| Business | Phone |
| Bennett & Williams Inc 2700 E Dublin Granville # 400, Columbus 43231 | (614) 882-9122 |
| Bhe Environmental 1335 Dublin Rd # 126, Columbus 43215 | (614) 487-7831 |
| Ctl Engineering Inc 2860 Fisher Rd, Columbus 43204 | (614) 276-8123 |
| Pandey Environmental Llc 673 Mohawk St # 300, Columbus 43206 | (614) 444-8078 |
| Gandee & Assoc Inc 4488 Mobile Dr, Columbus 43220 | (614) 459-8338 |