| Business | Phone |
| Ch2m Hill 3190 George Washington Wayb, Richland 99354 | (509) 375-3444 |
| Columbia Energy & Envrmnental 1806 Terminal Dr, Richland 99354 | (509) 946-7111 |
| Dmjmh & N 3250 Port Of Benton Blvd, Richland 99354 | (509) 375-7774 |
| Fluor Govt Group 1200 Jadwin Ave, Richland 99352 | (509) 372-2000 |
| Mse Technology Applications 2000 Logston Blvd 116, Richland 99354 | (509) 371-0827 |
| Nuvotec Usa 723 The Pkwy 200, Richland 99352 | (509) 943-5319 |
| E 2 Consulting Engineers Inc 1201 Jadwin Ave 201, Richland 99352 | (509) 946-0341 |