EN9(1) In-Use Inventory and Releases of Ozone Depleting Substances
| Calendar Year | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 |
| Number of Releases | 4 | 2 | 3 | 0 | 1 | 1 |
| Mass Released (in kg) | 79.3 | 28 | 254 | 0 | 36 | 175 |
| Mass Released (in CFC-11 equivalent kg) | 275.6 | 1.5 | 2,092.5 | 0 | 360 | 1,750 |
| In-use Mass Halon 1301 (in CFC-11 equivalent kg) | no | no | no | no | 48,878 | 31,970 |
Release of ozone-depleting substances (ODS) in 2004 and 2003 were each due to a single, accidental release of Halon 1301 fire suppresant. Halons have up to 10 times the ozone depleting potential of standard CFC-11 refrigerant. 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). In-use amounts of Freons not known or reported. As BCTC assets continue to be owned by BC Hydro, BCTC incidents are included.
Last Modified: Jun 29, 2005
