Trenchless Engineering in Poland Renovations SSewerewer RRenovationenovation iinn SSzczecinzczecin hen, at the end of 2002, the press advertised the tender for act as supplement to multiannual domestic programmes in environ- Wthe renovation of sewers in Bohaterów Warszawy and Ku mental protection and transport. EU assistance must be coordinated Słońcu streets in Szczecin we did not realise that soon we with measures implemented by the government within the frame- would be part of one of the biggest projects funded by the ISPA. In work of national strategies for the transport and environmental pro- fact, we knew next to nothing about the programme then, and we tection sectors in applicant countries. Following Poland’s accession to knew just as little of how it all works. What is FIDIC, what is the differ- the EU all projects that have been approved for ISPA financing will be ence between “yellow” and “red”, what can the Contract Engineer do continued in the following years as Cohesion Fund projects. and what can we, the Contractors, do? We knew nothing of that, either. Today, when we are nearly completing our Szczecin challenge, we can ISPA in Szczecin speak of our experience with pride. The battle for aid funds for Szczecin began on May 15 2000, when Resolution XXIV/652/2000 of the City Council was adopted, concerning First, some words about the Master Plan, i.e. the baseline document determining the needs of the ISPA programme. the City in water and wastewater management. In September 2000 the The ISPA programme is a form of financial assistance extended by the final version of the application to support the project „Improvement of European Union to candidate countries. The main objective of the as- water quality in Szczecin” – phase I, to the value of 46 397 000 €. - under sistance was to upgrade the level of technical infrastructure in applicant ISPA was ready. The application was approved by the ISPA Management countries. Poland could use the assistance from 2000 onwards under Committee in the European Commission on 26 October 2000, and on Council Regulation No. 1267 dated 21 June 2000. The ISPA programme 28 December 2000 a Financial Memorandum was signed, agreed be- only provides finance to large projects, of values in excess of 5 million tween the European Commission and the Polish Republic. euro, which must conform to EU standards of environment protection Initially the beneficiary of ISPA funding was the municipality of and transport. The key priorities of the programme are as follows: Szczecin, but the application for phase II of the programme, covering • construction of large Waste Water Treatment Plants and water/ the largest ISPA grant in Poland, of a value of 288 000 000 €, was made sewage systems, by the Water and Sewage Company Zakład Wodociągów i Kanalizacji • modernisation and extension of urban district heating systems in , special edition NO-DIG 2004 combination with liquidation of “low stack emissions” and ther- morenovation of buildings, • investments in air quality improvement in large urban agglomera- tions, • environment oriented investments in urban transport systems, • construction and modernisation of regional waste landfills, • creation of waste utilisation systems, Inżynieria Bezwykopowa • linking the transport systems with member state infrastructure 14 • construction of trans-European transport network One of the main principles of the ISPA programme is that it can only We are on the Ku Słońcu street Renovations Trenchless Engineering in Poland Sp. z o.o. in Szczecin. Under an addendum to the Financial Memoran- dum signed on 18 December 2002, ZWiK Sp. z o.o. assumed the rights and responsibilities of final beneficiary. For the purposes of servicing the project a task force was established within ZWiK Szczecin – the Department of ISPA Co-financed Projects. The first service contract, with the Engineer for the project “Con- struction of a sewerage and pumping station system in the Pomorzany quarter in Szczecin”, was signed on 28 October 2002, and the first con- tractor was hired on 6 June 2003 for the “Construction of wastewater pumping station Górny Brzeg with the transfer pipeline to the Pomor- zany Waste Water Treatment Plant”. Our contract– „Renovation of the sewerage system in the Bohaterów Warszawy and Ku Słońcu streets in Szczecin” was signed on 30 June 2003. There is a total of 11 works contracts, 6 engineering contracts and 2 technical assistance contracts to be concluded within the framework of the project. Contract signature no. 04 –„Renovation of the sewerage system in Bohate- rów Warszawy and Ku Słońcu streets in Szczecin.” Key objectives of the programme of „Im- proving the water quality in Szczecin” The programme is expected to take an integrated approach to the water and sewage system of Szczecin and to improve the collection of wastewater from left- and right bank Szczecin, combined with an effi- cient wastewater