Page 54

Toronto Hydro 2014 CR Report_FINAL

GHG accounting Toronto Hydro reports GHG emissions through Scope 1 and 2 emissions, as quantified in accordance with national and provincial GHG reporting guidelines16, and the GHG Protocol — Corporate Accounting and Reporting Standard17: • Scope 1 — Consists of direct emissions from stationary combustion (facilities), mobile combustion (fleet) and fugitive sources (sulfur hexafluoride SF6 and refrigerant leaks). • Scope 2 — Contains indirect emissions from the use of purchased electricity (facilities and line losses). Our GHG inventory includes all Toronto Hydro-owned and controlled (leased) facilities, however emissions associated with capital work performed by our contractors are not included. Scope 3 emissions are also not included in this GHG inventory. The emission factors used to calculate the GHGs are the provincial values18 representative of Ontario’s energy supply mix, and are measured in tonnes of carbon dioxide equivalent emissions per gigawatt-hour (tCO2e). Our data from 2014 will represent Toronto Hydro’s greenhouse gas base year for comparison purposes going forward. Data sources used to calculate GHG emissions The Operations Support Services department is responsible for gathering energy consumption data (electricity and natural gas) from utility providers for all Toronto Hydro facilities included in the organizational boundaries19 described above. Calculations are based on: • Fuel consumption of fleet — documented with fuel supplier data and billing statements • SF6 — emission calculations were based on vendor top-up reports, including the kilograms of SF6 gas used during a top-up request. For the purpose of calculating emissions from decommissioned equipment, we assumed a 100% leakage rate because recycling vendor reports were not available. As necessary, adjustments will be made in future reports and it is likely that the actual leakage rate will be lower than the assumed rate • Energy consumption of facilities — collected from digital files on electricity, billing statements from our natural gas company and consolidated billing files from third parties for our leased buildings. We used 2012 data to calculate the natural gas consumption for one of our leased buildings • GHGs from refrigerant leaks are not included in our calculations as they were deemed immaterial (0.05% of emissions) Internal data assurance We conducted a sample audit of select electricity and natural gas bill entries, fuel consumption data, SF6 manufacturer and line loss data (electricity purchases and sales) to help decrease the potential for data entry errors. Changes to our organizational boundaries Since our last report in 2012, Toronto Hydro acquired a new facility which is currently under renovation. Two satellite work locations were also added in 2014. These changes are reflected in our current organizational boundaries. 16 Environment Canada’s Technical Guidance on Reporting Greenhouse Gas Emissions, Ontario’s Guideline for Greenhouse Gas Emissions Reporting 17 The Greenhouse Gas Protocol — A Corporate Accounting and Reporting Standard (World Resources Institute and World Business Council for Sustainable Development) ghgprotocol.org/files/ghgp/public/ghg-protocol-revised.pdf 18 Emission factors published in Environment Canada’s National Inventory Report 1990-2011: Greenhouse Gas Sources and Sinks in Canada. 19 According to the Greenhouse Gas Protocol, the organizational boundaries include all operations/facilities over which Toronto Hydro has control. Toronto Hydro uses the ‘control approach” for consolidating its GHG emissions. 54 TORONTO HYDRO 2014 CORPORATE RESPONSIBILITY REPORT


Toronto Hydro 2014 CR Report_FINAL
To see the actual publication please follow the link above