Breaks and Lunch Breaks. A 30 or 60 minute unpaid lunch shall be given to all full-time employees. Employees may negotiate scheduling and duration of their lunch breaks with the supervisor. For every four hours worked, an employee receives a 15 minute paid break to be scheduled with the supervisor. Full-time employees shall be entitled to a 15 minute paid break for each 4 hours worked which may be combined for a one-half (1/2) hour paid lunch at the employee's option with the agreement of the supervisor. These breaks shall be duty free unless agreed to otherwise by the union and the employee. Notwithstanding the above, certain jobs may require the employee's continued presence during lunch period and breaks.