The presence of soluble sulphates and chlorides in concrete and aggregate materials poses a significant risk to the long-term durability of reinforced concrete structures, contributing to reinforcement corrosion, sulfate attack, and premature structural deterioration. Western Geotechnical Laboratory Services (WGLS) provides accredited concrete chemical testing to AS 1012.20.1, including Acid Soluble Sulphate analysis for aggregate and concrete, and Acid Soluble Chloride analysis for aggregate. These tests are essential for concrete mix design verification, durability assessment, and compliance with structural and exposure classification requirements under AS 3600 — giving structural engineers, concrete producers, and project specifiers the chemical characterisation data needed to ensure the integrity of concrete construction across Western Australia.