| Business | Phone |
| Apex Envirotech Inc Po Box 9609, South Lake Tahoe 96158 | (530) 541-0661 |
| Aspen Environmental Planning 2409 Lupine Trl, South Lake Tahoe 96150 | (530) 542-0454 |
| Entrix Inc 1048 Ski Run Blvd, South Lake Tahoe 96150 | (530) 542-0201 |
| It Corp 1144 Emerald Bay Rd, South Lake Tahoe 96150 | (530) 542-3783 |
| Simon Planning & Environmental Po Box 113, South Lake Tahoe 96156 | (530) 577-0406 |