| Business | Phone |
| Iowa Inspection Technologies 111 Rich Mar Ct Nw, Cedar Rapids 52405 | (319) 390-3910 |
| Mc Neal Tool Co 3350 Square D Dr Sw, Cedar Rapids 52404 | (319) 366-2701 |
| Radon Results Inc Cedar Rapids 52404 | (319) 365-0225 |
| Silliker Laboratories 405 8th Ave Se, Cedar Rapids 52401 | (319) 366-3570 |