Even with the training given to employees their health comes first and should be regularly monitored. Health authorities recommend that any employee that is constantly exposed to isocyanine is at risk of getting diseases, therefore, their health should be monitored. It might vary from company to company how they want to implement this, but one of the ways is to take urine samples of those that are exposed to isocyanate, this can be done monthly or on a quarterly basis depending on how the company wants to do it. Please check legislation regarding taking urine samples.