InternationalAluminiumInstituteTheAluminiumSectorGreenhouseGasProtocol(AddendumtotheWRI/WBCSDGreenhouseGasProtocol)GreenhouseGasEmissionsMonitoringandReportingbytheAluminiumIndustryOctober2006InternationalAluminiumInstituteTHEALUMINIUMSECTORADDENDUMTOTHEWBCSD/WRIGREENHOUSEGASPROTOCOL........6INTRODUCTION............................................................................................................................6SECTION1GHGACCOUNTINGANDREPORTINGPRINCIPLES...........................................................8SECTION2BUSINESSGOALSANDINVENTORYDESIGN....................................................................8SECTION3SETTINGORGANIZATIONALBOUNDARIES......................................................................8SECTION4SETTINGOPERATIONALBOUNDARIES...........................................................................9SECTION5TRACKINGEMISSIONSOVERTIME.............................................................................10SECTION6IDENTIFYINGANDCALCULATINGGHGEMISSIONS........................................................15SECTION7MANAGINGINVENTORYQUALITY..............................................................................15SECTION8ACCOUNTINGFORGHGREDUCTIONS........................................................................16SECTION9REPORTINGGHGEMISSIONS...................................................................................16SECTION10VERIFICATIONOFGHGEMISSIONS........................................................................17SECTION11SETTINGGHGTARGETS.......................................................................................18APPENDIXACALCULATIONMETHODSFORPROCESSCARBONDIOXIDEANDPERFLUOROCARBONEMISSIONSRESULTINGFROMALUMINIUMREDUCTIONANDSUPPORTINGPROCESSES..................................................................................................................201.PROCESSCARBONDIOXIDEEMISSIONS................................................................................201.1SourcesofCarbonDioxide.......................................................................................211.1.1Electrolysis................................................................................................................................................211.1.2AluminiumSmeltingSupportingProcesses...............................................................................................211.1.3AluminaRefiningSupportingProcesses....................................................................................................221.2MethodsforCalculationofProcessCarbonDioxideEmissions..............................221.2.1Tier1–DefaultFactorMethodforCarbonDioxideEmissions.................................................................231.2.2Tier2–MethodUsingProcessSpecificEquationswithIndustryTypicalParametersforCarbonDioxideEmissions..................................................................................................................................................................231.2.3Tier3–MethodUsingProcessSpecificEquationswithFacilitySpecificParametersforCarbonDioxideEmissions..................................................................................................................................................................231.3CalculationofCarbonDioxideEmissions...