No service station shall be erected on a plot having a front lot line of less than two hundred (200') feet. In the event that said service station shall be erected on a corner plot, the front line thereof shall be that line which is opposite the front wall of the service station. Said use shall be located on a lot having a minimum area of twenty thousand (20,000) square feet, and lot coverage shall not exceed twenty (20%) percent. In addition, if the Planning Board/Zoning Board of Adjustment finds that the nature of the particular use proposed, either by virtue of scale, intensity of use, hazard or other such considerations is such that a larger site area is necessary to protect the public welfare, then it shall impose such additional restriction.