| Business | Phone |
| Enviro Tech Systems Inc 18820 Aurora Ave N, Seattle 98133 | (206) 363-9000 |
| Advanced Antifreeze Recycling Po Box 48294, Seattle 98148 | (206) 835-5693 |
| Burlington Environmental 1011 Western Ave, Seattle 98104 | (206) 223-0500 |
| International Pyrolysis Inc 40000 Aurora Ave N # 106, Seattle 98103 | (206) 632-4262 |