Final answer:
The correct OSHA guideline for the disposal of medical waste material is to not flush any chemicals down the drain to avoid environmental contamination and health hazards.
Step-by-step explanation:
Among the OSHA guidelines for disposal of medical waste material, the correct answer is option C: Do not flush any chemicals down the drain. It is essential to handle medical waste, including chemicals and biohazardous materials, with special care to prevent contamination and harm to individuals and the environment. Chemicals should not be disposed of down the sink because they can pose a considerable hazard to the water supply and environment. Instead, follow proper disposal methods such as using designated containers and having waste treated by autoclaving before disposal. Also, sharp objects should be disposed of in puncture-resistant containers, not glass ones, to prevent injury and cross-contamination.