In this subtitle the following words have the meanings indicated. “Employee” means an employee (as defined in § 5-101 of this title) or former employee when the individual may be exposed under normal operating conditions or foreseeable emergencies. “Employee” includes: a line supervisor; a maintenance worker; a member or former member of a volunteer fire, ambulance, or rescue company; operating personnel; and a production worker. “Employer” means an employer (as defined in § 5-101 of this title) and includes a volunteer fire, ambulance, or rescue company. “Employer” does not include a farmer who: uses a hazardous chemical in farming; and complies with the applicable requirements of the Federal Insecticide, Fungicide, and Rodenticide Act.