Durability of wood and wood-based products. Determination of emissions to the environment from wood treated with preservatives. Part 2: Wood products exposed to conditions according to Use Class 4 or 5

This technical specification addresses the evaluation of substances released into the environment from wood-based products that have undergone preservative treatments. It specifically focuses on items exposed under conditions categorized as usage classes 4 or 5, which typically involve ground contact or fresh water exposure. The document outlines the methodological requirements for conducting these assessments to ensure environmental safety. It provides a standardized framework for laboratories and testing facilities to measure the leaching of chemical agents from treated timber. By establishing consistent procedures, this work facilitates the comparison of results across different regions and ensures that data regarding substance migration is reliable. The approach considers the specific environmental interactions associated with high-exposure scenarios for wooden components. This specification serves as a reference for technical implementation without extending into broader regulatory mandates or risk assessments.