| Business | Phone |
| Amec Earth & Environmental 3015 Horn Rapids Rd, Richland 99354 | (509) 375-3087 |
| Black & White Environmental Richland 99352 | (509) 628-8288 |
| Xron Associates Inc 703 Cottonwood Loop, Richland 99352 | (509) 946-8417 |
| Commodore Advanced Sciences 507 Knight St B, Richland 99352 | (509) 943-2565 |
| Dade Moeller & Assoc 1835 Terminal Dr, Richland 99354 | (509) 946-0410 |
| Energy Solutions 345 Hills St, Richland 99354 | (509) 376-7055 |
| Eberline Services Hanford Inc 3050 George Washington Way, Richland 99354 | (509) 372-9241 |
| Emp2 1950 Keene Rd, Richland 99352 | (509) 627-5401 |
| Envirocon Richland 99352 | (509) 946-7720 |
| Hanford Advisory Board 713 Jadwin Ave 4, Richland 99352 | (509) 942-1906 |
| Environmental Compliance Assoc Richland 99352 | (509) 628-9959 |
| Environmental Planning & Nepa Po Box 189, Richland 99352 | (206) 447-5747 |
| Environmental Quality Mgmt 1777 Terminal Dr, Richland 99354 | (509) 946-4985 |
| Freestone Environmental Svc 1100 Jadwin Ave 250, Richland 99352 | (509) 943-5222 |
| Gram Inc 1933 Jadwin Ave 205, Richland 99354 | (509) 946-1376 |
| Hpm Corp 1845 Terminal Dr, Richland 99354 | (509) 943-8484 |
| Hydrogeologic Inc 1201 Jadwin Ave, Richland 99352 | (509) 943-1711 |
| Integrated Environmental Tech 1935 Butler Loop, Richland 99354 | (509) 946-5700 |
| Safety & Ecology Corp 2750 Salk Ave 101, Richland 99354 | (509) 375-4270 |
| Science Applications Intl Corp 3250 Port Of Benton Blvd, Richland 99354 | (509) 372-7700 |