"Sandy Clark has worked for Healthy Meals Company for 10 years in a facility that cooks and packages prepared, frozen meals. Sandy is part of a crew that provides cleaning and sanitation services for the equipment used to prepare the meals. She has always sustained an excellent work record with no complaints about her work performance. She was recently assigned to the night shift to clean and sanitize the equipment used to mix and dispense sauce for the meals. The equipment consists primarily of a large vat and a rotating paddle with wooden blades driven by an electrical motor to continuously stir the sauce. After the meal preparation crew finishes production for the day shift, Sandys work begins cleaning and sanitizing the equipment for production the next day. Sandy was trained to clean and sanitize the equipment by observing an experienced member of the sanitizing crew who had been performing the work for the past 3 years. During her training, she was instructed to use a high-pressure water hose, bleach, and sanitizing cleaner on the paddle blades and the lower part of the vat, then use a sponge pad to scrub the top part of the vat. Her trainer explained the best way to get the wooden paddles thoroughly clean was to spray them while the machine was running, then turn off the equipment and lock it out before she used the sponge pad to clean the inside of the vat. After 2 days of training, Sandy demonstrated to the person who trained her that she could satisfactorily perform all the duties of cleaning the equipment. During her second week of working alone cleaning the vat and the wooden paddles of sauce residue, she was spraying the paddles using the high-pressure water hose while the machine was running with the paddles turning in the vat. While holding the sponge pad in one hand and holding the hose nozzle in the other hand, she finished spraying the moving paddles and accidently dropped the pad from her hand into the vat. She reached to grab the sponge pad as a reflex action and the fingertips of her rubber gloves were caught between the wall of the vat and the paddle. The paddle pulled her right hand further into the hopper up to her knuckles. Immediately, a nearby coworker turned off the equipment and freed Sandys hand. Fortunately, she only suffered minor injuries to her hand. She later stated that she reacted to reach for the pad and catch it to avoid damage to the equipment. After an investigation was conducted by a safety inspector, the companys management stated that Sandy did not follow the proper procedure for cleaning the equipment by first unplugging the power cord for the motor, then locking out the electrical source to ensure that no one started the motor. This procedure was to be followed before any cleaning of the equipment was started. During her rebuttal, Sandy claimed that discharge was too severe a punishment in light of her 10 years of service to the company and that she was never told by any management official that her job performance was unacceptable. According to two other employees who previously held this job, training for these duties was typically done with instruction and observation by someone who had previously carried out the tasks. Sandy pointed out that she followed the procedure for cleaning and sanitizing that she was taught by another employee during her training and no one had ever instructed her otherwise. She added that she learned from her mistake and that she would not make that mistake again. She believed that progressive discipline should be used in this particular case. Sandy was subsequently fired for willfully violating the companys proper safety procedures.

Question: If Sandy is represented by a labor union with a current labor agreement or contract stating that employees shall only be discharged for Just Cause, how could this affect her termination?