(c) An employer may require the collection and testing of a sample of an employee's or prospective employee's urine, oral fluid, or breath for any job-related purpose consistent with business necessity and the terms of the employer's policy, including
- (1) investigation of possible individual employee impairment;
- (2) investigation of accidents in the workplace; an employee may be required to undergo drug testing or alcohol impairment testing for an accident if the test is taken as soon as practicable after an accident and the test is administered to employees who the employer reasonably believes may have contributed to the accident;
- (3) maintenance of safety for employees, customers, clients, or the public at large;
- (4) maintenance of productivity, the quality of products or services, or security of property or information;
- (5) reasonable suspicion that an employee may be affected by the use of drugs or alcohol and that the use may adversely affect the job performance or the work environment.