Controlling health risks due to workplace discrimination in a construction project involves several key steps, including:

1. Establishing a non-discrimination policy: The first step is to establish a non-discrimination policy that prohibits any form of discrimination based on race, gender, religion, age, or other factors.
2. Providing diversity and inclusion training: Workers should be provided with diversity and inclusion training to raise awareness of discriminatory behaviors and promote respectful and inclusive workplace culture.
3. Implementing equal opportunity practices: Equal opportunity practices should be implemented to ensure fair access to employment and career advancement opportunities for all workers.
4. Encouraging reporting and addressing of discrimination: Workers should be encouraged to report any instances of discrimination, and appropriate measures should be taken to address and prevent such behaviors.
5. Providing support and resources: Support and resources should be provided to workers who experience discrimination, including access to counseling and legal assistance.
6. Conducting regular assessments: Regular assessments should be conducted to identify potential areas of discrimination and to evaluate the effectiveness of anti-discrimination policies and practices.
7. Engaging with stakeholders: Engaging with stakeholders, including workers, labor organizations, and community groups, can help to raise awareness of discriminatory practices and promote collaborative solutions.

Overall, controlling health risks due to workplace discrimination in a construction project requires a comprehensive approach that includes establishing a non-discrimination policy, providing diversity and inclusion training, implementing equal opportunity practices, encouraging reporting and addressing of discrimination, providing support and resources, conducting regular assessments, and engaging with stakeholders.