240/250 Mm To A Depth Of 70.0 M. Pvc Slot Filter Pn12.5 With An Outer Diameter Of 140 Mm. P7 Piezometer With A Depth Of 115.0 M - Drilling Using The Drilling Bucket In The Cover Of Medium Pipes: Ø 406 Mm To A Depth. 55.0M, Ø 356Mm To A Depth Of 95.0M And Ø240mm To A Depth Of 120.0M. Pvc Slot Filter Pn12.5 With An External Diameter Of 140Mm. P8 Piezometer With A Depth Of 120.0M - Drilling Using The Drilling Bucket In The Cover Of Medium-Sized Pipes: Ø 406Mm To A Depth Of 50.0M, Ø 356 Mm To A Depth Of 90.0 M And Ø 240/250 Mm To A Depth Of 115.0 M. Pvc Slot Filter Pn12.5 With An External Diameter Of 140 Mm. The Detailed Location Of The Designed Piezometers Is Presented In The Graphic Attachments In The Above-Mentioned Project The Necessary Surveying And Laboratory Works Should Be Carried Out In Accordance With Points 6 H, 6 And P8/F06 In The Above-Mentioned Project (Use Of Stainless Steel Screws At Least 70.0 Cm Above The Ground Level. Housing With Permanent Marking Of The Piezometer Number P5/F06, P7/F06, P7/F06). 3/9. Note: For Piezometers P6 And P7, A Standard Casing For Piezometers Can Be Used. For Piezometers P5 And P8, A Black Casing For An Electric Post With A Flat Finish On The Top Of The Post Should Be Used - Annex 4. Geological Works Will Be Carried Out Under The Supervision Of A Person With Appropriate Geological Qualifications In Accordance With The Regulation Of The Ministry Of Environmental Protection Of 16/12/2011 On Qualifications In The Field. Geology Indicated By The Ordering Party. Ultimately, The Structure Of The Hole And The Filter Will Be Determined By The Geological Supervision After Determining The Actual Lithological Profile Of The Hole. The Decision On The Final Construction Of The Piezometer And The Granulation Of The Fill Will Be Made Based On The Data Obtained During Drilling And The Results Of Granulometric Tests.