Greenhouse inventory table

Origin Greenhouse Gas Inventory  
 Equity basis (ktCO2e)
 
Emissions 2001/02 2002/03 2003/04 2004/05 2005/06 2006/07
E&P 1,257 1,265 1,223 1,333 1,086 1,141
Generation (incl Contact Energy) 1,342 1,263 1,203 2,047 2,578 2,276
Networks 199 201 208 213 207 226
LPG 9 9 9 20 20 21
Offices 11 11 6 0 0 0
Total 2,818 2,749 2,649 3,613 3,891 3,663
             
Intensity            
E&P kt/PJe   14.5 15.4 13.0 12.5
Generation (incl Contact + steam) kt/PJe   109.2 76.9 83.6 71.4
Networks kt/PJe   10.2 11.0 11.2 11.6
 
Operated basis (ktCO2e)
Emissions 2001/02 2002/03 2003/04 2004/05 2005/06 2006/07
E&P
 520 500 558 675 538 806*
Generation 598 517 440 496 374 286*
Networks 1,041 1,083 1,189 1,217 1,250 1,312
LPG 23 24 23 23 23 21
Offices 11 11 6 0 0 0
Total 2,193 2,135 2,216 2,411 2,185 2,425
 
Intensity
E&P kt/PJe   12.8 15.3 11.1 11.4
Generation (incl steam) kt/PJe   206.2 213.2 201.0 192.6
Networks kt/PJe   10.2 11.0 11.2 11.6


This year Ernst & Young performed a limited assurance engagement in relation to the Exploration and Production and Generation businesses’ greenhouse gas inventory, determined on an operational control basis in accordance with ASAE 3000 ‘Assurance Engagements other than Audits or Reviews of Historical Financial Information’. Please refer to Ernst & Young’s Independent Limited Assurance Report for more information regarding the scope of work and procedures that were conducted.

Those figures verified by Ernst & Young are denoted by the symbol*

Notes: Origin's total greenhouse emissions from each of the Exploration and Production and Generation business units, determined on an operational basis, comprise the total emissions arising from oil and gas exploration and production and generation facilities within Australia and New Zealand that Origin operates, and includes emissions from:

  1. Direct sources, including venting and flaring of gas, stationary fuel combustion, process emissions, fuel consumed for the generation of electricity on-site heating.
  2. Indirect sources, including purchased electricity.
We have determined the total greenhouse emissions using the World Business Council for Sustainable Development Greenhouse Gas Protocol Revised Edition, the Australian Greenhouse Office ('AGO') Factors and Methods Workbook December 2006, emissions factors provided by the Australian Petroleum Production and Exploration Association ('APPEA' ) to Origin, and other relevant methods such as engineering mass balances ('the selected greenhouse methods').
  1. Inventory includes Yellowbank project offsets which have been sold to BP Australia. Due to commercial- in-confidence, amounts are not disclosed.
  2. Scope 1 and 2 emissions were included for all operated sites but in some cases only scope 1 emissions were included for non-operated sites.
  3. Emissions from non-operated joint venture sites (excluding the Cooper Basin and Contact Energy) are indicative as they rely on estimates based on the assessments of GHG emissions in a report by the Australian Gas Association in May 2000 and data from joint venture partners, which is then transcribed into the greenhouse inventory.
  4. Uncertainty has been estimated rather than specifically calculated, based on empirical data, for some parts of the business.
  5. Emissions data for Cooper Basin , which is incorporated in the Exploration and Production equity emission figure, is for the 2006 calendar year.
  6. Zero emissions from Origin offices include purchased offsets for electricity consumption.


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