Tenders Are Invited For Biormediacation Of The Water Reservoir At The Recreation And Recreation Center In Mikorzyna - Stage Ii

1. The Subject Of The Contract Is Bioremediacation Of The Water Reservoir At The Recreation And Recreation Center In Mikorzyna - Stage Ii. 2. The Task Includes Conducting A Cycle Of Microbiological Bioremediacation In Situ In One Of The Tanks (Medium Pond) With An Area Of 1.684 Ha Of Water In Order To Improve Its Natural Values And Recreational Function. 1) The Contractor Is Obliged To Present The Contracting Authority Of The Work Schedule Within 7 Days From The Date Of Signing The Contract. Water Samples And The Thickness Of The Bottom Sediment. The Map With Marked Measuring Points Must Be Delivered To The Ordering Party By August 31, 2025.3) The Contracting Authority, Before The Contractor Starts Work, Requires Measurements Of The Amount Of Silt And Taking Water Samples For Testing (General Nitrogen, General Phosphorus, Oxygen Dissolved At The Surface And In The Bottom Zone, Ph). Zero Tests And Water Samples Are Taken By Commission Before Starting Work. The Measurements In Question Are To Be Used As Output Data For Subsequent Tests. The Tests Are To Be Performed By An Independent Laboratory At The Contractors Expense By August 31, 2025.4) At Least Double Applications Of The Microbiological Preparation - The Last Application Until October 18, 2025. Expected Biological Effects: A) Reduction Of Organic Bottom Sediments By An Average Of At Least 30% Within 12 Months Of Starting Work Without The Use Of Mechanical Devices And Chemicals; B) Liquidation Of Putrefactive Odors From The Reservoir Within 3 To 5 Days Of The Completion Of Application Work; C) Improvement Of The Oxygen Conditions Of The Tank In The Additive Zone With A Minimum Of 1 Mg/L .5) Control Of The Amount Of Silt And Water Monitoring Tests (General Nitrogen, General Phosphorus, Oxygen Dissolved At The Surface And In The Bottom Zone, Ph). Control Tests And Water Sampling Should Be Carried Out By Commission By October 31, 2025. The Tests Are To Be Performed By An Independent Laboratory.6) To Confirm The Ecological Effect, The Contracting Authority Requires Measurements Of Final Amount Of Silt And Research On Water Status Monitoring (General Nitrogen, General Phosphorus, Oxygen Dissolved At The Surface And In The Bottom Zone, Ph) After 12 Months From The Last Application Of The Preparation. Re -Examination Of Water Verifying The Effects Of Work Should Be Performed Under Similar Weather Conditions (In The Same Summer When The Season, The Water And Air Temperature Are The Same Or Similar). The Tests Are To Be Performed By An Independent Laboratory At The Contractors Expense Until October 18, 2026.I. Place Of Performance Of The Subject Of The Contract. The Operation Will Be Carried Out At The Recreation Center In Mikorzyna, On Record Plots Marked With Geodetic Numbers No. 973/93 And 35/7, Located In The Protected Landscape Area Wzgórza Ostrzeszów And Odolan Kotliny. Waters From A Natural Watercourse - Zaleski Ditch, Including A Small Pond With A Total Area Of 0.4720 Ha, 2.3870 Ha Large Pond

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Global Tender Document	Tender Notice