Controlling the risk of air pollution in a construction project involves several key steps, including:

1. Identify potential sources of air pollution: The first step is to identify the potential sources of air pollution in the construction project. This may include equipment exhaust, dust and particulate matter from construction activities, and chemical emissions from materials.
2. Implement engineering controls: Engineering controls, such as using low-emission equipment, dust suppression systems, and enclosing construction activities, should be used to control the release of pollutants into the air.
3. Develop a site-specific air quality management plan: A site-specific air quality management plan should be developed to outline the strategies and procedures that will be implemented to control air pollution. The plan should include procedures for monitoring and assessing air quality, identifying potential hazards, and implementing mitigation measures.
4. Provide personal protective equipment (PPE): Workers should be provided with PPE, such as respiratory protection, to protect against air pollution hazards. PPE should be appropriate for the specific hazard and level of exposure.
5. Provide training: Workers should be trained on the hazards associated with air pollution, how to use PPE, and the safe work procedures that have been developed. Training should be provided to all workers who may be exposed to air pollution hazards.
6. Monitor and review: Regular monitoring and review should be conducted to ensure that the controls that have been put in place are effective in controlling air pollution hazards.
7. Emergency response plan: An emergency response plan should be developed in case of incidents involving air pollution. Workers should be trained on the plan and it should be regularly reviewed and updated as needed.

Overall, controlling the risk of air pollution in a construction project requires a comprehensive approach that includes hazard identification, engineering controls, PPE, safe work procedures, training, monitoring, and emergency planning.