---
title: "Patrick G. Brennan, Title 5 System Inspector SI #3617 | Title 5 Roster"
description: "Patrick G. Brennan is a MassDEP-approved Title 5 System Inspector (SI #3617) based in Marshfield, MA. Approval expires June 30, 2028 per the NEIWPCC list."
canonical: https://title5roster.com/inspectors/patrick-g-brennan-si3617/
---

# Patrick G. Brennan, Title 5 System Inspector (SI #3617)

Patrick G. Brennan is on the NEIWPCC list of MassDEP-approved Title 5 System Inspectors dated October 2, 2026.

* **SI number:** #3617
* **Approval expires:** June 30, 2028
* **Approved by:** Massachusetts Department of Environmental Protection (MassDEP); list published by NEIWPCC
* **Business listing:** PGB Engineering LLC
* **Based in:** Marshfield, MA
* **County:** Plymouth County

Source: https://neiwpcc.org/wp-content/uploads/2026/10/SI-Instate-10.2.2026.pdf (retrieved 2026-10-12)