Lista de empresas
| Name | Province | City | |
|---|---|---|---|
| Ostrem Chemical Co. Ltd. - Ostrem Chemical Co. Ltd. | Alberta | Edmonton | |
| Ottawa - Royal Canadian Mint | Ontario | Ottawa | |
| Ottawa (Moodie) RMC - Lafarge Canada Inc. - EAST | Ontario | Nepean | |
| Ottawa Bearbrook Aggregates - Lafarge Canada Inc. - EAST | Ontario | Ottawa | |
| OTTAWA DISRIBUTION TERMINAL - IMPERIAL OIL | Ontario | Nepean | |
| Ottawa Health Sciences Centre (OHSC) Cogeneration Facility - TransAlta Cogeneration L.P. | Ontario | Ottawa | |
| Ottawa Landfill - Waste Management of Canada Corporation | Ontario | Ottawa | |
| Ottawa Moodie Drive Agg - Lafarge Canada Inc. - EAST | Ontario | Napean | |
| Ottawa Quarry - West Carleton Sand & Gravel Inc. | Ontario | Ottawa | |
| Ottawa Terminal - Shell Canada Products | Ontario | Ottawa |
