---
kind: "unit"
title: "50"
title_heading: "War and National Defense"
key: "ch42/schIV"
level: "subchapter"
label: "Subchapter IV"
heading: "Defense Environmental Cleanup Matters"
release: "119-102"
date: "2026-07-12"
url: "https://uscodex.org/usc/50/ch42-schIV"
sections_count: 14
---

# Subchapter IV — Defense Environmental Cleanup Matters

Title 50 — War and National Defense › Chapter 42 — Atomic Energy Defense Provisions

## Contents

- [Part A — Defense Environmental Cleanup](/usc/50/ch42-schIV-ptA.md)
- [Part B — Closure of Facilities](/usc/50/ch42-schIV-ptB.md)
- [Part C — Hanford Reservation, Washington](/usc/50/ch42-schIV-ptC.md)
- [Part D — Savannah River Site, South Carolina](/usc/50/ch42-schIV-ptD.md)