The planning commission may modify all yard, parking, landscaping, height and other requirements of the zone in which the historic site is located, as necessary to fulfill the purposes of this chapter. In so doing, the nature and character of adjacent properties shall be considered to ensure that the health, safety, convenience and general welfare will not be impaired. The planning commission may establish development criteria to control impacts associated with the heaviest permitted use in the base zone, including, but not limited to, noise, glare, dust or odor. (Ord. 2012-15, 9-20-2012)