GroundRosterDavid W Knowles JrLicensed
| Name | David W Knowles Jr |
| License number | 1942001896 |
| License type | Master Alternative Onsite Sewage System Operator |
| License status | Current |
| License expires | 2027-05-31 |
| Location | Front Royal, Virginia 22630 |
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What this license covers
- Operation: licensed to operate and monitor onsite sewage systems; alternative systems typically require a licensed operator under an ongoing service contract.
How to verify this license
We publish this listing exactly as it appears in Virginia's official licensing records; we do not vouch for the business itself. Before hiring, look up license #1942001896 directly with the state, confirm it is still active, and ask for a current certificate of insurance.
Source: Virginia Department of Professional and Occupational Regulation (DPOR) - regulant list, last checked 2026-08-16. Verify at the official source.
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