Gasum Annual Report 2009

Sivu: 1 Sivu: 2 Sivu: 3 Sivu: 4 Sivu: 5 Sivu: 6 Sivu: 7 Sivu: 8 Sivu: 9 Sivu: 10 Sivu: 11 Sivu: 12 Sivu: 13 Sivu: 14 Sivu: 15 Sivu: 16 Sivu: 17 Sivu: 18 Sivu: 19 Sivu: 20 Sivu: 21 Sivu: 22 Sivu: 23 Sivu: 24 Sivu: 25 Sivu: 26 Sivu: 27 Sivu: 28 Sivu: 29

Sivu: 30

REsPONsibiLiTY vAsTUULLisUUs EnvironmEntal impacts of Gasum’s activity Gasum recognises the fact that its business has environmental impacts. Any adverse impacts of natural gas transmission activity are reduced by employing environmentally-friendly technologies and carefully planning the use and maintenance of the network. METHANE EMISSIONS t 1200 1000 800 600 400 200 0 99 00 01 02 03 04 05 06 07 08 09 METHANE EMISSIONS Natural gas imported to Finland contains 98% methane. Methane is one of the greenhouse gases contributory to global warming. Methane is released into the atmosphere in conjunction with measures such as the emptying of pipelines. called blowdown, this is necessary when the natural gas in a pipeline has to be depressurised in an emergency situation or due to servicing or connection works. In 2009 methane emissions totalled 472 tonnes. During utilisation periods, emissions accounted for 0.016% of transmitted gas volumes. In 2008 Finland’s methane emissions totalled 203,400 tonnes. Gasum accounted for 0.23% of Finland’s total methane emissions. METHANE EMISSIONS/as % of gas transmitted % 0.035 0.030 0.025 0.020 0.015 0.010 0.005 0 99 00 01 02 03 04 05 06 07 08 09 cARbON DIOXIDE AND NITROGEN OXIDE EMISSIONS The pressure of natural gas is raised at compressor stations located along the pipeline at approximately 100-km intervals.The compressors’ operational power is obtained from gas turbines using natural gas as their fuel.The combustion of natural gas creates carbon dioxide, water vapour and nitric oxides. In 2009 the quantity of carbon dioxide emissions totalled 34,310 tonnes. Nitric oxide emissions totalled 51.6 tonnes and the compressor stations’ average NOx-specific emission was 69.2 mg/MJ. The combined power of the compressors belonging to the natural gas transmission system is 63 MW. The Imatra and Kouvola compressor stations fall within the sphere of emissions trading.They accounted for approximately 22,269 tonnes of Gasum’s carbon dioxide emissions. Gasum also uses natural gas to heat the pressure regulating stations. This accounts for 12,041 tonnes. cARbON DIOXIDE EMISSIONS t 80 000 70 000 60 000 50 000 40 000 30 000 20 000 10 000 0 99 00 01 02 03 04 05 06 07 08 09 OXIDES OF NITROGEN (NOx) t 140 120 100 80 60 40 20 0 99 00 01 02 03 04 05 06 07 08 09 cARbON DIOXIDE EMISSIONS FROM NATURAL GAS PRODUcTION AND USE Natural gas consumed in Finland is imported from the Western-Siberian natural gas fields in Russia, some 3,300 km from the Finnish-Russian border. The natural gas obtained is very pure and mainly contains methane with only small amounts of other components. The gas is sold by the Russian company Gazprom. According to international studies, greenhouse gas emissions from the production and transmission of Russian natural gas are estimated to account for around 12% and those from the combustion of natural gas for 88% of the greenhouse gas emissions of the entire fuel chain (measured at tonnes of cO2 equivalents). 30 SPEcIFIc EMISSIONS OF NOX (Oxides of nitrogen) mg/MJ 200 180 160 140 120 100 80 60 40 20 0 99 00 01 02 03 04 05 06 07 08 09 30

Sivu: 30 Sivu: 31 Sivu: 32 Sivu: 33 Sivu: 34 Sivu: 35 Sivu: 36 Sivu: 37 Sivu: 38 Sivu: 39 Sivu: 40 Sivu: 41 Sivu: 42 Sivu: 43 Sivu: 44 Sivu: 45 Sivu: 46 Sivu: 47 Sivu: 48 Sivu: 49 Sivu: 50 Sivu: 51 Sivu: 52 Sivu: 53 Sivu: 54 Sivu: 55 Sivu: 56