GroundRosterRobert J. DuffLicensed
| Name | Robert J. Duff |
| License number | 635, 4600 |
| License type | Soil Evaluator, Title 5 System Inspector |
| License status | Approved — MassDEP Title 5 Approved System Inspectors list · Approved — MassDEP Approved Soil Evaluators list |
| License expires | 2028-06-30 |
| Location | Auburn, Massachusetts |
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What this license covers
- Site testing: licensed to run percolation tests and evaluate soils to determine what kind of system a site can support.
- Inspection: licensed to inspect existing septic systems; the license you want for a home-purchase inspection.
How to verify this license
We publish this listing exactly as it appears in Massachusetts's official licensing records; we do not vouch for the business itself. Before hiring, look up license #635, 4600 directly with the state, confirm it is still active, and ask for a current certificate of insurance.
Source: MassDEP Title 5 - Approved System Inspectors · MassDEP - Approved Soil Evaluators, last checked 2026-08-17. Verify at the official source.
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