This document intends to provide a guideline for barriers waterproofing and protection specific to the protection against leakage and contamination underground conditions for underground concrete structures. This document addresses the following topics in the coming sections.

1. Ambient and environmental conditions of underground concrete structures

2. Types of barriers used for waterproofing and protection

3. Performance requirement for waterproofing and protection

4. Performance evaluation for waterproofing and protection

5. Selection procedure of optimal waterproofing and protection