EN9(1) In-Use Inventory and Releases of Ozone Depleting Substances
| Calendar Year | 2001 | 2002 | 2003 | 2004 | 2005 |
| Number of Releases | 3 | 0 | 1 | 1 | 2 |
| Mass Released (in kg) | 254 | 0 | 36 | 175 | 90 |
| Mass Released (in CFC-11 equivalent kg) | 2,540 | 0 | 360 | 1,750 | 5.0 |
| In-use Mass Halon 1301 (in CFC-11 equivalent kg) | no data | no data | 48,878 | 31,970 | 1,516 |
Halons have up to 10 times the ozone depleting potential of standard CFC-11 refrigerant. This Ozone Depletion Potential factor for each substance is multiplied by the mass of the release to come up with the mass in CFC-11-equivalents. ODS are regulated provincially and federally and will eventually be phased out. While BC Hydro's existing inventory has been decreasing and will continue to decrease in coming years, ODSs are contained in existing air conditioners and chillers as refrigerants (Freons) and in existing fire suppression systems as extinguishing agents (Halons). Both incidents in 2005 involved the leakage of HCFC-22 from refrigeration equipment. In-use amounts of Freons not known or reported. Since British Columbia Transmission Corporation (BCTC) assets continue to be owned by BC Hydro, BCTC incidents are included.
Last Modified: Jul 17, 2006
