| Business | Phone |
| Aat Labs Inc 1255 Buchanan Ave Sw, Grand Rapids 49507 | (616) 241-6070 |
| Aliya Analytical 557 Michigan St Ne, Grand Rapids 49503 | (616) 742-4088 |
| Bio-Chem Laboratories Inc 1049 28th St Se, Grand Rapids 49508 | (616) 248-4900 |
| Corrosion Control Consultants 4403 Donkers Ct Se, Grand Rapids 49512 | (616) 940-3112 |
| Fettig Laboratories Inc 900 Godfrey Ave Sw, Grand Rapids 49503 | (616) 245-3000 |
| Home Inspection Svc-Michigan 4445 Breton Rd Se B Pmb 171, Grand Rapids 49508 | (616) 891-0001 |
| Intertek Etl Semko 3033 Madison Ave Se, Grand Rapids 49548 | (616) 247-0515 |
| Two Men & A Hull Cell 2506 Mapleview Ct Se, Grand Rapids 49508 | (616) 554-1110 |
| Summit Laboratory 1435 Buchanan Ave Sw, Grand Rapids 49507 | (616) 245-3818 |
| Petroleum Technologies Inc 4665 Broadmoor Ave Se, Grand Rapids 49512 | (616) 698-9399 |