When using ventilation to reduce a hazard you need to ensure: Question 6 options: A) The hazardous materials are not being exhausted into an area where other people may be exposed B) Adequate air flow and capture velocity exist in order to adequately capture the hazard at the source C) The hazardous materials are not being pulled through the worker's breathing area (i.e. the worker's breathing area should not be situation between the hazard source and the exhaust) D) All of the above