Please click on the links below to view our construction industry-related certificates or to learn more about our health & safety policies and our insurance cover. At Optima, we are particularly proud to have been recognised by the Contractors Health And Safety Scheme (CHAS). CHAS is the construction industry's leading body carrying out independent health and safety assessments, indicating that as contractors, we take health and safety seriously and have implemented policies, procedures and training to ensure that our work force operate in a safety conscious environment.