| Business | Phone |
| Environmental Testing Inc 4619 N Santa Fe Ave, Oklahoma City 73118 | (405) 488-2400 |
| Langston University Hiv 3033 N Walnut Ave, Oklahoma City 73105 | (405) 528-9296 |
| Oklabs Inc 921 Nw 72nd St, Oklahoma City 73116 | (405) 843-6832 |
| Tulsa Gamma Ray Inc 4059 Nw 3rd St, Oklahoma City 73107 | (405) 943-9870 |
| Terracon Consultants Inc 832 Nw 67th St, Oklahoma City 73116 | (405) 848-1607 |
| Research Technologies Llc 100 N Rockwell Ave # 102, Oklahoma City 73127 | (405) 789-0402 |