GroundRosterJoseph L Linderman
License details
| 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 | September 29, 2026: the expiry date in our copy (as of August 16, 2026) has passed. Check with the issuing agency. |
| Based in | Malvern, Chester County, Pennsylvania 19355 |
"Based in" is the city and county of the address on the business's license record.
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 public licensing records of the agency that issued the license; we do not vouch for the business itself. Before hiring, look up license #02707 directly with the agency that issued it, 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. Look it up at the issuing agency.
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