Impact Assessment: As part of an internal audit for a large Canadian metal refinery, Airzone One conducted health, safety and environmental impact assessments. This project required investigations to determine the hazards and risks associated with the refinery s processes and procedures and identified areas of highest risk. A complete record of hazards, the potential consequences of the hazards, current safeguards, risk rating and recommendations for each area was developed. Airzone One staff recommended corrective actions and utilized a computer program to categorize and prioritize recommendations.