GroundRosterT.C. Holzen, Inc.
| Name | T.C. Holzen, Inc. |
| License number | 8000078623 |
| License type | Sewage Treatment System Installer |
| License status | Bonded — Ohio Department of Health, 2026 bond lists |
| Based in | New Carlisle, Ohio 45344 |
| Phone | (937) 667-0870 |
"Based in" is the city on the business's state license record. That can be a mailing address; it doesn't tell you where the business works.
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What this license covers
- Installation / repair: licensed to build and install septic tanks and drainfields, and to repair or replace failed ones.
How to verify this license
We publish the license details exactly as they appear in Ohio's official licensing records; we do not vouch for the business itself. Before hiring, look up license #8000078623 directly with the state, confirm it is still active, and ask for a current certificate of insurance.
Source: Ohio Department of Health - Sewage Treatment System Bond Lists, last checked 2026-08-17. Verify at the official source.
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