| Business | Phone |
| Environmental Materials Corp 5883 Ellsworth Ave, Pittsburgh 15232 | (412) 362-9671 |
| Etimine Usa Inc 4 Penn Ctr W # 324, Pittsburgh 15276 | (412) 809-8215 |
| Glencore Limited 681 Andersen Dr, Pittsburgh 15220 | (412) 921-4800 |
| Merit Metal Inc 651 Holiday Dr # 300, Pittsburgh 15220 | (412) 563-6882 |