---
title: "Peter Armstrong, Title 5 System Inspector SI #3111 | Title 5 Roster"
description: "Peter Armstrong is a MassDEP-approved Title 5 System Inspector (SI #3111) based in Marshfield, MA. Approval expires June 30, 2028 per the NEIWPCC list."
canonical: https://title5roster.com/inspectors/peter-armstrong-si3111/
---

# Peter Armstrong, Title 5 System Inspector (SI #3111)

Peter Armstrong is on the NEIWPCC list of MassDEP-approved Title 5 System Inspectors dated October 2, 2026.

* **SI number:** #3111
* **Approval expires:** June 30, 2028
* **Approved by:** Massachusetts Department of Environmental Protection (MassDEP); list published by NEIWPCC
* **Business listing:** PA Construction
* **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)