| Business | Phone |
| Donlevy & Assoc 1551 E 89th Ave, Merrillville 46410 | (219) 736-0472 |
| Microbac Laboratories Inc 250 W 84th Dr, Merrillville 46410 | (219) 932-1770 |
| Sima Labs Intl 250 W 84th Dr, Merrillville 46410 | (219) 769-8378 |
| Us Inspection Svc 8789 Louisiana St, Merrillville 46410 | (219) 736-9500 |