Scope 1 emissions include emissions that released from a facility as a direct result of the activities of the facility, such as fuel combustion, fugitive emissions from fuel, industrial processes emissions, and waste emissions (NGER Technical Guidelines 2011).
The NGER Technical Guidelines provide 4 methods for reporters to select for the estimation of emissions. Method 1, which is called the National Greenhouse Accounts default method, specifies the use of designed factors in the estimation of emissions. This method is usually used by reporters to calculate emissions resulting from the combustion of homogenous or similar fuel across most facilities. Method 2 is a facility-specific method that uses industry sampling and Australian or international standards listed in the Determination or equivalent for analysis of fuels and raw materials. It can provide more accurate estimates of emissions at facility level. It is likely to be useful for fuels with several variability in key qualities. Method 3 is also a facility-specific method which uses Australian or international standards for both sampling and analysis of fuels and raw materials. The similarity of method 2 and 3 is that the application of Australian and international documentary standards provide a benchmark for procedures for analysis. However, method 3 requires reporters additionally to comply with documentary standards for sampling, as well as documentary standards for analysis of fuels. Method 4 is about the direct monitoring of emission system either on a continuous or periodic basis. It can provide a higher level of accuracy in certain circumstances depending on the emissions process.
The first method is most appropriate for Contex because of its quick and easy maneuverability. Homogenous fuel must be used for the transport fleet. The data on consumption of particular fuel for transport would be multiplied by a specific emission factor, so that Contex can get a visual emissions
References: Commonwealth of Australia 2011, National Greenhouse and Energy Reporting System, Department of Climate Change and Energy Efficiency. Commonwealth of Australia 2011, National Greenhouse Accounts Factors, Department of Climate Change and Energy Efficiency. KPMG 2011, The Proposed Carbon Price Mechanism, viewed at 7 April 2012. <http://www.kpmg.com/AU/en/IssuesAndInsights/ArticlesPublications/Documents/Proposed-carbon-price-mechanism-April-2011.pdf.>