| Business | Phone |
| Technical Assessment Svc Llc 7870 Sw Bristol Ct, Beaverton 97007 | (503) 641-0230 |
| Environmental Control 5840 Sw Erickson Ave # 46, Beaverton 97005 | (503) 202-0124 |
| Environmental Sampling Pro 3065 Sw 118th Ave, Beaverton 97005 | (971) 570-9654 |
| Evergreen Environmental Po Box 1604, Beaverton 97075 | (503) 985-1717 |
| Omni Environmental Svc 5465 Sw Western Ave # G, Beaverton 97005 | (503) 643-3788 |
| Ludlow & Assoc Beaverton 97008 | (503) 524-5114 |