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Sivu: 1Sivu: 2Sivu: 3Sivu: 4Sivu: 5Sivu: 6Sivu: 7Sivu: 8Sivu: 9Sivu: 10Sivu: 11Corporate responsibility Key FiGUres tHe enVironMent anD saFety Methane emissions around 44% of Gasum’s direct greenhouse gas emissions are reIMPACTS ON BIODIVERSITY leases of methane. these take place from the transmission network natural gas pipeline construction may have impacts on ecointo the atmosphere in conjunction with measures such logical conditions, soil and bedrock, surface and ground as the emptying of sections of pipelines. Called water as well as landscapes and cultural environblowdown, this is necessary when natural gas has ments. in the planning phase preceding constructo be removed from a section because of a tion proper, assessments are made on valuable disturbance or due to maintenance or conThanks to its low carbon natural and cultural sites and used as a basis for nection work. emissions are also caused by and high hydrogen content, the selection of those routing and placement leaks in the distribution network. when combusted natural alternatives and working methods that help in 2010 methane emissions from minimise the burden on the surrounding natuGasum’s transmission system totalled 306 gas creates significantly less ral environment. such an assessment is either tonnes (472 tonnes in 2009). in addition, carbon dioxide emissions an environmental report produced by Gasum methane emissions from the lnG facilthan other fossil fuels. or, if so required by an authority, an environmenity taken into service in 2010 totalled 0.4 tal impact assessment (eia) programme, the covtonnes. erage of which is assessed by the authority. Methane emissions from Gasum’s distribution networks totalled 1,166 tonnes in 2010. the main TOTAL DIRECT AND INDIRECT source of emissions in the distribution network is the gas GREENHOUSE GAS EMISSIONS distribution network located in Helsinki that is in parts rather aged. Gasum’s direct greenhouse gas emissions are regarded to comprise the town gas network is under systematic upgrading. this work has those arising from the maintenance of Gasum’s natural gas network, already resulted in a 40% cut in network emissions since 2002. emissions and leaks taking place in natural gas transmission and according to statistics Finland, Finland’s methane emissions distribution and emissions from the natural gas liquefaction plant amounted to 203,300 tonnes in 2009. Gasum’s transmission activity opened in 2010. Greenhouse gas emissions are also caused by busi- accounts for very little of Finland’s total methane emissions, with the ness travel using natural gas vehicles owned by Gasum as well as rate for 2009 being around 1%. other vehicles and air travel. reporting on methane emissions differs from information providGasum’s activities cover the transmission of natural gas in Finland ed in our annual report for 2010 as that does not contain emissions to end users. this transmission stage results in minor environmental from the distribution network. We are developing our reporting on impacts and emissions. Most emissions occur in the natural gas usage key environmental figures through measures such as the introducstage, which is the case with other fuel-based energy chains too. tion of environmental data collection and reporting software, which will make data regarding issues including greenhouse gas emissions more specific and improve its comparability. Greenhouse gas emissions by emission source eU13 transmission system methane emissions Compressor station Co2 emissions pressure reduction station Co2 emissions in-house use of natural gas, Co2 emissions 44% 39% 16% 1% Carbon dioxide and nitrogen oxide emissions the transmission of natural gas along pipelines requires compressor stations where gas pressure is increased at intervals of about 100 km along the network. the compressors’ operational power is obtained from gas turbines using natural gas as their fuel. Gasum’s compressor stations are located in imatra, Kouvola and Mäntsälä. Carbon dioxide emissions from Gasum’s transmission system totalled 46,150 tonnes in 2010 (34,310 tonnes in 2009). nitrogen oxide (nox) emissions from the transmission system totalled 79.6 tonnes (51.6 tonnes), and compressor stations’ average nox-specific emission was 92.8 mg per MJ. in-house use was not taken into consideration in the total carbon dioxide emissions figure for 2009. in-house use accounted for around 1.5% of total Co2 emissions in 2010. Gasum’s imatra and Kouvola compressor stations fall within the sphere of emissions trading.they accounted for approximately 32,260 tonnes or 70% of Gasum’s carbon dioxide emissions in 2010. the remainder is caused by the heating of natural gas pressure reduction stations (13,200 tonnes) and in-house use (690 tonnes), which means use of natural gas to heat Gasum facilities and fuel service vehicles. Corporate responsibility report 2010 11 en16
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