Washington’s Law Against Discrimination (“WLAD”), RCW 49.60, prohibits discrimination against people for a variety of reasons, including physical and mental disability. Under the WLAD, an employee qualifies for reasonable accommodation if the employee’s impairment is known by the employer or shown through an interactive process to exist and, (a) he or she has an impairment that substantially limits his or her ability to perform the job; or (b) the employer has notice of the impairment and medical documentation establishes a likelihood that engaging in work without an accommodation would aggravate the impairment so that it would create a substantially limiting effect.