Repair of rainwater sewage network in the area of Staszica and Stefania Pawlak streets intersection

… renovation of the existing concrete channel DN400 with modular pipes DZ355 (internal diameter min. 315 mm); sections S0 to S3 and S0 to S4 – renovation of existing concrete ducts DN500 with modular pipes DZ450 (inner diameter min. 400 mm). 2) replacement of the section by the open excavation method: (a) section S0 to S2 – dismantling of the old concrete channel and laying of the new PVC-U pipe SN8 DN200 on the sand ballast with change of drop to min. 5,0‰. 3) redevelopment of the S0 central node/chamber: a) comprehensive renovation of the concrete chamber S0 (DN1500) including: cleaning, reprofiling of concrete losses with repair mortars, installation of an internal wall covering made of PE-HD boards (minimum 4-5 mm) combined by extrusion welding and construction of a wall cladding made of acid and abrasive basalt boards. b) execution of internal cascade switches in the S0 junction on the inlets from the S1 well side (vertical with the DN355 pipe along with the liquidation of the old external cascade) and from the S2 well side (DN200 inlet), c) installation of system waterproof passages on the inlets and outlets of ducts to the chamber. 4) accompanying and preparatory works: a) development and implementation of a temporary traffic organization project for the duration of works in the road lane. b) ensuring continuity of sewage disposal by organizing a temporary pump by-pass for the time of switching off the modernized ducts. c) hydrodynamic cleaning and execution of preliminary and as-built TV inspections (CCTV) of ducts. d) full restoration of the asphalt surface after earth works (the total estimated surface replacement area with a milled part and a full structural base is approx. 170 m ², including full support on an area of approx. 20 m²) and clean-up of green areas. (e) Carrying out final water leak tests (exfiltration) in accordance with PN-EN 1610. 4. A detailed description of the contract is included in the design documentation, the detailed technical specifications for the execution and acceptance of the works, the bill of quantities on which the information is based and the draft contract. 5. Where manufacturer names, trademarks, standards, approvals, technical specifications and reference systems appear in the FTZ or in any annex to the FTZ, equivalent products may be substituted. The Employer will consider as equivalent solutions such solutions that allow to obtain the effect assumed by the Employer using other technical solutions. An identical solution cannot be considered equivalent, but only one that indicates exactly the same or very similar value in use in the compared characteristics. By indicating the manufacturer's names, trademarks, standards, approvals or reference systems, the Ordering Party aimed to define the minimum quality parameters and performance characteristics that must be met by the goods in order to meet the requirements set by the Ordering Party and constitute only a quality model of the subject of the contract. By the provision concerning the minimum requirements of quality parameters, the Ordering Party understands the requirements of goods contained in generally available sources, catalogues, inte pages