0.393 tCO2e/MWh.5 This benchmark was developed by ECCC based on data provided by companies in the natural gas pipeline sector and represents 80% of the production-weighted average of that data.

• 3. Forecast annual production is forecast compressor energy use based on the following formula:

  Energy (MWh)6 =
  Rated Compressor Brake Power (MW) × Load (%) × Operating Hours (h)

  Where:
  Load (%) =
  The % load of the engine
  -or-
  Calculated by Average Annual Speed (RPM) ÷ Max Rated Speed (RPM)

• 4. To forecast the annual production value for 2021, Enbridge Gas has calculated the compressor energy use in MWh for 2017 to 2019 and used an average of this data.

  Enbridge Gas’s detailed calculations of the 2021 forecast emissions, facility emissions limit, OBPS compliance obligation and OBPS facility carbon cost for each of the EGD rate zone and Union rate zones can be found at Exhibit B, Tab 1, Schedules 3-5 and at Exhibit B, Tab 2, Schedules 3-5.

5As shown in Item 5 in Schedule 1 of the Output-Based Pricing System Regulations. The value of the OBS was updated in the Final Regulation. The value stated in the Regulatory Proposal was 0.419 tCO2e/MWh.

6 Amount of work required by a compressor to transport gas.