| Business | Phone |
| Cherrington Corp 7398 San Joaquin St, Sacramento 95820 | (916) 457-3040 |
| Fox Loomis Inc 6901 Mccomber St, Sacramento 95828 | (916) 383-2140 |
| B & J Drilling Sacramento 95841 | (916) 344-8180 |
| Fredricks Drilling Svc 6725 Pocket Rd, Sacramento 95831 | (916) 391-5030 |
| Lombardo Diamond Core Drilling Sacramento 95823 | (916) 391-6490 |