The subject of the public contract is the remediation of historical ecological burdens in the area of Mníšek pod Brdy – Dump, Bažantnice and surroundings, including the preparation of necessary implementation (project) documentation.
Historical ecological burden originates from the former operation of the KOVOHUTĚ Mníšek pod Brdy plant. It was created as a result of long-term deposition of wastes from metallurgical production and the gradual leaching of heavy metals and salts. The long-term process of leaching this contamination has led to permanent degradation of the adjacent biotope (so-called Bažantnice) and salinization of several other sites, household wells, or monitoring boreholes. The local fishery association's breeding pond is also at risk.
The construction site is located in the cadastral area of Mníšek pod Brdy (697621). It covers an area of approximately 60,000 m2, situated about 3 km east of the center of Mníšek pod Brdy, and borders the area of the former Kovohutě from the east to the southeast. The planned remediation will concern plots with parcel numbers 1965/28, 1965/27, 1965/112, and possibly also 1966/1, 1965/105, 2070/5, and 2070/6, if scattered waste from the dump is found on the land of these plots. The northern edge of Bažantnice is bordered by the waste dumps from the metallurgical production, including a vanadium tailings pond (and a larger part later used as an Al sludge dump), with southern solid waste dumps following — to the east the so-called old dump (primarily wastes from aluminum production) and to the west a dump of vanadium and ferrovandate slags, which has already been largely removed. The Bažantnice site, including the reclaimed Al sludge dump, vanadium tailings pond, and Al sludge dump, is located to the east of the Kovohutě operation halls. To the north and east, there is managed agricultural land, the Kovohutě area is fenced off to the west. To the south, there is a partially wooded area known as Bažantnice, bordered by the City Stream. To the southeast, Bažantnice borders the Sýkorník pond.
Remediation works are expected to include cleaning the area of the remedial lagoon, demolishing the sumps in the dumps, dismantling concrete panels, subsequently dividing the lagoon into eastern and western parts via a dividing dike, and implementing a seal at the bottom of the eastern lagoon to prevent contamination of groundwater. The project also envisions relocating all contaminated waste from the western part of the lagoon to a sealed space that will subsequently be covered with geomat and bentonite/foil sealing, which will be functionally connected to the lower insulating layer. Terrain modifications and technical and biological reclamation are also expected to be performed around the sealed lagoon.
During the remediation works, the development of concentrations of individual contaminants will be monitored at selected monitoring sites, wells, boreholes, and in surface water. The monitoring system of the existing area will be checked, and unnecessary objects will be removed. Given the nature of the contamination and the remediation intervention, the project will not end directly with an updated risk analysis, but rather with long-term monitoring of the concentration development of contaminants in the vicinity of the remediated and reclaimed area. The monitoring will track pH, conductivity, the presence of ions Ca, Na, Al, Co, Cu, Fe, Mn, Mo, Ni, Se, Sb, Be, Zn, Pb, the presence of V (variable oxidation states), BIII and CrVI in compounds, total CN, CHSKMn, F-, NO2-, NO3-, Cl-, SO42-, and NH4+.

LOT-0001
Remediation – Mníšek pod Brdy – Dump, Bažantnice and Surroundings.
The subject of the public contract is the remediation of historical ecological burdens in the area of Mníšek pod Brdy – Dump, Bažantnice and surroundings, including the preparation of necessary implementation (project) documentation.
Historical ecological burden originates from the former operation of the KOVOHUTĚ Mníšek pod Brdy plant. It was created as a result of long-term deposition of wastes from metallurgical production and the gradual leaching of heavy metals and salts. The long-term process of leaching this contamination has led to permanent degradation of the adjacent biotope (so-called Bažantnice) and salinization of several other sites, household wells, or monitoring boreholes. The local fishery association's breeding pond is also at risk.
The construction site is located in the cadastral area of Mníšek pod Brdy (697621). It covers an area of approximately 60,000 m2, situated about 3 km east of the center of Mníšek pod Brdy, and borders the area of the former Kovohutě from the east to the southeast. The planned remediation will concern plots with parcel numbers 1965/28, 1965/27, 1965/112, and possibly also 1966/1, 1965/105, 2070/5, and 2070/6, if scattered waste from the dump is found on the land of these plots. The northern edge of Bažantnice is bordered by the waste dumps from the metallurgical production, including a vanadium tailings pond (and a larger part later used as an Al sludge dump), with southern solid waste dumps following — to the east the so-called old dump (primarily wastes from aluminum production) and to the west a dump of vanadium and ferrovandate slags, which has already been largely removed. The Bažantnice site, including the reclaimed Al sludge dump, vanadium tailings pond, and Al sludge dump, is located to the east of the Kovohutě operation halls. To the north and east, there is managed agricultural land, the Kovohutě area is fenced off to the west. To the south, there is a partially wooded area known as Bažantnice, bordered by the City Stream. To the southeast, Bažantnice borders the Sýkorník pond.
Remediation works are expected to include cleaning the area of the remedial lagoon, demolishing the sumps in the dumps, dismantling concrete panels, subsequently dividing the lagoon into eastern and western parts via a dividing dike, and implementing a seal at the bottom of the eastern lagoon to prevent contamination of groundwater. The project also envisions relocating all contaminated waste from the western part of the lagoon to a sealed space that will subsequently be covered with geomat and bentonite/foil sealing, which will be functionally connected to the lower insulating layer. Terrain modifications and technical and biological reclamation are also expected to be performed around the sealed lagoon.
During the remediation works, the development of concentrations of individual contaminants will be monitored at selected monitoring sites, wells, boreholes, and in surface water. The monitoring system of the existing area will be checked, and unnecessary objects will be removed. Given the nature of the contamination and the remediation intervention, the project will not end directly with an updated risk analysis, but rather with long-term monitoring of the concentration development of contaminants in the vicinity of the remediated and reclaimed area. The monitoring will track pH, conductivity, the presence of ions Ca, Na, Al, Co, Cu, Fe, Mn, Mo, Ni, Se, Sb, Be, Zn, Pb, the presence of V (variable oxidation states), BIII and CrVI in compounds, total CN, CHSKMn, F-, NO2-, NO3-, Cl-, SO42-, and NH4+.