| Business | Phone |
| American Mobile Drug Testing 10905 E Montgomery Dr 5, Spokane 99206 | (509) 892-6904 |
| Flow Test Specialists Spokane 99201 | (509) 998-2705 |
| North Creek Analytcal Inc 11922 E 1st Ave, Spokane 99206 | (509) 924-9200 |
| Oil Analysis Lab Inc 1514 E Sprague Ave, Spokane 99202 | (509) 535-9791 |
| Petroleum Sciences Inc 4817 N Freya St 3, Spokane 99217 | (509) 489-1758 |
| Spokane Tribal Laboratories 9608 E Montgomery Ave 9, Spokane 99206 | (509) 928-3577 |
| Advanced Radon Technologies 2801 N Monroe St A, Spokane 99205 | (509) 326-5127 |