GroundRosterJoseph L Linderman
| Name | Joseph L Linderman |
| Company | Great Valley Septic Services, Inc. |
| License number | 02707 |
| License type | Sewage Enforcement Officer (SEO) · On-Lot System Installer (DEP training-recognition list) |
| License status | Certified SEO — current renewal cycle through 2026-09-29 · DEP-recognized on-lot system installer; most recent training update 2021-09-28 (a training-recognition list, not proof of a currently active license) |
| License expires | 2026-09-29 |
| Based in | Malvern, Pennsylvania 19355 |
| Phone | (484) 716-2398 |
"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 Pennsylvania's official licensing records; we do not vouch for the business itself. Before hiring, look up license #02707 directly with the state, confirm it is still active, and ask for a current certificate of insurance.
Source: PA Clean Water Academy - Sewage Enforcement Officers (Active) + PA DEP Act 537 - On-Lot Sewage System Installer training-recognition list, last checked 2026-08-16. Verify at the official source.
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