GroundRosterMark Kohout Jr.Licensed
| License number | 4389E3 |
| License type | Class E (System Contractor) |
| License status | Approved |
| Based in | Clayton, Kent County, Delaware 19938 |
"Based in" is the city and county of the address on the business's license record. That can be a mailing address; it doesn't tell you where the business works.
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 the official licensing records of the agency that issued the license; we do not vouch for the business itself. Before hiring, look up license #4389E3 directly with the agency that issued it, confirm it is still active, and ask for a current certificate of insurance.
Source: Delaware DNREC - licensed on-site wastewater treatment and disposal system licensees, last checked 2026-08-16. Verify at the official source.
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