| Business | Phone |
| Southwest Geotechnical Inc 21704 Golden Triangle Rd # 42, Santa Clarita 91350 | (661) 222-9544 |
| Miller Geosciences Inc 26831 Ruether Ave # P, Santa Clarita 91351 | (661) 299-2206 |
| Geolabs Westlake Village 21002 Golden Triangle Rd, Santa Clarita 91350 | (661) 291-6275 |