This document provides COSHH assessments for various hazardous substances used in construction. It lists 97 substances across various categories like concreting, waterproofing, asphalt paving, plant and equipment, paints and coatings, plaster and render, roof waterproofing, sealants, tiling adhesives, and sundry items. For each substance, it provides information on the supplier, use, storage precautions, disposal procedure, spillage procedure, health effects, required controls, and first aid measures in case of emergencies. The aim is to ensure safe handling and use of these substances through proper assessments, precautions, controls and emergency response procedures.