| Business | Phone |
| Environmental Transport Inc Po Box 84661, Seattle 98124 | (206) 762-8824 |
| Filco Co Inc 13190 Stone Ave N, Seattle 98133 | (206) 547-8347 |
| Frontwater Environmental 8661 Dallas Ave S, Seattle 98108 | (206) 767-0301 |
| Fuelcare 509 Ne 165th St, Seattle 98155 | (206) 365-5853 |
| Fuelcare Inc 9071 Matthews Ave Ne, Seattle 98115 | (206) 527-5883 |