treatment system. The project will directly contribute to improving the quality of residents’ life, will lead to meeting EU stand- ards and fulfilling the EU directives. The project includes the construc- tion of the “Pomorzany” Waste Water Treatment Plant (66 000 m3/day), adding the biological part and extending the physical-biological part of the “Zdroje” Waste Water Treatment Plant (18 000 m3/day), construc- tion of a modern water-sewerage network and modernisation of the existing water-sewerage network in various parts of the town. In addi- tion, the programme implements an integrated system of wastewater sludge disposal. A significant reduction of pollutant loads discharged to the Odra river by the 416 thousand residents of Szczecin will be accom- plished by incorporating into the system modern wastewater treat- ment plants, meeting EU standards. The quantity of wastewater cur- rently discharged to the Odra river and the Dąbie Lake is about 90 000 m3/day, and only a small part of the volume is subjected to physical and chemical treatment. There is practically no biological wastewater treat- ment in the town. The construction of modern sewage network will im- prove the wastewater collection system, securing that the wastewater will end up in the Waste Water Treatment Plant, which will reduce the environmental impact by reducing the pollution of soil and ground wa- ter as a result of liquidation of leaking septic tanks and illegal discharges directly to the environment. Modernisation of the existing sewerage Schema of the Bohaterów Warszawy and Ku słońcu streets network will make it tighter, eliminating infiltration of water into the system. At the same time, it will help protect the soil and ground water signed the contract on 30 June 2003. The contract covered the engi- against the pollutants originating from the wastewater, and will con- neering and the actual renovation of sewers in Bohaterów Warszawy tribute to improved efficiency and reliability of the system. and Ku Słońcu streets, including renovation of inspection manholes The total cost of the undertaking has been estimated at 288 million €. and sealing of the laterals at a length of one metre. The European Union supported the project with over 190 million € for- In total, the renovation project covered over 8km of sewage, com- givable support, which constitutes 66% of the cost of the project. bined and storm water sewers, along with network components, in- The balance is contributed by the beneficiary. The money will be cluding: raised, among other things, from soft loans extended by the National in Bohaterów Warszawy street: , special edition NO-DIG 2004 and Regional Environmental Protection Funds, the company’s own • Circular sewers DN 350-500 mm, length of about 250m funds and commercial loans. • Egg shape sewers 500/750, 600/900, 700/1050, length of about 300m Contract No. 2000/PL/16/P/PE/016-04 • Egg shape sewers 930/1400, 1000/1500, 1500/1550, - „Renovation of the sewerage system 2000/1500, length of about 2700m in Bohaterów Warszawy and Ku Słońcu • Inspection manholes, 69 pieces streets in Szczecin” • Laterals, over 500 pieces Inżynieria Bezwykopowa And this is how it began. Representatives of the victorious Consor- in Ku Słońcu street: 15 tium Ludwig Pfeiffer Gmbh & Co. KG and UPONOR Poland Sp. z o.o. • Circular sewers DN 250-600 mm, length of about 5000m Trenchless Engineering in Poland Renovations • Egg shape 600/900, 700/1050, length of about 200m • Inspection manholes, about 100 pieces • Laterals, about 400 pieces The proposal of the Pfeiffer & Uponor consortium defined the reno- vation technologies as follows: • Circular sewers DN 250-500 to be renovated using Omega Liner® by INFRA sp. z o.o. (Pfeiffer is shareholder in INFRA Sp z o.o.) • Circular sewers DN 600 and egg shape sewers up to 800/1200 to be renovated with Saertex® Liner • Other large diameter sewers to be renovated by applying mineral coatings. Brief description Insertion the Omega Liner of the technologies proposed OMEGA Liner® is a close fit liner made of modified PVC, intended for trenchless renovation of sewerage network. The liner is manufactured as a normal round pipe which, in the final stages of pipe production, is deformed to an ”Ω” shape. The pipes are then wound on drums. By shaping the pipes to such profile, their cross section area is reduced by some 30%, so that they can be pulled into the pipeline to be reno- vated. Before insertion the liner must be preheated in the so called „sauna”, a thermally insulated trailer used to transport the drums and unwind the liner during installation. Once the liner has been inserted, its ends are plugged with caps through which steam is fed inside; un- der the influence of the steam the liner opens and assumes the shape of the sewer in which it is installed. With further heating and under increased pressure the liner expands uniformly and fits tightly into the old pipeline.