| Business | Phone |
| Total Gas Detection Ltd 7304 30 St Se #112, Calgary T2C 1W2 | (403) 203-2034 |
| Hetek Consultants Ltd 820 28 St Ne #1a, Calgary T2A 6K1 | (403) 273-5033 |
| Merendon Mining Corp 333 11 Ave Sw #630, Calgary T2R 1L9 | (403) 261-8895 |
| Procon Systems Inc 6020 2 St Se #7, Calgary T2H 2L8 | (403) 255-2921 |
| B W Technologies Ltd 2840 2 Ave Se, Calgary T2A 7X9 | (403) 248-9226 |
| Enviro-Rentals 823 41 Ave Ne #8, Calgary T2E 6Y3 | (403) 276-2532 |
| Gasonic Instruments Inc 823 41 Ave Ne #8, Calgary T2E 6Y3 | (403) 276-2201 |
| Gas Tech Instruments Canada 2922 3 Ave Ne, Calgary T2A 6T7 | (403) 291-4700 |