| Business | Phone |
| North Fork Assoc 110 Maple St # 100, Auburn 95603 | (530) 887-8500 |
| Paleo Resources Consultants 147 Webber Ln, Auburn 95603 | (530) 885-9696 |
| Bryan Woodhouse & Assoc 12280 Shale Ridge Ln, Auburn 95602 | (530) 885-7549 |
| Future Environmental Svc 10556 Combie Rd # 6250, Auburn 95602 | (916) 551-1475 |
| J House Environmental 220 Hidden Creek Dr, Auburn 95603 | (530) 885-7801 |
| Jacobson Environmental 148 Maple St # 2a, Auburn 95603 | (530) 888-5800 |
| Theroux Environmental 11960 Heritage Oak Pl, Auburn 95603 | (530) 823-7300 |