GroundRosterDuffield Assicoates, IncLicensed
| Name | Duffield Assicoates, Inc |
| License number | 2089D3, 2089B |
| License type | Class B (Standard-Designer) ยท Class D (Site Evaluator) |
| License status | Approved |
| Location | Wilmington, Delaware 19808 |
| Phone | (302) 239-6634 |
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What this license covers
- Design: licensed to size and lay out a septic system for a specific site and soil condition.
- Site testing: licensed to run percolation tests and evaluate soils to determine what kind of system a site can support.
How to verify this license
We publish this listing exactly as it appears in Delaware's official licensing records; we do not vouch for the business itself. Before hiring, look up license #2089D3, 2089B directly with the state, 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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